NYC HIGH PRESSURE BOILER EXAMS SCRIPT QUESTIONS
AND SOLUTIONS 2025/2026 GRADED A+
✔✔Gage to be measured in the magnitude of 5 psig shall not be calibrated in no less
than? - ✔✔1/5" increments
✔✔At what percent do you hydrostatically test a boiler? - ✔✔150%
✔✔Beside a log book being inspected by a state boiler inspector who else can look at
the book? - ✔✔the insurance company
✔✔What is the difference between low pressure and high pressure safety relief valves?
- ✔✔Low pressure relieves to drain, high pressure to vent
✔✔What is the minimum dial arc on a 2-1/4" gage - ✔✔270*
✔✔Where is the steam gage installed on a mini boiler? - ✔✔On the steam space side
✔✔What is an effective stop for a gauge? - ✔✔The indicating point at zero
✔✔How long is the pre-purge on a low pressure boiler? - ✔✔90 seconds
✔✔What does the Stamp (S) mean and the stamp (h) mean? - ✔✔S means power
boiler, h means low pressure boiler
✔✔Each superheater shall be equipped with how many drains? - ✔✔At least 1
✔✔How often does an insurance inspector inspect the boilers? - ✔✔Annually
✔✔What is the work that is done to a boiler that doesnt have to be reported and is
exempt? - ✔✔Replacement of the backings to the man holes and hand holes and seals
welds to tubes
✔✔How do you prepare a brazed joint - ✔✔Clean, flux, heat, filler metal
✔✔How do you prepare a weld? - ✔✔Clean, convex, weld a filler metal, wire wheel
✔✔Mufflers are not to be installed on? - ✔✔High pressure boilers
✔✔What would happen if your strainers from your discharge and supply lines are
clogged? - ✔✔Deep vacuum
✔✔How many safety valves are on a miniature boiler? - ✔✔1 since only 20 sq ft
,✔✔When connecting two different types of metallic pipe what is used in between? -
✔✔A dielectric kit or fitting
✔✔Where do you install gas service or distribution line from a new high pressure tank?
- ✔✔In a separate room
✔✔How many square feet of heating surface does a fusible plug require? - ✔✔50 sq ft
✔✔Where does a low pressure safety and relief valve discharge to? - ✔✔The drain
✔✔Electric boilers have two or more safety valves at a power output of _____ kW? -
✔✔1100 kW
✔✔If an electric boiler is operating at a max of 1100 kW how many safety valves are
required? - ✔✔2
✔✔When is a bullseye water sight glass acceptable on a miniature boiler? - ✔✔When
there is insufficient space for a gage glass
✔✔After an inspectors notice is given to the owner where is it posted? - ✔✔On or close
to the boiler
✔✔What type of welding shall the pipes of 2" or more have? - ✔✔Butt weld
✔✔Gage measured in the magnitude of 3 psig calibrated in increments of? - ✔✔1/10"
✔✔What are the minimum and the maximum temp when performing a hydrostatic test?
- ✔✔Above ambient temp CODE: 70-120*F
✔✔Where does a low pressure safety and relief valve discharge to? - ✔✔A drain
✔✔How do you prepare a soldered joint? - ✔✔Clean, flux, heat, solder
✔✔How often do you bottom blow off? - ✔✔Daily
✔✔Who authorizes changes to high pressure piping anchors, guides and expansion
joints without effect to health and safety? - ✔✔The professional engineer
✔✔What installing an expansion tank what factor is taken in to consideration? - ✔✔The
MAWP of the boiler system
✔✔If you are reading 12% Co2 what does it pertain to? - ✔✔Incomplete combustion
, ✔✔When should you inspect expansion joints? - ✔✔Weekly
✔✔How far does a pressure tank need to be away from any gas services? - ✔✔5 feet
horizontal
✔✔Where is the remote disconnect located? What is it labeled? - ✔✔At the egress,
remote control for burner
✔✔What range of gage magnitude of 3 psig shall not exceed? - ✔✔1/10" increments @
4.5 psig to 6 psig
✔✔What is the minimum face size of a non mercury gage? - ✔✔2-1/4"
✔✔How many complete turns for a slow opening valve to go from full close to full open?
- ✔✔5 360* turns
✔✔What is the size pipe of the surface blow off? - ✔✔2-1/2" max
✔✔What is the pipe size of a gage cock connection? - ✔✔1/2"
✔✔How many gage cocks are needed if a boiler is not over 36" in diameter and does
not exceed 100 sq ft of heating surface? - ✔✔2
✔✔How do you protect a bottom blow off pipe when exposed to direct furnace heat? -
✔✔Fire brick
✔✔Who has prior approval by the D.O.B when an eminent health or safety hazard
happens? - ✔✔Professional Engineer
✔✔If a muffler is installed on a safety or relief valve the function is to? - ✔✔Prevent
back pressure on a boiler
✔✔What do you do when adding a new tube to a boiler? Water tube boiler? Fire tube
boiler? - ✔✔Roll and expand, water = roll and flare, fire = roll and bead
✔✔Prior to the clean air act what were boiler operations concerned with? - ✔✔Sulfur
dioxide
✔✔What standard is plastic - ✔✔Astm
✔✔What pressure shall a system using utility street steam have? - ✔✔200 psig at
413*F which is than reduced by a PRV
AND SOLUTIONS 2025/2026 GRADED A+
✔✔Gage to be measured in the magnitude of 5 psig shall not be calibrated in no less
than? - ✔✔1/5" increments
✔✔At what percent do you hydrostatically test a boiler? - ✔✔150%
✔✔Beside a log book being inspected by a state boiler inspector who else can look at
the book? - ✔✔the insurance company
✔✔What is the difference between low pressure and high pressure safety relief valves?
