OPERATIONAL LEVEL – ENGINE
REPUBLIC OF THE PHILIPPINES
DEPARTMENT OF TRANSPORTATION
MARITIME INDUSTRY AUTHORITY
STCW OFFICE
GUIDE QUESTIONNAIRES
for seafarers
The Annual Publication of Database of Questionnaires is mandated in Republic Act
10635 or the Act Establishing the Maritime Industry Authority (MARINA) as the Single
Maritime Administration Responsible for the Implementation and Enforcement of
the 1978 International Convention on Standards of Training, Certification and
Watchkeeping for Seafarers, 1978, as amended and International Agreements or
Covenants related thereto and its Implementing Rules and Regulations.
These sample questions have been reviewed and validated by our respective Board
of Examiners which may serve as a guide for the review of aspiring Marine Deck and
Engineering Officers, towards the successful completion of the Theoretical
Examination.
The following sample questions do not reflect the actual set of database of questions
given during the theoretical examination. Examinees are encouraged to study the
contained sample questions and probable answers as they are intended to give an
indication of the format and difficulty level of the theoretical examination.
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anytime at your convenience. Please consider the environment before printing.
Thank you.
A Publication of the MARINA STCW Office
OPERATIONAL LEVEL – ENGINE
FUNCTION 1 – Competence 5
1.
The ‘breaking-up’ of fuel as it enters a diesel engine cylinder is known
as_____.
2.
Which of the combustion parameters listed is used in a diesel engine,
but NOT related to the injection system?
3.
Air is normally bled from a diesel engine fuel system by_____.
4.
Which of the listed pumps discharges directly to the fuel oil settling tanks
of a diesel engine main propulsion plant?
5.
Air in the fuel lines to the fuel injection nozzles of a diesel engine will
cause the engine to_____.
6.
Differential needle valves used in fuel injectors are directly closed by
_________.
7.
The amount of fuel delivered by a unit injector is controlled by the
___________.
8.
Movement of the pump control rack in a fuel injection system using
individual plunger-type pumps_____.
9.
Movement of the pump control rack in a fuel injection system using
individual plunger-type pumps_____.
10.
When a nozzle tester is being used to test a ‘clock’ type fuel injection
nozzle, a clogged nozzle orifice will be indicated by a_____.
11.
The function of the window cast into the housing of an individual jerk
pump is to_____.
12.
A faulty injector in one cylinder of an operating diesel engine can be
located by_____.
13.
If one fuel oil strainer of a duplex unit becomes clogged while the vessel
is steaming at sea, the FIRST action should be to_____.
14.
Fuel injectors used in heavy fuel oil systems are usually provided with
cooling to reduce __________.
OPERATIONAL LEVEL – ENGINE
15.
Which of the fuel systems listed combines the injection pump and the
injection nozzle in one housing?
16.
The purpose of the interlocked three-way valve is to_____.
17.
A broken pintle in a fuel injector usually causes_____.
18.
Fuel injection systems are designed to primarily meter fuel, atomize fuel,
and______.
19.
Fuel injection pumps using the port and helix metering principle requires
the use of a______.
20.
A change in the degree of fuel atomization in a diesel engine cylinder
has the greatest effect on the______.
21.
Plugged spray holes in a diesel engine fuel injector will cause excessive
smoking at idling speed, in addition to _____________.
22.
When high firing pressures and low exhaust temperatures occur
simultaneously in a diesel engine, this may be a result of______.
23.
The minimum delivery pressure required for diesel engine fuel oil
injection depends primarily on the______
The primary function of a fuel delivery check valve assembly is to_____.
24.
25.
While overhauling a jerk-type fuel pump it is necessary to replace the
pump plunger. Which of the parts listed below must also be replaced?
26.
Regarding jerk-type fuel pumps as used on some auxiliary diesel
engines, the delivery cutoff point is controlled with a_____.
27.
Fuel oil penetration into the cylinder of a diesel engine is_____.
28.
The spray holes in diesel engine fuel valves should be cleaned using
carbon solvent and_____.
29.
The dripping of fuel from an injector nozzle after injection terminates
often results in______.
30.
The fuel injection pump, the position of the plunger would give
maximum_____.
OPERATIONAL LEVEL – ENGINE
31.
The principal hazard to personnel when using a diesel engine fuel
nozzle tester is_____.
32.
Injection pressure in a common rail fuel system is controlled by______.
33.
Viscosity of fuel in the atomizer can be reduced by_________.
34.
Carbonization in the surface of the fuel oil heater will reduce the heating
capacity because the________________________.
35.
What is the theoretical lift of a pump handling fresh water at atmospheric
pressure?
36.
What equipment is required when processing bilge slops for overboard
discharge?
37.
