NYC HIGH PRESSURE BOILER LICENSE 350
QUESTIONS & CORRECT ANSWERS LATEST 2025
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
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
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
QUESTIONS & CORRECT ANSWERS LATEST 2025
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
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
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
