單項選擇題The main purpose of changing main engine to electronic controlled is not to（）
A.control fuel injection time more precisely
B.control fuel injection rate more precisely
C.meet the environmental requirements
D.meet high engine speed requirements
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1.單項選擇題To meet the market requirements, a marine diesel engine should not be of（）
A.big size
B.fuel economy
C.low speed
D.high power
2.單項選擇題The common rail engines show great advantages in combustion especially（）.
A.at high speed and full load
B.at low speed and part load
C.when heavy fuel oil is used at sea
D.when the ships run long distance
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For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
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To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
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Which of the following items don’t belong to dock repair works?（）
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