Auxiliary boilers can be classified as（）

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• Auxiliary diesel engines can be automatically shut down as a result of （）

  A . low lube oil temperature B . low lube oil pressure C . high exhaust temperature D . high cooling water pressure

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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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• 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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• 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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• 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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• Impurities from the boiler water surface can be removed through the （）.

  A . safety valve B . blow down valve C . scum valve D . feed check valve

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• A distorted furnace in a fire-tube auxiliary boiler may be the result of （）

  A . firing for extended periods in the low fire mode B . overheating, due to waterside deposits C . varying the water level above the crown sheet D . carrying excessive alkalinity in the boiler water

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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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• Auxiliary boilers are divided into several classifications, one of which is （）.

  A . water-tube supercritical circulation B . water-tube forced circulation C . fire-tube controlled circulation D . fire-tube express circulatio

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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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• Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?（）

  A . clean the flame scanner photocell window B . Inspect and clean all solenoid valves C . lift the safety valves by hand D . Inspect for oil or water leak

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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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• 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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• 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

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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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