- ✔✔Low pressure relieves to drain, high pressure to vent
✔✔What is the minimum dial arc on a 2-1/4" gage - ✔✔270*
✔✔Where is the steam gage installed on a mini boiler? - ✔✔On the steam space side
✔✔What is an effective stop for a gauge? - ✔✔The indicating point at zero
✔✔How long is the pre-purge on a low pressure boiler? - ✔✔90 seconds
✔✔What does the Stamp (S) mean and the stamp (h) mean? - ✔✔S means power
boiler, h means low pressure boiler
✔✔Each superheater shall be equipped with how many drains? - ✔✔At least 1
✔✔How often does an insurance inspector inspect the boilers? - ✔✔Annually
✔✔What is the work that is done to a boiler that doesnt have to be reported and is
exempt? - ✔✔Replacement of the backings to the man holes and hand holes and seals
welds to tubes
✔✔How do you prepare a brazed joint - ✔✔Clean, flux, heat, filler metal
✔✔How do you prepare a weld? - ✔✔Clean, convex, weld a filler metal, wire wheel
✔✔Mufflers are not to be installed on? - ✔✔High pressure boilers
✔✔What would happen if your strainers from your discharge and supply lines are
clogged? - ✔✔Deep vacuum
✔✔How many safety valves are on a miniature boiler? - ✔✔1 since only 20 sq ft
,✔✔When connecting two different types of metallic pipe what is used in between? -
✔✔A dielectric kit or fitting
✔✔Where do you install gas service or distribution line from a new high pressure tank?
- ✔✔In a separate room
✔✔How many square feet of heating surface does a fusible plug require? - ✔✔50 sq ft
✔✔Where does a low pressure safety and relief valve discharge to? - ✔✔The drain
✔✔Electric boilers have two or more safety valves at a power output of _____ kW? -
✔✔1100 kW
✔✔If an electric boiler is operating at a max of 1100 kW how many safety valves are
required? - ✔✔2
✔✔When is a bullseye water sight glass acceptable on a miniature boiler? - ✔✔When
there is insufficient space for a gage glass
✔✔After an inspectors notice is given to the owner where is it posted? - ✔✔On or close
to the boiler
✔✔What type of welding shall the pipes of 2" or more have? - ✔✔Butt weld
✔✔Gage measured in the magnitude of 3 psig calibrated in increments of? - ✔✔1/10"
✔✔What are the minimum and the maximum temp when performing a hydrostatic test?
- ✔✔Above ambient temp CODE: 70-120*F
✔✔Where does a low pressure safety and relief valve discharge to? - ✔✔A drain
✔✔How do you prepare a soldered joint? - ✔✔Clean, flux, heat, solder
✔✔How often do you bottom blow off? - ✔✔Daily
✔✔Who authorizes changes to high pressure piping anchors, guides and expansion
joints without effect to health and safety? - ✔✔The professional engineer
✔✔What installing an expansion tank what factor is taken in to consideration? - ✔✔The
MAWP of the boiler system
✔✔If you are reading 12% Co2 what does it pertain to? - ✔✔Incomplete combustion
, ✔✔When should you inspect expansion joints? - ✔✔Weekly
✔✔How far does a pressure tank need to be away from any gas services? - ✔✔5 feet
horizontal
✔✔Where is the remote disconnect located? What is it labeled? - ✔✔At the egress,
remote control for burner
✔✔What range of gage magnitude of 3 psig shall not exceed? - ✔✔1/10" increments @
4.5 psig to 6 psig
✔✔What is the minimum face size of a non mercury gage? - ✔✔2-1/4"
✔✔How many complete turns for a slow opening valve to go from full close to full open?
- ✔✔5 360* turns
✔✔What is the size pipe of the surface blow off? - ✔✔2-1/2" max
✔✔What is the pipe size of a gage cock connection? - ✔✔1/2"
✔✔How many gage cocks are needed if a boiler is not over 36" in diameter and does
not exceed 100 sq ft of heating surface? - ✔✔2
✔✔How do you protect a bottom blow off pipe when exposed to direct furnace heat? -
✔✔Fire brick
✔✔Who has prior approval by the D.O.B when an eminent health or safety hazard
happens? - ✔✔Professional Engineer
✔✔If a muffler is installed on a safety or relief valve the function is to? - ✔✔Prevent
back pressure on a boiler
✔✔What do you do when adding a new tube to a boiler? Water tube boiler? Fire tube
boiler? - ✔✔Roll and expand, water = roll and flare, fire = roll and bead
✔✔Prior to the clean air act what were boiler operations concerned with? - ✔✔Sulfur
dioxide
✔✔What standard is plastic - ✔✔Astm
✔✔What pressure shall a system using utility street steam have? - ✔✔200 psig at
413*F which is than reduced by a PRV
