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单选题
柴油在气缸内燃烧是（）。
A
压燃
B
点燃
C
自燃
D
压燃或点燃
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①B
②C
①②都对D
①②都不对
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单选题If anything abnormal be found on the load change of main engine when the ship is entering in shallow waterway, before taking measuring the engineer on duty should （）A
stop main engine immediatelyB
ask the captain and the chief engineer’s permission for stopping the engineC
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the vessel's headingB
sea conditionsC
seasonsD
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单选题For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because （）.A
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Thermal expansion valve frozen openB
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