ESKI SORULAR VE ICINDE HAZIRLIK SORULARI BULUNMAKDA
DENİZCİLİK İNGİLİZCESİ
------------- is the first signal of lube- oil trouble.
A) Lube oil gravity tank low level alarm goes off
B) Low lube oil sump level
C) Low outlet temperature from lube oil coolers
D) No flow throught bull’s eye from gravity tank observed
E) A and B
The usual cause of crankcase explosions in diesel engines is not -----------------------
Heating lubricating oil
Overheating lubricating oil
Poor condition of the cylinder
Crank shaft bearing failures maintenance
Any above
-------------- is not one of the advantages of the open cooling system.
Being the simplest system
No requirement of heat exchange
Obligation of keeping engine cool
The requirement of only one water circulating pump
The requirement of 2 water circulating pumps
4.The TEV (thermostatic expansion valve) is located between:
A. The receiver and the king valve
B. The king valve and solenoid
C. Both A and B
D. The solenoid valve and evaporator
E. The charging valve and solenoid
5. Another name for the liquid valve is:
A. Master valve
B. King valve
C. Freon valve
D. Shut off valve
E. None of above
6. What is the high pressure side of the refrigeration system?
A. Compressor to condenser
B. Evaporator to compressor
C. Expansion valve to evaporator
D. Compressor to expansion valve
E. Evaporator
7. The low pressure side of a refrigeration system is from the:
A) Expansion valve to compressor
B) Compressor to expansion valve
C) Expansion valve to the evaporator
D) Condenser to the expansion valve
E) None of the above
8. The bulb for the TEV (thermostatic expansion valve) is located:
A. In the middle of the evaporator coils
B. Near the evaporator coil outlet
C. Near the evaporator coil inlet
D. On the bottom row of the evaporator
E. None of the above
9. The solenoid valve can be typed as a:
A. Thermal valve
B. Magnetic stop valve
C. Bellows valve
D. Bimetallic valve
E. Both C and D
10. What is the advantage of using a hydraulic starting system for an emergency diesel?
A. The system is inexpensive
B. High pressure lines are not required
C. It is compact
D. Faster cranking speeds are obtained
E. None of the above
11. What would cause white smoke after you just started the diesel?
A. Too week battery power
B. Water in the fuel
C. Water in the gas
D. Water in the oil
E. Salt water in cooling water
12. Pre combustion chambers in a diesel engine:
A. Require that each cylinder use two spray nozzles
Require the use of flat crowned pistons to obtain
turbulence
Permit the use of a wide range of fuel in that
engine
Contain all of the air charge at the end of the
compression stroke
Require that each cylinder use more than four spray
nozzles
13. The coils in the evaporator are attached to the header by:
A. Pipe nipples
B. Union type fittings
C. Welding
D. Bolted flanges
E. Both C and D
14. Cylinder liner are generally used on diesel engines because:
Liners may be easily replaced after the cylinder walls show wear
Liners provide a more efficient cooling system
Rubbing speeds are reduced through
the use of liners
Liners provide a better lubricating surface
E. None of the above
15. The dehydrator on a refrigeration plant is used to:
A. Add moisture to the system
B. Remove moisture from the system
C. Remove air from the system
D. Remove oil from the system
E. Both C and D
16. Regardless of the geographical location of on oil spill, you should notify the ------------------
A. Local police department
B. Local fire department
C. Corps of Engineers
D. Coast Guard
E. The pilot
17. ---------------is the principal hazard to staff when a diesel nozzle tester is in use is
A. Electrical shock
B. Toxic fumes
C. Explosion
D. Blood poisoning
E. Loosing consciousness
18. A “pneumercator” measures:
A. Oil pressure
B. Air level
C. Liquid level
D. Air pressure
E. Air temperature
19. What type of gauge reads pressure and vacuum?
A. Duplex
B. Simplex
C. Both B and C
D. Compound
E. Bourdon tube
20. Most gauges in the fire room are:
A. Manometers
B. Thermocouples
C. Dual purpose
D. Thermometers
E. Bourdon tube – type
21. The removal of contaminating impurities from lubricating oil will ......................
A. Increase engine wear
B. Decrease engine wear
C. Increase possible breakdowns
D. Decrease possible breakdowns
E. B and D
22. Cut out system on the aux boiler operates ................................
A) Low level alarm
B) Low low level alarm
C) High level alarm
D) High pressure alarm
E) Low pressure alarm
23. ---------------is the cause of burned exhaust valves
A. Overloaded cylinder
B. Poor combustion
C. Distortion and faulty reseating maintenance
D. Any above
E. A and B
24. When a cargo hose joint or coupling starts to leak badly the attempt you should do is to...
Reduce pressure and rag
leak securely
B. Shut down transfer and make repairs
C. Soak spill with sawdust and reduce
pumping pressure
Wash deck immediately and close tank
tops
E. Carry on transfer pumping
25. Water in the lube oil system may be detected by: I. sounding lube oil tanks with water sensitive paste; II. observing the purifier discharge.
