G2 Exam Prep [ACTUAL EXAM] LATEST VERSION
[QUESTIONS AND ANSWERS] WITH PRACTICE EXAM
DETAILED AND VERIFIED FOR GUARANTEED PASS-
LATEST UPDATE 2025 GRADED A
A corrugated metal gas connector connected to a range must not exceed?
a. 6'
b. 5'
c. 3'
d. 4' - CORRECT ANSWER 6' (6.21.3)
A manual shut-off valve shall be installed?
a. only on natural gas appliances
b. in either drop of riser of a residential appliance
c. downstream of the union
d. at the drip pocket - CORRECT ANSWER In either drop of riser of a residential
appliance (6.18.2)
Black iron pipe 2 1/2 NPS at 150' long shall be pressure tested to?
a. The greater of 50psig or 1.5 times the maximum operation pressure for 180 minutes
b. 50 psig for 180 minutes
c. 1.5 times the maximum operation pressure for 180 minutes
d. 50 psig for 60 minutes - CORRECT ANSWER 50 psig for 60 minutes (Table 6.3)
Buried piping or tubing shall be?
a. only copper type L coated, type G coated, type K uncoated
b. only copper type K, L or type G
c. schedule 50 ASTM A-53
d. only copper type L or G coated - CORRECT ANSWER Only copper type L coated,
type G coated, type K uncoated (6.2.7)
What is pressure drop?
a. The difference in the static pressure at the meter, and the working pressure at the
appliance regulator
b. The difference between the U tube manometer is the end that is open to the
atmosphere and the pressurized side when the appliance regulator is working
,c. The difference between supply pressure and appliance manifold pressure when the
appliance calls for heat
d. The difference in the working pressure at the gas meter, and the working pressure at
the appliance regulator - CORRECT ANSWER The difference in the working
pressure at the gas meter, and the working pressure at the appliance regulator
Fittings used for steel piping may be made from?
a. brass or iron
b. copper to malleable iron
c. steel and plastic
d. malleable iron and steel - CORRECT ANSWER Malleable iron and steel (6.2.2)
Posts protecting piping and tubing entering a building from vehicular damage shall be?
a. clearly marked and identified with yellow paint
b. Be spaced not more than 48" apart
c. Buried not less than 36" below grade
d. Made from 6x6 pressure treated wood - CORRECT ANSWER Buried not less than
36" below grade
(6.16.15)
The equivalent length of a 2 1/2 NPS forged tee is?
a. 9.25'
b. 12.4'
c. 15.3'
d. 10.3' - CORRECT ANSWER 9.25' (Table A 16)
What is the maximum horizontal spacing of supports for N.P.S. 1 1/4 inch gas pipe?
a. 8'
b. 15'
c. 6'
d. 10' - CORRECT ANSWER 10' (3m) (Table 6.2)
When gas piping enters a building, it must?
a. Enter above grade
b. Be taped, painted, and sleeved
c. Have a tracer wire
d. Enter below grade - CORRECT ANSWER Enter above grade (6.15.8)
When sizing a branch line, what is the minimum size of job fabricated welding fittings
that can be used on a NPS 6 gas supply header?
,a. 2" NPS
b. 3/4" NPS
c. 3" NPS
d. 1/2" NPS - CORRECT ANSWER 3/4" NPS (6.8.8)
A dirt pockets shall be installed at the bottom of any piping or tubing, on the final drop
serving an appliance other than a(n)
a. Unit Heater
b. Furnace
c. Clothes dryer
d. Boiler - CORRECT ANSWER Clothes dryer (6.13.1)
Direct-vent wall furnace shall use what maximum length of corrugated metal gas
connector?
a. 6 ft.
b. 4 ft.
c. 8 ft.
d. 2 ft. - CORRECT ANSWER 2 ft. (6.21.3(c))
Every gas hose and gas fitting shall have a minimum working pressure of what.
a. 275 PSIG minimum or the setting of the hydrostatic relief valves.
b. 350 PSIG for piping and tubing operating at a container.
