MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
III year II sem
Automobile engineering
QUESTION BANK
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Question
UNIT-5
What is the function of charging system? Explain.
What is the principle of a generator? Give its constructional details
Discuss about the torque and speed requirement for engine starting.
Explain the Bendix drive starting mechanism with neat sketch
Explain briefly the lighting system provided in a car and function of each unit.
Describe the working of a fuel gauge
Explain the working principle of the current –voltage regulator.
Discuss briefly about the starting system.
Explain the working principle of the starting system and Bendix drive
mechanism with neat sketch.
Explain the principle and working function of the lighting system and
application in automobiles.
Discuss briefly about the horn and wiper and its usage in automobiles and its
application.
Explain the principle of oil pressure gauge in Automobiles and sketch it.
Discuss briefly about the engine temperature indicator and its application.
Write down the importance of the electrical system in Automobiles and its
application
Explain the application of charging circuit and lighting system.
Explain the principle and application of sensors in electrical system
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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Question
UNIT-6
Explain the principle of the transmission system.
Define the working function of the clutch.
Classify the types of clutches.
Explain the working the function of the cone clutch.
Discuss briefly about the working principle of single clutch plate
Explain the working principle of the multiple clutch plate
Explain the working of a centrifugal clutch and sketch it.
What are the requirements of clutch and its function.
Explain the working of a semi-centrifugal clutch and sketch it.
Describe the working of a constant mesh type gear box with the help of
neat sketch
Explain the construction and working of synchromesh type gear
engagement with a sketch and list out its advantages
With the help of a neat sketch , explain the construction and operation of
a sliding mesh gearbox
What is an overdrive? What are its advantages and applications?
Explain the working function of Differential gear box and application
Explain the working principle of universal joint with a neat sketch
Discuss briefly about the working function of the Hotch-kiss drive and
sketch it.
Question
UNIT-7
Explain the importance of the suspension system
Discuss about the working of braking system
List the types of suspension system
Explain the working of rigid axle suspension system
Explain the working of torsion bar.
Discuss the importance of the shock absorber
Discuss briefly about the independent suspension system
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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Explain the working of mechanical brakes
Explain the working of hydraulic brakes and its application.
Discuss the importance of master cylinder and its functions.
Classify the types of braking system and sketch any one braking system
Suggest the good braking system for the automobiles in daily usage
Explain the working function of pneumatic brakes and its application
Discuss the working function of the vacuum brakes and sketch
Illustrate the importance of the braking system
Write down the application of the shock absorber and brakes
Question
UNIT-8
List the importance of the steering system in automobiles.
Define steering geometry and its working
Define camber.
Define castor.
Explain the usage of the king pin.
Discuss about the toe-in and toe-out.
What is mean by correct steering mechanism in four wheelers
Explain the working function of the Davis steering mechanism
Explain the working function of the Ackerman steering mechanism and
sketch it.
What is mean by instaneous centre? And its application in steering.
State the application of the instaneous centre in Davis steering gear
mechanism.
Discuss briefly about the usage of turning pairs in steering mechanism
Discuss briefly about the usage of sliding pairs in steering mechanism and
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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sketch it.
Write down the application of steering linkages
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Explain the working function of Hooke’s joint in steering mechanism and
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sketch it
Discuss briefly about the Rack and pinion mechanism and sketch.
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
III year II sem
DESIGN OF MACHINE MEMBERS-II
QUESTION BANK
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Question
UNIT-5
How the gears classified and what are the various terms used in spur gear.
Write the expressions for static load for spur gear and explain the various
terms used there in.
Discuss the design procedure of spur gears.
Write the expressions for limiting wear load for spur gear and explain the
various terms used there in.
Write a short note on gear drives giving their merits and demerits.
Write the expressions for dynamic load for spur gear & explain the
various terms used there in.
Discuss the systems of gear teeth are commonly used.
Explain the beam strength of gear teeth, according to the Lewis equation.
A pair of straight teeth spur gears is to transmit 20kW when the pinion
rotates at 300rpm. The velocity ratio is 1:3. The allowable static stresses
for the pinion and gear materials are 120MPa and 100MPa respectively.
The pinion has 15 teeth and its face width is 16 times the module.
Determine the Module; face width and Pitch circle diameters of both the
pinion and the gear from the stand point of strength only, taking into
consideration the effect of the dynamic loading. The tooth form factor y
can be taken as y= 0.154-0.912/no.of teeth and the velocity factor Cv = 3/
(3+v), where v is in m/s.
A pair of straight teeth spur gears, having 200 involute full depth teeth is
to transmit 12KW at 300rpm of the pinion. The speed ratio is 3:1.The
allowable static stresses of gear of cast iron and pinion of steel are 60MPa
and 105MPa respectively. Assume the following particulars:
Number of teeth on the pinion, np = 16, Face width, b = 14m (m
=module),
Velocity factor, Cv = 4.5/(4.5+v) (v=Pitch line velocity, m/s), Tooth form
factor, y = 0.154-(0.912/No. of teeth), Determine the module, face width
and pitch diameters of the gears. Also check the gears for wear. Given:
Endurance limit, σes = 600Mpa, Modulus of elasticity, Ep = 2 x105 MPa
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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(P-Pinion), Eg = 1 x105 MPa (g-gear)
A gear drive is required to transmit a maximum power of 22.5kW. The
velocity ratio is 1:2 and pinion speed is 200 rpm. T he approximate center
distance between the shafts may be taken as 600mm. The teeth have 200
stub involute profiles. The static stress for the gear material (CI) is 60MPa
and face width as 10 times the module. Find the module, face width and
number of teeth on each gear. Check the design for dynamic and wear
loads. The deformation or dynamic factor in the Buckingham equation
may be taken as 80 and combination factor for the wear as 1.4.
A pair of C45 steel annealed SPW-gears with cast teeth transmit 18.75kW
& 60 rev/min of the pinion. The pitch diameter of the pinion is
approximately 0.23m & the velocity ratio is 2.5. Determine the module &
face of the gears also the correct pitch diameters & tooth numbers. Check
for dynamic load.