A. I
B. II
C. I and II
D. Neither I nor II
E. None of above
26. Electrohydraulic steering units are protected from pounding forces (rudder shock) by:
A. Buffer springs
B. Follow up mechanism
C. Relief valves
D. Relieving gear
E. Steering pumps
27. Blue smoke coming from the diesel exhaust would indicate:
Excessive fuel consumption/unburned
fuel
B. Burning of lube oil due to possible blow-
by
C. Lean fuel/air mixture, too much air
D. Insufficient amount of fuel consumption
E. None of the above
28. The valve which is always partially open when the evaporator is in operation is the:
A. Vapor valve
B. Continuous blowdown valve
C. Bottom blowdown valve
D. Surface blowdown valve
E. Fresh water valve
29. Studs and nuts intended for use in main steam line flanges and fittings are marked with an “H” or a “T” to show they are:
A) Heat resistant
B) Hard finished
C) Half threaded
D) Corrosion resistant
E) Fire proof
30. The rotating part of a micrometer is the:
A. Anvil
B. Barrel
C. Frame
D. Thimble
E. Cover
31. An advantage of aluminum pistons compared to cast iron pistons is:
A. Greater high temperature strength
B. Greater weight per cubic meter
C. Increased resistance to wear
D. Low temperature strength
E. Better heat conductivity
32. Trunk type diesel engine pistons are most effectively cooled when heat is:
A. Radiated through the engine block
Mixed with lubrication oil
Conducted through the piston crown
D. Transferred to escaping exhaust gases
E. Transferred to water cooled cylinder
walls
33. Cavitation, the forming and bursting of vapor filled cavities or bubbles will result in ...........
A. A loss of thrust
B. Erosion of the blade surface
C. Vibrations in the afterbody of the ship
D. Noise
E. All above
34. When the oil in the seperator is decreasing, which place cannot be leaking?
A. Lower bearing casing
B. Drum shaft
C. Wormgear shaft bearing hosing
D. Middle ball bearing casing
The o-ring at shock water entrance to
seperator into shockwater
35. -------------should be regarded as a special attention after installing a new hydraulic pump.
A) The relief filters should be readjusted
B) The filters and strainers should be
checked frequently
C) System pressures should be readjusted
D) The fluid should be drained and
renewed
E) All above
36. All details of fuel bunkering, ballast handling, tank cleaning or slop disposal must be entered in the ...............................................
A. Rough log
B. Engine room log
C. Oil record book
D. Smooth log
E. A and B
37. It shall be the responsibility of the ------------------- to prepare the boilers for inspection.
A. Chief Engineer
B. 2nd Engineer
C. Boatswain
D. 2nd officer
E. Any above organization
38. Performance of a turbocharged engine can be improved by:
Decreasing valve over lap
B. Preheating
C. Aftercooling intake air
D. Preheating light fuels
E. Heating intake air
39. When maneuvering, you discover heavy smoke coming from the turbocharger casing. You should:
A. Check the air filter for dirt
B. Check for an exhaust leak
Check the cooling water temperature
Notify the bridge and ask to shut the
engine down
E. Check fuel oil consumption
40. A device which will function to bring an engine to a full stop in order to protect it from damage due to excessively high speed is known as a/an:
A. Torque limiter
B. Overspeed trip
C. Overspeed governor
D. Load limit governor
E. Any of above
41. The requirement for portable fire equipment is ................
Annual check
Keeping in easily accessible places
Hose connections and keeping hoses in good condition
All above
Before the end of consuming period
42. A fire sprinkling system must be fitted ........
On all vessels over 5000 GT.
In conjuction with the Co2 system,
With a pressure tank of fresh water to the supply system pending the starting of the pump,
None of the above
A and C
43. The process of supplying the intake of a diesel engine with air at a pressure greater than atmospheric is called
Engine displacement
Scavenging
Air injection
Supercharging
Intercooling
44. In the simple mechanical governor, the:
Flywheel centrufigal force is balanced by spring pressure
Centrifugal force rotates the ball head
Flyweight centrifugal force is balanced by hydrolic pressure
Speeder spring actuates the fuel control rod.
Hydrolic force rotates the ball head
45. The bulb for the TEV (Thermostatic Expansion Valve) is located..........
In the middle of evaporator coils
Near the evaporator coils outlet
Near the evaporator coils inlet
On the bottom row of the evaporator
None of the above
46. The coils in the evaporator are attached to the header by
Pipe nipples
Union type fittings
Welding
Bolted flanges
Both C and D
47. The dehydrator on a refrigeration plant is used to ...
Add moisture to the system
Remove moisture from the system
Remove air from the system
Remove oil from the system
Both C and D
48. The oil level in the compressor should be checked:
While the compressor is in the operation
Just before starting the compressor
After a long period of operation
For both B and C
None of the above
49. As freon leaves the expansion valve:
Pressure decrease-Volume increase
Volume decrease-Pressure increase
Volume increase-Pressure increase
Pressure increase-Volume decrease
None of the above
50. The selonoid valve can be typed as a:
Thermal valve
Magnetic stop valve
Bellows valve
Bimetallic valve
Both C and D
51. What statement is not true regarding the function of steam turbine
Steam turbine extracts mechanical work from the energy stored in steam
Steam turbine generates electrical energy
Sometimes steam turbine is connected to a reduction gear
Steam turbine is used as cargo pump drive source
Steam turbine produces steam for steam engine
52. The burning of fuel and air mixture in the cylinder is called as:
Propulsion
Combustion
Expansion
Compression
Conversion
53. “Gas will expand when heat is applied” What statement below has the same meaning with this law of phsycs
Gas expands unless heat is applied
When gas expand, its temperature decreases
Whenever gas is heated, it expands
Gas expands, otherwise heat is applied
If we expand the gas, it will heat
54. “When a gas is compressed, the temperature of the gas will increase” What word can be used instead of underlined word without changing meaning
Decrease
Raise
Reduce
Expand
Exceed
55. What statement is not true regarding gas turbines
Gas turbine operates on the Otto Cycle
Gas turbine has low manoeuvring capability
Gas turbine are used on super tankers, naval ships or aircrafts
Gas turbine is not attractive for a ship owner because of high fuel cost
Gas turbine is an internal combustion engine
56. Performance of a turbocharged engine can be improved by
Decreasing valve overlap
Preheating
Aftercooling intake air
Preheating light fuels
Heating intake air
57. When maneuvering, you discover heavy smoke coming from the turbocharger casing. You should:
Check the air filter for dirt
Check for an exhaust leak
Check the cooling water temperature
Notify the bridge and ask to shut the engine down
Check fuel oil consumption
58. A device which will function to bring an engine to full stop in order to protect it from damage due to excessiveley high speed is known as a/an:
