单项选择题
What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）
A.White
B.Black
C.Blue
D.Clear
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A.low ignition quality
B.a high volatility
C.low ignition delay
D.a high cetane number -
单项选择题
High exhaust temperatures from all of cylinder of a turbocharged, four-stroke/cycle diesel engine can be caused by an（）
A.inoperative turbocharger
B.inadequate fuel supply
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One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the （）
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