Design a pair of spur gears with stub teeth to transmit 55kW from 175
mm pinion running at 2500 r.p.m. to a gear running at 1500 r.p.m. Both
the gears are made of steel having B.H.N 260. Approximate the pitch by
means of Lewis equation and then adjust the dimensions to keep within
the limits set by the dynamic load and wear equation.
The following particulars refer to a spur gear drive:
Centre distance = 200mm, Velocity ratio= 4, power = 50kW pinion speed
= 1440 rpm, tooth profile = 20degree full depth involute, permissible
normal load between the teeth = 160N/mm of the face width. Design the
drive. Also determine the load on the bearings, stating its nature. Assume
that both the gears are mounted on overhanging shafts.
A pair of spur gears, having 14 1/20 involute full depth teeth is to transmit
12KW at 300rpm of the pinion. The velocity ratio is 3:1.The static
strengths of cast iron gear and steel pinion are 60MPa and 105MPa
respectively. Determine the module, face width and pitch diameters of the
gears. Also check the gears for wear. Use the following particulars:
Number of teeth on the pinion, np = 16, Face width, b = 10m (m
=module),
Velocity factor, Cv = 4:5/(4:5+v)
(v=Pitch line velocity, m/s),
Endurance limit, σes = 600Mpa, Modulus of elasticity, Ep = 2 x105 MPa
(P-Pinion); Eg = 1 x105 MPa (g-gear)
A bronze spur pinion rotating at 560rpm drives a cast steel gear with
transmission ratio as 4. The pinion has 18 teeth with 200 full depth
involute profile; the module being 5mm. The face width of the gearing is
25mm. Determine the power that can be transmitted from the stand point
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
of strength. Static strength for bronze is 80MPa, and for cast steel it is
100MPa.
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Question
UNIT-6
What is herringbone gear? Where they are used.
Write the expressions for static load for helical gear and explain the
various terms used there in.
Write the expressions for limiting wear load for helical gear and explain
the various terms used there in.
Write the expressions for dynamic load for helical gear and explain the
various terms used there in.
How the bevel gears are classified.
Derive the pitch angle for bevel gears.
A pair of helical gears consists of a 20 teeth pinion meshing with a 100
teeth gear. The pinion rotates at 720 r.p.m. The normal pressure angle is
20o while the helix angle is 25o. The face width is 40 mm and the normal
module is 4mm. The pinion as well as the gear are made of steel having
ultimate strength of 600MPa and heat treated to a surface hardness of
300B.H.N. The service factor and factor of safety are 1.5 and 2
respectively. Assume that the velocity factor accounts for the dynamic
load and calculate the power transmitting capacity of the gears.
Two parallel shafts are connected by a pair of steel helical gears. The
power transmitted is 15kW at 4000rpm of the pinion. The safe static
strength for the material is 100MPa. Gear ratio is 4:1 Stub teeth with 200
pressure angle in diameter plane have helix angle of 450. Calculate the
necessary BHN with the standard point of wear. Check the design for
dynamic load and suggest modification if necessary. Use 30 teeth on the
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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pinion.
A pair of helical gears has 200 stub teeth in the diameteral plane. Helix
angle is 450. The pinion rotates at 8,000rpm, and transmits 12kW. Gear
ratio is 4:1.Safe static stress for the material for pinion and gear 100MPa.
The BHN for the pinion 300 and that of gear 200. Find the module and
face width, if the center distance is 200mm. And check the design for
dynamic load & wear strength if error is 0.01mm.
A pair of helical gears is to transmit 15 kW. The teeth are 20° stub in
diametral plane and have a helix angle of 45°. The pinion runs at 10,000
r.p.m. and has 80mm pitch diameter. The gear has 320mm pitch diameter.
If the gears are made of cast steel having allowable static strength of
100MPa; determine a suitable module and face width from static strength
considerations and check the gears for wear, given σes = 618 MPa.
A helical cast steel gear with 30° helix angle has to transmit 35 kW at
1500r.p.m. If the gear has 24 teeth, determine the necessary module, pitch
diameter and face width for 20° full depth teeth. The static stress for cast
steel may be taken as 56 MPa. The width of face may be taken as 3 times
the normal pitch. The tooth factor for 20°full depth involute gear may be
taken as 0.154-(0.912/TE) where TE represents the equivalent number of
teeth.
A pair of bevel gears with 200 pressure angle, consists of a 20 teeth pinion
meshing with a 40 teeth gear. The module is 4mm & face width is 20mm.
the static strength of the steel used for the pinion & gear is 200Mpa. The
pinion rotates at 500rpm & receives power from an electric motor.
Determine the rated power that the gears can transmit, from the strength
point of view.
A pair of C.I. bevel gears connect two shafts at right angles. The pitch
diameters of the pinion & gear are 80mm & 100mm respectively. The
tooth profiles of the gears are of 14120 composite forms. The allowable
static stress for both the gears is 55MPa. If the pinion transmits 2.75kW at
1100rpm. Find the module, number of teeth on each gear from the
standpoint of strength, & check the design from the standpoint of wear.
Take surface endurance limit as 630MPa and modulus of elasticity for
cast iron as 84kN/mm2.
A pair of 20º full depth involute teeth bevel gears connect two shafts at
right angles having velocity ratio 3:1. The gear is made of cast steel
having allowable static stress as 70MPa and the pinion is of steel with
allowable static stress as 100 MPa. The pinion transmits 37.5 kW at 750
r.p.m. Determine: 1. Module and face width; 2. Pitch diameters. Assume
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
15
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tooth form factor, y = 0.154 – (0.912/TE), where TE is the formative
number of teeth, width = 1/3 rd the length of pitch cone.
A 35 kW motor running at 1200 r.p.m. drives a compressor at 780 r.p.m.
through a 90° bevel gearing arrangement. The pinion has 30 teeth. The
pressure angle of teeth is 14 1/2° . The wheels are capable of withstanding
a dynamic stress, σw = 140 [280/(280+ v)] MPa, where v is the pitch line
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speed in m / min. The form factor for teeth may be taken as 0.124 –
(0.686/TE), where TE is the number of teeth equivalent of a spur gear.
