NM LP-3S RETAIL SALE OF LP GAS ACTUAL
EXAM PAPER 2026 COMPLETE QUESTIONS
WITH FULL SOLUTIONS GRADED A+
◉ When a vent on a regulator , what is the horizontal distance from
the discharge of the vent to an opening located below ? Answer: 3
feet
◉ How many cycles do you need to keep continuing education
certificates ? Answer: 3
◉ On an LP - Gas system , what is considered to be the " Point of
Delivery " ? Answer: Outlet of 1st stage
◉ How fast does a spill switch need to work ? Answer: 30 seconds
◉ If the firing rate in a combustion chamber exceeds 1,000,000 BTU
, but less than 5,000,000 , what is required ? Answer: 2 shut offs in
series , or one with overtravel interlock
◉ When using gas pressure boosters , which of the following apply ?
Answer: All must meet product - acceptance requirements The
serving gas supplier has provided written authorization Gas
,pressure boosters shall be located in well - ventilated spaces , and
readily accessible
◉ What percentage of vent height can the length of a single - walled
vent connector be ? Answer: 75 %
◉ What percentage of vent height can the length of Type B , double -
walled vent connector be ? Answer: 100 %
◉ What is the max pressure for natural gas in a house ? Answer: 14 "
WC
◉ Within how many feet of an appliance does the shut off need to be
? Answer: 6'
◉ How far does a roof hatch need to be from the edge of a roof to not
need guardrails ? Answer: 6'
◉ What is the maximum pressure allowed for CSST . Answer: 14 "
WC
◉ If the maximum firing rate per combustion chamber is ____ , BTU
or greater , gas pressure supervision provided by listed pressure
switches or combination high / low switch , interlocked to
, accomplish safety shutdown in event of either high or low pressure .
Answer: 1,000,000
◉ Max spacing for support for CSST on a rooftop is every . Answer:
Blocks used for Support 48 "
◉ A vacuum is considered to be any pressure that is Answer: Less
than atmospheric pressure (14.7 psi)
◉ If an UG gas line runs under a building , what is required ?
Answer: Conduit must terminate outside building ,Sleeved in same
material as pipe Terminate 4 ' above grade
◉ Apprentice plumber , apprentice gas fitter , or MA Lic . LP Installer
Answer: Must show license when asked by the Inspector
◉ What is not an acceptable material for LPG piping Answer:
Butylenes
◉ How far above a forced air inlet must a vent be terminated it
within 10 ft horizontally ? Answer: 3 '
◉ Can you vent into a mechanical vent under a positive pressure ?
Answer: no
EXAM PAPER 2026 COMPLETE QUESTIONS
WITH FULL SOLUTIONS GRADED A+
◉ When a vent on a regulator , what is the horizontal distance from
the discharge of the vent to an opening located below ? Answer: 3
feet
◉ How many cycles do you need to keep continuing education
certificates ? Answer: 3
◉ On an LP - Gas system , what is considered to be the " Point of
Delivery " ? Answer: Outlet of 1st stage
◉ How fast does a spill switch need to work ? Answer: 30 seconds
◉ If the firing rate in a combustion chamber exceeds 1,000,000 BTU
, but less than 5,000,000 , what is required ? Answer: 2 shut offs in
series , or one with overtravel interlock
◉ When using gas pressure boosters , which of the following apply ?
Answer: All must meet product - acceptance requirements The
serving gas supplier has provided written authorization Gas
,pressure boosters shall be located in well - ventilated spaces , and
readily accessible
◉ What percentage of vent height can the length of a single - walled
vent connector be ? Answer: 75 %
◉ What percentage of vent height can the length of Type B , double -
walled vent connector be ? Answer: 100 %
◉ What is the max pressure for natural gas in a house ? Answer: 14 "
WC
◉ Within how many feet of an appliance does the shut off need to be
? Answer: 6'
◉ How far does a roof hatch need to be from the edge of a roof to not
need guardrails ? Answer: 6'
◉ What is the maximum pressure allowed for CSST . Answer: 14 "
WC
◉ If the maximum firing rate per combustion chamber is ____ , BTU
or greater , gas pressure supervision provided by listed pressure
switches or combination high / low switch , interlocked to
, accomplish safety shutdown in event of either high or low pressure .
Answer: 1,000,000
◉ Max spacing for support for CSST on a rooftop is every . Answer:
Blocks used for Support 48 "
◉ A vacuum is considered to be any pressure that is Answer: Less
than atmospheric pressure (14.7 psi)
◉ If an UG gas line runs under a building , what is required ?
Answer: Conduit must terminate outside building ,Sleeved in same
material as pipe Terminate 4 ' above grade
◉ Apprentice plumber , apprentice gas fitter , or MA Lic . LP Installer
Answer: Must show license when asked by the Inspector
◉ What is not an acceptable material for LPG piping Answer:
Butylenes
◉ How far above a forced air inlet must a vent be terminated it
within 10 ft horizontally ? Answer: 3 '
◉ Can you vent into a mechanical vent under a positive pressure ?
Answer: no
