NYC HIGH PRESSURE BOILER LICENSE
EXAM QUESTIONS AND ANSWERS 100%
PASS 2026 EDITION
The minimum blowdown for a spring loaded safety valve shall be of what percent of set
pressure? - ANS 10%
How is the main steam pressure gages tested? - ANS With an inspectors gage
Who is in charge of the code for any plumbing installations? - ANS The nyc plumbing code
When will anchorage or guides be inspected? - ANS Annually
How many brass washout plugs does a miniature boiler have? - ANS 3 brass washout plugs,
1" in size
How often is HP piping expansion joints inspected? - ANS Weekly
How long should a hydronic system be pressure tested for? - ANS 2 hours at no less than 100
psig
How is a gage protected from excessive pressure? - ANS Shut off cock
@COPYRIGHT 2026 ALLRIGHTS RESERVED 1
,Who is authorized to witness a test on a gas piping system? - ANS Plumbing inspector,
architect, licensed PE, master plumber, agency by the DOB
How should a remote disconnect be labeled? - ANS Remote control for burner
When is a fusible plug not needed to be installed on a boiler? - ANS Over 200 psig
When shall a power boiler with a MAWP over 400 be tested? - ANS Pressure tested annually
What shall a design plan of a boiler and application contain but not limited to? - ANS 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? -
ANS The welding agency and shall be available to the DOB
Who needs to furnish a control diagram and boiler operation instructions? - ANS The installer
Who will certify and calibrate all gages utilized for testing? - ANS A testing operator
What shall be placed in between different joints and piping material? - ANS An approved
adapter fitting
What items are exempt from the reporting requirements? - ANS 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? - ANS An engineer
supervising a welding inspection agency acceptable to the DOB
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
,At what pressure is it requires to have extra heavy valves installed? - ANS 100 psig
The ______ files an application for a boiler alteration? - ANS Inspector
How many safety valves does a boiler have with over 500 square feet of heating surface? -
ANS 2
Gas fired boilers not exceeding 100 square feet of heating surface shall be provided with a? -
ANS Single or double cone type of hood diverter in the stack
A heater for either liquid fuels or other liquids harmful to the boiler shall not be installed? -
ANS Directly in the steam or water space within the boiler
Who is responsible for any spatial relationship between tanks and gas services? - ANS The
installer of the last installation to correct a violation
Who is responsible for the setting of operating and safety controls? - ANS The Installing
Company
With what safety fitting shall you protect high pressure steam and water boilers with? -
ANS Dual low water cut outs
Spring loaded safety valves have a total combined relieve capacity of? - ANS 100% of the max
designed capacity of the boiler
What is the total combined relieving capacity of power actuated relieving valves? - ANS 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? - ANS 2%
@COPYRIGHT 2026 ALLRIGHTS RESERVED 3
, When a boiler is derated what changes? - ANS The MAWP decreases and the BTU output
In hydronic piping systems where shall a shutoff valve be installed? - ANS Before and after
the Pressure Reducing Valve
Hydronic piping joints between steel tubing and fittings shall be? - ANS Mechanical or
Welded
What appears on the plate of a boiler? - ANS Serial #, name of manufacturer, serial # of
manufacturer, MAWP, heating surface, year built and rated steam capacity
Waste removal of a boiler shall conduct the products of combustion where? - ANS To the
atmosphere
When a quick closing valve creates water hammer what is installed on the line? - ANS A
water hammer adapter is installed
Safety valve capacity may be checked in what 3 ways? - ANS Accumulation test, evaporative
capacity of feed water and amount of fuel burned
Records of inspects are kept where? - ANS 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. -
ANS Ball or slip joint
Internal high pressure inspection requires the boiler to be ____, ___, ___, and ___. -
ANS Shutdown, drained, removal of hand and man holes
@COPYRIGHT 2026 ALLRIGHTS RESERVED 4
EXAM QUESTIONS AND ANSWERS 100%
PASS 2026 EDITION
The minimum blowdown for a spring loaded safety valve shall be of what percent of set
pressure? - ANS 10%
How is the main steam pressure gages tested? - ANS With an inspectors gage
Who is in charge of the code for any plumbing installations? - ANS The nyc plumbing code
When will anchorage or guides be inspected? - ANS Annually
How many brass washout plugs does a miniature boiler have? - ANS 3 brass washout plugs,
1" in size
How often is HP piping expansion joints inspected? - ANS Weekly
How long should a hydronic system be pressure tested for? - ANS 2 hours at no less than 100
psig
How is a gage protected from excessive pressure? - ANS Shut off cock
@COPYRIGHT 2026 ALLRIGHTS RESERVED 1
,Who is authorized to witness a test on a gas piping system? - ANS Plumbing inspector,
architect, licensed PE, master plumber, agency by the DOB
How should a remote disconnect be labeled? - ANS Remote control for burner
When is a fusible plug not needed to be installed on a boiler? - ANS Over 200 psig
When shall a power boiler with a MAWP over 400 be tested? - ANS Pressure tested annually
What shall a design plan of a boiler and application contain but not limited to? - ANS 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? -
ANS The welding agency and shall be available to the DOB
Who needs to furnish a control diagram and boiler operation instructions? - ANS The installer
Who will certify and calibrate all gages utilized for testing? - ANS A testing operator
What shall be placed in between different joints and piping material? - ANS An approved
adapter fitting
What items are exempt from the reporting requirements? - ANS 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? - ANS An engineer
supervising a welding inspection agency acceptable to the DOB
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
,At what pressure is it requires to have extra heavy valves installed? - ANS 100 psig
The ______ files an application for a boiler alteration? - ANS Inspector
How many safety valves does a boiler have with over 500 square feet of heating surface? -
ANS 2
Gas fired boilers not exceeding 100 square feet of heating surface shall be provided with a? -
ANS Single or double cone type of hood diverter in the stack
A heater for either liquid fuels or other liquids harmful to the boiler shall not be installed? -
ANS Directly in the steam or water space within the boiler
Who is responsible for any spatial relationship between tanks and gas services? - ANS The
installer of the last installation to correct a violation
Who is responsible for the setting of operating and safety controls? - ANS The Installing
Company
With what safety fitting shall you protect high pressure steam and water boilers with? -
ANS Dual low water cut outs
Spring loaded safety valves have a total combined relieve capacity of? - ANS 100% of the max
designed capacity of the boiler
What is the total combined relieving capacity of power actuated relieving valves? - ANS 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? - ANS 2%
@COPYRIGHT 2026 ALLRIGHTS RESERVED 3
, When a boiler is derated what changes? - ANS The MAWP decreases and the BTU output
In hydronic piping systems where shall a shutoff valve be installed? - ANS Before and after
the Pressure Reducing Valve
Hydronic piping joints between steel tubing and fittings shall be? - ANS Mechanical or
Welded
What appears on the plate of a boiler? - ANS Serial #, name of manufacturer, serial # of
manufacturer, MAWP, heating surface, year built and rated steam capacity
Waste removal of a boiler shall conduct the products of combustion where? - ANS To the
atmosphere
When a quick closing valve creates water hammer what is installed on the line? - ANS A
water hammer adapter is installed
Safety valve capacity may be checked in what 3 ways? - ANS Accumulation test, evaporative
capacity of feed water and amount of fuel burned
Records of inspects are kept where? - ANS 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. -
ANS Ball or slip joint
Internal high pressure inspection requires the boiler to be ____, ___, ___, and ___. -
ANS Shutdown, drained, removal of hand and man holes
@COPYRIGHT 2026 ALLRIGHTS RESERVED 4
