MASSACHUSETTS JOURNEYMAN PIPEFITTER EXAM
2025/2026 QUESTIONS WITH ANSWERS GRADED A+
✔✔2" - ✔✔When piping up a boiler gauge glass to a water tube boiler, the lowest visible
part of the water gauge glass shall be at least how many inches above the lowest
permissible water level (determined by the boiler manufacturer)?
✔✔250 degrees - ✔✔The ASME high pressure boiler code limits the use of non-ferrous
valves. What is the temperature limitation for 150 psi class bronze threaded gate valve?
✔✔406 Degrees - ✔✔The ASME high pressure boiler code says that non-ferrous pipe
or tubes shall not be used in the boiler proper for any service where the temperature
exceeds how many degrees F?
✔✔1/4" - ✔✔Gauge glass drains shall have an unrestricted drain opening of not less
than _______ inch.
✔✔OS&Y Valve or lever-fitting - ✔✔Shut-off valves shall not be used in the pipe
connections between a boiler and a water column unless they are what type of valves
(which must be locked and sealed open)?
✔✔2 1/2" - ✔✔The maximum size of a surface blow-off connection shall not exceed
____________ inches?
✔✔2 1/2" - ✔✔Hangers used for the support of piping, NPS _________ inches and
larger, shall be designed to permit adjustment after erection while supporting the load.
✔✔Protect the boiler from excess pressure - ✔✔The purpose of a safety valve is to
______________ ?
✔✔250 degrees - ✔✔The minimum temperature rating of all valves or cocks on a
heating boiler shall be at least equal to ___________ degrees F.
✔✔50% - ✔✔When more than 2 high pressure safety valves of different sizes are
mounted singly on a boiler, the relieving capacity of the smaller valve shall not be less
than __________ % of that of the larger valve.
✔✔level with a liquid - ✔✔What is a spirit level?
✔✔840 degrees - ✔✔When do brazing joints melt?
✔✔212 degrees - ✔✔At what temperature on Acetylene bottle do safety plugs melt?
✔✔Chop saw - ✔✔What is an abrasive saw?
, ✔✔air vents - ✔✔At all high points of a chilled water system, install ________.
✔✔ball valve - ✔✔Which valve is not appropriate as a boiler steam outlet valve on a
high pressure boiler?
✔✔never - ✔✔The size of bottom blow-down lines can be reduced under what
conditions?
✔✔3/4" - ✔✔For high pressure boilers having a water-heating surface of more than 100
square feet of heating surface the feed connection to the boiler shall not be smaller than
what pipe size?
✔✔5 - ✔✔A slow-opening valve requires how many complete turns to be fully opened or
closed?
✔✔500 - ✔✔According to the ASME high pressure boiler code, a boiler that has more
than how many square feet of heating surface must have 2 or more safety valves?
✔✔are readily accessible for internal inspection and cleaning - ✔✔The steam and water
connections to a water column or a water gauge glass on a high pressure boiler shall be
such that they ______________ ?
✔✔250 - ✔✔Cast iron pipe can be used to carry steam at pressures up to what
pressure (psig)?
✔✔as short and straight as possible - ✔✔The discharge pipe of a high pressure safety
valve shall be which of the following?
✔✔3" - ✔✔The largest safety valve that may be attached to a steam drum of a high
pressure boiler by threading is what pipe size?
✔✔carried clear from running boards or platforms - ✔✔All safety valve or safety relief
valve discharges shall be so located or piped as to be which of the following?
✔✔Thermometer - ✔✔What item is not common practice to use in piping up a reducing
station?
✔✔1/2" - ✔✔All gauge glass connections shall be not less than what pipe size?
✔✔4 1/2" - ✔✔Two or more safety valves must be used on a steam heating boiler when
the size of the boiler requires a safety or safety relief valve larger than how many inches
in diameter?
2025/2026 QUESTIONS WITH ANSWERS GRADED A+
✔✔2" - ✔✔When piping up a boiler gauge glass to a water tube boiler, the lowest visible
part of the water gauge glass shall be at least how many inches above the lowest
permissible water level (determined by the boiler manufacturer)?
✔✔250 degrees - ✔✔The ASME high pressure boiler code limits the use of non-ferrous
valves. What is the temperature limitation for 150 psi class bronze threaded gate valve?
✔✔406 Degrees - ✔✔The ASME high pressure boiler code says that non-ferrous pipe
or tubes shall not be used in the boiler proper for any service where the temperature
exceeds how many degrees F?
✔✔1/4" - ✔✔Gauge glass drains shall have an unrestricted drain opening of not less
than _______ inch.
✔✔OS&Y Valve or lever-fitting - ✔✔Shut-off valves shall not be used in the pipe
connections between a boiler and a water column unless they are what type of valves
(which must be locked and sealed open)?
✔✔2 1/2" - ✔✔The maximum size of a surface blow-off connection shall not exceed
____________ inches?
✔✔2 1/2" - ✔✔Hangers used for the support of piping, NPS _________ inches and
larger, shall be designed to permit adjustment after erection while supporting the load.
✔✔Protect the boiler from excess pressure - ✔✔The purpose of a safety valve is to
______________ ?
✔✔250 degrees - ✔✔The minimum temperature rating of all valves or cocks on a
heating boiler shall be at least equal to ___________ degrees F.
✔✔50% - ✔✔When more than 2 high pressure safety valves of different sizes are
mounted singly on a boiler, the relieving capacity of the smaller valve shall not be less
than __________ % of that of the larger valve.
✔✔level with a liquid - ✔✔What is a spirit level?
✔✔840 degrees - ✔✔When do brazing joints melt?
✔✔212 degrees - ✔✔At what temperature on Acetylene bottle do safety plugs melt?
✔✔Chop saw - ✔✔What is an abrasive saw?
, ✔✔air vents - ✔✔At all high points of a chilled water system, install ________.
✔✔ball valve - ✔✔Which valve is not appropriate as a boiler steam outlet valve on a
high pressure boiler?
✔✔never - ✔✔The size of bottom blow-down lines can be reduced under what
conditions?
✔✔3/4" - ✔✔For high pressure boilers having a water-heating surface of more than 100
square feet of heating surface the feed connection to the boiler shall not be smaller than
what pipe size?
✔✔5 - ✔✔A slow-opening valve requires how many complete turns to be fully opened or
closed?
✔✔500 - ✔✔According to the ASME high pressure boiler code, a boiler that has more
than how many square feet of heating surface must have 2 or more safety valves?
✔✔are readily accessible for internal inspection and cleaning - ✔✔The steam and water
connections to a water column or a water gauge glass on a high pressure boiler shall be
such that they ______________ ?
✔✔250 - ✔✔Cast iron pipe can be used to carry steam at pressures up to what
pressure (psig)?
✔✔as short and straight as possible - ✔✔The discharge pipe of a high pressure safety
valve shall be which of the following?
✔✔3" - ✔✔The largest safety valve that may be attached to a steam drum of a high
pressure boiler by threading is what pipe size?
✔✔carried clear from running boards or platforms - ✔✔All safety valve or safety relief
valve discharges shall be so located or piped as to be which of the following?
✔✔Thermometer - ✔✔What item is not common practice to use in piping up a reducing
station?
✔✔1/2" - ✔✔All gauge glass connections shall be not less than what pipe size?
✔✔4 1/2" - ✔✔Two or more safety valves must be used on a steam heating boiler when
the size of the boiler requires a safety or safety relief valve larger than how many inches
in diameter?
