單項選擇題Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
A.low oil pressure
B.high coolant pressure
C.leaking fuel injector
D.cracked cylinder head or liner
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1.單項選擇題The device used to limit engine torque at various engine speeds is called a （）
A.speed limiting governor
B.variable speed governor
C.constant speed governor
D.load limiting governor
2.單項選擇題A fuel leak occurs in the high pressure fuel piping between the injection pump and fuel nozzleThis requires immediate repair because of the （）
A.high cost of fuel
B.serious fire hazard
C.possibility of pollution
D.poor combustion which will occur in that cylinder
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