单项选择题

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
D.driven by separate motor

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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 （）

A.fuel line connections to cylinder injection valves
B.gasket surfaces of the fuel oil filters
C.discharge fitting of the fuel injector pumps
D.suction side of the fuel oil tran

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

单项选择题

Air in the fuel lines of a diesel engine can cause （）

A.ignition failure
B.oxygen corrosion of the fuel lines
C.the pistons to seize
D.blue smoke