單項選擇題

A loud clicking noise from the valve compartment of an operating diesel engine would indicate（）

A.worn valve seats
B.worn main bearing
C.excessive valve clearance
D.weak rocker arm springs

你可能感興趣的試題

In the cylinder of a diesel engine fuel is ignited by the（）

A.spark from a plug in the pre-combustion chamber
B.electrical discharge from the distributor
C.heat of compression within the cylinder
D.heat from the fuel injection nozzle

單項選擇題

Diesel engine air start valve timing is controlled by（）

A.engine operating speed
B.an air manifold
C.a hydraulic distributor
D.individual cams and valve gear