NJ BLACK SEAL EXAM PREP VERSION 2
2026/2027 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |CURRENTLY TESTING
QUESTIONS AND SOLUTIONS|ALREADY
GRADED A+|NEWEST |JUST
RELEASED!!|GUARANTEED PASS
The purge cycle on a boiler is designed to perform what function?
To remove combustible gases
The type of valve located between the boiler and safety valve must be a:
No Valve
A common type of feedwater regulator is a:
pressure sensitive device
When open, an OS&Y valve offers ___ to the flow of steam.
No resistence
What section of the ASME code do hot water heating boilers fall under?
Section IV
Where is the combustion chamber located on a serpentine heating boiler?
Located below the tubes
What should you do if you walked into a boiler room and the safety valves were popped and the
boiler pressure is above its MAWP (Maximum allowable working pressure)?
Secure the fire at the burner
1|Page
,What letter stamp do hot water heating boilers fall under?
H
In NJ, how often should boilers over 100 horsepower be inspected internally and externally?
Annually
A manometer is calibrated in what units of measurement?
Inches of Water
Bottom blowdown is best performed when the boiler is___.
Under light load
What is the main purpose of a check valve on the boiler feedwater line?
To allow flow in one direction only
The main function of a water column on a steam pressure boiler is to:
Slow down movement of water to get accurate reading of water levels
A steam pressure gauge is designed to show steam calibrated in:
Lbs. / Sq. Inch
The primary function of the MBCS ( Micro burner combustion system) is:
Combustion Safety
What is the purpose of the aquastat?
Control Water Temperature
What is the name of the device used to keep live steam from getting into a pressure gauge?
Siphon loop
What is the minimum temperature at which a hot water heating boiler should be operates at to
prevent flue gas condensation?
2|Page
, 170 F
The vaporstat should be electrically interlocked with the:
Fuel solenoid valve
What is the name of the science that is used for heating while using water as a conveying
medium?
Hydronics
Automatic feedwater regulators are blown down how often?
Daily
A safety valve on a low pressure hot water boiler will have a maximum setting of:
160 psig
Hard water contains____.
Scale-forming salts
According to NJ Mechanical Inspection Bureau rules, the boiler jurisdiction (regulation) number
must be placed on the ___ of each boiler
Front
On a low pressure boiler, after start-up, when do you close the vent valve?
When the steam comes out
How are cast iron sectional boilers put together?
With push nipples and bolts
What is the maximum horsepower a NJ low pressure licenced operator can operate up to?
No limit
New or retubed boilers should be cleaned with:
3|Page
2026/2027 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |CURRENTLY TESTING
QUESTIONS AND SOLUTIONS|ALREADY
GRADED A+|NEWEST |JUST
RELEASED!!|GUARANTEED PASS
The purge cycle on a boiler is designed to perform what function?
To remove combustible gases
The type of valve located between the boiler and safety valve must be a:
No Valve
A common type of feedwater regulator is a:
pressure sensitive device
When open, an OS&Y valve offers ___ to the flow of steam.
No resistence
What section of the ASME code do hot water heating boilers fall under?
Section IV
Where is the combustion chamber located on a serpentine heating boiler?
Located below the tubes
What should you do if you walked into a boiler room and the safety valves were popped and the
boiler pressure is above its MAWP (Maximum allowable working pressure)?
Secure the fire at the burner
1|Page
,What letter stamp do hot water heating boilers fall under?
H
In NJ, how often should boilers over 100 horsepower be inspected internally and externally?
Annually
A manometer is calibrated in what units of measurement?
Inches of Water
Bottom blowdown is best performed when the boiler is___.
Under light load
What is the main purpose of a check valve on the boiler feedwater line?
To allow flow in one direction only
The main function of a water column on a steam pressure boiler is to:
Slow down movement of water to get accurate reading of water levels
A steam pressure gauge is designed to show steam calibrated in:
Lbs. / Sq. Inch
The primary function of the MBCS ( Micro burner combustion system) is:
Combustion Safety
What is the purpose of the aquastat?
Control Water Temperature
What is the name of the device used to keep live steam from getting into a pressure gauge?
Siphon loop
What is the minimum temperature at which a hot water heating boiler should be operates at to
prevent flue gas condensation?
2|Page
, 170 F
The vaporstat should be electrically interlocked with the:
Fuel solenoid valve
What is the name of the science that is used for heating while using water as a conveying
medium?
Hydronics
Automatic feedwater regulators are blown down how often?
Daily
A safety valve on a low pressure hot water boiler will have a maximum setting of:
160 psig
Hard water contains____.
Scale-forming salts
According to NJ Mechanical Inspection Bureau rules, the boiler jurisdiction (regulation) number
must be placed on the ___ of each boiler
Front
On a low pressure boiler, after start-up, when do you close the vent valve?
When the steam comes out
How are cast iron sectional boilers put together?
With push nipples and bolts
What is the maximum horsepower a NJ low pressure licenced operator can operate up to?
No limit
New or retubed boilers should be cleaned with:
3|Page
