單項選擇題

A dirty fuel oil filter element can be detected by （）

A.Visual inspection of the element
B.the pressure drop cross the filter
C.high fuel oil tank temperature
D.increase flow rate from the filter

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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

單項選擇題

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

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A dirty fuel oil filter element can be detected by （）

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

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