What will result in the fuel heaters if fuel oil is heated excessively high?
38.
A hydraulic system gear pump being fed from a reservoir frequently
indicates signs of excessive pitting after two months of service. Which of
the following would most likely contribute to this condition?
39.
Setting the relief valve opening pressure in a hydraulic system lower
than the required operating pressure will result in _______.
40.
Tubing is sized by_________.
41.
The flame screens installed on sewage system tank vents prevent
explosions by ________.
42.
The ability of lubricating oil to resist viscosity changes during
temperature changes is indicated by the________.
43.
What is used as a joining material for fresh and sea water pipes and also
for water lubricated bearings?
44.
An emergency bilge suction is required for________________.
45.
If you attempt to tighten a leaking hydraulic fitting with pressure on the
system, you will _____.
OPERATIONAL LEVEL – ENGINE
46.
If one of the bilge system manifold valves does not properly seat,
the__________.
47.
Heat exchanges used in distilling plants include air ejectors, condenser,
feed water heater and a: ___________.
48.
Lint from cleaning rags can be harmful to hydraulic systems because the
lint _____.
49.
The harmful effect of sulfur present in the boiler fuel oil is that it
___________.
50.
Water ballast placed in a tank that has been crude oil washed, but not
water rinsed, shall be regarded as _________.
51.
What do next after adding grease to a ball bearing with a hand held
grease gun?
52.
When securing a centrifugal type distillate pump, which of the listed
steps should be carried out first?
53.
Before doing any work on a hydraulic system equipped with
accumulators, you should________.
54.
A leak of intake valve of 2 - stage compressor at the 2nd stage will
cause high ______________.
55.
The minimum delivery pressure required for diesel engine fuel oil
injection depends primarily on the ___________.
56.
Fuel oil penetration into the cylinder of a diesel engine is ___________.
57.
Which of the following statements represents the proper relative
direction of flow through a globe valve?
58.
The possible cause why a lube oil pump fails to build up discharge
pressure could be that the______________.
59.
In a two stage flash evaporator, heated feedwater is vaporized in
the_________.
60.
The purpose of an air compressor unloading device is to________.
OPERATIONAL LEVEL – ENGINE
61.
After the installation of new impeller wear rings, by pressing them onto
the pump impeller hub, it is advisable to_____.
62.
Heating the oil makes the oil_____________.
63.
When maintenance is undertaken at sea, the engine personnel shall
take precaution to ___________.
64.
When vessel is underway, a small amount of water is allowed to leak
through the stem stuffing box in order to _______________.
65.
The characteristic that determines the temperature to which fuel must be
heated for proper atomization is __________________.
66.
Which of the following precautions should be observed concerning the
introduction of a fire resistant fluid into a hydraulic system?
67.
A good quality oil used in main propulsion engine lubrication systems
should be _____________.
68.
Foot valves are primarily designed to _____.
69.
In a centrifugal pumps operating with a high suction lift, foot valves are
primarily designed to______.
70.
A connection between bilge and ballast line must be made by installing a
______.
71.
The construction of the main propulsion engine lube oil sump tank
should _______.
72.
The final heating of the feedwater in a flash type distilling plant is carried
out by______.
73.
A diesel engine fuel leak in high-pressure fuel pipe between the injection
pump and fuel nozzle needs immediate repair because of
the___________.
74.
Fuel supplied by each unit injector on a two-stroke/cycle single acting
diesel engine is directed into each cylinder at a very high pressure
through the ___________.
OPERATIONAL LEVEL – ENGINE
75.
Very small irregularities on the seat and disk of a globe valve may be
manually repaired with the valve in place by the process known as
_____________.
76.
The combustible element in fuel that could cause major air pollution is
_______.
77.
As routine maintenance, the bilge manifold valves are periodically
removed and examined. Prior to re-securing the valve bonnets, the
valve _____. I. disks and seats should be checked and lapped if
necessary II. Bonnet, flange gaskets should be renewed if they were cut
or torn III. stem packing should be renewed if the packing has hardened,
the glans have bottom out, or the glands cannot be tightened
78.
When assembling a run of liquid service piping, which of the following
factors should be considered? I. How the type of fittings used will affect
the flow II. What type of gasket material should be used III. What radius
should be used for each bend in the run
79.
Which of the following centrifugal pump components converts the liquid
velocity to pressure?
80.
A filter used in a multi-operation hydraulic system would most likely to be
located _________.
81.
The injection pressure of a hydraulic fuel injection nozzle can be
increased by _______.
82.
Zinc anodes are installed in a marine raw-water cooling system to
_____________.
83.
What is the portion of a hydraulic hose that determines its overall
strength?
84.
Which are the most harmful slag forming compounds found in fuel oils?
85.
What is the significance of ash content in fuel oil to marine engineers?
