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單項(xiàng)選擇題

Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?（）

A.Faulty turbocharger turbine diffuser ring
B.Faulty turbocharger compressor ring
C.Insufficient cooling water flow
D.Clogged air intake filters

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單項(xiàng)選擇題

Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?（）

A.Excessive piston blow-by to the manifold
B.Insufficient cooling water flow
C.Accumulated water in the air boxes
D.Clogged air intake filters

單項(xiàng)選擇題

If sludge accumulates on the underside of a diesel engine piston, it will（）

A.cause blow-by
B.chemically attack the piston skirt
C.form an emulsion of lube oil and water
D.raise the piston temperature

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