單項選擇題

When used in conjunction with a turbocharger, the main function of an after-cooler is to （）

A.increase the density of the cylinder air charge
B.prevent turbocharger overheating
C.liminate the need for a pre-cooler
D.remove moisture from air compressed by the turbocharger

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單項選擇題

One of function of diesel engine lubricating oil is to （）

A.induce carbon formation on cylinder walls
B.improve fuel penetration in the combustion space
C.form a friction reducing film between mating surfaces
D.lubricate the fuel injection

單項選擇題

Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）

A.Improper fuel rack positioning
B.Lengthy opening of the exhaust valve
C.Excessively early injection timing
D.Extended light load operation

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When used in conjunction with a turbocharger, the main function of an after-cooler is to （）

你可能感興趣的試題

One of function of diesel engine lubricating oil is to （）

Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）