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单选题
During the inspection, the starting air valves should be closed （） the engine from turning.
A
to increase
B
to speed up
C
to prevent
D
to reduce
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单选题During the inspection, the starting air valves should be closed （） the engine from turning.A
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单选题Before starting an air compressor, It should be （）.A
unloadedB
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cylinderC
outlet pipeD
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relieving intercoolers of high temperature buildupsC
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seating valve plates during compressor shutdown
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单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）A
The expansion tank should be topped offB
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单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）A
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单选题Explosions do occur （） caused by the ignition of oil or vapour gaining access from compressors or defective engine starting valves.A
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in refrigerating plantsC
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单选题The starting air bottle should be pumped up to maximum pressure by the （） before start of the engine.A
air compressorB
refrigeration compressorC
vacuum pumpD
purifier
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单选题What is TRUE of pressure/vacuum valves? （）A
They are designed to provide for the flow of small volumes of tank atmospheres caused by thermal variations in a cargo tankB
They should operate in advance of the pressure/vacuum breakersC
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All of the above
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