An efficient seal between the cylinder

1、The space between cylinder liner and j

The space between cylinder liner and jacket is called （）.Athe circulating tankBthe scavenge boxCthe cooling water spaceDthe cooler

2、The interface between the liquid seal

The interface between the liquid seal (water) and the oil should be positioned （） possible to the bowl periphery.Aas far asBas soon asCas close asDas closer a

3、The purpose of the deck seal in an ine

The purpose of the deck seal in an inert gas system is to prevent（）.Aflammable vapors from entering machinery spaceBflue gas escaping to atmosphereCinert gas escaping to atmosphereDair entering inert gas system

4、An increased differential between the

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

5、The sealing rings are in four parts an

The sealing rings are in four parts and pressed together around the piston rods by means of _____AnutsBboltsCcoil springsDstuffing boxes

6、The mechanical efficiency of an engine

The mechanical efficiency of an engine is always less than 100% （） losses occurring in the form friction.AbecauseBsinceCdue toDowing to