單項選擇題

The major cause of fuel pump and injection system problems is （）

A.improper adjustments
B.contaminated fuel
C.kinked fuel lines
D.excessive engine vibration

你可能感興趣的試題

A diesel engine should not be operated at low loads for long periods of time because（）

A.heavy carbon deposits will buildup on the valves and in the exhaust
B.fuel dilution is increased at low load
C.exhaust valves may be damaged
D.all of the above

單項選擇題

Diesel engine fuel oil contamination often results in （）

A.governor malfunctions
B.fuel injection system malfunctions
C.high cylinder lube oil temperatures
D.low intake temperatures