The face width may be taken as1/4 of the slant height of pitch cone.
Determine for the module and face width.
A pair of bevel gears connects two shafts at right angles and transmits 9
kW. Determine the required module and gear diameters for the following
specifications :
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Check the gears for wear loads.
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Question
UNIT-7
Discuss the various types of power threads. Discuss their relative
advantages and disadvantages.
Differentiate between differential screw and compound screw.
Derive the expression for torque required to raise load by square threaded
screws.
Derive the expression for torque required to lower load by square
threaded screws.
Derive the expression for efficiency of square threaded screws.
Discuss about the various types of stresses in power screws.
Derive the expression for efficiency of the differential screw.
Derive the expression for efficiency of the compound screw.
The lead screw of a lathe has ACME threads of 50mm nominal diameter
and 8mm pitch. The screw must exert an axial thrust of 2.5kN for driving
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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the carriage. The thrust is carried on a collar with 55mm inner diameter
and 110mm outer diameter. The lead screw rotates at 30 r.p.m.
Determine,
i. the power required to operate the screw, and
ii. The efficiency of the lead screw. Take coefficient of friction for
the screw thread as 0.15 and for the collar surface as 0.12.
A power screw having double start threads of 25mm nominal diameter
and 5 mm pitch is acted upon by an axial load of 10kN. The outer and
inner diameters of screw collar are 50 and 20mm respectively. The
coefficient of thread friction and collar friction may be assumed as 0.2
and 0.15 respectively. The screw rotates at 12rpm. Assuming uniform
wear condition at the collar and allowable thread bearing pressure of 5.8
N/mm2 find:
i. The torque required to rotate the screw.
ii. The stress in the screw and
iii. The number of threads of nut in engagement.
A screw jack suitable to lift a maximum load of 100kN through a height
of 400mm with a ground clearance of 600mm is to be designed with the
following:
Allowable stresses for screw: Tensile stress =200N/mm2; Compressive
stress =200 N/mm2; Shearing stress =120 N/mm2. Allowable bearing
pressure between nut and screw is 18 N/mm2, Coefficient of friction of
threads and collar may be taken as 0.14. Allowable bending stress for MS
handle is 100 N/mm2. Design the screw.
A 60mm triple start square thread with 10mm pitch is used with a collar
having 30mm inner diameter and 100mm outer diameter. The coefficient
of friction at the thread surface and the collar surface may be taken as
0.15. If the screw is required to be used to raise a load of 20kN, using
uniform wear theory for the collar friction, determine,
a. the torque required to raise the load
b. the torque required to lower the load and
c. The force required to raise the load, if it is applied at a radius of
600mm.
A triple, square threaded power screw, used in a screw jack, has a
nominal diameter of 50mm and a pitch of 6mm.The length of the nut is
42mm.The screw jack is used to lift the load of 8KN. The coefficient of
friction at the threads is 0.15, and the collar friction is negligible.
Determine
i. The principle shear stress in the screw body,
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
ii.
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The transverse shear stress induced in the screw and nut
threads, and
iii. The bearing pressure induced on the thread surface.
What force will be required at a radius of 80mm to raise and lower a Apply
11kN cross bar of a planer? The bar is raised and lowered by two 38mm
square thread screws, having a pitch of 7mm. The screw is of steel and
nut is of bronze 38mm thick. The collar is of steel and it has an outside
diameter of 76mm and inside diameter of 38mm. Assumes the coefficient
of friction at the threads as 0.11 and at the collar as 0.13.
A vertical two start square threaded screw of a 100 mm mean diameter Apply
and 20 mm pitch supports a vertical load of 18 kN. The axial thrust on the
screw is taken by a collar bearing of 250 mm outside diameter and 100
mm inside diameter. Find the force required at the end of a lever which is
400 mm long in order to lift and lower the load. The coefficient of friction
for the vertical screw and nut is 0.15 and that for collar bearing is 0.20.
The cutter of a broaching machine is pulled by square threaded screw of Apply
55 mm external diameter and 10 mm pitch. The operating nut takes the
axial load of 400 N on a flat surface of 60 mm and 90 mm internal and
external diameters respectively. If the coefficient of friction is 0.15 for all
contact surfaces on the nut, determine the power required to rotate the
operating nut when the cutting speed is 6 m/min. Also find the efficiency
of the screw.
Question
UNIT-8
What are the various forces acting on worm and worm gears?
Discuss the various types of worms and worm gears.
Define the following terms used in worm gearing :
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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(a) Lead; (b) Lead angle; (c) Normal pitch; and (d) Helix angle.
Write the expression for centre distance in terms of axial lead, lead angle
and velocity ratio.
Derive the expression of efficiency of worm gearing.
Write the expressions for static load for worm gear and explain the
various terms used there in.
Write the expressions for limiting wear load for worm gear and explain
the various terms used there in.
Write the expressions for dynamic load for worm gear and explain the
various terms used there in.
A hardened steel worm rotating at 1200rpm transmits power to a
phosphor bronze gear with a transmission ratio of 15.The center distance
is 200mm. Calculate the principal dimensions of the drive, and determine
the input ratings from the stand point of strength, wear and heat
dissipation.
A triple threaded worm has teeth of 6 mm module and pitch circle
diameter of 50 mm. If the worm gear has 30 teeth of 14½° and the
coefficient of friction of the worm gearing is 0.05, find 1. the lead angle
of the worm, 2. Velocity ratio, 3. centre distance, and 4. Efficiency of the
worm gearing.
Design a speed reducer unit of worm and worm wheel for an input of
1KW with a transmission ratio of 25.The speed of the worm is
160rpm.The worm is made of hardened steel and the wheel of phosphor
bronze for which the material combination factor is 0.7N/mm2. The static
stress for the wheel material is 56MPa. The worm is made of double start
and the centre distance between the axes of the worm and wheel is
120mm. The tooth form is to be 14 1/20 involute. Check the design for
strength.
