In each cylinder cover is a large central opening for mounting _____.

[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]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]The cylinder cover is not provided with ( )A．fuel valveB．the starting valveC．lubricator

[单选题]The cylinder cover is not provided with （）.A . fuel valveB . lubricatorC . indicator valveD . the starting valve

[单选题]The opening or closing of the cylinder starting valve is controlled by （）.A . the starting air distributorB . the cut-off valve on the air mainC . the main starting valveD . the air bottle control valve

[单选题]Opening of the cylinder （） will admit compressed air into the cylinder.A . safety valveB . indicator cockC . blow-down valveD . start valve

[单选题]In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.A . inefficiencyB . oilinessC . detergencyD . purity

[单选题]E．ach cylinder is closed at the top by a _____, made of a special heat-resistant steel.A．cylinder linerB．coupling flangeC．cylinder coverD．piston crown

[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