1|Page
Lp installers practice exam Questions and
Answers with Solutions
Where do you file a permit for work to be done in buildings
owned or used by the State of Mass ? - ANSWER State Inspector
When pressure testing a system over 1 million btu , which
doesn't apply ? - ANSWER Test 1 hour for each 200 ' of
developed length
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
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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
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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)
Lp installers practice exam Questions and
Answers with Solutions
Where do you file a permit for work to be done in buildings
owned or used by the State of Mass ? - ANSWER State Inspector
When pressure testing a system over 1 million btu , which
doesn't apply ? - ANSWER Test 1 hour for each 200 ' of
developed length
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
,2|Page
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
, 3|Page
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)
