單項選擇題When installed for bilge pumping or ballast duty, centrifugal pumps require a （） to remove air from the suction pipe.
A.air chamber
B.head lank
C.primer
D.prime mover
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1.單項選擇題Water enters the rotating impeller through the entry, known as “（）”, at the centre.
A.eye
B.hole
C.balance holes
D.opening
2.單項選擇題Which one is not the normal operation for boiler shutdown?（）
A.Carry out soot blowing if permissible
B.Change fuel supply to diesel oil
C.Close steam stop valves on boiler when pressure is reduced
D.Drain boiler empty when it has cooled down
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Diesel engine air start system check valves are opened by （）
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The ISPS Code consists of a mandatory section-Part A, which shows（）
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The main purpose of port State control is not to（）
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To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
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