單項選擇題If the engine does start on air, but combustion does not immediately begin, the cause may be ().

A.failure of the fuel pumps
B.starting air pressure too low
C.stop valve in air line closed
D.the turning gear still engaged


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題If the engine does not start on air, it may be due to ()

A.low compression of the fuel pumps
B.incorrect timing of fuel pumps
C.the starting air valves stuck
D.air-locks in fuel oil pipeline

2.單項選擇題If the engine () for a long period, there will be a danger of frost.

A.must to stand inoperative
B.has to stand inoperative
C.must be stood idle
D.will stand idle

4.單項選擇題If diesel oil in this tank is used, the () of the oil must not exceed 120 degree F.

A.viscosity
B.flash point
C.acid value
D.temperature

5.單項選擇題Of a kind of liquid is used to cool the diesel engine, it is invariably called ()

A.lubricant
B.coolant
C.combustion product
D.second refrigerant