單項(xiàng)選擇題

Lube oil in the fresh water cooling system of a diesel engine may result from a （）

A.camshaft seizure
B.lube oil pump failure
C.lube oil cooler failure
D.lube oil pump overflow

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單項(xiàng)選擇題

Which of the following problems is the main source of fuel pump and injection system malfunctions?（）

A.Improper lubrication
B.Air in the fuel system
C.Coated fuel lines
D.Excessive vibration

單項(xiàng)選擇題

Which of the following faults would allow lube oil to enter the cooling system of a diesel engine?（）

A.Excessive valve train lubrication
B.Leaking standby oil cooler core
C.Excessive lube oil pressure
D.Excessive lube oil in the system

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