Torque limiter
Overspeed trip
Overspeed governor
Load limit gavernor
Any of above
59. Refrigerant leakage from the compressor crankcase is prevented by........
Using skirt type piston
Using shaftseals
Using lantern rings
Maintaining a vacuum in the crankcase
Any above
60. The reciprocating motion of a connecting rod is transformed into a rotary motion by the .......
Crankshaft
Crankwebs
Crank cheeks
Crankpins
Piston
61. A pyrometer is normally used to measure:
Steam pressure
Water temperature
Draft loss
Humidity
Gas temperature
62. The successive order of 4 stroke diesel engines:
Compression-suction-firing-exhaust
Suction-firing-compression-exhaust
Suction-compression-exhaust-firing
Suction-compression-firing-exhaust
Compression-air inlet-firing-exhaust
63. When the valves are operated........ on a diesel engine, they are actuated by means of cams, pushrods, rocker arms and rollers
Mechanically
Hydrolically
Pneumatically
Electrically
Any above
64. The pistonheads in the engine are manifactured concave and convex shaped in order that........
The vessel will be faster
It will control the temperature of the engine
It will increase oil pressure in the engine
It will increase the durability of the piston
It will provide a powerful engine
65. Lubrication oil viscosity in an operation diesel engine can be reduced by:
Overloading the engine
Increasing the amount of lube oil
Decresing the amount of cooling water
Combustion by products contamination
Fuel oil dilution
66. All the following are used for low temperature starting, except:
Ether
Jacket water heaters
Both a and b
Air intake heaters
Cylinder compression ratio reduced
67. The purpose of the low pressure cutout switch is to:
Maintain liquid refrigerant at the suction of the compressor
Maintain a preset suction pressure to the compressor
Cut out the compressor in at a preset temperature
Maintain a compressor in at a preset temperature
Cut compressor in and out at a preset pressure
68. In terms of pressure and temperature, what happens to the primary refrigerant in the compressor
Its pressure and temperature are both lowered
Its pressure and temperature are both raised
Its pressure is lowered and its temperature is raised
Its pressure is raised and its temperature is lowered
None of the above
69. Watertube boilers are designed to operate within the conditions of ........
High pressure, temperature, capacity
Low pressure but high capacity
Heavy but quick steam raising process
A and c
For the auxiliary purposes
70. The purpose of the evaporator is to:
Absorb latent heat of vaporization
Absorb latent heat of fusion
Transfer latent heat of vaporization
Transfer latent heat of fusion
Transfer latent heat of freezing
71. In a gas turbine , the pressure of air is changed
At the inlet
In the combustion chamber
Through the compressor
During the combustion
Through the inlet of turbine
72. What factor is not primarily taken into account by a ship owner when choosing an engine
Cost
Propulsive efficiency
Size and weight
Maintenance work load
Installation time
73. The term ........indicates the piston motion in the cylinder
Cycle
Sequence
Combustion
Stroke
Ignition
74. The sequence of events that take place in the cylinder of an engine is indicated by the term:
Cycle
Stroke
Power
Compression
Combustion
75. “Piston moves upward to almost top of the cylinder, both intake and exhaust valves are closed. The air compressed above the piston” describes the .......... stroke
Compression
Power
Intake
Exhaust
Ignition
76. What statement is not true regarding power stroke?
The air pressure is very high
The compressed air temperature is below the ignition point of the fuel
The heated air ignites the fuel
The intake and exhaust valves are closed
Power stroke comes after compression stroke
77. “The piston is forcing the exhaust gas out of the cylinder by moving downward” What word must be changed to get the true meaning
Piston
Exhaust
Gas
Cylinder
Downword
78. What statement is not true regarding two-stroke engines?
Two stroke engines are uniflow and cross flow types
Two stroke engines have ports on liner
Crankshaft completes two revolutions in a two stroke cycle
Compression and power strokes are two strokes comprising the cycle
Two-stroke engines may be fitted with crossheads
79. In “Sulzer 7RLB 66”; 66 indicates ........
The number of cylinder
The diameter of cylinders
The year that engine manufactured
Revolution per minute
Model
80. .......is not stationary part of a diesel engine
Crankcase
Crosshead
Bedplate
Cylinder
Liner
81. Bedplate is seated on the ..........
Cylinder block
Crankcase
Engine frame
Girders
Foundation
82. What statement is not true regarding crankcase?
It is below the cylinder
It consist of upper and lower sections
It provides a sump for fuel oil
It encloses the crankshaft
Manholes on it allow access for maintenance
83. Cylinder head on a four-stroke engine contains.......
Air starting valve
Inlet valve
Exhaust valve
Fuel injector
All
84. What statement is not true regarding bedplate?
Bedplate supports the engine
It consists of cross and longitudinal girders
It is seated on the foundation
It must withstand the fluctiating forces during operation
It encloses the main bearing
85. The cooling medium for cylinder cooling circulates through
Jacket
Main bearings
Crankcase
Sump
Shafting
86. Which of the following parts is not a running part?
Piston
Crosshead
Cylinder
Exhaust valve
Camshaft
87. What part is exposed to the combustion directly
Piston crown
Piston skirt
Piston rod
Piston rings
Piston pin
88. Piston is connected to connecting rod by:
Piston rod
Piston head
Piston pin
Piston skirt
Crosshead guide
89. The grooves on the piston are for:
Piston pin
Piston rod
Piston crown
Crosshead slippers
Piston rings
90. What has a direct contact with piston rings?
Liner
Camshaft
Crosshead
Crankshaft
Jacket
91. What statement is true about pistons?
Piston is generally cooledwith seawater
Piston moves axially
Piston is connected to the connecting rod by piston pin
Piston is only made of steel
Diesel engines use only trunk type pistons
92. What statement is not true regarding camshaft?
Camshaft is used to operate the fuel pump and exhaust valve
b. It rorates at the same speed with the crankshaft on four stroke engines
Camshaft is driven by crankshaft with the gear gear drive or chain drive
Camshaft has cams
The camshaft is driven by a cam gear
93. In two stroke crosshead engine, the piston is connected to the crosshead by:
Crosshead slipper
Piston rod
Piston pin
Cam journal
Piston crown
94. ........is not a cooling system.
