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单选题
The pressure head of a water pump is given in the unit of （）.
A
kg
B
MPa
C
mH20
D
None of the above
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单选题A centrifugal bilge pump requires priming （）.A
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单选题Which of the following terms is used to identify the pressure of the liquid entering a pump?（）A
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单选题The outlet from an expansion tank of a closed freshwater cooling system should be piped to the （）.A
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cylinder jacket inlet mainC
heat exchanger inlet connectionD
jacket water pump suction line
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jacket water outletB
expansion tank inletC
heat exchanger inletD
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单选题（）is used in typical marine pattern self-contained unit.A
a water cooled condenserB
a slop tankC
a expansion tankD
a centrifugal pump
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a clogged suction strainerC
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单选题The static suction head of is the （）A
distance of the suction liquid level above the line of the pumpB
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force necessary to overcome frictional losses in the pump and pipingD
amount in inches of mercury the total suction head is below atmospheric pressure
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单选题If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause maybe （）.A
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单选题Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected?（）A
Correct the cause of the scoring and repair the sleeve or replace with a new oneB
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考题
单选题The pressure head of a water pump is given in the unit of （）.A
kgB
MPaC
mH20D
None of the above
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单选题The pressure head of a pump is given in the unit of （）.A
kgB
MPaC
meter fluid columnD
None of the above is true
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单选题The volute of centrifugal pump also acts as a diffuser converting （）into pressure head.A
mechanical energyB
heat energyC
potential energyD
kinetic head
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