Massachusetts Journeyman Pipefitter
Exam (Heating, Cooling) PJ-01
Questions and All Correct Answers
2025-2026.
1/2" - Answer Sight Glass Minimum Connection
3/4" - Answer Low Water Cut-off Draw Minimum Connection
1" - Answer Water Column Minimum Connection
3/4" - Answer Control Manifold Minimum Connection
1/4" - Answer Sight Glass Drain Minimum Connection
1" - Answer Bottom Blow-Off Minimum Connection
2 1/2" - Answer Bottom Blow-Off Maximum Connection
2 1/2" - Answer Surface Blow-Down Maximum Connection
3" - Answer Threaded Safety Valve Maximum Connection
4 1/2" - Answer Flanged Safety Valve Maximum Connection
Up to 2" - Answer Steam Stop Valve Non-Indicating
1/2" - Answer Take-off for Control Line Minimum Connection
3" - Answer Socket Welded Fitting Maximum Size
, 350 psi - Answer Malleable Iron Maximum PSI
250 - Answer Cast Iron Maximum PSI
250 Degrees - Answer ASME V Maximum Water Temperature Heating Boiler
500 Square Feet of Heating Surface (2 means of water feed) - Answer When do you need 2
or more heating safety's?
Over 400 psi (cast iron sectional/MAWP 30psi) - Answer When do you need 2 sight glasses?
30 - Answer The ASME code for heating boilers says that an ASME code, Section VIII
expansion tank is required on a hot water boiler when the boiler pressure exceeds what
pressure (psig)?
Steel - Answer When the pressure exceeds 100 psi, the boiler blow-off fittings shall
be_____________?
Not be restricted or reduced - Answer The discharge outlet of a safety valve must
________________________.
20 - Answer An Altitude gauge is required on a hot water supply boiler when altitude is more
than ______ feet.
Gate - Answer The most appropriate valve application for a surface blow-off system would
be a __________ valve.
Auxiliary low-water cut-off - Answer Which device shall cause a safety shut-down (lockout)
requiring a manual reset?
3/4" - Answer What is the minimum size of the drain pipe and the blow-off valve required on
a low water cut-off that has a separate float chamber? __________ inches
Exam (Heating, Cooling) PJ-01
Questions and All Correct Answers
2025-2026.
1/2" - Answer Sight Glass Minimum Connection
3/4" - Answer Low Water Cut-off Draw Minimum Connection
1" - Answer Water Column Minimum Connection
3/4" - Answer Control Manifold Minimum Connection
1/4" - Answer Sight Glass Drain Minimum Connection
1" - Answer Bottom Blow-Off Minimum Connection
2 1/2" - Answer Bottom Blow-Off Maximum Connection
2 1/2" - Answer Surface Blow-Down Maximum Connection
3" - Answer Threaded Safety Valve Maximum Connection
4 1/2" - Answer Flanged Safety Valve Maximum Connection
Up to 2" - Answer Steam Stop Valve Non-Indicating
1/2" - Answer Take-off for Control Line Minimum Connection
3" - Answer Socket Welded Fitting Maximum Size
, 350 psi - Answer Malleable Iron Maximum PSI
250 - Answer Cast Iron Maximum PSI
250 Degrees - Answer ASME V Maximum Water Temperature Heating Boiler
500 Square Feet of Heating Surface (2 means of water feed) - Answer When do you need 2
or more heating safety's?
Over 400 psi (cast iron sectional/MAWP 30psi) - Answer When do you need 2 sight glasses?
30 - Answer The ASME code for heating boilers says that an ASME code, Section VIII
expansion tank is required on a hot water boiler when the boiler pressure exceeds what
pressure (psig)?
Steel - Answer When the pressure exceeds 100 psi, the boiler blow-off fittings shall
be_____________?
Not be restricted or reduced - Answer The discharge outlet of a safety valve must
________________________.
20 - Answer An Altitude gauge is required on a hot water supply boiler when altitude is more
than ______ feet.
Gate - Answer The most appropriate valve application for a surface blow-off system would
be a __________ valve.
Auxiliary low-water cut-off - Answer Which device shall cause a safety shut-down (lockout)
requiring a manual reset?
3/4" - Answer What is the minimum size of the drain pipe and the blow-off valve required on
a low water cut-off that has a separate float chamber? __________ inches
