NYC HIGH PRESSURE BOILER LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
The minimum blowdown for a spring loaded safety valve shall be of what percent of set pressure? -
(ANSWER)10%
How is the main steam pressure gages tested? - (ANSWER)With an inspectors gage
Who is in charge of the code for any plumbing installations? - (ANSWER)The nyc plumbing code
When will anchorage or guides be inspected? - (ANSWER)Annually
How many brass washout plugs does a miniature boiler have? - (ANSWER)3 brass washout plugs, 1" in
size
How often is HP piping expansion joints inspected? - (ANSWER)Weekly
How long should a hydronic system be pressure tested for? - (ANSWER)2 hours at no less than 100 psig
How is a gage protected from excessive pressure? - (ANSWER)Shut off cock
Who is authorized to witness a test on a gas piping system? - (ANSWER)Plumbing inspector, architect,
licensed PE, master plumber, agency by the DOB
How should a remote disconnect be labeled? - (ANSWER)Remote control for burner
When is a fusible plug not needed to be installed on a boiler? - (ANSWER)Over 200 psig
When shall a power boiler with a MAWP over 400 be tested? - (ANSWER)Pressure tested annually
,NYC HIGH PRESSURE BOILER LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
What shall a design plan of a boiler and application contain but not limited to? - (ANSWER)Size, location,
operating pressure + temperature of the pressure vessel and type + specs of PRV
Who is responsible for maintaining the copies of the certified welder qualifications report? -
(ANSWER)The welding agency and shall be available to the DOB
Who needs to furnish a control diagram and boiler operation instructions? - (ANSWER)The installer
Who will certify and calibrate all gages utilized for testing? - (ANSWER)A testing operator
What shall be placed in between different joints and piping material? - (ANSWER)An approved adapter
fitting
What items are exempt from the reporting requirements? - (ANSWER)The seal welds of the tubes and
the installation of back rings to man holes and hand holes to boilers
Who will be under control for any welding done to a high pressure tank? - (ANSWER)An engineer
supervising a welding inspection agency acceptable to the DOB
At what pressure is it requires to have extra heavy valves installed? - (ANSWER)100 psig
The ______ files an application for a boiler alteration? - (ANSWER)Inspector
How many safety valves does a boiler have with over 500 square feet of heating surface? - (ANSWER)2
Gas fired boilers not exceeding 100 square feet of heating surface shall be provided with a? -
(ANSWER)Single or double cone type of hood diverter in the stack
,NYC HIGH PRESSURE BOILER LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
A heater for either liquid fuels or other liquids harmful to the boiler shall not be installed? -
(ANSWER)Directly in the steam or water space within the boiler
Who is responsible for any spatial relationship between tanks and gas services? - (ANSWER)The installer
of the last installation to correct a violation
Who is responsible for the setting of operating and safety controls? - (ANSWER)The Installing Company
With what safety fitting shall you protect high pressure steam and water boilers with? - (ANSWER)Dual
low water cut outs
Spring loaded safety valves have a total combined relieve capacity of? - (ANSWER)100% of the max
designed capacity of the boiler
What is the total combined relieving capacity of power actuated relieving valves? - (ANSWER)No less the
10% of the MAWP or no higher then 20% above the MAWP
What is the minimum blowdown for a spring loaded safety valve? - (ANSWER)2%
When a boiler is derated what changes? - (ANSWER)The MAWP decreases and the BTU output
In hydronic piping systems where shall a shutoff valve be installed? - (ANSWER)Before and after the
Pressure Reducing Valve
Hydronic piping joints between steel tubing and fittings shall be? - (ANSWER)Mechanical or Welded
What appears on the plate of a boiler? - (ANSWER)Serial #, name of manufacturer, serial # of
manufacturer, MAWP, heating surface, year built and rated steam capacity
, NYC HIGH PRESSURE BOILER LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
Waste removal of a boiler shall conduct the products of combustion where? - (ANSWER)To the
atmosphere
When a quick closing valve creates water hammer what is installed on the line? - (ANSWER)A water
hammer adapter is installed
Safety valve capacity may be checked in what 3 ways? - (ANSWER)Accumulation test, evaporative
capacity of feed water and amount of fuel burned
Records of inspects are kept where? - (ANSWER)On the premises
No joint anchorages or guides shall be repaired, replaced or relocated without a work permit issued by
the department. This shall not apply to the repacking of a ___ or ___ joint. - (ANSWER)Ball or slip joint
Internal high pressure inspection requires the boiler to be ____, ___, ___, and ___. -
(ANSWER)Shutdown, drained, removal of hand and man holes
The outlet of the blowoff tank is what size? - (ANSWER)2 times the diameter of the blowdown piping, 6
inches internal entering the bottom of the blow off tank
What info is not necessary to send to DOB? - (ANSWER)Use, type, size, location, operating temp of
pressure tanks, and location, type, specs of Pressure Reducing Valve
Miniature boiler specs are ____ ID, ____ft gross volume, ____ft water heating surface, ____MAWP -
(ANSWER)16 ID, 5 ft gross volume, 20 ft heating surface and 100 mawp
Safety valve popping tolerance + capacity up to 70 psig? 71-300 psig, 301-1000 psig, >1000 -
(ANSWER)70 = 2 psig, 71-300 = 3%, 301-1000 = 10 psig, >1000 = 1%
