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Boiler License Test – Questions And Answers
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Boiler License Test – Questions And Answers
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Boiler License Test – Questions And AnswersNatural draft is produced by? ✔️Ans - difference in temperature outside
chimney from inside chimney
If a draft fan is located between the boiler and chimney, what type of draft
system is it? ✔️Ans - Induced draft
boiler fittings are important for: ✔️Ans - safety only
thermostatic traps remove air and cool condensate: true or false ✔️Ans -
True
The main purpose of testing a safety value is to: ✔️Ans - make sure valve
operates freely
when testing a safety valve by hand, you must: ✔️Ans - have at least 75% of
popping pressure
If a license is expired, how long can it be expired before it is null and void?
✔️Ans - 3 years
What is the purpose of a check valve? ✔️Ans - prevent reverse flow, allows
flow in one direction
What is a solenoid valve? ✔️Ans - An automatic gas shutoff valve
What # oil needs to be preheated with what piece of equipment? ✔️Ans - #6
oil with a heater
What type of test is a hardness test? ✔️Ans - A titration test
What is the most important rule in operating boilers? ✔️Ans - keep water at
proper level
what is the capacity of a safety valve measured in? ✔️Ans - Pounds of steam
per house (#steam/hr)
, What prevents a furnace explosion? ✔️Ans - The purge cycle
Ignition failure would cause activation of the: ✔️Ans - Purge Cycle
What is the most common cause of cast iron boiler failure? ✔️Ans - Cracking
What is the most common cause of problems in a hot water system? ✔️Ans -
Air
Where would you place a water temperature indicator? ✔️Ans - At the
boiler supply
A chief engineer is not needed in a low pressure plant: true or false ✔️Ans -
True
The positioning control cannot function without? ✔️Ans - air
what fire tube boiler is most efficient ✔️Ans - 4 pass
What is the maximum size blowdown line? ✔️Ans - 2 1/2 inches
when do you close a boiler vent? ✔️Ans - When steam comes out
Carryover can lead to: ✔️Ans - water hammer
if water leaves the boiler at 170 degrees, what temperature does it return at?
✔️Ans - 150 degrees
Where are the combustion gases on a serpentine boiler? ✔️Ans - below the
tubes
What does PSIA stand for? ✔️Ans - Psig + atmospheric pressure
When should the water column and gauge glass should be blown down?
✔️Ans - Daily
What oil has to be heated? ✔️Ans - #6 oil
Natural water may contain: ✔️Ans - solids and other pollutants
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