The boiler is fired _____ the demand for steam exceeds that available from exhaust gas hea

Prior to lighting off a cold automatically fired auxiliary boiler, you should _____.

A.check and regulate the water level

B.close the air cock once fires are lit

C.blowdown the gage glass

D.crack the steam stop to assure protective steam flow

The furnace of an oil fired boiler should be _____ before the operating burner is lit.

A.filled with water

B.purged

C.cleared of air

D.None of the above is true

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

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

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

A.intercooler

B.open air

C.oil fired boiler

D.B and C

A.cool the furnace to prevent pre-ignition

B.remove explosive vapors from the furnace

C.evaporate accumulated unburned fuel oil

D.provide sufficient air in the furnace to allow ignition of the fuel

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

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