Piston cooling
Crankcase cooling
Lube oil cooling
Charge oil cooling
Pitch propeller cooling
95. The purpose of cylinder cooling is:
Maintaining the engine temperature at a certain level of operation
Retaining the piston temperature at constant speed
Making liner more slippery
Treating the fresh water before starting the engine
Reducing the crankshaft revolution speed
96. Receiving fuel on board the vessel is called as:
Storage
Seperation
Bunkering
Transfer
Service
97. Fuel transfer pumps are of:
Centrifugal type
Gear type
Positive dispalcement type
Axial flow type
Screw type
98. Fuel main is located:
On the bunkering station
On the storage tank
On the service tank
In the engine room
Underneath the cargo spaces
99. What parts are not lubricated on four stroke cycle engines?
Main bearings
Crank pins
Piston pins
Crosshead guides
Liners
100. The lubricating oil temperature is controlled with a:
Thermostatic valve
Viscosity regulator
Heater
Cooler
Strainer
101. The lubricating oil is stored in the ........located at the bottom of crankcase
Sump
Expansion tank
Drain tank
Lubricator
Steam heating coil
102. What is not a part of propulsion system
Propeller
Shafting
Main thrust block
Reduction Gear
Rudder
103. “Hub, blade, pitch”. The terms are related to:
Shafting
Rudder
Thrust block
Propeller
Sterntube
104. “Each blade is set into the boss and connected to the crosshead.” What word cannot be used instead of the underlined word?
Linked
Attached
United
Slipped
Joined
105.Performance of a turbocharged engine can be improved by:
Decreasing valve over lap
Preheating
Aftercooling intake air
Preheating light fuels
Heating intake air
106. The drains from both effects in a low pressure evaporator have their pressures equalized in the:
Equalizer tank
Drain tank
Flash chamber
Air ejector condense
Fuel oil tank
107.Prior to port arrival, a diesel alternator ....., turbo alternator ....... And all the full away procedure should be done .....
Will have to be started/will be shut down/in reverse order
Does not have to be started/will have to be shut down/in reverse order
Will have to be started/will have to be started/in right order
Will have to be shut down/will have to be started/in reverse order
Doesn’t have to be shut down/will have to be shut down/in right order
108.When oil is heated, it becomes.......
Less viscous
Emulsified
More viscous
Vitrified
Not necessarly viscous
109.The instrument always used in conjunction with a salinity indicator is the:
Pyrometer
Thermometer
Hygrometer
Hydrometer
Oxygen meter
110. ............is hardly the cause of a smoky diesel engine exhaust
Overload
Malfunctioned injector
Choked exhaust pipes
Inappropriated amount of fuel
Appropriated amount of fuel
111. When starting ballasting .....valve should be opened last
Seacock
Pump discharge valve
Deck filling valve
Tank suction valve
None above
112. Fire detecting and extinguishing equipment is required on all ......
Cargo vessels
Passanger vessels on international voyage
Vessels over 150 feet in lenght
Vessels over 450 feet in lenght
Cruise boats
113. The lubricant is expected to have the qualities of .......
Preventing metal to metal contact
Causing metal to metal contact
Decrease friction
Decrease friction wear
All expect B
114..........Should be followed as a procedure, if it is necessary to pump bilges while a vessel is in port
a. Pumping only if discharge is led to a shore tank or barge
Pumping only during the hours of darkness
Pumping only on the outgoing tide
Pumping only as much as is necessary
Pumping only the day hours
115. .........should be considered as a hazard on the propeller and a through examination and repair will be carried out when the vessel is in dry dock