c. 350 PSIG
d. 250 PSIG when connected to the outlet of a pump or compressor. - CORRECT
ANSWER 350 PSIG (6.2.9)
What are the requirements for back filling underground piping or tubing?
a. It shall not have stones larger than 38 mm
b. The fill material shall contain no sharp objects.
c. A trench must be dug 15 inches deep
d. All of the choices - CORRECT ANSWER The fill material shall contain no sharp
objects (6.15.6)
Question 17
What is the approximate purging time for NPS 1 that is 40 feet in length?
a. 7 Seconds
b. 28 Seconds
c. 14 Seconds
d. 43 Seconds - CORRECT ANSWER 28 seconds (Annex H Table H.1)
, What is the maximum distance a readily accessible manual shut-off valve may be
installed from an appliance?
a. 2 ft. and identified
b. 10 ft. and identified
c. 25 ft. and identified
d. 50 ft. and identified - CORRECT ANSWER 50 ft. and identified (6.18.2(d))
What is the minimum unthreaded portion of a piping outlet required when installing a
gas piping through a floor for a range?
a. 2 Inches
b. 6 Inches
c. 3 Inches
d. 12 Inches - CORRECT ANSWER 2 inches (6.12.2)
When a high pressure test is required on a gas piping system, what type of medium
would you use to perform this test.
a. High Pressure gas
b. Static pressure using gas
c. Low pressure gas
d. Air or an inert gas - CORRECT ANSWER Air or an inert gas
Nesting of bushings is permitted
True
False - CORRECT ANSWER False (6.14.2)
Underground piping shall be joined or connected by welding, approved mechanical
compression, or press-connect fittings.
True
False - CORRECT ANSWER True (6.15.2)
A manual shut off valve shall be installed
a. within a maximum of 50 ft (17 m) of the individual residential appliance that it serves.
b. Identified by a metal tag attached to the valve
c. in either the drop or riser of a residential appliance.
d. All of the choices - CORRECT ANSWER All of the choices (6.18.2)
What is the allowable maximum distance piping supports should be spaced on a 4 inch
horizontal gas line?
a. 25 feet (7.5 m)
[QUESTIONS AND ANSWERS] WITH PRACTICE EXAM
DETAILED AND VERIFIED FOR GUARANTEED PASS-
LATEST UPDATE 2025 GRADED A
A corrugated metal gas connector connected to a range must not exceed?
a. 6'
b. 5'
c. 3'
d. 4' - CORRECT ANSWER 6' (6.21.3)
A manual shut-off valve shall be installed?
a. only on natural gas appliances
b. in either drop of riser of a residential appliance
c. downstream of the union
d. at the drip pocket - CORRECT ANSWER In either drop of riser of a residential
appliance (6.18.2)
Black iron pipe 2 1/2 NPS at 150' long shall be pressure tested to?
a. The greater of 50psig or 1.5 times the maximum operation pressure for 180 minutes
b. 50 psig for 180 minutes
c. 1.5 times the maximum operation pressure for 180 minutes
d. 50 psig for 60 minutes - CORRECT ANSWER 50 psig for 60 minutes (Table 6.3)
Buried piping or tubing shall be?
a. only copper type L coated, type G coated, type K uncoated
b. only copper type K, L or type G
c. schedule 50 ASTM A-53
d. only copper type L or G coated - CORRECT ANSWER Only copper type L coated,
type G coated, type K uncoated (6.2.7)
What is pressure drop?
a. The difference in the static pressure at the meter, and the working pressure at the
appliance regulator
b. The difference between the U tube manometer is the end that is open to the
atmosphere and the pressurized side when the appliance regulator is working
,c. The difference between supply pressure and appliance manifold pressure when the
appliance calls for heat
d. The difference in the working pressure at the gas meter, and the working pressure at
the appliance regulator - CORRECT ANSWER The difference in the working
pressure at the gas meter, and the working pressure at the appliance regulator
Fittings used for steel piping may be made from?
a. brass or iron
b. copper to malleable iron
c. steel and plastic
d. malleable iron and steel - CORRECT ANSWER Malleable iron and steel (6.2.2)
Posts protecting piping and tubing entering a building from vehicular damage shall be?
