A . safety valve
B . indicator cock
C . blow-down valve
D . start 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]The cylinder head, cylinder liner and () form the combustion chamber.A . frameB . pistonC . crankcaseD . explosion plate
[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 opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by ().A . direct action of cam shaftB . compressed air pressureC . hydraulic “push rods”D . direct action of the main piston movin
[单选题]I must admit my whole heart is( )being a medical biologist.A.set offB.put o
[单选题]The trip to that city was eye-opening for everyone, and near its end, all the young people in our group began to reflect on what it had meant. We __21___the first night we had arrived. We had all gone into the markets of the city ___22__the young peo
[单选题]The cylinder cover is not provided with ( )A.fuel valveB.the starting valveC.lubricator
[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 withdrawing of the cylinder liners, in general, depends on their ().This may amount to approximately 1/120 of the diameter in some engines.A . correct maneuveringB . wearC . working efficiencyD . maintenance