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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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Failure of the burner flame in an auxiliary boiler would probably be a result of()
A . water in the fuel oil
B . broken high tension leads
C . incorrect electrode setting
D . full fuel pressure at the nozzle
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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 in an operating auxiliary boiler should be tested for alkalinity and chloride content each().
A . hour
B . day
C . week
D . month
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Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in ()
A . increased fuel consumption
B . increased feed water consumption
C . fuel pump failure
D . combustion control system failure
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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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The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of ().
A . seawater contamination
B . frequent surface blows
C . dissolved oxygen deaeration
D . frequent bottom blow
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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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A smoking burner with a pulsating flame in auxiliary boiler, is an indication that the()
A . fuel oil supply temperature is normal
B . burner electrode is incorrectly positioned
C . fuel/air ratio is incorrect
D . ignition current is too low
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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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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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In the event of a flame failure in an auxiliary water-tube boiler, you must()
A . relight the boiler immediately to prevent loss of steam pressure
B . relight the fire off the brickwork as the bricks are cherry red
C . purge the furnace of any combustible gases before attempting to relight the fire
D . speed up the feed pump to prevent dry firing when the burner flame is reestablished
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The water in an auxiliary boiler should be tested for chloride content to determine ().
A . total dissolved solids
B . salt contamination
C . water hardness
D . chlorine contaminatio
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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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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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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 purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to()
A . cool the furnace to prevent pre-ignition
B . remove explosive vapors from the furnace
C . evaporate accumulated unburned fuel oil
D . provide sufficient air in the furnace to allow ignition of the fuel