86.
What happen when you heat the oil?
87.
Which of the following statements best describes oil lubricated stern tube
bearing installation?
OPERATIONAL LEVEL – ENGINE
88.
To correctly identifies the position of the journal when the shaft is
______.
89.
The longer the ignition delay period resulting from improper use of low
certain fuel, the ________.
90.
Hydraulic pumps most commonly used in steering systems are of the
__________.
91.
An oil fog lubrication system is recommended for______.
92.
Which of the following states the desirable property of boiler fuel oil?
93.
An O-ring seal in a hydraulic system will begin to leak when it has lost its
interference fit due to____.
94.
The cause of carbon deposits in the fuel heater is___________.
95.
Cylinder lubrication oil for low speed main propulsion diesel engine is
admitted to each cylinder during ______________.
96.
One of the main functions of wear rings, as used in centrifugal pumps is
to _________.
97.
In the majority of marine power plants, the fuel oil heater installations are
divided into several units because_________.
98.
If a centrifugal bilge pump were continually operated with the discharge
valve closed the____________.
99.
What instrument or process determines the BTU value of boiler fuel oil?
100. Which of the following actions should be taken FIRST if a bilge-well of a
multiple suction bilge system is unable to be pumped out?
101. The first step when beginning to set the slide valves on a duplex
reciprocating pump is to _____ .
102. The significant element contained in fuels that determines the specific
heat is ___________________.
103. If the capacity of a centrifugal pump decreases gradually over a long
period of time, you should replace the _____ .
OPERATIONAL LEVEL – ENGINE
104. Uneven bolt tightening during installation of a fuel injection pump could
result in __________.
105. In order to properly remove air from the casing of a centrifugal pump
when starting, the pump should have a_____.
106. Before performing any maintenance on a hydraulic system storing
energy in an accumulator, you should _____.
107. Strainer is commonly used in hydraulic system in order to _________.
108. A centrifugal pump requires priming____________.
109. How often should cargo oil pump relief valves on tank vessels be tested
?
110. If you are operating a centrifugal water service pump with worn wear
rings, the____.
111. Which of the listed pumps is not a positive displacement pump?
112. Greases are generally produced by ____.
113. After installing a new hydraulic pump in a system, what special attention
should be given to the hydraulic system?
114. The rate of heat transfer between the hot and cold fluids passing through
a shell-and-tube type heat exchanger will _____.
115. The by-products of oxidation, as a result of water contamination of
hydraulic oil, are generally _____.
116. Valves used in the machinery space piping systems, and constructed
with threaded valve systems, must be _____.
117. The alignment of coupling faces of pump and electric motor can be
checked by _____________.
118. Which of the listed conditions can lead to cavitation in a centrifugal
pump?
OPERATIONAL LEVEL – ENGINE
119. The arrangement of the __________ is applicable to any ship in such
way that any compartment can be discharged of water when the ship is
on an even keel.
120. What component is used to thoroughly separate small particle
contamination from hydraulic fluid?
121. Main propulsion engine lube oil sumps should be constructed
_________.
122. To avoid oil from discharge into the sea when ballasting
_______________.
123. When securing a distillate pump on a low pressure fresh water
evaporator, which of the listed steps should be carried out first?
124. Tube scaling in heat exchangers causes the heat transfer rate to
decrease because the _____.
125. While the oily-water seperator is operating in the processing mode, if a
low vacuum, what is the probable cause?
126. If the foundation bolts of a reciprocating air compressor are loose, which
of the conditions below will occur?
127. The amount of fuel injected into a diesel engine cylinder by a unit
injector, is controlled by ___________.
128. The size of flexible hose used in hydraulic system is indicated by ____.
129. Gate valves should not be used for throttling as __________.
130. During the repair and overhaul of the pump relief valve used in a
hydraulic system, the set point was reduced by 10 bars, which of the
following statements describes the result of the set point being lowered?
131. What happens when oil is heated?
132. Which of the following conditions is most likely to cause water hammer in
the potable water system?
133. Demulsibility of a lube oil is defined as _________________.
OPERATIONAL LEVEL – ENGINE
134. The emergency bilge suction valve is typically used____________.
135. What control valve listed is NOT considered to be hydraulic system
directional control valve?
136. An important point of consideration when replacing a dry type intake
filter on an air compressor is to____.
137. Accidental flooding of the engine room bilges through the bilge system is
prevented by______________.
138. If the chemical analysis of a lube oil sample taken from the main
propulsion machinery indicates an increased neutralization number the
_______.
139. Assuming oil and water flow rates remain the same, what would be the
effect of scale formation occurring on the inside of the cooling water
tubes of a lube oil heat exchanger?
140. The viscosity of fuel oil is indicated by its____________.