1|Page
NJ Black Seal Exam Newest 2025/2026 Complete
All Questions And Correct Detailed Answers
(Verified Answers) |Already Graded A+||Brand
New Version!
Carryover can lead to: - . . ANSWER ✔ ✔Water
Hammer
If water leaves the boiler at 170 degrees, what temperature
does it return at? - . . ANSWER ✔ ✔150 Degrees
The positioning control cannot function without: - . .
ANSWER ✔ ✔Air
What fire tube boiler is most efficient? - . . ANSWER ✔
✔4 Pass
What is the purpose of a check valve? - . . ANSWER ✔
✔Allows flow in one direction
A solenoid valve is: - . . ANSWER ✔ ✔Is an automatic
gas shutoff valve
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What does PSIA stand for? - . . ANSWER ✔ ✔PSIG +
Atmospheric Pressure
Water column & gauge glass should be blown down: - . .
ANSWER ✔ ✔Daily
What is the most common cause of cast iron boiler failure?
- . . ANSWER ✔ ✔Cracking
What is the most common cause of problems in a hot
water system? - . . ANSWER ✔ ✔AIR
External feedwater treatment can be a ______ process - .
. ANSWER ✔ ✔Cold lime soda, hot lime soda, or ion
exchange.
Natural water may contain: - . . ANSWER ✔ ✔Solids
and other pollutants
Where are the combustion gases on a serpentine boiler? - .
. ANSWER ✔ ✔Below the tubes
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A steam gauge is calibrated in: - . . ANSWER ✔
✔Pounds per square inch
What code is a heating boiler built to? - . . ANSWER ✔
✔ASME Section IV
What test is performed on re-tubed (repaired) boiler and
what is the water temp? - . . ANSWER ✔ ✔Hydrostatic
Test at 70 F
Under what ASME section is the care and operation of
heating boilers? - . . ANSWER ✔ ✔Section VI
The expansion tank in a hot water system allows for the
expansion of? - . . ANSWER ✔ ✔WATER
As the water in a hot water system expands: - . . ANSWER
✔ ✔The pressure remains constant
The most common type of pressure control device used is
the: - . . ANSWER ✔ ✔Mercury Tube
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Heavy soot on the fireside of the tubes: - . . ANSWER ✔
✔Should be removed for better heat transfer
When connecting a Bourdon tube steam gauge to a boiler,
a pigtail is used to: - . . ANSWER ✔ ✔Protect Bourdon
Tube from steam
What is the min. temp. of a hot water boiler operation to
prevent condensation? - . . ANSWER ✔ ✔170 F
The amount of draft is not affected by the height of the
stack. - . . ANSWER ✔ ✔FALSE
An aquastat is sensitive to changes in: - . . ANSWER ✔
✔Water Temperature
Who can adjust a safety valve? - . . ANSWER ✔
✔Manufacturer Representative
The pressuretrol: - . . ANSWER ✔ ✔Turns the boiler on
an off
NJ Black Seal Exam Newest 2025/2026 Complete
All Questions And Correct Detailed Answers
(Verified Answers) |Already Graded A+||Brand
New Version!
Carryover can lead to: - . . ANSWER ✔ ✔Water
Hammer
If water leaves the boiler at 170 degrees, what temperature
does it return at? - . . ANSWER ✔ ✔150 Degrees
The positioning control cannot function without: - . .
ANSWER ✔ ✔Air
What fire tube boiler is most efficient? - . . ANSWER ✔
✔4 Pass
What is the purpose of a check valve? - . . ANSWER ✔
✔Allows flow in one direction
A solenoid valve is: - . . ANSWER ✔ ✔Is an automatic
gas shutoff valve
,2|Page
What does PSIA stand for? - . . ANSWER ✔ ✔PSIG +
Atmospheric Pressure
Water column & gauge glass should be blown down: - . .
ANSWER ✔ ✔Daily
What is the most common cause of cast iron boiler failure?
- . . ANSWER ✔ ✔Cracking
What is the most common cause of problems in a hot
water system? - . . ANSWER ✔ ✔AIR
External feedwater treatment can be a ______ process - .
. ANSWER ✔ ✔Cold lime soda, hot lime soda, or ion
exchange.
Natural water may contain: - . . ANSWER ✔ ✔Solids
and other pollutants
Where are the combustion gases on a serpentine boiler? - .
. ANSWER ✔ ✔Below the tubes
,3|Page
A steam gauge is calibrated in: - . . ANSWER ✔
✔Pounds per square inch
What code is a heating boiler built to? - . . ANSWER ✔
✔ASME Section IV
What test is performed on re-tubed (repaired) boiler and
what is the water temp? - . . ANSWER ✔ ✔Hydrostatic
Test at 70 F
Under what ASME section is the care and operation of
heating boilers? - . . ANSWER ✔ ✔Section VI
The expansion tank in a hot water system allows for the
expansion of? - . . ANSWER ✔ ✔WATER
As the water in a hot water system expands: - . . ANSWER
✔ ✔The pressure remains constant
The most common type of pressure control device used is
the: - . . ANSWER ✔ ✔Mercury Tube
, 4|Page
Heavy soot on the fireside of the tubes: - . . ANSWER ✔
✔Should be removed for better heat transfer
When connecting a Bourdon tube steam gauge to a boiler,
a pigtail is used to: - . . ANSWER ✔ ✔Protect Bourdon
Tube from steam
What is the min. temp. of a hot water boiler operation to
prevent condensation? - . . ANSWER ✔ ✔170 F
The amount of draft is not affected by the height of the
stack. - . . ANSWER ✔ ✔FALSE
An aquastat is sensitive to changes in: - . . ANSWER ✔
✔Water Temperature
Who can adjust a safety valve? - . . ANSWER ✔
✔Manufacturer Representative
The pressuretrol: - . . ANSWER ✔ ✔Turns the boiler on
an off
