试题与答案

When an auxiliary boiler is panting and em

题型:单项选择题

题目:

When an auxiliary boiler is panting and emitting black smoke, you should ().

A.increase the fuel oil temperature

B.decrease the fuel oil temperature

C.decrease the fuel oil supply pressure

D.increase the air supply

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D

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