单选题The main purpose of warming the parts of the main engine is （）Ato reduce heat stressBto reduce low temperature corrosionCto improve firing and starting performanceDfuel saving
单选题
The main purpose of warming the parts of the main engine is （）
A
to reduce heat stress
B
to reduce low temperature corrosion
C
to improve firing and starting performance
D
fuel saving
参考解析
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相关考题：
When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be______.A.disengaging the clutch firstly, then stopping the main engineB.stopping the main engine firstly, then disengaging the clutchC.stopping the cooling water pump firstly, then stopping the main engineD.stopping the main engine and disengaging the clutch at the same time
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