单项选择题
A.dangerous over-speeding B.a loss of lube oil pressure C.activation of the fixed CO2 system for the emergency generator space D.all of the above
The purpose of the flywheel is to （）A.provide energy to...
单项选择题The purpose of the flywheel is to （）
A.provide energy to operate the engine between power impulses B.neutralize the primary inertia force of the crankshaft C.reduce the shock of starting loads on the main bearings D.prevent the engine from operating at critical speed
While overhauling a jerk-type fuel pump it is necessary...
单项选择题While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）
A.Delivery check valve B.Pump barrel C.Tubing to the injector D.Cam follower
Combustion gases formed in the cylinder of a diesel eng...
单项选择题Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by （）
A.cylinder valves B.compression rings C.piston skirts D.oil rings
