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MANAGEMENT – 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. You may access these guide questionnaires with your smart gadgets anywhere and anytime at your convenience. Please consider the environment before printing. Thank you.
A Publication of the MARINA STCW Office
MANAGEMENT – ENGINE
FUNCTION 1 – Competence 3 1. A seven cylinder, two-stroke/cycle, single acting diesel engine with a
cylinder indicated horsepower calculated as 1350 kW and brake horsepower measured at 7466 kW. What is its mechanical efficiency?
2. What is usually measured in seconds redwood or degrees angles from a
measurement using standard apparatus in which a given quantity of the fuel oil is run through a standard orifice at a given temperature?
3. The cold storage room for meat shall be maintained at _______. 4. Which device maintains systems pressure by compensation and shock
absorption? 5. Which of the following statements is true concerning the water level
indicating devices used with an auxiliary boiler? 6. Modern day boiler automation allows bypassing the flame safeguard
system to permit a burner to have a trial for ignition period during burner light-off. This period may not exceed ______.
7. To effectively limit the load of diesel engines, which of the following
components below must governors be equipped with? 8. Setting the relief valve opening pressure in a hydraulic system lower
than the required operating pressure will result in_____. 9. If one hydraulic pump of an electro-hydraulic steering unit fails, the
vessel’s steering can be initially and best maintained by using the ______.
10. The component which is used to thoroughly separate small particulate
contamination from hydraulic fluid is a/an_____. 11. Fuel injection systems meter fuel, atomize fuel and ____________. 12. Where is the degree of fuel oil atomization dependent upon? 13. If there is a change in the degree of fuel atomization in a diesel engine,
what could be greatly affected in the combustion process?
MANAGEMENT – ENGINE
14. New piping and tubing to be installed in a hydraulic system can be safely degreased by using_______.
15. If the fires in a steaming boiler have been extinguished accidentally, you
should not relight any burner until_____. 16. What do we call the storage tank for liquid refrigerant? 17. Overheating of the oil in a hydraulic system can be caused by
_______________. 18. The bourbon tube-type pressure gage will begin to straighten out when
pressure is applied due to the ____. 19. In normal condition, when do you start operation of the fresh water
generator? 20. At what RPM percentage should the compressor side of the turbo
charger be washed? 21. When does the highest pressure in a diesel engine cylinder normally
occur? 22. A solenoid valve in the boiler fuel oil supply line will close when the
____________. 23. Which device can be used to secure or hold furnace refractory in
position? 24. Two-element feed water regulators operate by sensing _____. 25. What is the most probable cause if the gage glass water level remains
constant in a steaming boiler while maneuvering? 26. Failure of the burner flame in an automatic auxiliary boiler would
probably be a result of __________. 27. How a vacuum is initially created in a flash type distilling plant? 28. What is the most effective method in removing water from diesel fuel oil? 29. How is the vessel's steering initially and best maintained if one hydraulic
pump of an electro-hydraulic-steering unit fails?
MANAGEMENT – ENGINE
30. Diesel engine cylinder head test cocks are used to _____________. 31. Which of the listed operational checks should be continuously made on
the main propulsion reduction gears? 32. Before starting a diesel engine, you should always _____________. 33. Which of the following actions listed below, should be taken if the water
gage glass on a steaming boiler breaks? 34. What control procedures must be done before putting into operation a
steam driven cargo pumps? 35. As engine RPM is increased from idle speed to full load speed, which of
the conditions listed will decrease? 36. In the event of a failure of the pneumatic control system, a multi-element
feed-water regulator is designed to operate as a _____________. 37. When there is an increase in load on your boiler, what is needed to
attain a good combustion? 38. Operating a propulsion diesel engine at less than 30% of designed
normal load for prolonged periods will result in _____________. 39. Before opening any part of refrigeration system for maintenance, what
precaution must be taken? 40. What do you call a procedure where main systems such as propulsion
system, electric power generation, steering gear, cargo handling systems, fire systems and auxiliary systems is subjected to a comprehensive testing program to verify the actual condition versus the design condition?
