G2 STUDY GUIDE EXAM 2026 QUESTIONS
WITH CORRECT ANSWERS GUARANTEED TO
PASS
◉ 3/8 NPS black iron pipe shall?
a. Not be used for propane
b. Not be used in a concealed location
c. Not be used for natural gas
d. Not be used for indoors. Answer: Not be used in a concealed
location (6.3.9)
◉ A corrugated metal gas connector connected to a range must not
exceed?
a. 6'
b. 5'
c. 3'
d. 4'. 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. 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. 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. 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. 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. 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. 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'. 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'. Answer: 10' (3m) (Table 6.2)
WITH CORRECT ANSWERS GUARANTEED TO
PASS
◉ 3/8 NPS black iron pipe shall?
a. Not be used for propane
b. Not be used in a concealed location
c. Not be used for natural gas
d. Not be used for indoors. Answer: Not be used in a concealed
location (6.3.9)
◉ A corrugated metal gas connector connected to a range must not
exceed?
a. 6'
b. 5'
c. 3'
d. 4'. 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. 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. 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. 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. 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. 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. 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'. 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'. Answer: 10' (3m) (Table 6.2)
