BLACK SEAL TEST FULL SOLUTION SCRIPT
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
⩥ If a one square inch column of water is one foot tall, how much does
it weigh? Answer: .433 lbs
⩥ Where is the flame sensing device located on a boiler? Answer: front
⩥ Cracking of the boiler metal can be caused by: Answer: caustic
embrittlement
⩥ How would you test the operation of the flame failure device?
Answer: by shutting off the fuel supply valve
⩥ Where are the combustible gases located in a water tube boiler?
Answer: flowing around the tubes
⩥ What are you preventing by increasing the pressure within a cold
boiler gradually? Answer: thermal shock
⩥ When performing a hydrostatic test, the pressure on the boiler should
not exceed: Answer: 10 psi above 1.5 times the MAWP
,⩥ A boiler operator log must be maintained in a boiler room containing
over: Answer: 100 horsepower
⩥ If a flame sensing device notices that there is a flame failure, what
device does it secure? Answer: fuel solenoid valve
⩥ What type of draft has a fan between the boiler and the chimney?
Answer: induced
⩥ What is used to control alkalinity? Answer: caustic soda
⩥ What is the best way to decide the blowdown frequency for a boiler?
Answer: boiler water analysis
⩥ What device is used to obtain sufficient static head for the returning
condensate in a two-pipe gravity return system? Answer: return trap
⩥ What is the maximum temperature a hot water boiler can be to qualify
in New Jersey as low pressure? Answer: 250 degrees
⩥ What type of boiler is an HRT (horizontal return tube)? Answer: fire-
tube
, ⩥ What is the purge cycle in a boiler meant to do? Answer: remove
combustible gases
⩥ Which valve is allowed between the boiler and safety valve? Answer:
no valve
⩥ Which is a common type of feedwater regulator in a low pressure
plant? Answer: pressure sensitive device
⩥ When open, an OS&Y (outside stem & yoke) valve offers ----- to the
flow of steam. Answer: no resistance
⩥ What section of the ASME code do hot water heating boilers fall
under? Answer: Section IV
⩥ Which describes the combustion chamber of a serpentine tube heating
boiler? Answer: located below the tubes
⩥ What should you do if you walked into a boiler room and the safety
valves were popped? Answer: secure the fire at the burner
⩥ What letter stamp denotes a low pressure boiler? Answer: H
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
⩥ If a one square inch column of water is one foot tall, how much does
it weigh? Answer: .433 lbs
⩥ Where is the flame sensing device located on a boiler? Answer: front
⩥ Cracking of the boiler metal can be caused by: Answer: caustic
embrittlement
⩥ How would you test the operation of the flame failure device?
Answer: by shutting off the fuel supply valve
⩥ Where are the combustible gases located in a water tube boiler?
Answer: flowing around the tubes
⩥ What are you preventing by increasing the pressure within a cold
boiler gradually? Answer: thermal shock
⩥ When performing a hydrostatic test, the pressure on the boiler should
not exceed: Answer: 10 psi above 1.5 times the MAWP
,⩥ A boiler operator log must be maintained in a boiler room containing
over: Answer: 100 horsepower
⩥ If a flame sensing device notices that there is a flame failure, what
device does it secure? Answer: fuel solenoid valve
⩥ What type of draft has a fan between the boiler and the chimney?
Answer: induced
⩥ What is used to control alkalinity? Answer: caustic soda
⩥ What is the best way to decide the blowdown frequency for a boiler?
Answer: boiler water analysis
⩥ What device is used to obtain sufficient static head for the returning
condensate in a two-pipe gravity return system? Answer: return trap
⩥ What is the maximum temperature a hot water boiler can be to qualify
in New Jersey as low pressure? Answer: 250 degrees
⩥ What type of boiler is an HRT (horizontal return tube)? Answer: fire-
tube
, ⩥ What is the purge cycle in a boiler meant to do? Answer: remove
combustible gases
⩥ Which valve is allowed between the boiler and safety valve? Answer:
no valve
⩥ Which is a common type of feedwater regulator in a low pressure
plant? Answer: pressure sensitive device
⩥ When open, an OS&Y (outside stem & yoke) valve offers ----- to the
flow of steam. Answer: no resistance
⩥ What section of the ASME code do hot water heating boilers fall
under? Answer: Section IV
⩥ Which describes the combustion chamber of a serpentine tube heating
boiler? Answer: located below the tubes
⩥ What should you do if you walked into a boiler room and the safety
valves were popped? Answer: secure the fire at the burner
⩥ What letter stamp denotes a low pressure boiler? Answer: H
