Marine Engineers MCQs with Answers | Marine Engineers Quiz

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

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