1. What is the primary code governing gas piping installations in most
jurisdictions?
o A) UPC
o B) NFPA 54 (National Fuel Gas Code)
o C) IRC
o D) ASHRAE
o Answer: B
2. The minimum burial depth for gas piping in normal soil conditions
is:
o A) 6 inches
o B) 12 inches
o C) 18 inches
o D) 24 inches
o Answer: C
3. What does CSST stand for?
o A) Corrugated Steel Service Tubing
o B) Copper Service Supply Tubing
o C) Corrugated Stainless Steel Tubing
o D) Carbon Steel Service Tubing
o Answer: C
4. The maximum allowable pressure drop in a gas piping system should
not exceed:
o A) 0.25 inches water column
, o B) 0.5 inches water column
o C) 1.0 inches water column
o D) 2.0 inches water column
o Answer: B
5. What is the standard test pressure for gas piping systems operating
at 0.5 psi or less?
o A) 3 psi
o B) 5 psi
o C) 10 psi
o D) 15 psi
o Answer: A
6. Gas piping in concealed locations must be:
o A) Painted yellow
o B) Accessible for inspection
o C) Protected from corrosion
o D) Both B and C
o Answer: D
7. The minimum clearance between a gas meter and an ignition source
is:
o A) 1 foot
o B) 3 feet
o C) 5 feet
o D) 10 feet
o Answer: B
8. Black iron pipe must be protected from corrosion when:
o A) Installed above ground only
o B) Installed underground
o C) Used with natural gas
, o D) Never required
o Answer: B
9. What type of joint is NOT acceptable for gas piping?
o A) Threaded
o B) Welded
o C) Compression fittings
o D) Slip joints
o Answer: D
10.The minimum size gas supply line for a residential furnace is
typically:
o A) 1/4 inch
o B) 3/8 inch
o C) 1/2 inch
o D) 3/4 inch
o Answer: C
11.Liquefied petroleum gas (LP) is heavier than air and should be
stored:
o A) At any level
o B) Above ground level
o C) Below ground level is prohibited
o D) In any ventilated space
o Answer: C
12.What is the BTU content of one cubic foot of natural gas
(approximate)?
o A) 500 BTU
o B) 750 BTU
o C) 1000 BTU
o D) 1500 BTU
, o Answer: C
13.Gas pipe threading dies should cut threads according to:
o A) ANSI B1.20.1
o B) ASTM standards
o C) Manufacturer specifications
o D) Local codes only
o Answer: A
14.The minimum distance between parallel gas lines should be:
o A) 1 inch
o B) 3 inches
o C) 6 inches
o D) No minimum specified
o Answer: C
15.What is the maximum working pressure for Schedule 40 steel pipe in
gas service?
o A) 25 psi
o B) 50 psi
o C) 100 psi
o D) 125 psi
o Answer: D
16.Gas appliances must be connected with:
o A) Approved flexible connectors or rigid pipe
o B) Garden hose
o C) PVC pipe
o D) Copper tubing only
o Answer: A
17.The minimum clearance from a gas meter to a window that opens is:
o A) 1 foot
jurisdictions?
o A) UPC
o B) NFPA 54 (National Fuel Gas Code)
o C) IRC
o D) ASHRAE
o Answer: B
2. The minimum burial depth for gas piping in normal soil conditions
is:
o A) 6 inches
o B) 12 inches
o C) 18 inches
o D) 24 inches
o Answer: C
3. What does CSST stand for?
o A) Corrugated Steel Service Tubing
o B) Copper Service Supply Tubing
o C) Corrugated Stainless Steel Tubing
o D) Carbon Steel Service Tubing
o Answer: C
4. The maximum allowable pressure drop in a gas piping system should
not exceed:
o A) 0.25 inches water column
, o B) 0.5 inches water column
o C) 1.0 inches water column
o D) 2.0 inches water column
o Answer: B
5. What is the standard test pressure for gas piping systems operating
at 0.5 psi or less?
o A) 3 psi
o B) 5 psi
o C) 10 psi
o D) 15 psi
o Answer: A
6. Gas piping in concealed locations must be:
o A) Painted yellow
o B) Accessible for inspection
o C) Protected from corrosion
o D) Both B and C
o Answer: D
7. The minimum clearance between a gas meter and an ignition source
is:
o A) 1 foot
o B) 3 feet
o C) 5 feet
o D) 10 feet
o Answer: B
8. Black iron pipe must be protected from corrosion when:
o A) Installed above ground only
o B) Installed underground
o C) Used with natural gas
, o D) Never required
o Answer: B
9. What type of joint is NOT acceptable for gas piping?
o A) Threaded
o B) Welded
o C) Compression fittings
o D) Slip joints
o Answer: D
10.The minimum size gas supply line for a residential furnace is
typically:
o A) 1/4 inch
o B) 3/8 inch
o C) 1/2 inch
o D) 3/4 inch
o Answer: C
11.Liquefied petroleum gas (LP) is heavier than air and should be
stored:
o A) At any level
o B) Above ground level
o C) Below ground level is prohibited
o D) In any ventilated space
o Answer: C
12.What is the BTU content of one cubic foot of natural gas
(approximate)?
o A) 500 BTU
o B) 750 BTU
o C) 1000 BTU
o D) 1500 BTU
, o Answer: C
13.Gas pipe threading dies should cut threads according to:
o A) ANSI B1.20.1
o B) ASTM standards
o C) Manufacturer specifications
o D) Local codes only
o Answer: A
14.The minimum distance between parallel gas lines should be:
o A) 1 inch
o B) 3 inches
o C) 6 inches
o D) No minimum specified
o Answer: C
15.What is the maximum working pressure for Schedule 40 steel pipe in
gas service?
o A) 25 psi
o B) 50 psi
o C) 100 psi
o D) 125 psi
o Answer: D
16.Gas appliances must be connected with:
o A) Approved flexible connectors or rigid pipe
o B) Garden hose
o C) PVC pipe
o D) Copper tubing only
o Answer: A
17.The minimum clearance from a gas meter to a window that opens is:
o A) 1 foot