A worm drive transmits 15 kW at 2000 r.p.m. to a machine carriage at 75
r.p.m. The worm is triple threaded and has 65 mm pitch diameter. The
worm gear has 90 teeth of 6 mm module. The tooth form is to be 20° full
depth involute. The coefficient of friction between the mating teeth may
be taken as 0.10. Calculate: 1. tangential force acting on the worm; 2.
axial thrust and separating force on worm; and 3. efficiency of the worm
drive.
Determine the power capacity of a worm gear speed reducer unit;
composed of a hardened steel worm and phosphour bronze worm gear,
having 200 full depth involute teeth. The centre distance is 200mm and the
velocity ratio is 10. The worm speed is 1400rpm.
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
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A speed reducer unit is to be designed for an input of 3kW, with a
transmission ratio of 20. The speed of the hardened steel worm is 1800
rpm. The worm gear is to be made phosphour bronze. The tooth form is to Apply
be 14 ½0 involute. Determine the principal dimensions, from the stand
point of strength.
A 2W power is supplied to the worm shaft at 720rpm. The worm is of
quadruple start type with 50mm as pitch circle diameter. The worm gear
has 40 teeth with 5mm module. The pressure angle in the diameteral plane Apply
is 200. Determine i) the lead angle of the worm, ii) efficiency of the worm
gear drive.
A double threaded worm drive is required for power transmission
between two shafts having their axes at right angles to each other. The
worm has 14½° involute teeth. The centre distance is approximately
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200mm. If the axial pitch of the worm is 30 mm and lead angle is 23°,
find 1. lead; 2. Pitch circle diameters of worm and worm gear; 3. helix
angle of the worm
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
III year II sem
FEM
1. Explain triangular coordinates?
2. for the elements given in Fig: the nodal displacements are given a
ux1=2.0 mm, ux2=0.5 mm, ux3=3.0 mm
uy1= 1.0 mm, uy2=0.0 mm, uy3=0.5 mm.
Evaluate the element stresses. Consider the plane stress condition.
Assu e E=
GPa, Poisso s ratio μ= .
a d t=
.
3. Explain strain and stress field of a triangular element?
4. Evaluate the stiffness matrix for the elements shown in Fig: .Assume plane stress
Conditions. Take E=
GPa, Poisso s ratio μ = . 8 a d t=
.
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
5. Establish the shape functions for a 3 – noded triangular element.
6. Find the deformed configuration, and the maximum stress and minimum stress locations for the
Rectangular plate loaded as shown in the fig.4. Solve the problem using 2 triangular elements.
Assume thickness = 10cm; E = 70 Gpa, and υ = 0.33.
7.
8.
Derive the stiffness matrix [K] and the load vector for the two dimensional simplex element
Shown in Fig. also determine nodal displacements of triangular element,
Strai a d stress of a ele e t. Assu e E =
MPa, μ= . a d t =
.
Unit-6
1. Write the shape function of Isoperimetric elements?
2. For the triangle find the shape functions N3 a d Y at a poi t P if
N1=0.3 and x= 3.3. ( x1 y1)=(1,2), (x2 y2)=(5,4), (x3,y3)=(3,7).
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
3. What is Iso parametric representation of CST? 2M
4. for the tria gle ele e t show i Fig: fi d shape fu ctio s at a P also fi d the
Stiffness matrix, stresses and strains if E = 2 X 105 N/mm2, Poisso s ratio μ = . for
Plane stress and plane strain conditions. 3M
5. A triangular element is as shown in figure. The (x, y) coordinates are as shown at respective
nodes. The elements nodal displacement vector is specified as
{q}= {0,1,0.2,0.6,0.3,0.4,0.8}and is shown in Fig. Determine a) Jacobian of the element
6. The natural coordinates of the point P (x = 5, y = 5) The displacement vector at the points P.
7. What is Isoparametric representation of CST?
8. Distinguish between consistent mass matrix and lumped mass matrix
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
Unit -7
1. Derive one dimensional steady state heat conduction equation
2. apply to one dimensional fin problem
3. Determine the temperature distribution in a straight fin of circular c/s(2M). Use three one
dimensional linear elements and consider the tip is insulated.
2
0
0
Diameter of fin is 1 cm, lengtis6 cm, h = 0.6 W/cm C, φ∞= 25 C and base temperature is 1φ=8 C.
4 Consider axial vibration of the steel bar shown in Fig. (a) develop the global stiffness and
consistent mass matrices(2M) and (b) determine the natural frequencies and mode shapes using the
characteristic polynomial technique with help of linear and quadratic shape function concept and E =
210GPa.
5. Derive the stiffness matrix of a one dimensional thermal element?
6. Derive the stiffness matrix of a one dimensional thermal element.
7. Discuss the finite element formulation for the solution of one dimensional steady
State heat transfer problems
8. Discuss one dimensional formulation of Fin?
Unit-8
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
1. What is Dynamic Analysis?
2. Explai Ha ilto s Pri ciple?
3. For the stepped bar shown in Fig: Find a) Eigen values. Eigen vectors
4. node shapes ?
5. Consider axial vibration of the steel bar shown in fig
Develop the global stiffness and mass matrices
6. Determine the natural frequencies and mode shapes using the characteristic polynomial
Technique
7. Consider axial vibration of the steel bar shown in Fig. (a) develop the global stiffness and
consistent mass matrices
8. determine the natural frequencies and mode shapes using the
characteristic polynomial technique with help of linear and quadratic shape function concept and E
= 210GPa.
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
Course: III B.Tech – II Sem
Branch: Mech
HEAT TRANSFER
QUESTION BANK
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Question
Blooms
Taxonomy
Level
UNIT-5
What is meant by free or natural convection & forced Understand
convection?
What is the form of equation used to calculate heat transfer Understand
for flow through cylindrical pipes?
Discuss the heat transfer from an isothermal vertical Understand
surface to surrounding air in free convection.
List various parameters which influence natural convection Remember
heat transfer
The heat transfer coefficient is less in natural convection Remember
compared to forced convection. Why?
