The water in an auxiliary boiler should be tested for chloride content to determine （）.

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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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• In a diesel engine, an integral liner is one in which the cooling water （） Ⅰ.flows through the cylinder liner jackets Ⅱ.touches the outer side of the liner

  A . Ⅰ only B . Ⅱ only C . both Ⅰ and Ⅱ D . neither Ⅰ and Ⅱ

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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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