海船船员 - 全国海船船员

不定项选择题

High firing pressures and low exhaust temperature in a diesel engine may resultfrom().

A. decreased piston to cylinder head clearance
B. increased exhaust system back pressure
C. early fuel injection timing
D. low scavenge air temperature

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不定项选择题

(piston area)×(piston stroke)×(numbers of the cylinders)=engine().

A. brake horsepower
B. displacement
C. cylinder volume
D. cylinder clearance

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不定项选择题

If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is().

A. a broken shaft on the freshwater pump
B. an excessive accumulation of scale in the heat exchanger
C. an incorrect thermostatic element operating range
D. lube oil in the cooling water

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不定项选择题

Accidental flooding of the engine room bilges by the bilge main is prevented by().

A. stop-check valves installed in the bilge suction manifolds
B. using a positive displacement reciprocating bilge pump
C. installing educators in all bilge rose boxes
D. installing a swing check before each bilge valve

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不定项选择题

Which of the following firing order may be used for a 6-cylinder engine？ ()

A. 1-2-3-4-5-6
B. 1-2-3-6-5-4
C. 1-5-3-6-2-4
D. 1-3-4-5-6-2

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不定项选择题

Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result

A. overload on the pump motor
B. low fluid level in the reservoir
C. low fluid viscosity around the shaft seal
D. high oil level in the sump

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不定项选择题

Diesel engine blow-by is the leakage of combustion gases past the().

A. oil rings only
B. compression and scraper rings
C. cylinder liner sealing
D. cylinder liner ring grooves

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不定项选择题

A person on a fixed, or floating platform. engaged in oil exploration, located 10 nautical miles from nearest land MAY discharge().

A. food waste
B. food, ground to less than 1 inch
C. paper, ground to less than 1 inch
D. None of the above

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不定项选择题

The water level showing in a boiler water gauge glass is usually () duringworking.

A. higher than the actual drum water level
B. equal to the actual drum water level
C. increasing due to steam condensation in the glass
D. lower than actual drum wafer level

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不定项选择题

The water in an auxiliary boiler should be tested for chloride content to determine

A. total dissolved solids
B. salt contamination
C. water harcness
D. chlorine contamination

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