E．ach cylinder is closed at the top by a _____, made of a special heat-resistant steel.

A．cylinder liner

B．coupling flange

C．cylinder cover

D．piston crown

[单选题]Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.A . cylinder linerB . coupling flangeC . cylinder coverD . piston crow

[单选题]On the top of the cylinder is mounted the cylinder cover which is pressed onto （） of the cylinder liner by means of nuts and studs.A . the camshaftB . the flangeC . the ridgeD . the bulge

[单选题]It is very important that each cylinder should be （） scavenged before the charged air is compressed.A . wellB . goodC . excellentD . respectively

[单选题]It is very necessary that each cylinder （） before the charged air is compressed.A . is scavengedB . is atomized with fuel oilC . be scavengedD . be atomized with fuel oil

[单选题]The bore of each cylinder is formed in a liner which can be （） when worn out.A . weldedB . replacedC . drilled againD . bored

[单选题]In each cylinder cover there are two or three holes for （）A . the exhaust valvesB . the fuel valvesC . indicator cocksD . the fuel pum

[单选题]E．ach cylinder liner on the marine medium speed engines _____.A．is usually cooled by sea waterB．can be replaced when worn outC．is in direct contact with the water in the bore of the cylinderD．can t expand when heated

[单选题]In each cylinder cover is a large central opening for mounting （）A . the indicating cockB . the starting valveC . air inlet valveD . the exhaust valve

[单选题]Each cylinder liner on the marine medium speed engines （）.A . is usually cooled by sea waterB . can be replaced when worn outC . is in direct contact with the water in the bore of the cylinderD . can t expand when heated

[单选题]Each cylinder has one starting valve which is usually opened by air pressure and closed by （）A . nuts and boltsB . new jointsC . spring forceD . sealing ring