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单选题
An independent bilge suction is required for （）.
A
ballast tanks
B
sludge tanks
C
machinery space bilges
D
cargo hold bilges
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单选题A centrifugal bilge pump requires priming （）.A
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due to the inability of this type of pump to lift water to cover the suction (eye) of the impellerC
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in order to overcome the potential energy of water in the discharge line
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考题
单选题All bilge suction must be fitted with suitable （）, which in the machinery space would be mud boxes positioned at floor-plate level for easy access.A
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单选题Certain requirements must currently be met by a ship’s steering system.There must be （）independent means of steering, although where two identical power units are provided, an auxiliary unit is not required.A
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单选题Which of the following machinery space operations is required to be logged in the Oil Record Book?（）A
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考题
单选题If a bilge pump failed to build up discharge pressure, you should check for （）.A
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考题
单选题When installed for bilge pumping or ballast duty, centrifugal pumps require a （） to remove air from the suction pipe.A
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单选题If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT （）.A
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the suction strainer
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考题
单选题The emergency bilge suction valve is typically used （）.A
to inject cleaning additives when the bilges are extremely dirtyB
when the main condenser becomes fouled, in order to provide additional cooling water circulationC
to connect the rose box to the independent bilge suctionD
if the bilges become flooded and they can not be emptied by any other means
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单选题A bilge suction line，in a fishing vessel with more than 16 individuals aboard，must have a strainer with an open area not less than how many times the open area of the suction line?（）A
oneB
twoC
threeD
four
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