a. clearly marked and identified with yellow paint
b. Be spaced not more than 48" apart
c. Buried not less than 36" below grade
d. Made from 6x6 pressure treated wood - CORRECT ANSWER Buried not less than
36" below grade
(6.16.15)
The equivalent length of a 2 1/2 NPS forged tee is?
a. 9.25'
b. 12.4'
c. 15.3'
d. 10.3' - CORRECT ANSWER 9.25' (Table A 16)
What is the maximum horizontal spacing of supports for N.P.S. 1 1/4 inch gas pipe?
a. 8'
b. 15'
c. 6'
d. 10' - CORRECT ANSWER 10' (3m) (Table 6.2)
When gas piping enters a building, it must?
a. Enter above grade
b. Be taped, painted, and sleeved
c. Have a tracer wire
d. Enter below grade - CORRECT ANSWER Enter above grade (6.15.8)
When sizing a branch line, what is the minimum size of job fabricated welding fittings
that can be used on a NPS 6 gas supply header?
,a. 2" NPS
b. 3/4" NPS
c. 3" NPS
d. 1/2" NPS - CORRECT ANSWER 3/4" NPS (6.8.8)
A dirt pockets shall be installed at the bottom of any piping or tubing, on the final drop
serving an appliance other than a(n)
a. Unit Heater
b. Furnace
c. Clothes dryer
d. Boiler - CORRECT ANSWER Clothes dryer (6.13.1)
Direct-vent wall furnace shall use what maximum length of corrugated metal gas
connector?
a. 6 ft.
b. 4 ft.
c. 8 ft.
d. 2 ft. - CORRECT ANSWER 2 ft. (6.21.3(c))
Every gas hose and gas fitting shall have a minimum working pressure of what.
a. 275 PSIG minimum or the setting of the hydrostatic relief valves.
b. 350 PSIG for piping and tubing operating at a container.
c. 350 PSIG
d. 250 PSIG when connected to the outlet of a pump or compressor. - CORRECT
ANSWER 350 PSIG (6.2.9)
What are the requirements for back filling underground piping or tubing?
a. It shall not have stones larger than 38 mm
b. The fill material shall contain no sharp objects.
c. A trench must be dug 15 inches deep
d. All of the choices - CORRECT ANSWER The fill material shall contain no sharp
objects (6.15.6)
Question 17
What is the approximate purging time for NPS 1 that is 40 feet in length?
a. 7 Seconds
b. 28 Seconds
c. 14 Seconds
d. 43 Seconds - CORRECT ANSWER 28 seconds (Annex H Table H.1)
, What is the maximum distance a readily accessible manual shut-off valve may be
installed from an appliance?
a. 2 ft. and identified
b. 10 ft. and identified
c. 25 ft. and identified
d. 50 ft. and identified - CORRECT ANSWER 50 ft. and identified (6.18.2(d))
What is the minimum unthreaded portion of a piping outlet required when installing a
gas piping through a floor for a range?
a. 2 Inches
b. 6 Inches
c. 3 Inches
d. 12 Inches - CORRECT ANSWER 2 inches (6.12.2)
When a high pressure test is required on a gas piping system, what type of medium
would you use to perform this test.
a. High Pressure gas
b. Static pressure using gas
c. Low pressure gas
d. Air or an inert gas - CORRECT ANSWER Air or an inert gas
Nesting of bushings is permitted
True
False - CORRECT ANSWER False (6.14.2)
Underground piping shall be joined or connected by welding, approved mechanical
compression, or press-connect fittings.
True
False - CORRECT ANSWER True (6.15.2)
A manual shut off valve shall be installed
a. within a maximum of 50 ft (17 m) of the individual residential appliance that it serves.
b. Identified by a metal tag attached to the valve
c. in either the drop or riser of a residential appliance.
d. All of the choices - CORRECT ANSWER All of the choices (6.18.2)
What is the allowable maximum distance piping supports should be spaced on a 4 inch
horizontal gas line?
a. 25 feet (7.5 m)
