BLACK SEAL LP NJ EXAM 80 QUESTIONS &
CORRECT ANSWERS LATEST 2025
Carryover can lead to: - ANSWER-Water Hammer
If water leaves the boiler at 170 degrees, what temperature does it return at? -
ANSWER-150 Degrees
The positioning control cannot function without: - ANSWER-Air
What fire tube boiler is most efficient? - ANSWER-4 Pass
What is the purpose of a check valve? - ANSWER-Allows flow in one direction
A solenoid valve is: - ANSWER-Is an automatic gas shutoff valve
What does PSIA stand for? - ANSWER-PSIG + Atmospheric Pressure
Water column & gauge glass should be blown down: - ANSWER-Daily
What is the most common cause of cast iron boiler failure? - ANSWER-Cracking
, What is the most common cause of problems in a hot water system? - ANSWER-
AIR
External feedwater treatment can be a ______ process - ANSWER-Cold lime soda,
hot lime soda, or ion exchange.
Natural water may contain: - ANSWER-Solids and other pollutants
Where are the combustion gases on a serpentine boiler? - ANSWER-Below the
tubes
A steam gauge is calibrated in: - ANSWER-Pounds per square inch
What code is a heating boiler built to? - ANSWER-ASME Section IV
What test is performed on re-tubed (repaired) boiler and what is the water temp?
- ANSWER-Hydrostatic Test at 70 F
Under what ASME section is the care and operation of heating boilers? - ANSWER-
Section VI
The expansion tank in a hot water system allows for the expansion of? - ANSWER-
WATER
As the water in a hot water system expands: - ANSWER-The pressure remains
constant
CORRECT ANSWERS LATEST 2025
Carryover can lead to: - ANSWER-Water Hammer
If water leaves the boiler at 170 degrees, what temperature does it return at? -
ANSWER-150 Degrees
The positioning control cannot function without: - ANSWER-Air
What fire tube boiler is most efficient? - ANSWER-4 Pass
What is the purpose of a check valve? - ANSWER-Allows flow in one direction
A solenoid valve is: - ANSWER-Is an automatic gas shutoff valve
What does PSIA stand for? - ANSWER-PSIG + Atmospheric Pressure
Water column & gauge glass should be blown down: - ANSWER-Daily
What is the most common cause of cast iron boiler failure? - ANSWER-Cracking
, What is the most common cause of problems in a hot water system? - ANSWER-
AIR
External feedwater treatment can be a ______ process - ANSWER-Cold lime soda,
hot lime soda, or ion exchange.
Natural water may contain: - ANSWER-Solids and other pollutants
Where are the combustion gases on a serpentine boiler? - ANSWER-Below the
tubes
A steam gauge is calibrated in: - ANSWER-Pounds per square inch
What code is a heating boiler built to? - ANSWER-ASME Section IV
What test is performed on re-tubed (repaired) boiler and what is the water temp?
- ANSWER-Hydrostatic Test at 70 F
Under what ASME section is the care and operation of heating boilers? - ANSWER-
Section VI
The expansion tank in a hot water system allows for the expansion of? - ANSWER-
WATER
As the water in a hot water system expands: - ANSWER-The pressure remains
constant
