Nova Scotia Gasfitter Certification Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. Which type of gas is commonly used in residential natural gas
systems in Nova Scotia?
a) Propane
b) Butane
c) Natural gas (methane)
d) Hydrogen
Residential systems in Nova Scotia typically use natural gas, which is
primarily methane.
2. What is the primary purpose of a gas regulator in a gas system?
a) To filter impurities
b) To ignite the gas
c) To maintain proper pressure
d) To prevent leaks
A gas regulator reduces the supply pressure to a safe and consistent
level for appliances.
3. Which standard must all gas piping installations in Nova Scotia
comply with?
a) ASME B31.3
b) ISO 9001
c) CSA B149.1
,d) NFPA 70
CSA B149.1 sets the code for natural gas and propane installations in
Canada, including Nova Scotia.
4. What is the maximum allowable pressure for low-pressure
residential natural gas systems?
a) 1 kPa
b) 5 kPa
c) 2.75 kPa
d) 10 kPa
Residential systems are designed to operate at approximately 2.75 kPa
to ensure safety.
5. When installing a gas appliance, what is required before turning on
the gas?
a) Checking electrical connections
b) Painting the appliance
c) Pressure testing the system for leaks
d) Venting the appliance outdoors
All gas systems must be pressure tested for leaks before the appliance is
used.
6. What is the recommended method for detecting a gas leak in a
piping system?
a) Smelling for gas only
b) Using a flame
c) Soap solution or electronic gas detector
d) Tapping the pipe
Soap solution or a gas detector is safe and effective for leak detection;
flames are dangerous.
, 7. Which of the following materials is commonly used for
underground gas piping?
a) PVC
b) Polyethylene (PE)
c) Aluminum
d) Copper
Polyethylene is flexible, corrosion-resistant, and approved for buried gas
lines.
8. What is the purpose of a venting system for gas appliances?
a) To heat the room
b) To safely remove combustion products
c) To regulate gas pressure
d) To filter gas
Venting ensures carbon monoxide and other combustion gases are
expelled safely.
9. Which safety device shuts off gas flow in case of a flame failure?
a) Gas meter
b) Regulator
c) Flame safeguard/thermocouple
d) Pressure gauge
A thermocouple senses the flame and shuts off gas if the flame goes
out.
10. What is the minimum distance required between a gas vent
termination and a window or door?
a) 100 mm
b) 300 mm
c) 600 mm
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which type of gas is commonly used in residential natural gas
systems in Nova Scotia?
a) Propane
b) Butane
c) Natural gas (methane)
d) Hydrogen
Residential systems in Nova Scotia typically use natural gas, which is
primarily methane.
2. What is the primary purpose of a gas regulator in a gas system?
a) To filter impurities
b) To ignite the gas
c) To maintain proper pressure
d) To prevent leaks
A gas regulator reduces the supply pressure to a safe and consistent
level for appliances.
3. Which standard must all gas piping installations in Nova Scotia
comply with?
a) ASME B31.3
b) ISO 9001
c) CSA B149.1
,d) NFPA 70
CSA B149.1 sets the code for natural gas and propane installations in
Canada, including Nova Scotia.
4. What is the maximum allowable pressure for low-pressure
residential natural gas systems?
a) 1 kPa
b) 5 kPa
c) 2.75 kPa
d) 10 kPa
Residential systems are designed to operate at approximately 2.75 kPa
to ensure safety.
5. When installing a gas appliance, what is required before turning on
the gas?
a) Checking electrical connections
b) Painting the appliance
c) Pressure testing the system for leaks
d) Venting the appliance outdoors
All gas systems must be pressure tested for leaks before the appliance is
used.
6. What is the recommended method for detecting a gas leak in a
piping system?
a) Smelling for gas only
b) Using a flame
c) Soap solution or electronic gas detector
d) Tapping the pipe
Soap solution or a gas detector is safe and effective for leak detection;
flames are dangerous.
, 7. Which of the following materials is commonly used for
underground gas piping?
a) PVC
b) Polyethylene (PE)
c) Aluminum
d) Copper
Polyethylene is flexible, corrosion-resistant, and approved for buried gas
lines.
8. What is the purpose of a venting system for gas appliances?
a) To heat the room
b) To safely remove combustion products
c) To regulate gas pressure
d) To filter gas
Venting ensures carbon monoxide and other combustion gases are
expelled safely.
9. Which safety device shuts off gas flow in case of a flame failure?
a) Gas meter
b) Regulator
c) Flame safeguard/thermocouple
d) Pressure gauge
A thermocouple senses the flame and shuts off gas if the flame goes
out.
10. What is the minimum distance required between a gas vent
termination and a window or door?
a) 100 mm
b) 300 mm
c) 600 mm
