单项选择题

The total starting air capacity required for reversible main engines is to be sufficient for at least （）.

A.six consecutive starts
B.eight consecutive starts
C.ten consecutive starts
D.twelve consecutive starts

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单项选择题

A.cylinder heads
B.exhaust valves
C.scavenging air
D.injectors

单项选择题

A.of the diaphragm type
B.of the centrifugal type
C.of the positive displacement type
D.independently driven by electric motors

单项选择题

A.intake stroke
B.exhaust stroke
C.power stroke
D.compression stroke