Distinguish between bulk mean temperature and film Understand
temperature
What is the significance of dimensionless numbers in Remember
natural convection heat transfer? Explain
Understand
Distinguish between free and forced convection
A large vertical plate 4 m height is maintained at 606C and Apply
exposed to atmospheric air at 106C. Calculate the heat
transfer is the plate is 10 m wide.
A thin 100 cm long and 10 cm wide horizontal plate is Apply
maintained at a uniform temperature of 150C in a large
tank full of water at 75C. Estimate the rate of heat to be
supplied to the plate to maintain constant plate temperature
as heat is dissipated from either side of plate.
A vertical pipe of 5cm diameter carrying hot water is Apply
exposed to ambient air at 150C. If the outer surface of the
pipe is at 650C. Find the heat loss from one meter height of
the pipe per hour.
A horizontal steam pipe 0.3m in diameter is maintained at a Apply
temperature of 2500C in still air at 1500C. Calculate the free
convection loss per meter length of the pipe.
A hot square plate of 75cmx75cm at 1200C is exposed to Apply
atmospheric air at 400C. Find the heat lost from both
14
15
16
surface of the plate if it is kept in vertical position.
Calculate the average coefficient of heat transfer for natural Apply
convection for a vertical plate 30cm high at 500C.The
surrounding air is at240C.
A vertical cylinder 1.8m high and 7.5 cm in diameter is Apply
maintained at a temperature of 93C in an atmospheric air
of 30 C. Calculate the heat lost by free convection from this
cylinder.
Calculate the heat transfer from a 60 W incandescent bulb Apply
at 115C to ambient air at 25C. Assume the bulb as a
sphere of 50mm diameter. Also, find the percentage of power
lost by free convection.
The correlation is given by: Nu = 0.60(Gr.Pr)1/4
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Question
UNIT-6
What is meant by Boiling and condensation?
Discuss briefly the various regimes in pool boiling heat
transfer
Differentiate between pool boiling and flow boiling
Give the applications of boiling and Condensation
Distinguish between nucleate and film boiling.
Explain briefly the condensation mechanism
What is meant by Film wise and Drop wise condensation?
Blooms
Taxonomy
Level
Remember
Understand
Understand
Understand
Understand
Understand
Remember
Discuss briefly the various regimes in forced boiling heat
Understand
transfer
A nickel wire carrying electric current of 1.5 mm diameter
and 50 cm long, is submerged in a water bath which is open
to atmospheric pressure. Calculate the voltage at the burn Apply
out point, if at this point the wire carries a current of 200A.
A condenser is to designed to condense 600 kg/h of dry
saturated steam at a pressure of 0.12 bar. A square array of
400 tubes, each of 8 mm diameter is to be used. The tube Apply
surface is maintained at 30C. Calculate the heat transfer
coefficient and the length of each tube.
Steam at 0.080 bar is arranged to condense over a 50 cm
square vertical plate. The surface temperature is maintained
at 20C. Calculate the following.
a. Film thickness at a distance of 25 cm from the top of
the plate.
Apply
b. Local heat transfer coefficient at a distance of 25 cm
from the top of the plate.
c. Average heat transfer coefficient.
d. Total heat transfer
e. Total steam condensation rate.
12
A vertical flat plate in the form of fin is 500m in height and
is exposed to steam at atmospheric pressure. If surface of
the plate is maintained at 60C. calculate the following.
1. The film thickness at the trailing edge
Apply
2. Overall heat transfer coefficient
3. Heat transfer rate
4. The condensate mass flow rate.
Assume laminar flow conditions and unit width of the plate.
13
Water is boiling on a horizontal tube whose wall temperature
is maintained ct 15C above the saturation temperature of
water. Calculate the nucleate boiling heat transfer
coefficient. Assume the water to be at a pressure of 20 atm.
And also find the change in value of heat transfer coefficient
Apply
when
1. The temperature difference is increased to 30C at a
pressure of 10 atm.
2. The pressure is raised to 20 atm at  T = 15C
14
Water is boiled at the rate of 24 kg/h in a polished copper
pan, 300 mm in diameter, at atmospheric pressure.
Assuming nucleate boiling conditions calculate the Apply
temperature of the bottom surface of the pan.
A heated brass plate at 1600C is submerged horizontally in
water at a pressure corresponding to a saturation
Apply
temperature of 1200C. What is the heat transfer per unit
area? Calculate also the heat transfer coefficient in boiling.
16 Dry saturated steam at a pressure of 2.5 bar condenses on
the surface of a vertical tube of height 1.5m. The tube
surface temperature is 1200C. Estimate the thickness of Apply
the condensate film and the local heat transfer coefficient
at a distance of 0.3m from the upper end of the tube.
15
Sl.
No.
Question
Blooms
Taxonomy
Level
1
UNIT-7
Define heat exchanger? What are the types of heat Remember
exchangers?
2
What do you mean by ‘fouling’ in heat exchangers?
Remember
3
Derive an expression for LMTD for the case of Counter flow
heat exchanger.
Give comparison of parallel flow and counter flow heat
exchangers. Why are counter flow heat exchangers mostly
used?
How heat exchangers are classified? Discuss briefly different
types of heat exchangers.
Write the advantages of NTU method over LMTD method.
Draw temperature profiles of a counter flow heat exchanger
when
Understand
4
5
6
7
Understand
Understand
Remember
Remember
i. hot fluid condenses
ii. cold fluid boils.
8
9
Derive an expression for effectiveness of a parallel flow heat Understand
exchanger using NTU method.
Steam is condensed in a single pass condenser at a pressure Apply
of 0.5 bar. The condenser consists of 100 thin walled tubes
of 2.5 cm nominal diameter and 2m length. The cooling
water enters and leaves at a temperature of 100C and 500C
with a mean velocity of 2 m/Sec. The condensing heat
transfer coefficient is 5 KW/m2 - K. Find (i) Overall heat
transfer coefficient for heat exchanger
(ii) Condensation rate of steam
(iii) Mean temperature of metal at the
center of condenser length.
