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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
high steam pressure in the boiler
B
abnormally high feed water temperature
C
abnormally high boiler water temperature
D
steam demand exceeding feed pump capacity
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sulfite or hygroscopic sulfiteC
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dissolved oxygenB
chloridesC
sludgeD
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water level is abnormally lowD
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safety valve simmersD
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单选题If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be ().A
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单选题A () boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port.A
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combustion pulsesC
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furnace to be re-purgedB
electric charge to buildup in the igniterC
fuel pump to restartD
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单选题A feed pump for an auxiliary boiler might lose suction if the ().A
boiler water level is lowB
feedwater is too hotC
boiler steam demand is lowD
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High oxygen concentrationB
Low pHC
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All of the above
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单选题The boiler feed pump discharge pressure is higher than the steam drum pressure to ().A
ensure feed water flow into the boilerB
keep the steam drum pressure highC
prevent water hammer in the feed lineD
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单选题Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in ()A
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单选题Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?()A
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考题
单选题Excessive alkalinity of the water in an auxiliary boiler can cause ().A
caustic embrittlement of the boiler metalB
acidic corrosion of the boiler metalC
hard scale deposits on the boiler tubesD
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单选题As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: () (1) secure oil to fires (2) increase feed pump pressureA
(1)B
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(2)D
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