Massachusetts Journeyman Pipefitter License Exam
NEWEST 2026-2027 ACTUAL EXAM WITH
COMPLETE 160 QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED
ANSWERS) ALREADY GRADED A+ PROFESSOR
VERIFIED
A standard oxygen cylinder contains _____ - CORRECT ANSWER: 2200 psil
After field assembly of a cast iron steam heating boiler, you are required to hydrostatically test it.
the assembled boiler shall be subjected to a hydrostatic test of not less than what pressure (psig)?
- CORRECT ANSWER: 45 psi
ASME B31.1 power piping code requires that boiler blow off fittings shall be steel & the
thickness of pipe & fittings shall not be less than that of schedule 80 pipe when the boiler
pressure exceeds what pressure (psig)? - CORRECT ANSWER: 100 psi
ASME power piping code requires that when the boiler steam outlet is over what size NPS an
OS &Y valve shall be used? - CORRECT ANSWER: 2 in. NPS
Category___________is the less
hazardous service. It includes fluids that are nontoxic, nonflammable and not dangerous to
human tissue and are at a pressuer less than 150psi and temperature from -20 degrees F through
186 degrees F. - CORRECT ANSWER: D (Fluid Service)
How can the fuel cutoff be connected to the boiler? - CORRECT ANSWER: Through tapped
openings if nonferrous Y's and tees are used
How many pressure gages must a power boiler have and where? - CORRECT ANSWER: At
least one located where easily readable
,How many safety valves or safety relief valves are required on a power boiler? - CORRECT
ANSWER: At least one and two for boilers with greater than 500 sq ft water heating surface
How many sources of feedwater are required on power boilers? - CORRECT ANSWER: 2
sources for all boilers greater than
500 square ft water heating surface area
How must the pressure gage be graduated on a power boiler? - CORRECT ANSWER: To
approx. double the pressure of the safety valve but no less than 1 ½ times that pressure
Safety valves/reliefs are not generated to not let the boiler to rise above what percent? -
CORRECT ANSWER: 6%
The ASME high pressure boiler code limits the use of non ferrous valves.
What is the temperature limitation for a 150 psi class bronze threaded gate valve? - CORRECT
ANSWER: 250° F
The lower edge of the steam connection to a water column shall be? - CORRECT ANSWER:
Not below highest visible water level in gage glass
The upper edge of the water connection to a water column shall be? - CORRECT ANSWER: Not
be above the lowest visible water level in the gage glass
What acceptable method of meeting the requirements for internal inspection and cleaning shall
be made for steam and water connections to a water column? - CORRECT ANSWER: Fitting
with a back outlet at each right
angle turn
What are the approximate hanger rod sizes? - CORRECT ANSWER: 2 in NPS and less: 3/8"
, 2 1/2 in NPS and greater: 1/2"
What are the limits of nonmetallic pipe? - CORRECT ANSWER: 150 psi AND 140° F
What are the minimum connections for feedwater piping in power boilers? - CORRECT
ANSWER: Less than or equal to 100 sq. ft water heating surface ½ "NPS
Greater than 100 sq. ft water heating surface ¾" NPS
What does the feedwater piping for all boilers except high temp water include? - CORRECT
ANSWER: It extends through the required stop valve and check valve
What is boiler external piping? - CORRECT ANSWER: Piping that begins at the first weld,
thread or flange and includes all piping up to and including the second stop valve
What is common pipe length? - CORRECT ANSWER: 22'
What is required when 2 or more traps discharge into the same header? - CORRECT ANSWER:
A stop valve in each discharge line
What is required when pressure in the discharge pipe can exceed pressure in the inlet pipe? -
CORRECT ANSWER: A Check Valve in the discharge line
What is the approximate support spacing for 6 inch NPS for water and for air/steam? -
CORRECT ANSWER: Water 17'
Steam 21'
What is the boiler proper? - CORRECT ANSWER: Superheaters, Economizers, and the other
pressure parts connecting directly to the boiler without intervening valves
NEWEST 2026-2027 ACTUAL EXAM WITH
COMPLETE 160 QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED
ANSWERS) ALREADY GRADED A+ PROFESSOR
VERIFIED
A standard oxygen cylinder contains _____ - CORRECT ANSWER: 2200 psil
After field assembly of a cast iron steam heating boiler, you are required to hydrostatically test it.
the assembled boiler shall be subjected to a hydrostatic test of not less than what pressure (psig)?
