A.achromatism or thin gray
B.thin white
C.sky-blue
D.black
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A.notify the duty officer, reduce the engine speed, take some measures to remove failures
B.notify the duty officer and stop the engine immediately, find the cause and remove failures
C.notify the C/E
D.notify the captain
A.2
B.3
C.4
D.5
A.open the indicator cocks
B.supply some LO to cylinder liner wall with lubricator
C.put the fuel handle in the "stop" position
D.pump up the air bottle
A.cooling water of the cooling system
B.fuel of the FO system
C.LO of the LO system
D.cooling water of the cooling system and LO of the LO system
A.to reduce heat stress
B.to reduce low temperature corrosion
C.to improve firing and starting performance
D.fuel saving
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Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
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