The main purpose of starting the diesel engine on air briefly is（）<br>A:to inspect if the cylinder has the water leakage<br>B:to expel out the residual water/gas/oil from the cylinder<br>C:to check if fuel supply is normal<br>D:A and B

The main purpose of starting the diesel engine on air briefly is（）
A:to inspect if the cylinder has the water leakage
B:to expel out the residual water/gas/oil from the cylinder
C:to check if fuel supply is normal
D:A and B

出自：海船船员证

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