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
The minimum blowdown for a spring loaded safety valve shall be of what percent of set pressure? -
(ANSWER)10%
How is the main steam pressure gages tested? - (ANSWER)With an inspectors gage
Who is in charge of the code for any plumbing installations? - (ANSWER)The nyc plumbing code
When will anchorage or guides be inspected? - (ANSWER)Annually
How many brass washout plugs does a miniature boiler have? - (ANSWER)3 brass washout plugs, 1" in
size
How often is HP piping expansion joints inspected? - (ANSWER)Weekly
How long should a hydronic system be pressure tested for? - (ANSWER)2 hours at no less than 100 psig
How is a gage protected from excessive pressure? - (ANSWER)Shut off cock
Who is authorized to witness a test on a gas piping system? - (ANSWER)Plumbing inspector, architect,
licensed PE, master plumber, agency by the DOB
How should a remote disconnect be labeled? - (ANSWER)Remote control for burner
When is a fusible plug not needed to be installed on a boiler? - (ANSWER)Over 200 psig
When shall a power boiler with a MAWP over 400 be tested? - (ANSWER)Pressure tested annually
,NYC HIGH PRESSURE BOILER LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
What shall a design plan of a boiler and application contain but not limited to? - (ANSWER)Size, location,
operating pressure + temperature of the pressure vessel and type + specs of PRV
Who is responsible for maintaining the copies of the certified welder qualifications report? -
(ANSWER)The welding agency and shall be available to the DOB
Who needs to furnish a control diagram and boiler operation instructions? - (ANSWER)The installer
Who will certify and calibrate all gages utilized for testing? - (ANSWER)A testing operator
What shall be placed in between different joints and piping material? - (ANSWER)An approved adapter
fitting
What items are exempt from the reporting requirements? - (ANSWER)The seal welds of the tubes and
the installation of back rings to man holes and hand holes to boilers
Who will be under control for any welding done to a high pressure tank? - (ANSWER)An engineer
supervising a welding inspection agency acceptable to the DOB
At what pressure is it requires to have extra heavy valves installed? - (ANSWER)100 psig
The ______ files an application for a boiler alteration? - (ANSWER)Inspector
How many safety valves does a boiler have with over 500 square feet of heating surface? - (ANSWER)2
Gas fired boilers not exceeding 100 square feet of heating surface shall be provided with a? -
(ANSWER)Single or double cone type of hood diverter in the stack
,NYC HIGH PRESSURE BOILER LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
A heater for either liquid fuels or other liquids harmful to the boiler shall not be installed? -
(ANSWER)Directly in the steam or water space within the boiler
Who is responsible for any spatial relationship between tanks and gas services? - (ANSWER)The installer
of the last installation to correct a violation
Who is responsible for the setting of operating and safety controls? - (ANSWER)The Installing Company
With what safety fitting shall you protect high pressure steam and water boilers with? - (ANSWER)Dual
low water cut outs
Spring loaded safety valves have a total combined relieve capacity of? - (ANSWER)100% of the max
designed capacity of the boiler
What is the total combined relieving capacity of power actuated relieving valves? - (ANSWER)No less the
10% of the MAWP or no higher then 20% above the MAWP
What is the minimum blowdown for a spring loaded safety valve? - (ANSWER)2%
When a boiler is derated what changes? - (ANSWER)The MAWP decreases and the BTU output
In hydronic piping systems where shall a shutoff valve be installed? - (ANSWER)Before and after the
Pressure Reducing Valve
Hydronic piping joints between steel tubing and fittings shall be? - (ANSWER)Mechanical or Welded
What appears on the plate of a boiler? - (ANSWER)Serial #, name of manufacturer, serial # of
manufacturer, MAWP, heating surface, year built and rated steam capacity
, NYC HIGH PRESSURE BOILER LICENSE EXAM QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED 2026 UPDATE!!! LATEST
UPDATE ALREADY GRADED A+
Waste removal of a boiler shall conduct the products of combustion where? - (ANSWER)To the
atmosphere
When a quick closing valve creates water hammer what is installed on the line? - (ANSWER)A water
hammer adapter is installed
Safety valve capacity may be checked in what 3 ways? - (ANSWER)Accumulation test, evaporative
capacity of feed water and amount of fuel burned
Records of inspects are kept where? - (ANSWER)On the premises
No joint anchorages or guides shall be repaired, replaced or relocated without a work permit issued by
the department. This shall not apply to the repacking of a ___ or ___ joint. - (ANSWER)Ball or slip joint
Internal high pressure inspection requires the boiler to be ____, ___, ___, and ___. -
(ANSWER)Shutdown, drained, removal of hand and man holes
The outlet of the blowoff tank is what size? - (ANSWER)2 times the diameter of the blowdown piping, 6
inches internal entering the bottom of the blow off tank
What info is not necessary to send to DOB? - (ANSWER)Use, type, size, location, operating temp of
pressure tanks, and location, type, specs of Pressure Reducing Valve
Miniature boiler specs are ____ ID, ____ft gross volume, ____ft water heating surface, ____MAWP -
(ANSWER)16 ID, 5 ft gross volume, 20 ft heating surface and 100 mawp
Safety valve popping tolerance + capacity up to 70 psig? 71-300 psig, 301-1000 psig, >1000 -
(ANSWER)70 = 2 psig, 71-300 = 3%, 301-1000 = 10 psig, >1000 = 1%
