NJ HIGH PRESSURE BLACK SEAL EXAM QUESTIONS WITH CORRECT ANSWERS LATEST
UPDATE 2026/2027
What are the four main systems of a steam boiler? - Answers Fuel, Draft, Feedwater, and Steam
What is the first thing an operator should do when entering a steam boiler room? - Answers
Check the water level of the boiler(s)
Describe the design of a firetube boiler - Answers Fire inside the tubes, surrounded by water
What is the primary purpose of Low Water Fuel Cut-Off (LWCO)? - Answers Shut off the fuel
supply to the boiler in the event of low water
How often should the low water cut-off be tested? - Answers Once per day by law. Once per
shift is best practice.
What is an alternative way to verify water level without using the gauge glass? - Answers Using
the Try Cocks
What is sensible heat? - Answers A change in temperature without a change in matter
What unit is used in our industry to measure heat? - Answers BTU's
Describe thermal expansion - Answers The tendency of matter to change in volume in response
to a change in temperature
What is the most important rule of safe boiler operation? - Answers Maintain water level
What type of heat is a larger exchange of BTU's and results in a change in matter without
changing temperature? - Answers Latent Heat
Which temperature scale is used by the majority of the world? - Answers Celcius
How often, by law, must a boiler be inspected? - Answers Annually
A change in temperature is an example of: - Answers Sensible heat
How many BTU's does it take to change one pound of water into one pound of steam? -
Answers 970.3
What type of heat is a larger exchange of BTU's? - Answers Latent Heat
What is the most common fuel oil used in boilers? - Answers #2
What are the 4 fundamentals of combustion? - Answers Mixture, Atomization, Time,
Temperature
What PH level is ideal in boiler operation? - Answers 10-11.5
, Visible black smoke coming from the boiler stack would most likely be an indication of: -
Answers A lack of air in the combustion process
Which type of valve allows the flow of feedwater in one direction only? - Answers Check Valve
Which two minerals contribute to scale? - Answers Calcium and Magnesium
What device is used to measure draft? - Answers Manometer
What is the purpose of a safety valve? - Answers Prevent overpressure of the boiler
What type of draft fan would be located in between the chimney and the boiler furnace? -
Answers Induced Draft Fan
What valve is allowed between the safety valve and the boiler? - Answers No Valve Ever
How is a boiler's steam capacity measured? - Answers lbs/hr
Which type of valve would be used to modulate (or regulate) flow? - Answers Globe Valve
What are the four elements of process control? - Answers Process; Evaluation; Measurement;
Control
How much heat is required to change 2,500 lb of water to steam at 212 degrees? - Answers
2,425,750 Btu
In a fire-tube boiler, how are the tubes usually attached to the tube sheet? - Answers by rolling
the tubes and beading the ends
Air receivers must conform to what ASME Code - Answers Section VIII
What is the term that defines the ratio of the total heat supplied by the fuel to the total heat
absorbed by the boiler water? - Answers thermal efficiency
The maintenance of automatic direct fired boilers is covered under what document? - Answers
ASME CSD-1
Where would you find downcomer tubes? - Answers in water-tube boilers
The heat that is added to convert a liquid to a vapor at a constant temperature is called. -
Answers latent heat of evaporation
A three-element feedwater regulator is controlled by what means? - Answers steam flow,
feedwater flow, and drum level
What ASME code symbol is used to denote a high pressure power boiler? - Answers S
Pursuant to N.J.A.C. 12:90, what is the temperature and pressure that defines a high-
UPDATE 2026/2027
What are the four main systems of a steam boiler? - Answers Fuel, Draft, Feedwater, and Steam
What is the first thing an operator should do when entering a steam boiler room? - Answers
Check the water level of the boiler(s)
Describe the design of a firetube boiler - Answers Fire inside the tubes, surrounded by water
What is the primary purpose of Low Water Fuel Cut-Off (LWCO)? - Answers Shut off the fuel
supply to the boiler in the event of low water
How often should the low water cut-off be tested? - Answers Once per day by law. Once per
shift is best practice.
What is an alternative way to verify water level without using the gauge glass? - Answers Using
the Try Cocks
What is sensible heat? - Answers A change in temperature without a change in matter
What unit is used in our industry to measure heat? - Answers BTU's
Describe thermal expansion - Answers The tendency of matter to change in volume in response
to a change in temperature
What is the most important rule of safe boiler operation? - Answers Maintain water level
What type of heat is a larger exchange of BTU's and results in a change in matter without
changing temperature? - Answers Latent Heat
Which temperature scale is used by the majority of the world? - Answers Celcius
How often, by law, must a boiler be inspected? - Answers Annually
A change in temperature is an example of: - Answers Sensible heat
How many BTU's does it take to change one pound of water into one pound of steam? -
Answers 970.3
What type of heat is a larger exchange of BTU's? - Answers Latent Heat
What is the most common fuel oil used in boilers? - Answers #2
What are the 4 fundamentals of combustion? - Answers Mixture, Atomization, Time,
Temperature
What PH level is ideal in boiler operation? - Answers 10-11.5
, Visible black smoke coming from the boiler stack would most likely be an indication of: -
Answers A lack of air in the combustion process
Which type of valve allows the flow of feedwater in one direction only? - Answers Check Valve
Which two minerals contribute to scale? - Answers Calcium and Magnesium
What device is used to measure draft? - Answers Manometer
What is the purpose of a safety valve? - Answers Prevent overpressure of the boiler
What type of draft fan would be located in between the chimney and the boiler furnace? -
Answers Induced Draft Fan
What valve is allowed between the safety valve and the boiler? - Answers No Valve Ever
How is a boiler's steam capacity measured? - Answers lbs/hr
Which type of valve would be used to modulate (or regulate) flow? - Answers Globe Valve
What are the four elements of process control? - Answers Process; Evaluation; Measurement;
Control
How much heat is required to change 2,500 lb of water to steam at 212 degrees? - Answers
2,425,750 Btu
In a fire-tube boiler, how are the tubes usually attached to the tube sheet? - Answers by rolling
the tubes and beading the ends
Air receivers must conform to what ASME Code - Answers Section VIII
What is the term that defines the ratio of the total heat supplied by the fuel to the total heat
absorbed by the boiler water? - Answers thermal efficiency
The maintenance of automatic direct fired boilers is covered under what document? - Answers
ASME CSD-1
Where would you find downcomer tubes? - Answers in water-tube boilers
The heat that is added to convert a liquid to a vapor at a constant temperature is called. -
Answers latent heat of evaporation
A three-element feedwater regulator is controlled by what means? - Answers steam flow,
feedwater flow, and drum level
What ASME code symbol is used to denote a high pressure power boiler? - Answers S
Pursuant to N.J.A.C. 12:90, what is the temperature and pressure that defines a high-