Bent blades
Signs of cracks on the blade edge
Deep pits and holes
Edge cracks
All above
116. Considering the fuel ignition quality is determined by .........
a.Cetane number
b. Diesel index
c. Calculated cetane index
d. Flash point
e. All except D
117. How often should the emergency diesel be run under load?
Once a year
Once a month
Once a week
At survey time only
At drydock
118. The main charecteristics of a diesel engine is:
Internal combustion engines; the fuel is burned external of the cylinders
Producing high power of energy
Either 2 or 4 stroke, fuel is burned inside the cylinder
Economical in compare with the steam engines, but hard maintenance
Fixed sequence of events within its unique type
119. On a diesel engine a freshwater heat exchanger is used rather than a saltwater one to:
Maintain fuel oil temperature
Maintain lub oil temperature
Cut down on rust and corrosion
Keep the engine block from freezing in cold water
Maintain air temperature
120. The upper section of a piston is called the:
Land
Skirt
Crown
Plate
Disk
121. The suction control switch on the compressor is a .......
Thermal element
Thermostat
Pressure element
None above
All of above
122. The heat which is used to change a liquid to a gas or vapor is called latent heat of...
Absorbtion
Fusion
Liquid
Evaporization
Fission
123. As freon leaves the expansion valve .........
Pressure increases – volume increases
Pressure decreases – volume increases
Pressure decreases – volume decreases
Pressure increases – volume decreases
Pressure increases – no change in the volume
124. An overheated bearing in the main propulsion unit is indicated by:
Bubbles in the sight glass
Sludge in the strainers
A high oil level in the sump
Low temperature of the lube oil leaving the bearing
High temperature of the lube oil leaving the bearing
125. Emulsification of oil will occur when mixed with:
Air
Water
Black oil
Ice cream
Oxygen
126. The liner which has no direct contact with the cooling water is what kind of a liner
Wet
Dry
Integral
None of the above
Cooled with lubrication oil
127. What statement is not true regarding boilers
Boilers produce steam for machinery
Boilers are used for main propulsion plant
Boilers can be classified as fire tube and water tube
Boilers can be found on all motor vessels
Boiler feedwater is circulated by a feedwater pump in all boilers
128. A scotch marine boiler does not have:
Furnace
Manhole
Smoke tubes
Burner
Drums
129. What statement is not true regarding tubes of a fire tube boiler
All the tubes are made of heat-resistant metal
All the tubes are surrounded by water
All the tubes immersed in water
All the tubes are mounted vertically
The hot gases pass through these tubes
130. What gives the characteristic of fire tube boilers
Fire tube boilers have less water capacity
Fire tube boilers are used for low pressure
Fire tubes boilers are more conductive
Fire tube boilers can steam up in a short time
Fire tube boilers are used on oil tankers
131. “Diffuser plate, atomizer, air register” These terms are related to:
Steam drum
Header
Burner
Downcomer
Water drum
132. The moisture is removed from the steam by means of
Downcomer
Generating tubes
Water drum
Steam drum
Waterwall tubes
133. The purpose of attemperator is:
To remove the impurities from the feedwater
To reduce the temperature of superheated steam
To supply heat recovery
To remove non-condensable gases from boiler
To remove all moisture from the steam
134. What is used for reducing the temperature of steam for auxiliary machinery?
Superheater
Deaerator
Soot blower
Atomizer
Desuperheater
135. Non-condensable gases are removed from the condenser by:
Air heater
Air ejector
Desuperheater
Attemperator
Deaerator
136. The function of a deaerator is :
Acting as a storage tank to keep water level
Keeping a constant pressure on the feed system
Keeping water free of air
Acting as a contact feed heater
all
137. What statement is not true ?
Soot blower keeps clear of combustion residues
De-aerator keeps water free of air
Air ejector removes non-condensable gases from economizer
Superheater removes the moisture from steam.
Attemperator reduces the temperature of superheated steam
138. “Raw water is not pure enough to use in boiler” What word can be exactly used instead of underlined word?
Treated
Untreated
Dilute
Dissolved
Salt
139. The dissolved salts in feedwater may cause:
Reduction in heat transfer by scale formation
Hardness
Caustic cracking
Tube failure from overheating
all
140. Caustic cracking is the result of:
Foaming
Priming
Excess of alkaline salts
Suspension
Leakage
141. pH Value is achieved by adding:
Hydrazine
Coagulant
Sulphure
Chloride
Magnesium
142. Corrosion within boiler is prevented by:
Polymer treatment
Adding anti-foam
Deaeration
Amine treatement
Adding coagulants
143. Scale and sludge formation is prevented by:
Neutralizing amines
Filming amines
Polymer treatment
Keeping pH value
Deaeration of the boiler by hydrazine
144. “The dissolved gases adhere to the heating surfaces” What word can be exactly used instead of underlined word?
Corrode
Stick
Contaminate
Crack
Suspend
145. ........is the first to do when securing an AC generator.
Tripping the generator circuit breaker
Switching the voltage regulator to manual
Decreasing the field excitation to minimum
Reducing the load on the unit
Increasing the load on the unit
146. The system used for breaking scale from the evaporator coil while the evaporator is in operation is called:
Recirculating
Blowing down
Craking off
Dumping
None of above
147. This gauge measures both inlet and outlet pressures of a strainer
A compound gauge
A duplex gauge
A biogauge
A pressure/vacuum gauge
None of the above
148. In a four stroke engine 2 revolution of the crank is completed within the angle of.....
720°
360°
180°
90°
45°
149. What will happen to a small diesel engine that is equipped with an “auto type” thermostat if the bellows develop a hole in it?
The engine will overheat
The engine will remain cold
The engine will remain not start
The cooling water will “by pass” the engine
None of the above
150. ..........are the common parts within the 2 and 4 stroke diesel engines
Piston, valves, cylinder, fuel injector
Crankshaft, crosshead, cylinder
Turbocharger, piston, gudgeonpin, cylinder
Crankshaft, connecting rod, pistons
Cylinder, connecting road, pistons
151. If the flow of water from a centrifugal pump is stopped by closing the discharge valve with the pump running
The relief valve will open
The water pressure will stabilize at shut off head
The water pressure will tend to rise continously
The driver will be over loaded
The water temperature will tend to decrease continously
152. Which factor below is not the cause of vibration and noise in turbines
Unbalance
Distortion of casing
Loose couplings
Tight couplings
Any above
153. All refrigerator compressor valves are opened and closed via .......
Springs
Camshaft
Pressure differantial
A or C
None above
154. Flashlights used aboard tankers must be ........
Waterproof
Of the three cell type
Approved by the board of fire underwriters
All above
A and C
155. When distilling salt water the cooling-water discharge from the distiller is fed back to the evaporator as feedwater:
To cut down on the amount of cooling water needed
To prevent an excess amount of cooling water from being discharged to the bilges
To supply hot water to the evaporator for more economical operation
To supply sufficient amount of sea water
None of the above
156. A spring bearing on the line shaft is lubricated by:
The lub oil gravity tank
Water leak off from the stern tube
An oil ring and scraber
The main lube oil pump
Any above
157. Which of the following actions should you take to correct a low condensing pressure in a refrigeration system?
Purge the condenser
Remove refrigerant
Adjust the thermostatic expansion valve
Increase the compressor speed
Add refrigerant
158. Pre-ignation can be caused by ........ in an operating diesel engine
Excessively late fuel injection
Oil in the air charge
Water in the fuel
Injection continuing after the fuel charge is ignited
None above
159. A ball bearing will overheated if:
Completely full of grease
Half full of grease
In use for a long time
Operated at high speed
Operated at medium speed
160. One horsepower equals.....
1000 watts
746 watts
100 watts
940 watts
786 watts
161.Emergency generators are placed ........
