Marine Engineers Quiz | Marine Engineers MCQs with Answers

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Questions
101 Vacuum priming pumps which work on the principle of fixed vane pumps require _____________for___________ clearance between vane tips and casing.
A Lube oil, lubricating
B Lube oil, sealing
C Water, sealing
D Gland packing, sealing

Answer: Water, sealing
102 The flow rate through a F.O. transfer pump will not be affected by which of the following factors?
A Low F.O. temperature
B Low sounding in F.O. tank
C Internal leakage within the pump
D Leaking discharge valve

Answer: Leaking discharge valve
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103 Which of the following can be done to reduce the cold corrosion of Main Engine cylinder liners using high sulphur fuel oil :-
A Increasing cylinder oil feed rate
B Using high TBN cylinder oil
C Increasing scavenge air temperature
D Decreasing cylinder oil feed rate

Answer: Using high TBN cylinder oil
104 When pressure inside a system falls below that of the vapour pressure of the liquid Cavities r formed, cavities travelling to high pressure region collapses releasing Considerable energy damage the metal surface which is known as
A Cavitation
B Erosion
C Impingment Corrosion
D Cavitation Erosion

Answer: Cavitation Erosion
105 Copper tubing is used in refrigerant system because
A It has less internal resistance
B It is cheaper compared to other materials.
C It is easier to check leaks in copper based system
D None of the above

Answer: It has less internal resistance
106 Which of the following V/V cannot be overhauled in place without removing piping?
A BallValve
B Diaphragm valve
C Globe valve
D Butterfly valve

Answer: Butterfly valve
107 After maintaining correct discharge pressure , soon ceases to discharge water what are possible cause?
A Pressure gauge wrong
B Pump sucking air
C Discharge valve throttled
D Casing wear ring is worn

Answer: Pump sucking air
108 Which of the following is a correct point for sampling of system lube oil for on board or shore analysis?
A Standpipes
B Purifier outlets
C Inlet or outlet of L. O. coolers
D Tank drains

Answer: Inlet or outlet of L. O. coolers
109 Increasing the rotational speed of a cargo pump the pump flow rate will:
A Increase in direct proportion to the increase in speed
B Decrease in direct proportion to the increase in speed
C Flow rate doesn???t depend upon speed
D Flow

Answer: Increase in direct proportion to the increase in speed
110 Surface preparation of steel surfaces , prior carrying out painting is important because (choose the best alternative) :
A Any rust and contaminant inclusions may cause local paint film breakdown
B Too much paint will be consumed if surface preparation is not carried out
C Surface will be very rough if proper surface preparation is not carried out
D Surface preparation deposits a chemical onto steel surface which reacts with paint film and causes strong bonding

Answer: Too much paint will be consumed if surface preparation is not carried out
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