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单选题
The boiler is fired （） the demand for steam exceeds that available from exhaust gas heating.
A
whenever
B
however
C
wherever
D
whether
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in the event of a flame failureB
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yellowish flameB
golden yellow flameC
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单选题What is NOT a function of the steam drum of a marine water-tube boiler（）.A
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salinity is highC
safety valve simmersD
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单选题Which one is not the normal operation for boiler shutdown?（）A
Carry out soot blowing if permissibleB
Change fuel supply to diesel oilC
Close steam stop valves on boiler when pressure is reducedD
Drain boiler empty when it has cooled down
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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
monkeyB
donkeyC
waste heatD
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单选题Excessive vibration of an automatically fired auxiliary boiler can be caused by （）A
air or water in the furnaceB
combustion pulsesC
fuel oil pump failureD
flame failure
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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
feedwater is too cold
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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
help the feed water flash to steam
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单选题The water level in a steaming auxiliary boiler will always （）A
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remain constant as long as the feed pump operatesC
fall when the steam pressure is decreasedD
vary as the steam demand changes
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单选题（） should be tested and adjusted when the boiler survey is carried out.A
The boiler oil tankB
The steam pipeC
The fire sideD
The safety valves
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An economizerB
An attemperatorC
A water dramD
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oxygen in the waterB
poor boiler designC
density too highD
excessive steam demand
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rise as the boiler warms upC
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incorrect nozzle positionC
clogged fuel nozzleD
broken high tension lead
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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 boilerB
abnormally high feed water temperatureC
abnormally high boiler water temperatureD
steam demand exceeding feed pump capacity
考题
单选题Prior to lighting off a cold automatically fired auxiliary boiler, you should （）.A
check and regulate the water levelB
close the air cock once fires are litC
blowdown the gage glassD
crack the steam stop to assure protective steam flow
考题
单选题The furnace of an oil fired boiler should be （） before the operating burner is lit.A
filled with waterB
purgedC
cleared of airD
None of the above is true
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