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单选题
The deck control valve to be（）after being repaired.
A
moved and fitting again
B
removed and refitted
C
reproduced and put on again
D
return and attached again
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单选题（） are used to limit the pressure in any particular portion and mainly control the pressure after the valve.A
Relief valvesB
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moved and fitted againB
removed and refittedC
reproduced and put on againD
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tighted formallyB
shut tightlyC
combined properlyD
closed suitably
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Spring-centered valveB
Unloading valveC
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Relief valveB
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main stem stop valveB
auxiliary steam stop valveC
feed check or control valveD
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Open the tank isolation valve to the fully open positionD
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单选题If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.A
combustion control air systemB
supply air systemC
ships service air systemD
low pressure deck air system
考题
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bilge well connected to that valve, plus the second bilge well being pumped will be completely emptiedB
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produce a scavenging effect in the combustion spaceB
equalize cylinder and exhaust manifold pressuresC
alleviate the difference in valve size between the intake and exhaustD
flush out condensate that collects after each compression stroke
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