Maine Gas Exam (Latest Update 2026 /
2027) 100% Correct Questions & Answer
A large house is being built with one boiler 34 feet away from the meter that uses
natural gas; all other appliances are electric. What size CSST stainless steel tubing
should be installed to supply 220 cubic feet of natural gas per hour with an inlet
pressure less than 2psi, pressure drop of 0.5 in w.c. and a specific gravity of 0.60? -
Correct answer 37
What is the MINIMUM clearance that shall be required for the exhaust duct of a Type 2
clothes dryer from combustible materials? - Correct answer 6"
Given: There is a bakery with with two large ovens back to back installed using a
combined total of 1225 cubic feet of gas per hour and located 61 feet from the natural
gas supply meter. The bakery is supplied with natural gas with a specific gravity of 0.60
and a pressure drop of 0.3 in. w.c. and an inlet pressure of less than 2 psi.
What size steel pipe is needed to supply the ovens with gas? - Correct answer 2-1/2 "
,What is the MINIMUM clearance for a listed duct furnace from adjacent walls, ceilings
and floors made of combustible materials? - Correct answer 6"
What is the MAXIMUM length of a 10" horizontal vent connector? - Correct answer 15
Feet
What is the atmospheric pressure (psia) of air on the surface of earth at sea level? -
Correct answer 14.7lbs
When a food service appliance is installed on a combustible floor with legs not less
than 8" long the floor shall be protected by a millboard and sheet metal for what
MINIMUM distance beyond the appliance on each side? - Correct answer 6"
What is the MINIMUM length nipple that can be used for a sediment trap on a gas line?
- Correct answer 3"
Appliances installed in an underground parking garage shall be installed to meet
which of the following standards? - Correct answer NFPA 88A
, Nonmetallic pipe used for underground gas shall have a tracer wire installed adjacent
to the pipe. What MINIMUM size wire should be used? - Correct answer AWG 14
A 127 foot long gas line is being installed in metallic pipe. The system is undiluted LP
gas with an inlet pressure of 11.0 in w.c., with a 0.5 in. w.c. pressure drop and a specific
gravity of 1.50. The appliance requires 1,670 cubic BTU of LP gas. What size metallic
pipe should be installed? - Correct answer 2"
What is the MINIMUM amount of time required to perform a pressure test on a gas line
in a single family home? - Correct answer 10 minutes
When cutting threads on a 2" steel pipe that is being used for a gas line, what is the
approximate length of the threaded portion for each joint? - Correct answer 1-0"
A commercial building has a 45 foot tall chimney with a total of 341,000 Btu input from
one Category 1 natural draft vented appliance that has a Type B metal connector with a
10 foot lateral. What size masonry chimney is needed? - Correct answer 8"
2027) 100% Correct Questions & Answer
A large house is being built with one boiler 34 feet away from the meter that uses
natural gas; all other appliances are electric. What size CSST stainless steel tubing
should be installed to supply 220 cubic feet of natural gas per hour with an inlet
pressure less than 2psi, pressure drop of 0.5 in w.c. and a specific gravity of 0.60? -
Correct answer 37
What is the MINIMUM clearance that shall be required for the exhaust duct of a Type 2
clothes dryer from combustible materials? - Correct answer 6"
Given: There is a bakery with with two large ovens back to back installed using a
combined total of 1225 cubic feet of gas per hour and located 61 feet from the natural
gas supply meter. The bakery is supplied with natural gas with a specific gravity of 0.60
and a pressure drop of 0.3 in. w.c. and an inlet pressure of less than 2 psi.
What size steel pipe is needed to supply the ovens with gas? - Correct answer 2-1/2 "
,What is the MINIMUM clearance for a listed duct furnace from adjacent walls, ceilings
and floors made of combustible materials? - Correct answer 6"
What is the MAXIMUM length of a 10" horizontal vent connector? - Correct answer 15
Feet
What is the atmospheric pressure (psia) of air on the surface of earth at sea level? -
Correct answer 14.7lbs
When a food service appliance is installed on a combustible floor with legs not less
than 8" long the floor shall be protected by a millboard and sheet metal for what
MINIMUM distance beyond the appliance on each side? - Correct answer 6"
What is the MINIMUM length nipple that can be used for a sediment trap on a gas line?
- Correct answer 3"
Appliances installed in an underground parking garage shall be installed to meet
which of the following standards? - Correct answer NFPA 88A
, Nonmetallic pipe used for underground gas shall have a tracer wire installed adjacent
to the pipe. What MINIMUM size wire should be used? - Correct answer AWG 14
A 127 foot long gas line is being installed in metallic pipe. The system is undiluted LP
gas with an inlet pressure of 11.0 in w.c., with a 0.5 in. w.c. pressure drop and a specific
gravity of 1.50. The appliance requires 1,670 cubic BTU of LP gas. What size metallic
pipe should be installed? - Correct answer 2"
What is the MINIMUM amount of time required to perform a pressure test on a gas line
in a single family home? - Correct answer 10 minutes
When cutting threads on a 2" steel pipe that is being used for a gas line, what is the
approximate length of the threaded portion for each joint? - Correct answer 1-0"
A commercial building has a 45 foot tall chimney with a total of 341,000 Btu input from
one Category 1 natural draft vented appliance that has a Type B metal connector with a
10 foot lateral. What size masonry chimney is needed? - Correct answer 8"
