H AUXILIARY WATER TEMPERATURE TSHH-713表示（）。

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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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• An auxiliary diesel engine may fail to start due to（）

  A . low exhaust back pressure B . high lube oil temperature C . insufficient cranking speed D . excessive fuel atomizatio

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• NE40E的Auxiliary（AUX）端口类型为：（）

  A . EIA/TIA-232DCE B . EIA/TIA-232DTE C . EIA/TIA-422DCE D . EIA/TIA-422DTE

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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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• 辅助给水系统/应急给水系统 auxiliary feed water system/emergency feed water system

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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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• An auxiliary reservoir for starting auxiliary engines should be kept at （）.

  A . low pressure at all times B . full pressure at all times C . low pressure at intermittence D . full pressure at intermittence

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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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• 辅助所 auxiliary block post

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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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• About the jacket water, that of the auxiliary engines usually（） is circulated by pumps, and the main engine usually （）

  A . an engine-driven；as well B . an engine-driven；has an independent pump C . an independent；as well D . an independent；has an engine-driven pum

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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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• 枢纽辅助编组站 terminal auxiliary marshalling station

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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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• 补机摘挂站 picking up and ditaking station for auxiliary locomotive

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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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• 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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• 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 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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• 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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• 辅助调车场 auxiliary yard

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