NJ Black Seal Low Pressure EXAM STUDY
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. The basic function of an automatic feedwater regulator on a boiler is to: -
ANSWER ✔ maintain proper water level
2. If a one square inch column of water is one foot tall, how much does it
weigh? - ANSWER ✔ .433 lbs
3. Where is the flame sensing device located on a boiler? - ANSWER ✔ front
4. Cracking of the boiler metal can be caused by: - ANSWER ✔ caustic
embrittlement
5. How would you test the operation of the flame failure device? - ANSWER
✔ by shutting off the fuel supply valve
6. Where are the combustible gases located in a water tube boiler? - ANSWER
✔ flowing around the tubes
,7. The maximum temperature and pressure allowed on low pressure heating
boilers is: - ANSWER ✔ 250 degrees at 160 psi
8. What is the applied science for hot water boiler systems? - ANSWER ✔
hydronics
9. What is the main purpose of establishing plant safety rules? - ANSWER ✔
to protect employees and equipment
10.The water temperature setting on a hot water boiler should be no less than
_____ to prevent flue gas condensation. - ANSWER ✔ 170 degrees
11.On a valve that had a minor packing leak, an adjustment was made to the
packing gland, but the operator finds the valve stuck. What may have caused
this? - ANSWER ✔
12.The amount of natural draft is not affected by the height of the stack. True or
False? - ANSWER ✔ False
13.Why are some steam heating boiler systems designed to operate under a
vacuum? - ANSWER ✔ to utilize steam with a temperature below 212
degrees
14.A thermostatic steam trap is a steam trap that has bellows filled with a fluid
that boils at steam temperature. True or False? - ANSWER ✔ True
,15.What is the name of the control device that low pressure boilers are
equipped with that allows for the proper burner sequence of operation? -
ANSWER ✔ programming control
16.How should an operator operate the handwheel to verify the position o a
fully open manual valve? - ANSWER ✔ move it in the closed direction
initially and then open the valve back to the original position
17.Name the 4 systems needed to operate a steam boiler. - ANSWER ✔ steam,
feedwater, fuel, draft
18.What is the best way to determine the frequency an operator should blow
down a boiler? - ANSWER ✔ boiler water analysis
19.What protects the sewer line from high temperatures coming from the boiler
blowdown lines? - ANSWER ✔ a blowdown tank
20.What is required for complete combustion? - ANSWER ✔ mixture,
atomization, time, temperature
21.What is the maximum penalty for operating with an expired license? -
ANSWER ✔ $5000.00
22.The ASME code section for care and operation of a hot water heating boiler
falls under: - ANSWER ✔ Section VI
23.Which valve offers the least resistance to flow when fully opened? -
ANSWER ✔ OS&Y or gate valve
, 24.Carryover can lead to: - ANSWER ✔ Water Hammer
25.If water leaves the boiler at 170 degrees, what temperature does it return at?
- ANSWER ✔ 150 Degrees
26.The positioning control cannot function without: - ANSWER ✔ Air
27.What fire tube boiler is most efficient? - ANSWER ✔ 4 Pass
28.What is the purpose of a check valve? - ANSWER ✔ Allows flow in one
direction
29.A solenoid valve is: - ANSWER ✔ Is an automatic gas shutoff valve
30.What does PSIA stand for? - ANSWER ✔ PSIG + Atmospheric Pressure
31.Water column & gauge glass should be blown down: - ANSWER ✔ Daily
32.What is the most common cause of cast iron boiler failure? - ANSWER ✔
Cracking
33.What is the most common cause of problems in a hot water system? -
ANSWER ✔ AIR
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. The basic function of an automatic feedwater regulator on a boiler is to: -
ANSWER ✔ maintain proper water level
2. If a one square inch column of water is one foot tall, how much does it
weigh? - ANSWER ✔ .433 lbs
3. Where is the flame sensing device located on a boiler? - ANSWER ✔ front
4. Cracking of the boiler metal can be caused by: - ANSWER ✔ caustic
embrittlement
5. How would you test the operation of the flame failure device? - ANSWER
✔ by shutting off the fuel supply valve
6. Where are the combustible gases located in a water tube boiler? - ANSWER
✔ flowing around the tubes
,7. The maximum temperature and pressure allowed on low pressure heating
boilers is: - ANSWER ✔ 250 degrees at 160 psi
8. What is the applied science for hot water boiler systems? - ANSWER ✔
hydronics
9. What is the main purpose of establishing plant safety rules? - ANSWER ✔
to protect employees and equipment
10.The water temperature setting on a hot water boiler should be no less than
_____ to prevent flue gas condensation. - ANSWER ✔ 170 degrees
11.On a valve that had a minor packing leak, an adjustment was made to the
packing gland, but the operator finds the valve stuck. What may have caused
this? - ANSWER ✔
12.The amount of natural draft is not affected by the height of the stack. True or
False? - ANSWER ✔ False
13.Why are some steam heating boiler systems designed to operate under a
vacuum? - ANSWER ✔ to utilize steam with a temperature below 212
degrees
14.A thermostatic steam trap is a steam trap that has bellows filled with a fluid
that boils at steam temperature. True or False? - ANSWER ✔ True
,15.What is the name of the control device that low pressure boilers are
equipped with that allows for the proper burner sequence of operation? -
ANSWER ✔ programming control
16.How should an operator operate the handwheel to verify the position o a
fully open manual valve? - ANSWER ✔ move it in the closed direction
initially and then open the valve back to the original position
17.Name the 4 systems needed to operate a steam boiler. - ANSWER ✔ steam,
feedwater, fuel, draft
18.What is the best way to determine the frequency an operator should blow
down a boiler? - ANSWER ✔ boiler water analysis
19.What protects the sewer line from high temperatures coming from the boiler
blowdown lines? - ANSWER ✔ a blowdown tank
20.What is required for complete combustion? - ANSWER ✔ mixture,
atomization, time, temperature
21.What is the maximum penalty for operating with an expired license? -
ANSWER ✔ $5000.00
22.The ASME code section for care and operation of a hot water heating boiler
falls under: - ANSWER ✔ Section VI
23.Which valve offers the least resistance to flow when fully opened? -
ANSWER ✔ OS&Y or gate valve
, 24.Carryover can lead to: - ANSWER ✔ Water Hammer
25.If water leaves the boiler at 170 degrees, what temperature does it return at?
- ANSWER ✔ 150 Degrees
26.The positioning control cannot function without: - ANSWER ✔ Air
27.What fire tube boiler is most efficient? - ANSWER ✔ 4 Pass
28.What is the purpose of a check valve? - ANSWER ✔ Allows flow in one
direction
29.A solenoid valve is: - ANSWER ✔ Is an automatic gas shutoff valve
30.What does PSIA stand for? - ANSWER ✔ PSIG + Atmospheric Pressure
31.Water column & gauge glass should be blown down: - ANSWER ✔ Daily
32.What is the most common cause of cast iron boiler failure? - ANSWER ✔
Cracking
33.What is the most common cause of problems in a hot water system? -
ANSWER ✔ AIR
