單項(xiàng)選擇題

Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）

A.starting the engine while hot
B.knurling the piston skirt
C.operating the engine overheated
D.scuff resistant piston rings

你可能感興趣的試題

單項(xiàng)選擇題

Exhaust pipes for separate diesel engines can be combined only when （）

A.space limitations prevent separately run pipes
B.the engines are small auxiliary units
C.they are arranged to prevent gas backflow to each engine
D.a waste heat boiler is installed

單項(xiàng)選擇題

An increase in crankcase pressure generally indicates（）

A.worn connecting rod bearings
B.worn engine cylinder liners
C.high cylinder firing pressure
D.stuck spring-loaded manhole covers

<cite id="iaaai"></cite>