單項(xiàng)選擇題If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the ().

A.compression pressures are below normal
B.lube oil is diluted with fuel oil
C.cranking speed is too low
D.exhaust system is partially restricted


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1.單項(xiàng)選擇題Routine monitoring of a diesel engine should include ().

A.checking for leaks
B.checking temperatures and pressures
C.listening for abnormal noises
D.all of the above

2.單項(xiàng)選擇題A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST ().

A.reduce the engine load
B.increase the cooling water flow
C.increase the lube oil pressure
D.adjust the fuel rack

3.單項(xiàng)選擇題The function of diesel engine piston compression rings is to ().

A.prevent piston side thrust
B.prevent engine friction losses
C.transmit heat from the piston to the cylinder liner
D.remove oil from the cylinder combustion space

4.單項(xiàng)選擇題A diesel engine piston ring face is in direct contact with the ().

A.top of the ring groove
B.cylinder liner oil film
C.bottom of the ring groove
D.back of the ring groove

5.單項(xiàng)選擇題If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a ().

A.loss of suction in the circulating pump
B.leak in the primary cooling system
C.broken raw water pump shaft
D.burned or cracked piston in one cylinder

最新試題

Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the ().

題型:?jiǎn)雾?xiàng)選擇題

The function of diesel engine piston compression rings is to ().

題型:?jiǎn)雾?xiàng)選擇題

Electrically operated safety devices on auxiliary diesel engines function to stop the engine by ().

題型:?jiǎn)雾?xiàng)選擇題

Proper filtering and straining of fuel oil is important because the ().

題型:?jiǎn)雾?xiàng)選擇題

Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to ().

題型:?jiǎn)雾?xiàng)選擇題

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting ().

題型:?jiǎn)雾?xiàng)選擇題

The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as ().

題型:?jiǎn)雾?xiàng)選擇題

If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a ().

題型:?jiǎn)雾?xiàng)選擇題

Lube oil filters remove contaminants more efficiently if the oil being filtered is ().

題型:?jiǎn)雾?xiàng)選擇題

When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?()

題型:?jiǎn)雾?xiàng)選擇題