Before starting an engine by air, the engine must（）
A: be turned by a turning gear for at least one minute
B: be turned by a turning gear for at least two minutes
C: be turned at least one complete turn
D: be turned at least two complete tur
A: be turned by a turning gear for at least one minute
B: be turned by a turning gear for at least two minutes
C: be turned at least one complete turn
D: be turned at least two complete tur
举一反三
- It is abnormal that when the engine is being turned by the turning gear or by hand， （）.
- Start the turning gear, and with some one hand-operating the cylinder lubricators at regular intervals, and with the indicator cocks （）, and with the control gear in the （）position, give the engine at least one complete turn. A: open；“stop” B: closed；“stop” C: open；“start” D: closed；“start&rdquo
- He said that he had turned the main engine one complete revolution with the （）.
- The<br/>indicator cocks are opened, the turning gear engaged and the engine<br/>turned through several complete revolutions, in this way () which<br/>may have collected in the cylinders will be forced out. A: any<br/>fuel oil B: any lube oil C: any water D: any air
- （） in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit compressed air to start the engine.