Page 1 of 104
Minnesota (MN) 496 Journeyman Fuel Gasfitter
Practice Exam Actual Test Questions and Correct
Answers With Rationales
Exam Coverage – MN 496 Journeyman Fuel Gasfitter (Short Point Form)
• MN Fuel Gas Code (MN Rules 4960 & adopted IFGC 2021/2024 amendments)
• Pipe sizing & gas load calculations (longest run, branch, pressure drop)
• Material specifications (black iron, CSST, PE, copper, fittings)
• Venting & combustion air (Category I-IV, direct vent, power vent)
• Gas appliance connections (flex connectors, shutoffs, drip legs, sediment traps)
• Pressure testing (air, nitrogen, or inert gas; test pressures & duration)
• Corrugated Stainless Steel Tubing (CSST) bonding & grounding (MN specific)
• Underground gas piping (tracer wire, depth, PE, risers, anodes)
• Excess flow valves (EFVs) – when required
• Clearances, supports, protection from damage
• MN amendments to IFGC (cold weather, seismic, licensing scope)
1. Under MN Rule 4960, what is the minimum burial depth for polyethylene (PE) gas piping in a private
driveway (not subject to heavy truck traffic)?
A) 12 inches
B) 18 inches
C) 24 inches
D) 30 inches
, Page 2 of 104
Answer: B
Rationale: MN amendments to IFGC 404.5 require 18 inches minimum cover for PE pipe in driveways and
yards (12 inches for foot traffic only, 24 inches for roads with heavy trucks).
2. A 150,000 BTU/hr furnace and a 50,000 BTU/hr water heater are connected to a 100 foot gas pipe run
(natural gas, 0.5" w.c. pressure drop). What is the minimum inside diameter of black iron pipe required
(using IFGC Table 402.4)?
A) 1/2"
B) 3/4"
C) 1"
D) 1-1/4"
Answer: C
*Rationale: Total load = 200,000 BTU/hr. For 100 ft length at 0.5" w.c. drop, Table 402.4 (natural gas)
shows 1" pipe handles 210,000 BTU/hr. 3/4" handles only 145,000 BTU/hr at that length.*
3. In Minnesota, CSST (corrugated stainless steel tubing) bonding must be connected to:
A) The gas meter housing
B) Any water pipe
, Page 3 of 104
C) The building grounding electrode system with a minimum 6 AWG copper conductor
D) The appliance cabinet
Answer: C
Rationale: MN adopts IFGC 310.3 requiring CSST to be bonded to the electrical service grounding
electrode system using minimum 6 AWG copper. Bonding to the meter or water pipe alone is insufficient.
4. What is the maximum allowable pressure drop from the gas meter to the farthest appliance for
natural gas systems in a MN residence (per IFGC)?
A) 0.1" w.c.
B) 0.3" w.c.
C) 0.5" w.c.
D) 1.0" w.c.
Answer: C
Rationale: IFGC 402.4.2 allows up to 0.5" w.c. pressure drop for natural gas systems operating at 7-14"
w.c. at the meter (low pressure). LP systems allow 0.5" w.c. or as specified.
5. A sediment trap (drip leg) is required at which location?
A) At every appliance connector
, Page 4 of 104
B) At the inlet of each appliance, downstream of the appliance shutoff valve
C) Only at the gas meter outlet
D) Only on LP systems
Answer: B
Rationale: IFGC 408.4 requires a sediment trap at the inlet of each appliance, downstream of the shutoff
valve, to catch debris and condensate. Exceptions include certain stoves and dryers.
6. What is the minimum size of a sediment trap for a 1-1/4" gas line feeding a boiler?
A) 1/2"
B) 3/4"
C) 1-1/4" (same as the line)
D) 2"
Answer: C
Rationale: IFGC 408.4 requires the sediment trap to be the same pipe size as the gas line serving the
appliance, with a capped nipple extending downward.