41. One of the main differences between the various types of screw pumps
is in the ________ . 42. Which device converts hydraulic and pneumatic energy into mechanical
working energy? 43. Oil mist detector is used to detect an oil mist formation in the engine
crankcase caused by _________.
MANAGEMENT – ENGINE
44. Thermostatic steam pressure reducing valves are used in the fuel oil
service system to control the ____________. 45. When fuel oil heaters are required for main engine operation,
_______________. 46. On tank vessels equipped with power operated cargo tank valves, the
type of power actuator most commonly used is __________. 47. Helical gears are preferred over spur gears for reduction gear units due
to the fact that they _______. 48. Which of these is NOT an application of accumulator? 49. When the hydraulic control lever for deck winch is placed in the neutral
position, the spring set brake on the fluid motor drive shaft is ___________.
50. What is the purpose of after coolers in air compressors? 51. Information on the data-logger can be helpful in determining the long
term probability of machinery failure if you __________. 52. The purging point on some compressors in low pressure refrigeration
systems is connected to the ________. 53. In the vapor compression cycle of a closed system, after the liquid
refrigerant flows through the condenser it will then pass to __________. 54. A sulfite test is performed on water boiler to determine the amount of
__________. 55. What control procedures must be done before putting into operation a
steam driven cargo pumps? 56. Excessive side clearance between a piston ring and its groove will cause
the ring to____________. 57. Which of the following conditions listed below is responsible for the fuel
oil to atomize when using a steam atomizer in an auxiliary boiler?
MANAGEMENT – ENGINE
58. For a continuous operation of diesel engine, why is it that the use of a duplex filter unit would be the best arrangement?
59. The fuel oil meter in the fuel oil service system should be bypassed
when __________. 60. Which of these is known as normally open pressure control valve? 61. Excess air must be provided to an operating boiler to allow for
____________. 62. In water cooled stern tube, a slight leakage of water across the packing
gland is provided to _____. 63. What kind of damage will occur as a result of a serious leak in the air
ejector condenser assembly? 64. While attempting to read a tank level indicator, the mercury column
drops rapidly. What does this indicate? 65. If a burner were inserted too far into the boiler furnace, it would lead to
poor combustion and carbon deposits will be created at the ___________.
66. A turbocharger is an air compressor driven by__________. 67. What are the two most common gases used in pneumatic systems? 68. What is the indication of distortion on the spray pattern of a nozzle or
injector? 69. The solenoid valves in the fuel oil supply line to an automatically fired
auxiliary boiler are automatically closed by ____________. 70. The liquid refrigerant which is stored in the liquid receiver is at ______. 71. What is the most important property of lubricating oil for reciprocating air
compressor? 72. After a normal firing, you should check for a/an __________. 73. What is the device used to keep moisture from passing through the
system?
MANAGEMENT – ENGINE
74. What is an intense discrete frequency sound radiating from the propeller
and is much like a steady bell tone? 75. Which of the following is a kind of over speed trip that is fitted to the
engine? 76. Which of the following device is used to set the maximum pressure in a
hydraulic system? 77. What is/are the elements that control/s the desired temperature in the
outlet of a jacket cooling cooler through the bypass controller? I. Air II. Oil III. Electric
78. What is the indication of a bubble forming in the sight glass in the liquid
sight flow indicator of an R-22 refrigeration system? 79. What is the first alarm that will sound before the diesel engine stop due
to lube oil pressure? I. high pressure alarm II. cut - out pressure alarm III. low lube oil pressure
80. An air conditioning system with clogged filters will have which one of the
following conditions? 81. To ensure that a refrigeration unit will not start while undergoing repairs,
you should_____________. 82. Which of the listed operational checks should be continuously made on
the main propulsion reduction gears? 83. In order to start a large, low-speed, main propulsion diesel engine on
high viscosity fuel after an extended shutdown, the ________________. 84. In which of the listed hydraulic systems below will the installation of an
oil cooler be necessary? 85. What requirements have to be met to carry out a cold standby starting
on marine diesel oil? 86. If a severe leak develops in the electro-hydraulic steering gear, which of
the listed conditions could result?
