單項(xiàng)選擇題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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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題The condensers located in various stages of a flash evaporator are cooled by()

A.distillate
B.seawater
C.brine
D.air

5.單項(xiàng)選擇題Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to ()

A.burn excessive amounts of lube oil
B.overheat without smoking
C.operate with reduce power or stop
D.run away without load