单选题Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?（）AClogged air intake faltersBPiston blow-byCA defective after-coolerDFaulty exhaust valves
单选题
Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?（）
A
Clogged air intake falters
B
Piston blow-by
C
A defective after-cooler
D
Faulty exhaust valves
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