MANAGEMENT – ENGINE
87. Which of the following is the most common cause of machinery
vibrations when the vessel is maneuvering? 88. After changing out the fuel filters, the diesel engine fails to restart. What
is the probable cause of this condition? 89. In order for microbiological growths to thrive in fuel tank, it is necessary
for _______________ . 90. How will you avoid acid corrosion of the economizer tubes when blowing
tubes? 91. Which of the following is operated from the main engine room console
on an automated ship? 92. In preparing the boiler for survey, it should be cooled down slowly and
when pressure gauge registers zero. Which of the following should be opened to avoid formulation of a vacuum?
93. A hydraulic fluid flow control circuit, controlling linear actuator speed
during extension with the pump operating at system pressure, is known as______.
94. Which of the combustion parameters listed below is used in a diesel
engine, but NOT related to the injection system? 95. Rotation of the steering wheel on the navigation bridge initiates oil
pressure being applied to the steering gear rams by _______. 96. The loss of efficiency thus an increase in absorbed power and a lower
speed is the result of the accumulation on the propeller by_____. 97. With regards to fluid flow control, an advantage of pneumatic control
systems over electrical control system is ___________. 98. When there is no movement of the rams on an electro-hydraulic steering
gear, the tilting box of the running pump is ______. 99. In sewage treatment, the term maceration refers to the process of
_____________ .
MANAGEMENT – ENGINE
100. Before opening any part of refrigeration system for maintenance, what precaution must be taken?
101. One function of burner atomization steam is to ___________. 102. The function of the hydraulic telemotor transmitter used in an electro-
hydraulic steering gear system is to ____. 103. What is the purpose of a restrictor valve as it is used in a hydraulic hatch
cover system? 104. A pneumatic pressure tank is installed in a sanitary system to
_____________ . 105. The fins on the tubes of a fin type fuel oil heater are provided to
_____________. 106. The flash chamber attached to the auxiliary boiler_____. 107. What is the purpose of turning a main propulsion diesel engine with the
cylinder test cocks open prior to starting? 108. The rate of the fuel injection in a diesel engine cylinder depends
primarily on ____________. 109. Excessive accumulation of carbon deposits on a boiler burner throat ring
and diffuser could result in ______. 110. What is the highest steam temperature to which fusible plugs may be
exposed? 111. The air supplied to the cylinders by a turbocharger is often reduced in
volume by a/an_____. 112. Where is fusible plug installed on a scotch or auxiliary boiler? 113. The constant capacity, pressure atomizing, fuel oil burners designed to
meet a wide variation in the steaming loads of an auxiliary boiler are_____.
114. Which type of pump is typically used to supply fuel to a unit type auxiliary
boiler?
MANAGEMENT – ENGINE
115. An auxiliary boiler equipped with a return flow fuel atomization system, has a_____.
116. An auxiliary boiler is equipped with a return flow fuel atomization system,
which uses _____. 117. The burner assembly on an automatically fired auxiliary boiler fitted with
variable capacity, pressure atomizing burners, maintains steam pressure by_____.
118. What is the function of the after-coolers installed in the diesel engine air
intake system? 119. The concentration of total dissolved solids in the water of an auxiliary
boiler can increase as a result of_____. 120. The variations in the amount of fuel oil burned in the operation of an
auxiliary boiler, utilizing a return flow type atomization system, is a function of the_____.
