NJ Black Seal Low Pressure Exam (Actual Exam
2026) | Complete Questions and Correct
Answers | Updated Version
What is the main purpose of a check valve on the boiler feedwater line?
---------CORRECT ANSWER-----------------allow flow in one direction only
The main function of a water column on a steam pressure boiler is to: --
-------CORRECT ANSWER-----------------slow down movement o water to
get an accurate reading of water levels
A steam pressure gauge is designed to show steam calibrated in: ---------
CORRECT ANSWER-----------------pounds per square inch
The primary function of the MBCS (micro burner combustion system) is:
---------CORRECT ANSWER-----------------combustion safety
What is the purpose of an aquastat? ---------CORRECT ANSWER------------
-----controls water temperature
,What is the name of the device used to keep live steam from getting
into a pressure gauge? ---------CORRECT ANSWER-----------------siphon
loop
What is the minimum temperature at which a hot water heating boiler
should be operated at to prevent flue gas condensation? ---------
CORRECT ANSWER-----------------170 degrees
What is the name of the science that is used for heating while using
water as a conveying medium? ---------CORRECT ANSWER-----------------
hydronics
The high limit setting on a low pressure steam boiler must not exceed?
---------CORRECT ANSWER-----------------15 psig
A safety valve on a low pressure hot water boiler will have a maximum
setting of: ---------CORRECT ANSWER-----------------160 psig
, What causes scale? ---------CORRECT ANSWER-----------------calcium and
magnesium
Where should the registration number be located on each boiler in
New Jersey? ---------CORRECT ANSWER-----------------front
On a low pressure boiler, after start-up, when do you close the vent
valve? ---------CORRECT ANSWER-----------------when steam comes out
How are cast iron sectional boilers put together? ---------CORRECT
ANSWER-----------------with push nipples and bolts
What is the line voltage used in an ignition transformer? ---------
CORRECT ANSWER-----------------usually 120 VAC
When cleaning a new or re-tubed boiler, what should be used? ---------
CORRECT ANSWER-----------------an alkaline solution
2026) | Complete Questions and Correct
Answers | Updated Version
What is the main purpose of a check valve on the boiler feedwater line?
---------CORRECT ANSWER-----------------allow flow in one direction only
The main function of a water column on a steam pressure boiler is to: --
-------CORRECT ANSWER-----------------slow down movement o water to
get an accurate reading of water levels
A steam pressure gauge is designed to show steam calibrated in: ---------
CORRECT ANSWER-----------------pounds per square inch
The primary function of the MBCS (micro burner combustion system) is:
---------CORRECT ANSWER-----------------combustion safety
What is the purpose of an aquastat? ---------CORRECT ANSWER------------
-----controls water temperature
,What is the name of the device used to keep live steam from getting
into a pressure gauge? ---------CORRECT ANSWER-----------------siphon
loop
What is the minimum temperature at which a hot water heating boiler
should be operated at to prevent flue gas condensation? ---------
CORRECT ANSWER-----------------170 degrees
What is the name of the science that is used for heating while using
water as a conveying medium? ---------CORRECT ANSWER-----------------
hydronics
The high limit setting on a low pressure steam boiler must not exceed?
---------CORRECT ANSWER-----------------15 psig
A safety valve on a low pressure hot water boiler will have a maximum
setting of: ---------CORRECT ANSWER-----------------160 psig
, What causes scale? ---------CORRECT ANSWER-----------------calcium and
magnesium
Where should the registration number be located on each boiler in
New Jersey? ---------CORRECT ANSWER-----------------front
On a low pressure boiler, after start-up, when do you close the vent
valve? ---------CORRECT ANSWER-----------------when steam comes out
How are cast iron sectional boilers put together? ---------CORRECT
ANSWER-----------------with push nipples and bolts
What is the line voltage used in an ignition transformer? ---------
CORRECT ANSWER-----------------usually 120 VAC
When cleaning a new or re-tubed boiler, what should be used? ---------
CORRECT ANSWER-----------------an alkaline solution
