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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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In an auxiliary diesel engine, the reason for knurling the piston skirt is to()
A . improve skirt lubrication
B . allow for expansion
C . transmit forces evenly
D . improve the piston seal
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In an oily water separator the oil will travel () to the oil collecting spaces.
A . upwards
B . downwards
C . outwards
D . forward
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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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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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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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Water accumulation in the cylinder of a secured engine is an indication that the ()
A . soft water pump was not secured along with the engine
B . jacket water thermostat has failed
C . cylinder liner may be cracked
D . raw water pump is over-speeding just prior to engine shutdow
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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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In an auxiliary boiler steam and water system, the highest pressure will be in the ().
A . steam stop valve
B . dry pipe
C . feedwater system
D . generating tube
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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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Excessive valve lash in an auxiliary diesel engine will cause the valves to open()
A . later and close sooner
B . sooner and close later
C . sooner and close sooner
D . later and close later
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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 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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A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the().
A . north side of the mark
B . west side of the mark
C . east side of the mark
D . south side of the mark
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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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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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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
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The rate of heat transfer in a water-tube auxiliary boiler can be increased by ().
A . operating the boiler at less than normal water level
B . installing fins on the firesides of water-tubes
C . increasing the amount of excess air to the burners
D . treating the boiler water with chemical oxygen scavenger
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Ballast water can only be()in cargo tanks in exceptional cases where the particular character of the operation of an oil tanker renders it necessary to carry ballast water in excess of the quantity re
A.carried
B.contained
C.filled
D.stuffed