7. In Minnesota, a fuel gasfitter performing work on a residential CSST system must:
A) Have a MN 496 Journeyman or Master license
Minnesota (MN) 496 Journeyman Fuel Gasfitter
Practice Exam Actual Test Questions and Correct
Answers With Rationales
Exam Coverage – MN 496 Journeyman Fuel Gasfitter (Short Point Form)
• MN Fuel Gas Code (MN Rules 4960 & adopted IFGC 2021/2024 amendments)
• Pipe sizing & gas load calculations (longest run, branch, pressure drop)
• Material specifications (black iron, CSST, PE, copper, fittings)
• Venting & combustion air (Category I-IV, direct vent, power vent)
• Gas appliance connections (flex connectors, shutoffs, drip legs, sediment traps)
• Pressure testing (air, nitrogen, or inert gas; test pressures & duration)
• Corrugated Stainless Steel Tubing (CSST) bonding & grounding (MN specific)
• Underground gas piping (tracer wire, depth, PE, risers, anodes)
• Excess flow valves (EFVs) – when required
• Clearances, supports, protection from damage
• MN amendments to IFGC (cold weather, seismic, licensing scope)
1. Under MN Rule 4960, what is the minimum burial depth for polyethylene (PE) gas piping in a private
driveway (not subject to heavy truck traffic)?
A) 12 inches
B) 18 inches
C) 24 inches
D) 30 inches
, Page 2 of 104
Answer: B
Rationale: MN amendments to IFGC 404.5 require 18 inches minimum cover for PE pipe in driveways and
yards (12 inches for foot traffic only, 24 inches for roads with heavy trucks).
2. A 150,000 BTU/hr furnace and a 50,000 BTU/hr water heater are connected to a 100 foot gas pipe run
(natural gas, 0.5" w.c. pressure drop). What is the minimum inside diameter of black iron pipe required
(using IFGC Table 402.4)?
A) 1/2"
B) 3/4"
C) 1"
D) 1-1/4"
Answer: C
*Rationale: Total load = 200,000 BTU/hr. For 100 ft length at 0.5" w.c. drop, Table 402.4 (natural gas)
shows 1" pipe handles 210,000 BTU/hr. 3/4" handles only 145,000 BTU/hr at that length.*
3. In Minnesota, CSST (corrugated stainless steel tubing) bonding must be connected to:
A) The gas meter housing
B) Any water pipe
, Page 3 of 104
C) The building grounding electrode system with a minimum 6 AWG copper conductor
D) The appliance cabinet
Answer: C
Rationale: MN adopts IFGC 310.3 requiring CSST to be bonded to the electrical service grounding
electrode system using minimum 6 AWG copper. Bonding to the meter or water pipe alone is insufficient.
4. What is the maximum allowable pressure drop from the gas meter to the farthest appliance for
natural gas systems in a MN residence (per IFGC)?
A) 0.1" w.c.
B) 0.3" w.c.
C) 0.5" w.c.
D) 1.0" w.c.
Answer: C
Rationale: IFGC 402.4.2 allows up to 0.5" w.c. pressure drop for natural gas systems operating at 7-14"
w.c. at the meter (low pressure). LP systems allow 0.5" w.c. or as specified.
5. A sediment trap (drip leg) is required at which location?
A) At every appliance connector
, Page 4 of 104
B) At the inlet of each appliance, downstream of the appliance shutoff valve
C) Only at the gas meter outlet
D) Only on LP systems
Answer: B
Rationale: IFGC 408.4 requires a sediment trap at the inlet of each appliance, downstream of the shutoff
valve, to catch debris and condensate. Exceptions include certain stoves and dryers.
6. What is the minimum size of a sediment trap for a 1-1/4" gas line feeding a boiler?
A) 1/2"
B) 3/4"
C) 1-1/4" (same as the line)
D) 2"
Answer: C
Rationale: IFGC 408.4 requires the sediment trap to be the same pipe size as the gas line serving the
appliance, with a capped nipple extending downward.
7. In Minnesota, a fuel gasfitter performing work on a residential CSST system must:
A) Have a MN 496 Journeyman or Master license