Near the machinery spaces
Above the bulkhead or freeboard deck whichever the higher
Midships near the engine room casing
Above the deep load line
None above
162. Which one is not identical with the characteristic of the construction of a 2-stroke diesel engines
Instead of valve holes, ports are installed
A cycle is completed in 2 strokes of the piston
Produce high power in compare with 4 stroke engines
The maintenance is simple
A cycle is completed in 2 revolution of the crankcase
163. Which of the following is not one of the parts of D/G overhaul?
Valve rotator
Valve spindle
Intake valve
Valve seat
Starting valve
164. The purpose of an evaporator is to ........
Transmit the latent heat of fusion
Transmit the latent heat of evaporation
Absorb the latent heat of evaporation
Asorb the latent heat of fusion
Any above
165. Which of the following is not used for oil seperation
Settling tank
Filters
Purifier
Centrifuge
incinerator
166. Which statement is not true concerning centrifuges
Centrifuges are used for oil seperation
A centrifuge contains a bowl and conical discs
Centrifuges make use of the centrifugal force
Centrifuges are hydrolic-driven devices
Centrifuges are used to remove coarse particals and waters
167. Which of the following oil seperation units makes use of gravity
Clarifier
Purifier
Settling tank
Filter
Centrifuge
168. Which statement is not true regarding the compressed air?
Air compressor supply the compressed air
The air at the pressure of 20-30 bar is required to start the engine
The compressed air is stored in air receiver
Compressed air is used only for engine starts
The pressure of control air is 7 bars
169. What is not a component of two-stage air compressor
Suction valve
Throttle valve
Cooler
Discharge valve
Drain valve
170. What statement is not true regarding air receivers?
The pressure of air is 20-30 bar
The receiver must store enough air for twelve engine starts
The pressure inside is controlled by a pressure gauge
The air receivers are self-cleaning devices
Drain valves are fitted to drain impurities
171. Air receivers are not fitted with;
Pressure gauge
Reducing valve
Drain valve
Relief valve
Strainer
172. Air receivers are protected against high pressure by;
Pressure gauge
Reducing valve
Relief valve
Drain valve
Silencer
173. Using a semi- permeable to retain salt and impurities from sea water is:
Distillation
Evaporation
Vaporization
Condensation
Reverse osmosis
174. Seawater is pumped into fresh water generation unit by:
Booster pump
Ejector pump
Distilate pump
Sanitary pump
Transfer pump
175. What process is not related to fresh water generation?
Reverse osmosis
Distilation
Evaporation
Compression
Condensation
176. The feed water is evaporated in the evporator by means of :
Brine ejector
Condenser
Ejector pump
Air ejector
Cylinder cooling water
177. What part is not included in the refrigeration system?
Receiver
Condenser
Ejector
Cold rooms
Thermostatic expansion valves
178. The evaporating pressure is maintained constant in the refrigeration system by:
Evaporator
Cooler
Receiver
Compressor
Thermostatic expansion valve
179. Ammonia is extremely toxic” What word can replace the underlined word
Harmless
Poisonous
Perishable
Raw
Corrosive
180. Air conditioning system does not involve:
Heating the air
Ventilating
Compressing the air
Cooling the air
181. What system is directly related to the crew’ s working conditions?
Air compression
Bilge
Air conditioning
Fresh water generation
Refrigeration
182.To prolong the storage life of foodstuff by lowering temperature is:
Air conditioning
Evaporation
Refrigeration
Condensation
Distilation
183. What statement is not true concerning centrifugal pump?
Centrifugal pumps are self-priming
Centrifugal pumps may be classified as single stage and multi stage
They have rotating impeler keyed to shaft
Centrifugal pumps are mostly driven by electric motors
Their casing have a suction inlet and discharge outlet
184. What statement is not true concerning reciprocating pump?
They are positive displacement pumps
They may be used as boiler feed pump, bilge or fuel oil pump
They are designed as single acting or double acting
They are very common on motor ships
Their pumping action is done by a ball
185.Trawlers, whaling ships and purse seiners are in the category of.........
Pleasure crafts
Fishing vessels
Passenger ships
Naval ships
Excursion ships
186. The sequence of events in a cycle within 4 stroke diesel engine is: 1.The piston is forced down at BDC (Bottom dead center) exhaust valve opens 2.The piston is at the top of its stroke, TDC(Top dead center), inlet valve opens, fresh air is drawn 3.Pressure is high in the gases 4.Fuel is injected as the piston is reaches TDC, to start the combustion 5.Inlet valve opens, fresh air drawn as the piston moves down 6. At the bottom of the stroke BDC inlet valve closes and the air in cylinder is compressed as the piston rises
2-5-6-4-3-1
2-5-6-4-1-3
2-6-5-4-3-1
5-2-4-6-3-1
5-2-6-4-1-3
187. An overspeeding diesel engine could best be stopped by:
Disconnecting the battery cables from the starting motor
Draining the cooling water
Draining the hydrolic fluid from the governor sump
Blocking the flow of cooling air to the radiator
Blocking the air intake and securing the fuel supply
188. The cylinder cover is tightened against liner with studs. What word can be used instead of the underlined word?
Removed
Replaced
Screwed
Slackened
Supported
189. The motion of the piston in the cylinder is;
Rotary
Axial
Bending
Fluctuating
Reciprocating
190. “The intake valve is open and exhaust valve is closed. The air is drawn into cylinder while the piston is moving downward” defines
Power stroke
Compression stroke
İntake stroke
Exhaust stroke
Combustion
191. In two stroke engines , if the engine has exhaust valve(s), it is a .............scavenged engine
Cross flow
Non-flow
Overflow
Loop
uniflow
192. Having an unstarting compressor must take you think the possibility of ..........(?)
No charge of liquid in the system
Closed selenoid valves
A and b
None above
Having sufficient amount of air
193. The pump type using a piston or plunger to remove the fluid;
Rotary vane pump
Gear pump
Reciprocating positive displacement pump
Screw pump
Centrifugal pump
194. To remove the impurities and water droplets from oil, ...........are used on board a ship
Purifiers
Clarifiers
Centrifuges
Seperators
All
195. ........is the control of temperature and humidity in a space together with the circulation, filtering and refreshing of the air.
