单项选择题

Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）

A.To test the starting system
B.To remove air bubbles from the jacket water
C.To ensure that the lube oil system delivers pressure
D.To ensure foreign material (water etc) is not present in the cylinders

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In a diesel engine, a positive displacement type blower is usually （）

A.gear drive by the engine
B.driven by an exhaust gas turbine
C.driven by a camshaft
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单项选择题

If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the （）

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单项选择题

Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）

A.increasing the quantity of starting air
B.increasing the lube oil pressure
C.heating the engine fuel supply
D.heating the engine jacket water