The cylinder head, cylinder liner and （） form the combustion chamber.

[单选题]A． crack in a cylinder liner can be caused byA．worn piston ringsB．installation of undersized sealing ringsC．operating the engine at low loadsD．restricted cooling water passages

[单选题]The space between cylinder liner and jacket is called _____.A．the cooling waterB．the circulating waterC．the coolerD．the cooling water space

[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]The space between cylinder liner and jacket is called （）.A . the cooling waterB . the circulating waterC . the coolerD . the cooling water space

[单选题]Cylinder liner cooling is often referred to as （）.A . piston coolingB . sleeve coolingC . central coolingD . jacket cooling

[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]（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.A . The fuel oilB . The lube oilC . The sea waterD . The fresh water

[单选题]Cracks in cylinder and cylinder covers may （） from unequal heating.A . makeB . causeC . resultD . produce

[单选题]The cylinder liners are made of _____ and the cylinder surfaces are sometimes chromium-plated.A．steelB．copperC．cast ironD．stainless steel

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