10
A hot gas at the rate of 16.2 kg/Sec at 6480C (Cp=3.52 kJ/kg-K) Apply
is used to heat 20.2 kg/sec of the increasing fluid from 100 0C
(Cp=4.2 kJ/kg K) in a heat exchanger. If the overall heat transfer
Coefficient is 0.92 kW/m2-K for an effective area of 43.8m2, find
the fluid outlet temperatures for counter flow and parallel flow
arrangements.
11
A double pipe heat exchange is constructed of a stainless steel Apply
(k=15.1w/mk) inner tube of Di=15mm and D0=19mm and the
outer tube of diameter 32mm. The convection heat transfer
coefficient is given to be hi=800w/m2k and h0=1200w/m2k. For a
fouling factor of Rfi=0.0004m2k/w on the tube side and
Rf0=0.0001m2k/w on the shell side, determine Ui of the heat
exchanger.
12
In a heat exchanger hot fluid enters at 1800C and leaves at 1180C Apply
the cold fluid enters at 990C and leaves at 1190C. Find the LMTD
and effectiveness in the following cases. Also find NTU values for
one shell passes and multiple tube pass.
13
In an industry 0.6 kg/s of oil (Cp=2.5kJ/kg-k) is to be cooled in a Apply
counter flow heat exchanger from 1100C to 350C by the use of
water entering at 200C. The overall heat transfer coefficient is
1500w/m2k. Pressuring the exit water temp should not exceeds
800C, using NTU method. Calculate water flow rate.
14
Water at the rate of 68 kg/min is heated from 35 to 75 °C by Apply
an oil having a specific heat of 1.9 kJ /kg. °C. The fluids are
used in a counterflow double-pipe heat exchanger, and the
oil enters the exchanger at 110 °C and leaves at 75 °C. The
overall heat-transfer coefficient is 320 W/m2 .°C. Calculate
the heat exchanger area.
A heat exchanger is required to cool 55000 kg/h of alcohol Apply
from 66°C to 40°C using 40000 kg/h of water entering at
5°C. Calculate the surface area required for
(i) Parallel flow
(ii) Counter flow mode.
Take U = 580 w/m2k, Cp for water = 4180 J/kg K, Cp for
alcohol = 3760 J/kg K
Determine the overall heart transfer coefficient based on the Apply
outer area of a 3.81 cm O.D and 3.175 cm I.D brass tube
(k=103.8 W/m K) if the heat transfer coefficient for flow
inside and outside the tube are 2270 and 2840 w/m2k
respectively and the unit fouling resistances at inside and
outside are Rfi=Rfo=0.0088m2K/W
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Question
UNIT-8
Define emissive power and monochromatic emissive power.
What is meant by absorptivity, reflectivity and
transmissivity?
Define the terms:
Blooms
Taxonomy
Level
Understand
Understand
i. absorptivity ii. reflectivity and
iii. transmissivity.
Understand
4
5
6
7
Distinguish between specular and diffuse reflections
Derive Stefan-Boltzmanns law from Plank’s Law
What does radiation shape factor mean?
Define irradiation and radiosity.
8
Enumerate the factors on which the rate of emission of
Remember
radiation by a body depends?
A black body at 3000 K emits radiation. Calculate the
following:
9
i)
ii)
iii)
iv)
v)
Understand
Understand
Remember
Understand
Monochromatic emissive power at 7 m wave length.
Wave length at which emission is maximum.
Apply
Maximum emissive power.
Total emissive power,
Calculate the total emissive of the furnace if it is
assumed as a real surface having emissivity equal to
0.85.
10
Two black square plates of size 2 by 2 m are placed parallel
to each other at a distance of 0.5 m. One plate is maintained
at a temperature of 1000C and the other at 500C. Find the Apply
heat exchange between the plates.
11
Two parallel plates of size 3 m  2 m are placed parallel to
each other at a distance of 1 m. One plate is maintained at a
temperature of 550C and the other at 250C and the
emissivities are 0.35 and 0.55 respectively. The plates are
located in a large room whose walls are at 35C. If the plates
located exchange heat with each other and with the room, Apply
calculate.
1. Heat lost by the plates.
2. Heat received by the room.
12
(a) Two parallel black plates 0.5m by 1.0m are separated by
0.5m distance. One plate is at 11000C and the other at Apply
6000C. What is the net radiant heat exchange between the
two plates?
(b) Calculate the shape factor for a hemispherical surface
closed by a plane surface.
13
Two large parallel planes having emissivities of 0.25 and 0.5 are
maintained at temperatures of 1000 K and 500 K, respectively. A
radiation shield having an emissivity of 0.1 on both sides is
placed between the two planes. Calculate
Apply
(a) the temperature of the shield.
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(b) the heat-transfer rate pe r unit area with the presence of
the shield
Two opposed, parallel infinite planes are maintained at
4000C and 4600C respectively. Calculate the net radiant
Apply
heat flux between these planes if one has an emissivity of
0.6 and the other an emissivity of 0.4.
Two parallel black plates 0.5m × 1.0m are separated by
0.5m distance. One plate is at 1100 0C and the other at 600
Apply
0C. What is the net radiant heat exchange between the two
plates?
Two large parallel planes having emissivities 0.3 and 0.5 are
maintained at temperatures of 9000C and 4000C
respectively. A radiation shield having an emissivity of 0.05 Apply
is placed between the two planes. Estimate Heat exchange
per m2 of area if the shield were not present.
Marri Laxman Reddy Institite of Technology and Management
Mechanical Engineering
Industrial Management
Faculty – B Ganga Naga Saroj
Unit-5
1 Define HRM.Write differences between HRM and personnel Management.
2 Describe Differences between HRM and HRD.
Understanding
Understanding
3 Explain functions of HR manager.
Understanding
4 Describe Recruitment procedure in Detail.
Understanding
5 Explain Selection concept in detail.
Understanding
6 Explain Manpower planning procedure concept in detail.
Understanding
7 Explain Training Methods in detail.
Understanding
8 Define placements? Explain types of promotion.
Understanding
9 Write about Wage and salary administration concept in detail.
Understanding
10 Write about Performance management methods.
Understanding
11 Explain Job evaluation concept.
Understanding
12 Compare the Differences between job Evolution and Merit rating
Understanding
13 Outline HRM practices of Any MNC.
Understanding
14 write the differences between Training and Development.
