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單項選擇題

A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（）
Ⅰ.gap
Ⅱ.side

A.Ⅰonly
B.Ⅱ only
C.both Ⅰ and Ⅱ
D.neither Ⅰ nor Ⅱ

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單項選擇題

An acceptable means of tightening connecting rod and main bearing cap bolts is to measure the （）
Ⅰ.torque applied to each nut and bolt assembly
Ⅱstretch of each nut before and after tightening

A.Ⅰonly
B.Ⅱ only
C.both Ⅰ and Ⅱ
D.neither Ⅰ nor Ⅱ

單項選擇題

Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）

A.scavenging
B.forced draft
C.turbo-charging
D.aspiration

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