121. The tube sheets in a fire –tube auxiliary boiler are normally connected
by_____. 122. Which of the diesel engine components listed increase air density and
helps to improve engine operating efficiency? 123. The rate of heat transfer in a water-tube auxiliary boiler can be increased
by_____. 124. Which of the following statements about a coil-type forced circulation
auxiliary water-tube boiler is correct? 125. In a coil-type forced circulation auxiliary water-tube boiler,_____. 126. In an auxiliary boiler steam and water system, the highest pressure is in
the_____. 127. The concentration of dissolved solids in the boiler water of an auxiliary
boiler could increase as a result of_____. 128. How is down-comers installed on auxiliary package boilers protected
from direct contact with host gases?
MANAGEMENT – ENGINE
129. Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?
130. How is the concentration of dissolved oxygen in the feed-water of an
auxiliary boiler maintained at acceptable limits? 131. A seven-cylinder, 2-stroke/cycle, single acting diesel engine has a 750
mm bore and a 2000 mm stroke. What indicated power will be developed if the average mean effective pressure is 14.8 kg/cm2 at a speed of 96 RPM?
132. A diesel engine indicator diagram measures 12.5 cm in length and has
an area of 22 cm2. What is the cylinder mean effective pressure if the spring used has a scale of 1.25 mm equals 1 kg/cm2?
133. A diesel engine indicator diagram has an area of 22 cm2 and a length of
12.5 cm. If the scale of the indicator spring is 1 mm = 1 kg/cm2, what is the cylinder mean effective pressure?
134. Economy and efficiency in the operating of a marine boiler have
traditionally been characterized by _____. 135. A knocking sound from one cylinder of an operating air compressor
indicates 136. Which of the listed fuel oil ignition methods are commonly found on
automatically fired auxiliary boilers aboard merchant vessels? 137. The exposed portion of the outboard propeller shaft is protected against
seawater corrosion by___________ .
138. A refrigeration system compressor crankcase is sweating or unusually cold. This is an indication of
139. In a low pressure air compressor, the loss of volumetric efficiency
normally results from__________. 140. How will you operate a centrifugal fire pump at reduced capacity? 141. Blisters developing on boiler tubes can be caused by _________. 142. How is the speed of a radial piston hydraulic motor controlled?
MANAGEMENT – ENGINE
143. Which condition indicates the air side fouling of an after-cooler on turbocharged diesel engine?
144. Why are some main diesel engines vibrating at a certain RPM? 145. To obtain the best mixing of air and fuel with a fuel oil atomizer, you
need to adjust the ________. 146. Which of the following factors tends to increase scale formation on the
saltwater side of a heat exchanger used in a diesel engine cooling water system?
147. Where is the charging valve of a refrigeration system located? 148. The most important parameter for a marine diesel engine is the rating
figure usually stated as ________. 149. Compressed air to operate air powered tools is supplied by __________. 150. In most installations, the firing rate of a boiler using steam atomization is
indicated by the ________. 151. What may cause white smoke exhausting from an operating diesel
engine? 152. How do we maintain constant steam pressure? 153. What is the purpose of an exhaust gas bypass installed on a waste heat
boiler? 154. Which of the following procedures should be carried out to permit the
continued operation of a crosshead engine with a leaky after-cooler? 155. In a boiler furnace, incomplete combustion due to insufficient air yields
an excess amount of _______. 156. If the discharge valve is closed before the drive motor is stopped, which
of the following types of pumps will most likely be damaged? 157. How is the designed capacity of a centrifugal pump being maintained? 158. What does the indicator card or pressure-volume diagram show?
MANAGEMENT – ENGINE
159. The purpose of separating nozzle in the accumulator of a water-tube, coil type, steam generator is to separate_____.
160. What condition of an inlet manifold pressure does a turbocharged diesel
engine have in relation to the load? 161. Corrosion and grooving on the blading of an exhaust driven turbocharger
is caused by certain components of residual fuel oils. These components are vanadium, sodium, and _____.