Refrigeration
Air conditioning
Ventilation
Cooling
Circulating
196. While making your rounds, you notice the main lube oil temperature is higher than normal. To remedy this situation, you should:
Speed up the main lube oil pump
Open the lube oil cooler seawater inlet valve wider
Throttle in on the lube oil cooler seawater discharge valve
Close the lube oil cooler seawater discharge valve wider
Open the lube oil cooler seawater discharge valve wider
197. .......the fire pumps are at work. What word can be used instead of underlined part?
İnoperable
Operable
In operation
Arranged
Out of order
198. Oily water seperators are used to seperate oil from bilge water........ The bilge water is pumped........
After / overboard
Before / overboard
Before /inboard
After / out
When / aboard
199. On most diesel engines, the governor controls the speed by:
Controlling the amount of fuel injected into the cylinders
Varying the speed of the turbocharger
Adjusting the compression ratio
Changing the timing of the fuel injection camshaft
Changing the timing of the exhaust valves
200. What word is not related to cargo handling equipment?
Filler
Derrick
Hoisting
Jib
Crane
201. Any electric motor can be constructed to be ........proof.
Short
Ground
Explosion
Overload
A and b
202. In the incident of oil fire ...........
Get water on deck
Open steam or Co2 smothering system to cargo holds
Close off all ventilation, blowers, doors etc.
Open Co2 smothering system to cargo holds
All above
203. Which one is not treated on board?(?)
Sewage
Feed water
Fresh water
Lube oil
Balast water
204. When the seperated oil is burnt by an ......., the application is recorded in Oil Record Book.
Oily water seperator
Ejector
Incinerator
Chlorinator
Aeration chamber
205. If one cylinder was getting more fuel then others the effect will be .........(?)
That cylinder’s being overloaded
The exhaust valve’s being overheated
Average compression
Incomplete combustion
Complete combustion
206. The removal of contaminating impurities from lubricating oil will ......
Increase engine wear
Decrease engine wear
Increase possible breakdowns
Decrease possible breakdowns
B ve d
207. A propulsion diesel engine is normally shut down by ........
Shutting off the air supply
Overspeeding the engine
Securing the fuel supply
Securing the ignition system
All above
208. Sediment collects in a tubular purifier:
On top cover
In drain line
On sides of bowl
On the discs
None of above
209. “Water hammer” is caused by:
Hitting water pipe with hammer
Too much water in pipe line system
Water in steam line
Steam in water lines
Few amount of water in pipe line system
210. The valve which is always partially open when the evaporator is in operation is the:
Vapor valve
Continous blowdown valve
Bottom blowdown valve
Surface blowdown valve
Fresh water valve
211. What kind of bolts would you use on a saltwater line?
Cold rolled
Brass
Cast iron
Plastic
All of the above
212. Studs and nuts intended for use in main steam line flanges and fittings are marked with an “H” or a “T” to show they are:
Heat resistant
Hard finished
Half threated
Corrosion resistant
Fire proof
213. An advantage of aluminium pistons compared to cast iron pistons is:
Greater high temperature strenght
Greater weight per cubic meter
Increased resistance to wear
Low temperature strenght
Better heat conductivity
214. What harmfull consequence can result from sludge in the lube oil system of a trunk piston diesel engine?
Clogged oil pump section screens
Increased oil temperature
Stuck piston rings
Any of the above
None of the above
215. The air supplied to the cylinder by a turbocharger is often reduced in volume by a/an
Air compressor
Diffuser
Filter
Venturi
Aftercooler
216. Insufficient refrigerant in a refrigeration plant on board a ship may result in:
High discharge pressure
Frosting of the crankcase
High temperature of the overboard water
Low section pressure
Low temperature of the sea water
217. The thermostatic expansion valve of R-22 or R-134a refrigeration system controls the:
Back pressure in the evaporator coils
Temperature in the refrigerated space
Superheat in the refrigerant leaving the evaporator
Refrigerant pressure in high side
Temperature in the condenser
218. Which valve is normally closed when charging an R-22 or R-134a refrigeration system through the high side?
The thermal expansion valve
The dehydrator inlet valve
The suction line valve
Both the thermal expansion valve and dehydrator inlet valve
The liquid line king valve
219. When operating at high or low speed in the use of nozzles in a turbine, attention and precaution must be taken that .......
The nozzles in use should be wide open
Operation with a few nozzles as it’s economical
The nozzles not in use must be tightly closed
All above
Only a and b
220. ..........protects the pump shafts from erosion, corrosion and wear
Wearing rings
Renewable sleeves
A hardened metal coating
İnternally flooded lantern rings
Lantern rings
221. An electric heater built into the cylinder water jacket would be used to:
Raise lube oil viscosity for easier starting in cold water
Increase air inlet temperature
Increase compression ratio
Increase jacket water temperature for easier starting in cold weather
Heating compressed air
222. A cracked cylinder head on a diesel engine could be indicated by:
Excessive lube oil consumption
Water draining from the fuel leakoff valves
Excessive fuel oil consumption
Excessive cooling water consumption
Combustion gases venting at the expansion tank
223. “manometer” measures:
