單項選擇題

High exhaust back pressure will result in an increase in （）

A.turbocharger efficiency
B.engine power output
C.carbon deposits on fuel injectors
D.cylinder scavenging

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單項選擇題

An increased differential between the inlet and outlet of a strainer usually indicates the strainer is （）

A.holed
B.fouled
C.clean
D.dry

單項選擇題

Trunk type diesel engine pistons are effectively cooled when heat is（）

A.radiated through the engine block
B.transferred to water cooled cylinder walls
C.conducted through the piston crown
D.transferred to escaping exhaust gases