Understanding
Unit-6
1.
a) From the following prepare a statement showing the different stages of crashing
& the
corresponding cost estimate, assuming that the project has a fixed
overhead cost of Rs 600 per day.
(b) Find out the optimum duration & cost for the project.
Marri Laxman Reddy Institite of Technology and Management
jobs
Normal
time
1-2
3
1-3
6
2-3
9
2-4
7
3-4
3
(2) Find the critical path.
ACTIVITY
Normal cost
(Rs)
10000
6000
9000
5000
3000
Crash
time
2
3
3
4
2
Crash cost
Application
11000
8400
12000
7800
3400
PRECEDING
DURATION
Application
DAYS
A
--------6
B
--------5
C
A
4
D
B
4
E
B
4
F
C,D
6
G
E
6
(3) A small project is composed seven activities .the time estimated of listed in
the table below
ACTIVITY
OPTIMISTIC
MOST LIKELY
PESSIMISTIC
1-2
1-3
1-4
2-5
3-5
4-6
5-6
3
2
6
2
5
3
3
9
5
12
5
11
6
9
15
14
30
8
17
15
27
Application
(a) Find the expected duration and variance of each activity.
b) Calculate the early and latest occurring time for each activity
4. What is Dummy activity.Expain its importance
Understanding
5.write about (a) Earliest Start Time
Understanding
(b) Latest Finish time
6.Write short notes on (a) Latest Finish time
time
7.Write about crashing concept in detail
(b) Latest Start
8.Write a short notes on (a) Overhead cost (b) Indirect cost
Understanding
Understanding
Understanding
UNIT-7
1 Define Stratgic Management.Explain its features.
Understanding
2 Criticize Stratgic management concepts in detail.
Understanding
Marri Laxman Reddy Institite of Technology and Management
3 Justify Stratgic management is only responsibility of Top-level
Management.
Understanding
4. Describe Stratgic Management process in detail.
Understanding
5.Summarize SwoT concept in detail.
Understanding
6.Illustrate Value chain analysis concept.
Understanding
7.Outine steps in strategy formulation and implementation.
Understanding
8.Explain Porter Generic strategies with suitable examples.
Understanding
9.Analyze Google Marketing Strategies in Detail.
Understanding
10.outline Importance of Strategic management concept to
Engineering Students.
11. Describe any MNC mission and vision statement in details.
Understanding
Understanding
UNIT-8
1
2
3
4
5
Illustrate MIS concept with Suitable examples
Write about End user computing
Explains Japanese JIT concept in detail
Summarize Total Quality Management With suitable examples
Outline Six sigma Concept in detail
6 Define capability Maturity Model.Expain process in detail
7 What is supply chain management .choose any company, explain its
SCM process
8
9
Understanding
Understanding
Understanding
Understanding
Understanding
Understanding
Understanding
Write about Enterprise resource planning in detail
Understanding
Explain performance management process in detail
Understanding
10 Business process outsourcing with suitable examples
Understanding
11Analyze Business Process Re-engineering concept
Understanding
12 What do you mean Bench marking. Explain its process
Understanding
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
III year II sem
REFRIGERATION AND AIR CONDITIONING
QUESTION BANK
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Question
UNIT-5
What are the advantages of Vortex tube over other refrigeration systems?
What are the various applications of thermoelectric refrigeration system
What are the various applications of stem jet refrigeration system
what are the limitations of steam jet refrigeration system
List out the various components of steam jet refrigeration system
Explain briefly about seeback effect
Define nozzle efficiency
Define Entrainment efficiency efficiency
Steam jet refrigeration installation is to deliver chilled water at the rate of
2300 kg per minute at 80c from supply water at 180c .Condenser
saturation temperature is 380c .Nozzle efficiency is 90%,entrainment
efficiency is 60% and diffuser efficiency is 78%.Quality of flash vapour is
0.97.The steam consumption for motive jet is 6500kg/hr estimate the
pressure of the dry and saturated motive steam.
Blooms
Taxonomy
Level
Understand
Apply
Apply
Understand
Remember
Understand
Understand
Understand
Apply
10
In a Steam jet refrigeration system dry saturated steam at 7 bar abs. Apply
pressure is supplied. The ash chamber temperature is 50C, the condenser
temperature is400C,make up water is supplied at 200C. Assuming that
quality of motive steam and ash vapour at the beginning of compression
as 93% dry and efficiency of the
nozzle, efficiency of entertainment and the efficiency of the thermocompressor as90%; 65% and91% respectively. Determine:
(a) Weight of steam required per hour per ton of refrigeration.
(b) The volume of vapour removed from the ash chamber per hour per
ton of refrigeration.
11
Explain with neat sketch, the working of a steam jet refrigeration system .
12
In a Steam Ejector refrigeration system dry saturated steam at 6 bar abs. Apply
pressure is supplied. The ash chamber temperature is 50C, the condenser
temperature is 350C,make up water is supplied at 180C. Assuming that
quality of motive steam and ash vapour at the beginning of compression
as 92% dry and efficiency of the
Understand
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
nozzle, efficiency of entertainment and the efficiency of the thermocompressor as 89%; 64% and 90% respectively. Determine:
(a) Weight of steam required per hour per ton of refrigeration.
(b) The volume of vapour removed from the ash chamber per hour per
ton of refrigeration.
13
A steam Ejector water vapour refrigeration system is supplied with
motive dry saturated stem at 6 bar.It expands through the nozzle down to
flash chamber pressure meant to chill water at 50c. nozzle, efficiency of Apply
entertainment and the efficiency of the thermo-compressor as 92%; 60%
and 75% respectively. Determine:1.Ammount of water to be
evaporated,and motive steam per tone of cooling. 2.Tonnageof the plant
for 2 kgs/s of evaporation of water.3.c.o.p
Assume the condensing temperature to be 360C and make up water
temperature as 300C.
