MASS LP INSTALLERS QUESTIONS AND ANSWERS
Where do you file a permit for work to be done in buildings owned or used by the state
of mass? - Answers :State Inspector
When pressure testing a system over 1 million BTU, which doesn't apply? Test 1 hour
for each 200' of developed length, tests at 10x working pressure, max test pressure 100
psi, or max test length is 24 hours. - Answers :Test 1 hour for each 200' of developed
length
What is the horizontal distance from the discharge of a regulator vent to an opening
below - Answers :3'
How many cycles do you need to keep continuing education certificates? - Answers :3
On an LP-gas system, what is considered to be the "point of delivery"? - Answers
:Outlet of 1st stage
How fast does a spill switch need to work? - Answers :30 seconds
If a firing rate in a combustion chamber exceeds 1,000,000 BTUs but is less than
5,000,000 what is required? - Answers :2 shutoffs in series, or one with overtravel
interlock
When using gas pressure boosters, which of the following apply?
A. All must meet product-acceptance requirements
B. the serving gas supplier has provided authorization
C. gas pressure boosters shall be located in well ventilated spaces and readily
accessible
d. all of the above - Answers :All of the above
Apprentice plumber, apprentice gas fitter, or MA LP Installer must.... - Answers :Show
license when asked by the inspector.
What percentage of vent height can the length of a single walled vent connector be? -
Answers :75%
What percentage of vent height can the length of type B double walled vent connector
be? - Answers :100%
What is the maximum pressure for natural gas in a house? - Answers :14" WC
Within how many feet of an appliance does the shutoff need to be? - Answers :6'
, How far does a roof hatch need to be from the edge of a roof to not need guardrails? -
Answers :6'
What is the maximum pressure allowed for CSST? - Answers :14" WC
If the maximum firing rate per combustion chamber is _________________ BTU or
greater, gas pressure supervision shall be provided by listed pressure switches or
combination high/low switch, interlocked to accomplish safety shutdown in the event of
either high or low pressure. - Answers :1,000,000
Max spacing for support for CSST on a rooftop is every _______ - Answers :48"
A vacuum is considered to be any pressure that is? - Answers :Less than atmospheric
pressure
If an UG gas line runs under a building, which is not required
A. Conduit must terminate outside building
B. Sleeves in same material as pipe
C.Terminate 4' above grade
D. Shall be installed to prevent entrance of water and insects - Answers :D
What is not an acceptable material for LPG piping
A. Copper
B. PE
C. Butylenes
D. Brass - Answers :C. Butylenes
How far above a forced air inlet must a vent be terminated if within 10' horizontally? -
Answers :3'
Can you vent into a mechanical vent under a positive pressure (category 1)? - Answers
:No
What is not an acceptable material for LPG Piping?
A. Copper
B. PE
C. Galvanized
D. Brass - Answers :C. Galvanized
How far above the floor must you have an opening for makeup air? - Answers :<12"
How far can a relief discharge from a rigid LP gas regulator from a building opening
below discharge? - Answers :3'
Which method is not approved for connecting pipe?
A. Soldered
Where do you file a permit for work to be done in buildings owned or used by the state
of mass? - Answers :State Inspector
When pressure testing a system over 1 million BTU, which doesn't apply? Test 1 hour
for each 200' of developed length, tests at 10x working pressure, max test pressure 100
psi, or max test length is 24 hours. - Answers :Test 1 hour for each 200' of developed
length
What is the horizontal distance from the discharge of a regulator vent to an opening
below - Answers :3'
How many cycles do you need to keep continuing education certificates? - Answers :3
On an LP-gas system, what is considered to be the "point of delivery"? - Answers
:Outlet of 1st stage
How fast does a spill switch need to work? - Answers :30 seconds
If a firing rate in a combustion chamber exceeds 1,000,000 BTUs but is less than
5,000,000 what is required? - Answers :2 shutoffs in series, or one with overtravel
interlock
When using gas pressure boosters, which of the following apply?
A. All must meet product-acceptance requirements
B. the serving gas supplier has provided authorization
C. gas pressure boosters shall be located in well ventilated spaces and readily
accessible
d. all of the above - Answers :All of the above
Apprentice plumber, apprentice gas fitter, or MA LP Installer must.... - Answers :Show
license when asked by the inspector.
What percentage of vent height can the length of a single walled vent connector be? -
Answers :75%
What percentage of vent height can the length of type B double walled vent connector
be? - Answers :100%
What is the maximum pressure for natural gas in a house? - Answers :14" WC
Within how many feet of an appliance does the shutoff need to be? - Answers :6'
, How far does a roof hatch need to be from the edge of a roof to not need guardrails? -
Answers :6'
What is the maximum pressure allowed for CSST? - Answers :14" WC
If the maximum firing rate per combustion chamber is _________________ BTU or
greater, gas pressure supervision shall be provided by listed pressure switches or
combination high/low switch, interlocked to accomplish safety shutdown in the event of
either high or low pressure. - Answers :1,000,000
Max spacing for support for CSST on a rooftop is every _______ - Answers :48"
A vacuum is considered to be any pressure that is? - Answers :Less than atmospheric
pressure
If an UG gas line runs under a building, which is not required
A. Conduit must terminate outside building
B. Sleeves in same material as pipe
C.Terminate 4' above grade
D. Shall be installed to prevent entrance of water and insects - Answers :D
What is not an acceptable material for LPG piping
A. Copper
B. PE
C. Butylenes
D. Brass - Answers :C. Butylenes
How far above a forced air inlet must a vent be terminated if within 10' horizontally? -
Answers :3'
Can you vent into a mechanical vent under a positive pressure (category 1)? - Answers
:No
What is not an acceptable material for LPG Piping?
A. Copper
B. PE
C. Galvanized
D. Brass - Answers :C. Galvanized
How far above the floor must you have an opening for makeup air? - Answers :<12"
How far can a relief discharge from a rigid LP gas regulator from a building opening
below discharge? - Answers :3'
Which method is not approved for connecting pipe?
A. Soldered
