1.Generating tubes in waste heat boilers are finned to ____________.

A.reduce gas flow turbulence

B.prevent exhaust gas corrosion

C.increase the rate of combustion

D.increase the rate of heat transfer

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]D.increase the rate of heat transfer[/bg_collapse]


2.It is desirable for an auxiliary boiler safety valve to pop open and reseat quickly to __________.

A.give warning that excessive boiler pressure has been reached

B.prevent wire drawing of the disc and seat

C.prevent valve pounding

D.provide sufficient blowdown

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]B.prevent wire drawing of the disc and seat[/bg_collapse]


3.A failure to any component of a flame safeguard control for an automatically fired auxiliary boiler, will result in ______________.

A.the prevention of automatic restart

B.an immediate furnace explosion

C.uncontrolled firing

D.automatic restart

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]A.the prevention of automatic restart[/bg_collapse]


4.The amount of oil consumed by a return flow-type fuel atomization system, fitted with both supply and return meters, can be determined by the ____________.

A.supply meter reading only

B.return meter reading only

C.sum of the supply and return meter readings

D.difference between the supply and return meter readings

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]
D.difference between the supply and return meter readings[/bg_collapse]


5.The flame safeguard control system of a large automatic auxiliary boiler will provide fuel shut off in the case of high ____________.

A.water

B.voltage

C.fuel pressure

D.steam pressure

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]D.steam pressure[/bg_collapse]


6.If the fire goes out in an automatically fired auxiliary boiler and the burner continues to supply fuel, there is a potential danger of ______________.

A.overpressure and dry firing

B.a severe furnace explosion

C.spalling damage to the brickwork

D.heat damage to the atomizer

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]
B.a severe furnace explosion[/bg_collapse]


7.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 gauge glass

D.crack the steam stop to assure protective steam flow

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]A.check and regulate the water level[/bg_collapse]


8.When an automatically fired boiler has a flameout, which of the following actions should occur FIRST?

A.The fuel valve should be de-energized.

B.The purge cycle should begin.

C.An alarm should ring.

D.The fuel oil pump should stop.

[bg_collapse view=”button-orange” color=”#49494a” expand_text=”View Answer” collapse_text=”Hide Answer” ]A.The fuel valve should be de-energized.[/bg_collapse]


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