NJ BLACK SEAL LOW LATEST
PRESSURE EXAM QUESTIONS
AND ANSWERS 2026 - 2027
When a baffle breaks in a fire tube boiler, what condition occurs? -
ANSWERS-increase in stack temperature/decrease in efficiency
A steam pressure gauge is designed to show steam calibrated in: -
ANSWERS-pounds per square inch
When performing a hydrostatic test, the pressure on the boiler should not
exceed: - ANSWERS-10 psi above 1.5 times the MAWP
How is the relieving capacity of a safety valve measured? - ANSWERS-
lbs/hr that it is discharging
Why are there duplex strainers between the oil tank and the fuel oil
pump? - ANSWERS-to clean them without stopping flow
How is natural draft produced? - ANSWERS-by the difference in
temperature of the gas in the chimney to that of air outside
To produce one pound of steam, it is necessary to evaporate how much
water? - ANSWERS-one pound
END OF
PAGE 1
, NJ BLACK SEAL LOW LATEST
PRESSURE EXAM QUESTIONS
AND ANSWERS 2026 - 2027
Which is an appropriate chemical used to control scale? - ANSWERS-
phosphate
What type of boiler is an HRT (horizontal return tube) boiler? -
ANSWERS-water tube
What describes the combustion chamber of a serpentine tube heating
boiler? - ANSWERS-it is located below the tubes
In a hydronic system, what allows for the expansion of water? -
ANSWERS-expansion tank
The two scales on the boiler pressure control: - ANSWERS-set the
operating steam pressure range
If a column of water is 4 feet tall and at the top of the column is a gauge
that reads 12 psi, what is the pressure at the base? - ANSWERS-about
14 psi
END OF
PAGE 2
PRESSURE EXAM QUESTIONS
AND ANSWERS 2026 - 2027
When a baffle breaks in a fire tube boiler, what condition occurs? -
ANSWERS-increase in stack temperature/decrease in efficiency
A steam pressure gauge is designed to show steam calibrated in: -
ANSWERS-pounds per square inch
When performing a hydrostatic test, the pressure on the boiler should not
exceed: - ANSWERS-10 psi above 1.5 times the MAWP
How is the relieving capacity of a safety valve measured? - ANSWERS-
lbs/hr that it is discharging
Why are there duplex strainers between the oil tank and the fuel oil
pump? - ANSWERS-to clean them without stopping flow
How is natural draft produced? - ANSWERS-by the difference in
temperature of the gas in the chimney to that of air outside
To produce one pound of steam, it is necessary to evaporate how much
water? - ANSWERS-one pound
END OF
PAGE 1
, NJ BLACK SEAL LOW LATEST
PRESSURE EXAM QUESTIONS
AND ANSWERS 2026 - 2027
Which is an appropriate chemical used to control scale? - ANSWERS-
phosphate
What type of boiler is an HRT (horizontal return tube) boiler? -
ANSWERS-water tube
What describes the combustion chamber of a serpentine tube heating
boiler? - ANSWERS-it is located below the tubes
In a hydronic system, what allows for the expansion of water? -
ANSWERS-expansion tank
The two scales on the boiler pressure control: - ANSWERS-set the
operating steam pressure range
If a column of water is 4 feet tall and at the top of the column is a gauge
that reads 12 psi, what is the pressure at the base? - ANSWERS-about
14 psi
END OF
PAGE 2