Air pressure
Steam pressure
Oil pressure
Water pressure
Oil temperature
224. In a 2 stroke engine each revolution of the crank is completed within the angle of .....
360º
180º
720º
90º
45º
225. When does a two stroke cycle diesel engine produce a power stroke in each cylinder
Once in every 2 revolutions of the crankshaft
Once for every 4 stroke of the piston
Once for every 2 stroke of the piston
Directly after the exhaust stroke
None of the above
226. A steam turbine has curved blades. What word can be used the opposite of the underlined word?
Straight
Flat
Sharp
Smooth
Vertical
227. Which of the followings is not one of the qualities of the governor?
The main control device on the engine
Controls the engine speed when the power is required to change
The supplementery control device on the engine
Can be adjusted automatically
Made up speed sensing arrangement and hydrolic unit
228. “The intake valve is open and exhaust valve is closed. The air is drawn into the cylinder while the piston is moving downward”defines;
Power stroke
Compression stroke
İntake stroke
Exhaust stroke
Combustion
229. All diesel lubricating system must:
Have a forced feed mechanical lubricator
Prevent oil fog in the crankcase to avoid crankcase explosion
Provide oil for cooling the piston and cylinder wall
Provide a film of oil between the piston and cylinder wall
None of the above
230. The main components of crankshaft assembly are webs, pins and journals. What word can be used instead of the underlined word?
Purposes
Sides
Parts
Types
Means
231. What is not a rotary pump type?
Screw
Gear
Lobe
Vane
Reciprocating
232. ...... Are not self-priming pumps
Screw pumps
Reciprocating pumps
Gear pumps
Centrifugal pumps
Rotary positive displacement pumps
233. Any device used to regulate or stop the flow of liquid in a piping system is:
Pump
Valve
Ejector
Separator
Heat exchanger
234. .......is not a valve type?
Relief valve
Stop valve
Throttling valve
Check valve
Return valve
235. Metal made by combining two or more methalic elements is:
Monel
Alloy
Cast
Forged
Malleable
236. Which of the following valve types is not a stop valve?
a. Ball valve
b. Globe valve
c. Relief valve
d. Butterfly valve
e. Gate valve
237. What statement is not true regarding butterfly valves?
Butterfly valves are stop valves
Butterfly valves are small, quick-acting valves
Butterfly valves can be used for throttling
Butterfly valves can be uesd in water systems and lube systems
A spherical disc is used open and close the valve
238. To control the supply of expandable fluids such as compressed air, steam, a .....is used
Cock
Stop valve
Throttling valve
Relief valve
Drain valve
239. To discharge excess pressure in a piping system, a .....used
Ball valve
Stop valve
Relief valve
Throttle valve
Check valve
240. What associate is not true?
Air conditioning-cold room
Oil seperation – clarifier
Pump – positive displacement pump
Valve – non-return valve
Fresh water generation - evaporator
241.Marine electrical equipment are:
Generators
Motors,
Batteries,
Switchboards,
all
242. The machine that generates electrical energy is:
Generator,
Electric motor,
Battery,
Transformer,
rectifier
243. The machine that converts the electrical energy into mechanical energy is a:
Generator,
Motor,
Armature,
Transformer,
stator
244. Which of the following parts is not of a generator?
Rotor,
Stator,
Flywheel,
Winding,
Armature
245. What part of generator is not rotating?
Rotor,
Armature,
Rotorshaft,
Slip rings,
stator
246. The parts of generator that connect the high output voltage to the external circuit are:
Coils,
Rotors,
Slip rings and brushes,
Stators,
Armatures
247. What cools the generator by dissipating heat in the generator frame?
Rotor assembly,
Stator assembly,
Brushes,
Fan assembly,
Coils of wire
248. Which of the following devices are loads?
Alternator,
Wires,
Distribution panel,
Motor,
Coil
249. What is a part of marine electrical distribution?
DC motors,
Shaft generators,
Alternator,
Emergency switchboard,
AC motors
250. What statement is not true regarding switchboards?
Switchboards distribute electric power,
There are feeders that extend from switchboard to the distribution panels,
Switchboards are divided into sections by busbar isolators,
Switchboards receive power directly from transformer,
Switchboards are connected to the panels and circuits
251. What is used to seperate operating electrical equipment from the rest of the electric system
Busbars,
Emergency switchboard
Batteries,
Branch circuits,
Circuit breakers and fuses
252. Voltage generated by an alternator is reduced by:
Fuse,
Circuit breaker,
Batteries,
Flywheel,
Transformer
253. The voltage generated by an alternator is:
110 V.,
440 V,
220 V,
680 V,
120 V.
254. What statement is true regarding DC motors?
DC motors are more common than AC motor,
DC motors are easy to maintain,
DC motors are less expensive than AC motors,
DC motors have the constant speed characteristic,
DC motors run on the principles of attraction and repulsion of magnetism
255. What statement is not true regarding AC motors?
AC motors consist of two main assemblies : rotor and stator,
Rotors in an AC motor are turned by magnetic field,
The rotating field in an AC motor induces electromotor force,
AC motors operate on direct current,
Single-phase AC motors are also called squirrel cage motors
256. What can be a source of electric power?
An electric motor,
A fuse,
A battery,
A control panel,
A rotor.
257.“electrolite, anode, electrode”.The terms are related to a:
Cell,
Fuse,
Coil,
Pole,
Stator
258. What is the solution that reacts with the electrodes?
Battery,
Electrolyte,
Cell,
Anode,
Lead.
259. A lead-acid battery of 6 cells can give the voltage of;
2,2 V,
7 V,
12 V,
1,4 V,
6 V.
260. What statement is not true regarding electrolyte?
The electrolyte reacts with the electrodes
The electrolyte provides a path for electron flow,
It may be a salt, an acid, or an alcaline solution,
Electrolytes are non-conducting materials,
It can be a liquid or dry substance.