162. If crank web deflection readings are positive, what does this indicate? 163. If fuel injection to a four-stroke/cycle diesel engine begins earlier than
designed, why is ignition maybe delayed? 164. When a diesel engine compression pressure is checked, where is the
indicator connected? 165. If the speed of a turbocharged diesel engine is maintained constant, the
turbocharger speed will _______. 166. Waterside grooving is usually very difficult to locate in a boiler tube
before leakage occurs because _______. 167. Which of the following describes a characteristic of scale forming
impurities in boiler water? 168. Which of the following is used for bilge systems, evaporators and gas
freeing systems on tanks? 169. What is a low cylinder compression pressure and a high exhaust
temperature indicate from among the choices? 170. On a turbocharged, medium –speed, diesel engine, which of the
following problems is an indication of a restricted air intake passage? 171. The speed of the turbocharger for a four-stroke/cycle diesel engine
driving a generator at constant speed depends on the _______. 172. What statement is correct pertaining to Oily Water Separator, OWS? 173. A diesel engine is warmed up and white vapor is noted in the exhaust,
what does this indicate?
MANAGEMENT – ENGINE
174. What can cause a combustion knock occurring in a diesel engine? 175. What indicates a sudden increase in lube oil pressure to the main
turbine? 176. All of the diesel cylinders firing pressures are normal, yet all of the
exhaust temperatures are low. Which of the following situations is responsible for this condition?
177. The pressure in an operating diesel engine cylinder continues to rise for
a short period after the piston passes top dead center as a result of the __________.
178. Which of the following conditions is responsible for the fuel oil to atomize
when using a steam atomizer in an auxiliary boiler? 179. What is a practical way of checking for excessive fuel injection in one
cylinder of an operating diesel engine? 180. Which of the listed conditions would indicate a dirty atomizer sprayer
plate? 181. Excess air must be provoked to an operating boiler to allow for _______. 182. The potable water piping systems in ships must be ____________. 183. What component of a diesel engine converts the linear motion of a
piston into the rotary motion required to drive gears, propeller shafts, and generators?
184. If a boiler is smoking a black and increasing the boiler front air box
pressure does not reduce the smoke, the cause can be ______. 185. A good quality oil used in main propulsion engine lubrication systems
should be________ . 186. What can cause black smoke exhausting from an operating diesel
engine? 187. If fuel injection occurs too early, a diesel engine will lose power for what
reason?
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188. The development of pinhole leaks where the boiler tubes enter the water
drums and headers may be evidence of _______. 189. What do pyrometers commonly found on diesel engine exhaust systems
consist of? 190. Ejectors are simple, reliable, inexpensive, effective and
______________. 191. The conical steel or composition cone installed on a propeller, known as
a fairwater cone, provides which of the following benefits? 192. What can cause white smoke exhausting from a diesel engine? 193. What is the sign of an early injection timing in a diesel engine? 194. Regarding main propulsion boilers, what condition would normally be
indicated if the bridge reported that white smoke was observed coming from the stack?
195. Which of the following statements is true concerning the overall
efficiency of air compressors? 196. A salinity indicating system functions on the basic principle of measuring
the __________. 197. Poor atomization accompanied by an elongated flame from a stem
atomization burner is most likely caused by _______. 198. Which of the following will have the greatest effect on the mean effective
pressure in a cylinder of a diesel engine operating at normal load? 199. An important point of consideration when replacing a dry type intake
filter on an air compressor is to______ 200. If the turbocharger of a four-stroke /cycle diesel engine fails to operate
properly, which of the following statements best describes the probable effect?
201. What will result in the longer ignition delay period resulting from the use
of low cetane fuel?
MANAGEMENT – ENGINE
202. When the relief valve opens it discharges high pressure refrigerant vapor to the____________.
203. Which of the following could result if there is late fuel injection in a diesel
engine? 204. In a diesel engine, late fuel injection is indicated by black or gray
exhaust smoke with ___________. 205. Late fuel injection in a diesel engine is indicated by low firing pressure.
What might be the other indication? 206. Late fuel injection in a diesel engine is indicated by low firing pressure.
