Maryland Gas Fitter Exam With Actual
Questions & Correct Answers, Plus
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of a gas pressure regulator in a gas
piping system?
A. To increase gas flow to appliances
B. To store excess gas pressure
C. To reduce and maintain consistent downstream pressure
D. To measure gas consumption
Answer: C
Rationale: A gas pressure regulator reduces high incoming gas
pressure to a safe, usable level and maintains a steady
downstream pressure for appliances.
2. Which gas is primarily used in residential natural gas systems?
A. Propane
B. Methane
C. Butane
D. Hydrogen
Answer: B
Rationale: Natural gas is primarily composed of methane, which
is the main fuel delivered to residential systems.
3. What color is typically used to identify gas piping in many
jurisdictions?
, A. Blue
B. Green
C. Yellow
D. Red
Answer: C
Rationale: Yellow is commonly used to identify gas piping for
safety and code compliance.
4. What is the minimum clearance required from a gas vent to an
operable window (general code practice)?
A. 6 inches
B. 12 inches
C. 3 feet
D. 10 feet
Answer: C
Rationale: Most codes require at least 3 feet clearance from
vents to operable openings to prevent gas re-entry.
5. Which tool is used to detect gas leaks most accurately?
A. Voltage tester
B. Manometer
C. Combustible gas detector
D. Hydrometer
Answer: C
Rationale: A combustible gas detector is designed to detect gas
leaks safely and accurately.
6. What is the function of a drip leg in a gas piping system?
A. Increase pressure
B. Collect moisture and debris
C. Reduce gas velocity
D. Filter gas chemically
, Answer: B
Rationale: A drip leg traps moisture and sediment before they
reach appliances.
7. Which fitting is NOT approved for underground gas piping?
A. PE fusion joint
B. Threaded steel
C. Mechanical coupling rated for burial
D. Welded steel
Answer: B
Rationale: Threaded steel joints are generally not permitted
underground due to leakage risk.
8. What is the standard test pressure for low-pressure gas piping
systems (typical code practice)?
A. 1 psi
B. 3 psi
C. 10 psi
D. 50 psi
Answer: B
Rationale: Many codes require a 3 psi air test for low-pressure
systems.
9. What is the purpose of pipe sizing in gas systems?
A. Increase pressure
B. Ensure proper gas flow to appliances
C. Reduce installation cost only
D. Prevent corrosion
Answer: B
Rationale: Proper sizing ensures adequate gas flow and
appliance performance.
Questions & Correct Answers, Plus
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary purpose of a gas pressure regulator in a gas
piping system?
A. To increase gas flow to appliances
B. To store excess gas pressure
C. To reduce and maintain consistent downstream pressure
D. To measure gas consumption
Answer: C
Rationale: A gas pressure regulator reduces high incoming gas
pressure to a safe, usable level and maintains a steady
downstream pressure for appliances.
2. Which gas is primarily used in residential natural gas systems?
A. Propane
B. Methane
C. Butane
D. Hydrogen
Answer: B
Rationale: Natural gas is primarily composed of methane, which
is the main fuel delivered to residential systems.
3. What color is typically used to identify gas piping in many
jurisdictions?
, A. Blue
B. Green
C. Yellow
D. Red
Answer: C
Rationale: Yellow is commonly used to identify gas piping for
safety and code compliance.
4. What is the minimum clearance required from a gas vent to an
operable window (general code practice)?
A. 6 inches
B. 12 inches
C. 3 feet
D. 10 feet
Answer: C
Rationale: Most codes require at least 3 feet clearance from
vents to operable openings to prevent gas re-entry.
5. Which tool is used to detect gas leaks most accurately?
A. Voltage tester
B. Manometer
C. Combustible gas detector
D. Hydrometer
Answer: C
Rationale: A combustible gas detector is designed to detect gas
leaks safely and accurately.
6. What is the function of a drip leg in a gas piping system?
A. Increase pressure
B. Collect moisture and debris
C. Reduce gas velocity
D. Filter gas chemically
, Answer: B
Rationale: A drip leg traps moisture and sediment before they
reach appliances.
7. Which fitting is NOT approved for underground gas piping?
A. PE fusion joint
B. Threaded steel
C. Mechanical coupling rated for burial
D. Welded steel
Answer: B
Rationale: Threaded steel joints are generally not permitted
underground due to leakage risk.
8. What is the standard test pressure for low-pressure gas piping
systems (typical code practice)?
A. 1 psi
B. 3 psi
C. 10 psi
D. 50 psi
Answer: B
Rationale: Many codes require a 3 psi air test for low-pressure
systems.
9. What is the purpose of pipe sizing in gas systems?
A. Increase pressure
B. Ensure proper gas flow to appliances
C. Reduce installation cost only
D. Prevent corrosion
Answer: B
Rationale: Proper sizing ensures adequate gas flow and
appliance performance.
