單項選擇題

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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單項選擇題

The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner（）

A.in the event of a flame failure
B.in the event of a stack fire
C.when the water level reach the crown sheet
D.when the feed pump discharge pressure drops to a preset minimum

單項選擇題

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 the event of a flame failure in an auxiliary water-tube boiler, you must（）

你可能感興趣的試題

The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner（）

Burner ignition failure in an automatically fired auxiliary boiler would be caused by（）