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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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Excessive alkalinity of the water in an auxiliary boiler can cause ().
A . caustic embrittlement of the boiler metal
B . acidic corrosion of the boiler metal
C . hard scale deposits on the boiler tubes
D . etching of the heat exchange surface
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The water level in a steaming auxiliary boiler will always ()
A . rise when the steam pressure is increased
B . remain constant as long as the feed pump operates
C . fall when the steam pressure is decreased
D . vary as the steam demand change
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Burner ignition failure in an automatically fired auxiliary boiler would be caused by()
A . a burned out solenoid in the oil supply valve
B . high temperature excess air
C . incorrectly setting the hot-well dump valve
D . an incorrectly positioned burner snubber realy
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After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate refiring of a burner in order for the ().
A . furnace to be re-purged
B . electric charge to buildup in the igniter
C . fuel pump to restart
D . dram level to stabilize
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When there is a flame failure in an automatically fired auxiliary boiler, the ().
A . air supply is shut off
B . fuel supply is shut off
C . water supply is shut off
D . safety valve lift
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The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler ()
A . salinity is abnormally high
B . steam demand is too high
C . water level is abnormally low
D . feedwater flow is low
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The water in an auxiliary boiler should be tested daily for ().
A . dissolved oxygen
B . chlorides
C . sludge
D . dissolved nitroge
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The water in an auxiliary boiler should be chemically tested daily for alkalinity and()
A . soap hardness
B . nitrog encontent
C . chloride content
D . dissolved CO
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A () boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port.
A . monkey
B . donkey
C . waste heat
D . mai
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Bottom blow valves are installed on auxiliary water-tube boilers to ()
A . completely drain the boiler in an emergency
B . prevent sludge from forming in the drum
C . remove floating impurities from the boiler water surface
D . remove settled solids from the water drum
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A firebox explosion in an automatically fired auxiliary boiler may be the result of ()
A . excessive purging before lighting off
B . insufficient trail for ignition period
C . a faulty transformer in the ignition circuit
D . insufficient purging before lighting off
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Flame failure in an automatically fired auxiliary boiler can from a/an ()
A . incorrect electrode setting
B . incorrect nozzle position
C . clogged fuel nozzle
D . broken high tension lead
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Prior to lighting off a cold automatically fired auxiliary boiler, you should ().
A . check and regulate the water level
B . close the air cock once fires are lit
C . blowdown the gage glass
D . crack the steam stop to assure protective steam flow
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Which action should be taken when an auxiliary boiler in is operation?()
A . Clean all electrical connections
B . Lift the relief valves by hand
C . Inspect and clean all solenoid valves
D . Inspect for oil and water leak
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The purpose of the safety relief valves installed on an auxiliary boiler is to ().
A . relieve excess fuel oil pressure during the “off” fire cycle
B . admit water to the dry pipe
C . throttle the forced draft fan output for proper combustion
D . reduce excess steam pressure in the boiler
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Prior to lighting off a cold automatically fired auxiliary boiler, yon should ().
A . check and regulate the water level
B . close the air cock once fires are lit
C . blowdown the gage glass
D . crack the steam stop to assure protective steam flow
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Improper maintenance of an automatic auxiliary boiler oil burner could result in ().
A . fuel pump failure
B . fan motor failure
C . increased feedwater consumption
D . decreased boiler efficiency
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The procedures recommended for auxiliary boilers having high salinity include ().
A . treating with oxygen scavengers
B . securing the boiler and giving it a blowing down
C . increasing the pH
D . reducing the phosphate level
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After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate re-firing of a burner in order for the ().
A . furnace to be re-purged
B . electric charge to buildup in the igniter
C . fuel pump to restart
D . drum level to stabilize
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Auxiliary boilers can be classified as()
A . water-tube natural circulation boilers
B . fire-tube boilers
C . water-tube forced circulation boilers
D . all of the above
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Auxiliary boilers are divided into several classifications, one of which is()
A . fire-tube controlled circulation
B . fire-tube supercritical circulation
C . water-tube natural circulation
D . water-tube express circulatio
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Excessive vibration of an automatically fired auxiliary boiler can be caused by ()
A . air or water in the furnace
B . combustion pulses
C . fuel oil pump failure
D . flame failure
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The boiler water alkalinity in a coil-type auxiliary boiler should be maintained at the pH recommended by the boiler manufacturer to()
A . precipitate silica from solution
B . reduce corrosion in the heating coil
C . prevent clogging and erosion in the coil
D . maintain zero water hardne