14
15
16
Explain the working principle of vortex tube refrigeration system
Understand
Explain the working principle of Thermo electric refrigeration system
Understand
Steam jet refrigeration installation is to deliver chilled water at the rate of Apply
2100 kg per minute at 70c from supply water at 170c .Condenser
saturation temperature is 370c .Nozzle efficiency is 91%,entrainment
efficiency is 65% and diffuser efficiency is 77%.Quality of flash vapour is
0.96.The steam consumption for motive jet is 6400kg/hr estimate the
pressure of the dry and saturated motive steam
Sl.
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Question
UNIT-6
Write a short note on the by pass factor of the heating coils
What is a sling psychrometer? Make a neat sketch and explain its use.
Define Dry bulb temperature and wet bulb temperature
Define specifi humidity and relative humidity
Define Dew point temperature and Apparatus dew point temperature
Explain briefly about sensible heating and cooling
Explain briefly about Humidification and Dehumidification
Define ventilation air & infiltration air
Blooms
Taxonomy
Level
Understand
Understand
Understand
Understand
Understand
Understand
Understand
Understand
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
9
A sling psychrometer reads 440C dry bulb temperature and 300C wet bulb
temperature. Calculate the following:
i. Specific humidity
ii. Relative humidity
Apply
iii. Vapour density in air
iv. Dew point temperature
v. Enthalpy of mixture per kg of dry air.
10
Twelve grams of moisture per kg of dry air is removed from atmospheric
air when it is passed through an air-conditioning system and its
temperature becomes 270C. The atmospheric conditions are 440C DBT
and 64 % R .H.
Find the following:
i. Relative humidity ii. Specific humidity
List out various psychometric process and Explain briefly?
The readings from sling psychrometer are as follows:
DBT: 270C,WBT: 200C,atm pressure:101.325kpa
Using steam tables determine:1.DPT;2.Relative humidity; 3.Specific
humidity; 4.Degeree of saturation
The specific humidity of atmospheric air at 270C DBT and atm pressure is
0.016 kg/kg of dry air.Determine;1.vapour pressure;2.relative
humidity;3.specific humidity
For a sample of air having 220C DBT,relative humidity 30% of
barometric pressure of 760 mm of hg,calaculate:1.vapour
pressure,2.Humidity ratio;3.Enthalpy;4.Vapour denisity
In a heating applications, moist air enters a steam heating coil at
100C.50%RH and leaves at 300C.Determine the sensible heat transfer,if
mass flow rate of air is 100 kg of dry air per second.
Ten grams of moisture per kg of dry air is removed from atmospheric air
when it is passed through an air-conditioning system and its temperature
becomes 260C. The atmospheric conditions are 400C DBT and 60 % R .H.
Find the following:
i. Relative humidity ii. Specific humidity;3.Enthalpy
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No.
1
Question
Apply
Remember
Apply
Apply
Apply
Apply
Apply
Blooms
Taxonomy
Level
UNIT-7
Why ventilation is required? Explain different ventilation standards for Understand
different purposes are recommended?
MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Define the “human comfort”, and explain the factors which affect the
human comfort.
Define comfort temperature what are the various factors governing the
comfort temperature?
Explain briefly about Industrial air conditioning
Explain briefly about Comfort air conditioning
What is meant by SHF? Explain briefly?
Explain Various methods used for calculating ventilation air
Explain Various methods used for calculating Infiltration air
Explain the comfort chart with the help of neat sketch?
An air conditioning room is maintained at 270c DBT and 52%R.H.The
sensible heat load of the room is 27k.w and room SHR is 0.8 Determine
i. Room latent heat gain
ii. The apparatus dew point temperature
iii. The air supply to the room in m3/min, if it is supplied to room at dew
point temperature.
Understand
5000 m3 of air at 15oC and in fully saturated condition enters into a room.
The sensible and latent heat loads are 72000 kJ/hr and 32000 kJ/hr
respectively. What condition of the air will be maintained in tile room?
An air conditioning plant is required to supply 60 m3 of air per minute at a
DBT of 210 and 55% RH.The out side air is at DBT of280c and 60%
RH.Determine the mass of water drained and capacity of the cooling
coil.Assume the air condition plant first to dehumidify and the cool the
air.
Following data refers to an air conditioning system to be designed for an
industrial process for hot wet climate:
Out conditions =300C DBT and 75% RH required inside conditions
=200C DBT and 60% RH.
The required conditions is achieved by first by cooling and dehumidifying
and then by heating. If 20 m3 of air is absorbed by the plant every 20
minute, find1. Capacity of cooling coil in tons of refrigeration;2.Capacity
of heating coil in kw,if surface temperature is 350C
Define effective temperature? What are the various factors governing the
effective temperature
The dry bulb and dew point temperature of air are 220C and 150C and its
pressure is 73 mm of hg.find 1.partial pressure of water vapour;2.specific
humidity;3.Enthalpy of air.
4000 m3 of air at 18oC and in fully saturated condition enters into a room.
Apply
Understand
Understand
Understand
Undestand
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MARRI LAXMAN REDDY
Institute of Technology & Management
(Approved by AICTE, New Delhi & Affiliated JNTU,
Dundigal, Quthbullapur (M), Hyderabad-500043.
The sensible and latent heat loads are 70,000 kJ/hr and 30,000 kJ/hr
respectively. What condition of the air will be maintained in tile room?
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Question
UNIT-8
List out various Air conditioning systems
What is the difference between fan and blower
List out various filters used in air conditiong
Discuss the common consideration for humidification of air in air
conditioning
Write the help of a neat diagram, explain the function of impact type
humidifier?
List out various heat pump circuits?
Discuss the common consideration for Dehumidification of air in air
conditioning
Explain briefly about heat pump
Explain the summer air conditioning system with the help of neat sketch
Explain the Winter air conditioning system with the help of neat sketch
Explain the Air to Air Heat pump with the help of neat Sketch
Explain the Air to Air Heat pump with the help of neat Sketch
What are different methods of air cleaning? Explain in detail.
Blooms
Taxonomy
Level
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14
Draw a neat diagram of constant volume induction system of air
conditioning and explain its working. List out its merits over other
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systems.
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16
State the three common methods to accomplish humidification.
State the three common methods to accomplish dehumidification.
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