Massachusetts Plumbing Exam with
All Correct Answers Graded A+ 2025-
2026.
single dwelling, minimum gallons of sewage ejector pump - Answer 20 gallons
minimum size vent through a roof - Answer 2 inch or 2"
you must notify dig safe how many hours prior to digging - Answer 48 hours
plumbing vent through the roof shall be how many inches - Answer 18"-24"
the change in diameter of a vent terminal shall be how many inches below the roof - Answer
12"
what type of waste and vent may not be used as a went vent - Answer kitchen sink
thermal expansion tank is required when ? - Answer a reduced pressure backflow preventer
is installed
the actual capacity of a hot water tank must be within what percent of the capacity stamped on
the tank itself - Answer 7.5%
a reduced pressure zone back flow preventer is equipped with what - Answer two pressure
valves and one intermediate vent
what is the minimum size discharge indirect waste for safe waste pan - Answer 1"
which one of these in a commercial kitchen need to be protected by a grease interceptor -
Answer wok station
true or false, you may install a trap on a indirect waste main - Answer true
, are you allowed to indirect waste a pre-rinse sink for a dishwasher in a commercial kitchen -
Answer yes
a sterilizer having a drain connection must connect by what means to the sanitary drainage
system - Answer through a properly installed separator
what is the best form of back flow prevention - Answer air gap
what does an anti-siphon vacuum breaker protect the potable water system against - Answer
back siphonage
appliance that operates with a positive vent static pressure and with a gas temperature that can
cause excessive condensate is defined as - Answer category IV
appliance that operates with a non positive vent static pressure and with vent gas temperature
that avoids excessive condensate is defined as - Answer category I
appliance that operates with a non possitive vent static pressure and with vent gas temperature
that can cause excessive condensate is defined as - Answer category III
plastic gas pipe and fittings may be only used - Answer outside underground
a residential gas appliance connector shall not exceed what length - Answer 48"
the vent line from a second stage LP regulator installed outdoors must discharge at least how
many feet horizontally away from window located below the vent - Answer 3 feet
how many test need to be done when installing a CSST piping system - Answer 3
when is a carbon monoxide detector installation required - Answer when installing any
vented gas appliance
when purging gas to an outside location from piping system, how far away from a source of
ignition must the termination be - Answer 10 feet
All Correct Answers Graded A+ 2025-
2026.
single dwelling, minimum gallons of sewage ejector pump - Answer 20 gallons
minimum size vent through a roof - Answer 2 inch or 2"
you must notify dig safe how many hours prior to digging - Answer 48 hours
plumbing vent through the roof shall be how many inches - Answer 18"-24"
the change in diameter of a vent terminal shall be how many inches below the roof - Answer
12"
what type of waste and vent may not be used as a went vent - Answer kitchen sink
thermal expansion tank is required when ? - Answer a reduced pressure backflow preventer
is installed
the actual capacity of a hot water tank must be within what percent of the capacity stamped on
the tank itself - Answer 7.5%
a reduced pressure zone back flow preventer is equipped with what - Answer two pressure
valves and one intermediate vent
what is the minimum size discharge indirect waste for safe waste pan - Answer 1"
which one of these in a commercial kitchen need to be protected by a grease interceptor -
Answer wok station
true or false, you may install a trap on a indirect waste main - Answer true
, are you allowed to indirect waste a pre-rinse sink for a dishwasher in a commercial kitchen -
Answer yes
a sterilizer having a drain connection must connect by what means to the sanitary drainage
system - Answer through a properly installed separator
what is the best form of back flow prevention - Answer air gap
what does an anti-siphon vacuum breaker protect the potable water system against - Answer
back siphonage
appliance that operates with a positive vent static pressure and with a gas temperature that can
cause excessive condensate is defined as - Answer category IV
appliance that operates with a non positive vent static pressure and with vent gas temperature
that avoids excessive condensate is defined as - Answer category I
appliance that operates with a non possitive vent static pressure and with vent gas temperature
that can cause excessive condensate is defined as - Answer category III
plastic gas pipe and fittings may be only used - Answer outside underground
a residential gas appliance connector shall not exceed what length - Answer 48"
the vent line from a second stage LP regulator installed outdoors must discharge at least how
many feet horizontally away from window located below the vent - Answer 3 feet
how many test need to be done when installing a CSST piping system - Answer 3
when is a carbon monoxide detector installation required - Answer when installing any
vented gas appliance
when purging gas to an outside location from piping system, how far away from a source of
ignition must the termination be - Answer 10 feet