- CORRECT ANSWER: 45 psi
ASME B31.1 power piping code requires that boiler blow off fittings shall be steel & the
thickness of pipe & fittings shall not be less than that of schedule 80 pipe when the boiler
pressure exceeds what pressure (psig)? - CORRECT ANSWER: 100 psi
ASME power piping code requires that when the boiler steam outlet is over what size NPS an
OS &Y valve shall be used? - CORRECT ANSWER: 2 in. NPS
Category___________is the less
hazardous service. It includes fluids that are nontoxic, nonflammable and not dangerous to
human tissue and are at a pressuer less than 150psi and temperature from -20 degrees F through
186 degrees F. - CORRECT ANSWER: D (Fluid Service)
How can the fuel cutoff be connected to the boiler? - CORRECT ANSWER: Through tapped
openings if nonferrous Y's and tees are used
How many pressure gages must a power boiler have and where? - CORRECT ANSWER: At
least one located where easily readable
,How many safety valves or safety relief valves are required on a power boiler? - CORRECT
ANSWER: At least one and two for boilers with greater than 500 sq ft water heating surface
How many sources of feedwater are required on power boilers? - CORRECT ANSWER: 2
sources for all boilers greater than
500 square ft water heating surface area
How must the pressure gage be graduated on a power boiler? - CORRECT ANSWER: To
approx. double the pressure of the safety valve but no less than 1 ½ times that pressure
Safety valves/reliefs are not generated to not let the boiler to rise above what percent? -
CORRECT ANSWER: 6%
The ASME high pressure boiler code limits the use of non ferrous valves.
What is the temperature limitation for a 150 psi class bronze threaded gate valve? - CORRECT
ANSWER: 250° F
The lower edge of the steam connection to a water column shall be? - CORRECT ANSWER:
Not below highest visible water level in gage glass
The upper edge of the water connection to a water column shall be? - CORRECT ANSWER: Not
be above the lowest visible water level in the gage glass
What acceptable method of meeting the requirements for internal inspection and cleaning shall
be made for steam and water connections to a water column? - CORRECT ANSWER: Fitting
with a back outlet at each right
angle turn
What are the approximate hanger rod sizes? - CORRECT ANSWER: 2 in NPS and less: 3/8"
, 2 1/2 in NPS and greater: 1/2"
What are the limits of nonmetallic pipe? - CORRECT ANSWER: 150 psi AND 140° F
What are the minimum connections for feedwater piping in power boilers? - CORRECT
ANSWER: Less than or equal to 100 sq. ft water heating surface ½ "NPS
Greater than 100 sq. ft water heating surface ¾" NPS
What does the feedwater piping for all boilers except high temp water include? - CORRECT
ANSWER: It extends through the required stop valve and check valve
What is boiler external piping? - CORRECT ANSWER: Piping that begins at the first weld,
thread or flange and includes all piping up to and including the second stop valve
What is common pipe length? - CORRECT ANSWER: 22'
What is required when 2 or more traps discharge into the same header? - CORRECT ANSWER:
A stop valve in each discharge line
What is required when pressure in the discharge pipe can exceed pressure in the inlet pipe? -
CORRECT ANSWER: A Check Valve in the discharge line
What is the approximate support spacing for 6 inch NPS for water and for air/steam? -
CORRECT ANSWER: Water 17'
Steam 21'
What is the boiler proper? - CORRECT ANSWER: Superheaters, Economizers, and the other
pressure parts connecting directly to the boiler without intervening valves
