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Minnesota (MN) 496 Journeyman Fuel Gasfitter
Exam ACTUAL QUESTIONS AND ANSWERS LATEST
UPDATE THIS YEAR
Minnesota (MN) 496 Journeyman Fuel Gasfitter Exam
Based on the official exam content outline, this exam covers Fuel Gas - General Regulations (20%), Fuel
Gas - Venting (15%), Gas Piping (15%), and Plumbing - General Knowledge (12%) . The exam is open
book with a 2.5-hour time limit and requires a 70% passing score .
Question 1
You are installing a natural gas piping system in a new single-family home. The operating pressure will
be 14 inches water column. According to the Minnesota Fuel Gas Code, this is classified as what type of
system?
A) High pressure system
B) Medium pressure system
C) Low pressure system
D) Extra-low pressure system
Answer: C
Rationale: Minnesota Rule 1346.5202 defines low pressure gas piping as a system operating at pressure
not exceeding 14 inches of water column .
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Question 2
A customer calls reporting a faint gas odor in their basement. What is the most appropriate initial
response?
A) Turn on all lights to help locate the leak
B) Open windows, evacuate the area, and call the gas company from outside
C) Attempt to find and repair the leak immediately
D) Ignore it if the smell is faint
Answer: B
Rationale: The correct response is to evacuate and ventilate the area first to prevent fire or explosion
risk, then have the leak inspected by qualified personnel .
Question 3
You are installing a flexible gas connector to a new furnace. What is the maximum allowable length for
this connector according to code?
A) 12 inches
B) 24 inches
C) 36 inches
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D) 48 inches
Answer: B
*Rationale: Flexible connectors for furnaces may not exceed 24 inches and are considered "one-time-
use" items under journeyman code requirements .*
Question 4
A propane water heater requires a device to prevent reverse gas flow into the supply line. Which
component must you install?
A) Pressure regulator
B) Excess flow valve
C) Check valve
D) Relief valve
Answer: C
Rationale: A check valve prevents back-flow of gas into the supply line, which is specifically required on
propane appliances .
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Question 5
What is the primary component of natural gas used for residential fuel applications?
A) Propane
B) Methane
C) Ethane
D) Butane
Answer: B
Rationale: Methane is the main component of natural gas and is primarily used for residential fuel due to
its availability and combustion properties .
Question 6
Complete combustion of natural gas produces which products?
A) Carbon monoxide and water vapor
B) Carbon dioxide and water vapor
C) Methane and oxygen
D) Nitrogen and carbon monoxide
Answer: B
Minnesota (MN) 496 Journeyman Fuel Gasfitter
Exam ACTUAL QUESTIONS AND ANSWERS LATEST
UPDATE THIS YEAR
Minnesota (MN) 496 Journeyman Fuel Gasfitter Exam
Based on the official exam content outline, this exam covers Fuel Gas - General Regulations (20%), Fuel
Gas - Venting (15%), Gas Piping (15%), and Plumbing - General Knowledge (12%) . The exam is open
book with a 2.5-hour time limit and requires a 70% passing score .
Question 1
You are installing a natural gas piping system in a new single-family home. The operating pressure will
be 14 inches water column. According to the Minnesota Fuel Gas Code, this is classified as what type of
system?
A) High pressure system
B) Medium pressure system
C) Low pressure system
D) Extra-low pressure system
Answer: C
Rationale: Minnesota Rule 1346.5202 defines low pressure gas piping as a system operating at pressure
not exceeding 14 inches of water column .
, Page 2 of 145
Question 2
A customer calls reporting a faint gas odor in their basement. What is the most appropriate initial
response?
A) Turn on all lights to help locate the leak
B) Open windows, evacuate the area, and call the gas company from outside
C) Attempt to find and repair the leak immediately
D) Ignore it if the smell is faint
Answer: B
Rationale: The correct response is to evacuate and ventilate the area first to prevent fire or explosion
risk, then have the leak inspected by qualified personnel .
Question 3
You are installing a flexible gas connector to a new furnace. What is the maximum allowable length for
this connector according to code?
A) 12 inches
B) 24 inches
C) 36 inches
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D) 48 inches
Answer: B
*Rationale: Flexible connectors for furnaces may not exceed 24 inches and are considered "one-time-
use" items under journeyman code requirements .*
Question 4
A propane water heater requires a device to prevent reverse gas flow into the supply line. Which
component must you install?
A) Pressure regulator
B) Excess flow valve
C) Check valve
D) Relief valve
Answer: C
Rationale: A check valve prevents back-flow of gas into the supply line, which is specifically required on
propane appliances .
, Page 4 of 145
Question 5
What is the primary component of natural gas used for residential fuel applications?
A) Propane
B) Methane
C) Ethane
D) Butane
Answer: B
Rationale: Methane is the main component of natural gas and is primarily used for residential fuel due to
its availability and combustion properties .
Question 6
Complete combustion of natural gas produces which products?
A) Carbon monoxide and water vapor
B) Carbon dioxide and water vapor
C) Methane and oxygen
D) Nitrogen and carbon monoxide
Answer: B
