NJ Black Seal Exam Preparation Version 2 Newest
2026-2027 With Complete Questions And Correct
Detailed Answers| Brand New Version!
What is the maximum horsepower a low pressure licensed operator can
operate to? - ANSWER-No limit
How often do you check the low water cut-off? - ANSWER-Daily
Where is the make-up water in a hot water boiler? - ANSWER-In the
return line
What is the maximum size blowdown line? - ANSWER-2 1/2 inches
T/F: A Chief Engineer is not needed in a low pressure plant. - ANSWER-
True
When do you close a boiler vent? - ANSWER-When the steam comes
out
What protects sewer lines from high temperatures and pressures from
blowdowns? - ANSWER-Blowdown tank
1|Page
,How much horsepower do you need to obtain a black seal (low or high
pressure) license? - ANSWER-Over 100 horsepower
What happens when you have a closed oil vent? - ANSWER-Oil Spill
Safety valves should be tested: - ANSWER-Once a month
What is the most important fitting on a boiler? - ANSWER-Safety Valve
Boiler water should have a pH of: - ANSWER-11
What happens if a steam trap continuously blows through? - ANSWER-
Steam vents from the condensate tank
A rotary cup burner atomizes fuel: - ANSWER-By means of a spinning
cup/high velocity air
Where does the fuel atomize? - ANSWER-At the burner tip
Retubed or new boilers are cleaned with: - ANSWER-Alkaline detergent
2|Page
, Vacuum gauges are calibrated in inches of: - ANSWER-Mercurey below
What does oxygen cause? - ANSWER-Pitting of boiler metal
Where is the jurisdiction (registration) # on a boiler? - ANSWER-On the
front of the boiler.
Cast iron sectional boilers are built for what type of draft firing? -
ANSWER-Mechanical forced and/or induced
A boiler with water surrounding the outside of the tubes is called a
_____ boiler. - ANSWER-Fire Tube
Who is authorized to readjust the setting of a safety valve on a pressure
vessel? - ANSWER-An authorized manufacturer's representative
Cracking of the boiler metal along the seams can be caused by: -
ANSWER-Oxygen pitting
Soot caked heating surfaces can lead to: - ANSWER-a decrease in boiler
capacity
3|Page
2026-2027 With Complete Questions And Correct
Detailed Answers| Brand New Version!
What is the maximum horsepower a low pressure licensed operator can
operate to? - ANSWER-No limit
How often do you check the low water cut-off? - ANSWER-Daily
Where is the make-up water in a hot water boiler? - ANSWER-In the
return line
What is the maximum size blowdown line? - ANSWER-2 1/2 inches
T/F: A Chief Engineer is not needed in a low pressure plant. - ANSWER-
True
When do you close a boiler vent? - ANSWER-When the steam comes
out
What protects sewer lines from high temperatures and pressures from
blowdowns? - ANSWER-Blowdown tank
1|Page
,How much horsepower do you need to obtain a black seal (low or high
pressure) license? - ANSWER-Over 100 horsepower
What happens when you have a closed oil vent? - ANSWER-Oil Spill
Safety valves should be tested: - ANSWER-Once a month
What is the most important fitting on a boiler? - ANSWER-Safety Valve
Boiler water should have a pH of: - ANSWER-11
What happens if a steam trap continuously blows through? - ANSWER-
Steam vents from the condensate tank
A rotary cup burner atomizes fuel: - ANSWER-By means of a spinning
cup/high velocity air
Where does the fuel atomize? - ANSWER-At the burner tip
Retubed or new boilers are cleaned with: - ANSWER-Alkaline detergent
2|Page
, Vacuum gauges are calibrated in inches of: - ANSWER-Mercurey below
What does oxygen cause? - ANSWER-Pitting of boiler metal
Where is the jurisdiction (registration) # on a boiler? - ANSWER-On the
front of the boiler.
Cast iron sectional boilers are built for what type of draft firing? -
ANSWER-Mechanical forced and/or induced
A boiler with water surrounding the outside of the tubes is called a
_____ boiler. - ANSWER-Fire Tube
Who is authorized to readjust the setting of a safety valve on a pressure
vessel? - ANSWER-An authorized manufacturer's representative
Cracking of the boiler metal along the seams can be caused by: -
ANSWER-Oxygen pitting
Soot caked heating surfaces can lead to: - ANSWER-a decrease in boiler
capacity
3|Page
