Boiler License Test Questions With Correct
Answers 100% Pass | 2025/2026
Latest Update With Complete
Solutions.
Natural draft is produced by? - CORRECT ANSWER -
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? -
CORRECT ANSWER -Induced draft
boiler fittings are important for: - CORRECT ANSWER -safety only
thermostatic traps remove air and cool condensate: true or false - CORRECT ANSWER -True
The main purpose of testing a safety value is to: - CORRECT ANSWER -
make sure valve operates freely
when testing a safety valve by hand, you must: - CORRECT ANSWER -
have at least 75% of popping pressure
If a license is expired, how long can it be expired before it is null and void? - CORRECT ANSWER -
3 years
What is the purpose of a checkRvalve? - CORRECT ANSWER -
prevent reverse flow, allows flow in one direction
What is a solenoid valve? - CORRECT ANSWER -An automatic gas shutoff valve
What # oil needs to be preheated with what piece of equipment? - CORRECT ANSWER -
#6 oil with a heater
, What type of test is a hardness test? - CORRECT ANSWER -A titration test
What is the most important rule in operating boilers? - CORRECT ANSWER -
keep water at proper level
what is the capacity of a safety valve measured in? - CORRECT ANSWER -
Pounds of steam per house (#steam/hr)
What prevents a furnace explosion? - CORRECT ANSWER -The purge cycle
Ignition failure would cause activation of the: - CORRECT ANSWER -Purge Cycle
What is the most common cause of cast iron boiler failure? - CORRECT ANSWER -Cracking
What is the most common cause of problems in a hot water system? - CORRECT ANSWER -Air
Where would you place a water temperature indicator? - CORRECT ANSWER -
At the boiler supply
A chief engineer is not needed in a low pressure plant: true or false - CORRECT ANSWER -True
The positioning control cannot function without? - CORRECT ANSWER -air
what fire tube boiler is most efficient - CORRECT ANSWER -4Rpass
What is the maximum size blowdown line? - CORRECT ANSWER -2 1/2 inches
Answers 100% Pass | 2025/2026
Latest Update With Complete
Solutions.
Natural draft is produced by? - CORRECT ANSWER -
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? -
CORRECT ANSWER -Induced draft
boiler fittings are important for: - CORRECT ANSWER -safety only
thermostatic traps remove air and cool condensate: true or false - CORRECT ANSWER -True
The main purpose of testing a safety value is to: - CORRECT ANSWER -
make sure valve operates freely
when testing a safety valve by hand, you must: - CORRECT ANSWER -
have at least 75% of popping pressure
If a license is expired, how long can it be expired before it is null and void? - CORRECT ANSWER -
3 years
What is the purpose of a checkRvalve? - CORRECT ANSWER -
prevent reverse flow, allows flow in one direction
What is a solenoid valve? - CORRECT ANSWER -An automatic gas shutoff valve
What # oil needs to be preheated with what piece of equipment? - CORRECT ANSWER -
#6 oil with a heater
, What type of test is a hardness test? - CORRECT ANSWER -A titration test
What is the most important rule in operating boilers? - CORRECT ANSWER -
keep water at proper level
what is the capacity of a safety valve measured in? - CORRECT ANSWER -
Pounds of steam per house (#steam/hr)
What prevents a furnace explosion? - CORRECT ANSWER -The purge cycle
Ignition failure would cause activation of the: - CORRECT ANSWER -Purge Cycle
What is the most common cause of cast iron boiler failure? - CORRECT ANSWER -Cracking
What is the most common cause of problems in a hot water system? - CORRECT ANSWER -Air
Where would you place a water temperature indicator? - CORRECT ANSWER -
At the boiler supply
A chief engineer is not needed in a low pressure plant: true or false - CORRECT ANSWER -True
The positioning control cannot function without? - CORRECT ANSWER -air
what fire tube boiler is most efficient - CORRECT ANSWER -4Rpass
What is the maximum size blowdown line? - CORRECT ANSWER -2 1/2 inches