What is the other indication? 207. White stack smoke from a main propulsion boiler could indicate
_______. 208. What will be the result of prolonged operation of a diesel engine closed
cooling sysetm with temperature lower than that of designated temperature?
209. On a steering gear system, what does the telemotor receiver unit
control? 210. On a steering gear system, what does the telemotor receiver unit
control? 211. What is the main operating characteristic of diesel engines that
distinguishes them from other internal combustion engines? 212. What is the purpose of the flywheel? 213. An operating turbocharged diesel engine that suddenly loses power, is
due to a/an _______. 214. What might cause the sweating of the crankcase of a refrigeration
compressor? 215. Diesel engine mufflers or silencers reduce the engine exhaust noise by
_______.
MANAGEMENT – ENGINE
216. What could influence the ratio of pressure rise during the period following initial fuel ignition in a diesel engine?
217. How is dissolved oxygen in boiler feed water minimized? 218. What maintains the crankshaft axial alignment on a large diesel engine
installation? 219. When associated with main propulsion diesel engines, shaker,
circulation, and spray are the three general methods used in __________.
220. A pneumatic pressure tank is installed in a sanitary system to
_____________. 221. What is the secondary function of a waste heat boiler? 222. What is the primary function of a waste heat boiler? 223. Which of the precautions listed should be taken prior to blowing down a
boiler water wall header? 224. In a pneumatic automation system, a unit producing a signal to govern
the position of the controller of the measured variable, relative to the value of the measured variable, is said to have ________.
225. The most rapid period of fuel combustion and cylinder pressure increase
in a diesel engine should begin just before the piston reaches top dead center and completed when?
226. What is the condition of a crankshaft whose center of gravity coincides
with its center line? 227. A diesel engine cooling water system with has pH of 3.0? What does this
indicate? 228. How can you reduce the formation of carbon monoxide in diesel exhaust
gases? 229. Which of the listed components is used to protect the boiler super-heater
against the radiant heat of the furnace?
MANAGEMENT – ENGINE
230. For equal amounts of fuel injected, what change in condition will have the greatest effect on the mean effective pressure in the cylinder of a diesel engine?
231. Why are large steam drums not required in the design of a coil-type
auxiliary water-tube boiler? 232. Which of the following statement is true concerning the main diesel
engine oil cooler? 233. What will happen to R-12 refrigerant system when there is an increased
in heat load? 234. Under normal operating conditions of constant load and combustion
rates, which of the following will occur when the amount of excess air to the furnace is increased?
235. Why are removable sleeves installed on centrifugal pump shafts? 236. How do lubricating oil and grease gets into the boiler water system? 237. Why should an exhaust gas bypass installed on a waste heat boiler? 238. Why should the main steam stop valve of an auxiliary boiler be eased off
its seat and then gently closed before lighting off? 239. Why is it desirable for an auxiliary boiler safety valve to pop open and
reseat firmly? 240. What is the purpose why, when conducting a hydrostatic test on a water-
tube auxiliary boiler the test water should be heated to a temperature of at least 70oF (21oC)?
241. What is the use of engine indicator on a diesel engine? 242. What is the purpose of sacrificial zinc anodes used on the salt water side
of diesel engine heat exchangers? 243. What is the function of a hydraulic telemotor transmitter used in an
electro-hydraulic steering gear system? 244. What is the importance of an oil mist detector in a main propulsion diesel
engine?
MANAGEMENT – ENGINE
245. What influenced the rate of pressure rise in a diesel engine cylinder
following fuel injection and ignition? 246. The greatest deterrent to heat transfer from the fireside to the waterside
of a boiler is _________. 247. Which of the following statements concerning the operation of a coil type
forced circulation auxiliary water-tube boiler is correct? 248. The formation of a pit in a boiler tube is most likely to occur when
_________. 249. The most rapid period of fuel combustion occurring in a diesel cylinder
should begin just before the piston reaches top dead center and ___________.