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單項(xiàng)選擇題

If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an （）

A.cavitation erosion in the water jackets
B.excess corrosion inhibitor in the coolant
C.dirty jacket water cooler
D.defective turbocharger

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單項(xiàng)選擇題

Which of the following beneficial results can be expected from supercharging a previously naturally aspirated engine?（）

A.Increased turbulence
B.increased mechanical efficiency
C.Increased brake mean effective pressure
D.All of the above

單項(xiàng)選擇題

Late fuel injection in a diesel engine is indicated by low firing pressure with（）

A.high exhaust temperature
B.low exhaust temperature
C.fuel knock in each cylinder
D.mechanical knock in each cylinder

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