G3 EXAM PRACTICE 4 QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Question 1
What is the maximum interval that propane tubing can be run inside a residential
occupancy without identification marking?
Answer: 6 ft (or 1.8 m)
Question 2
What is the correct blade type to use in a chop saw when cutting non-ferrous
metals and plastic piping/tubing?
Answer: Carbide-tipped blade
Question 3
If the cause of appliance sooting is identified as a dirty or rusted burner, what is the
required corrective action?
Answer: Deactivate the appliance and replace or clean the burner.
(Sooting indicates incomplete combustion caused by restricted air-fuel mixing,
creating a dangerous carbon monoxide hazard).
Question 4
How is commercial propane normally shipped, handled, and stored?
Answer: As a liquid under pressure
Question 5
Who publishes the B149 series of Natural Gas and Propane Code books (e.g., CSA
B149.1)?
Answer: CSA (Canadian Standards Association / CSA Group)
How can you identify an approved appliance? -ANSWER ✔✔A recognized
certification mark or TSSA Field approval label will be located on the appliance
What Code requirements apply to an appliance installation that occurred many
years ago? -ANSWER ✔✔The requirements of the most recent published edition
The minimum close nipple size to be used on a propane piping shall be? -
ANSWER ✔✔0" diameter is the maximum (Prohibited practices codebook)
What is the minimum diameter of piping that can be installed underground? -
ANSWER ✔✔1/2" (clause 6.15)
, Where would a technician locate information on specific appliance's service
problems? -ANSWER ✔✔The manufacturers service bulletins
What is the minimum clearance required between the front of a central furnace and
a combustible material? -ANSWER ✔✔24" (Clause 4.14.2)
What type of circuit allows only one possible path for current flow? -ANSWER
✔✔Series
What are the responsibilities of a gas technician if he or she finds a natural gas or
propane appliance that is considered to be immediate hazards? -ANSWER
✔✔Responsibilities are identified in the local act, regulations and bulletins
When is an object considered to be electrically neutral? -ANSWER ✔✔When it
has the same number of electrons and protons
What tool is used to primarily to cut metal, but can also be used for shaping such
things such as sheet metal and straphangers? -ANSWER ✔✔Hacksaw
What is a good response to a customer who is demanding unreasonable or
impossible performance? -ANSWER ✔✔Calmly and patiently identify what you
are able to do only, not what you are unable to do
In general, what is the minimum service clearance surrounding an appliance? -
ANSWER ✔✔24" (Clause 4.14.2)
Power tools should not be operated when standing on what type of surface? -
ANSWER ✔✔
Is new gas piping or tubing required when converting from propane (11 in .w.c) to
natural gas (7 in .w.c)? -ANSWER ✔✔Most likely unless the original propane
system was undersized
What is a multiport burner susceptible to? -ANSWER ✔✔Lint clogging
What is a bimetal flame sensor? -ANSWER ✔✔Two different metals are bonded
together in their flat side which causes them to warp in response to changes in
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Question 1
What is the maximum interval that propane tubing can be run inside a residential
occupancy without identification marking?
Answer: 6 ft (or 1.8 m)
Question 2
What is the correct blade type to use in a chop saw when cutting non-ferrous
metals and plastic piping/tubing?
Answer: Carbide-tipped blade
Question 3
If the cause of appliance sooting is identified as a dirty or rusted burner, what is the
required corrective action?
Answer: Deactivate the appliance and replace or clean the burner.
(Sooting indicates incomplete combustion caused by restricted air-fuel mixing,
creating a dangerous carbon monoxide hazard).
Question 4
How is commercial propane normally shipped, handled, and stored?
Answer: As a liquid under pressure
Question 5
Who publishes the B149 series of Natural Gas and Propane Code books (e.g., CSA
B149.1)?
Answer: CSA (Canadian Standards Association / CSA Group)
How can you identify an approved appliance? -ANSWER ✔✔A recognized
certification mark or TSSA Field approval label will be located on the appliance
What Code requirements apply to an appliance installation that occurred many
years ago? -ANSWER ✔✔The requirements of the most recent published edition
The minimum close nipple size to be used on a propane piping shall be? -
ANSWER ✔✔0" diameter is the maximum (Prohibited practices codebook)
What is the minimum diameter of piping that can be installed underground? -
ANSWER ✔✔1/2" (clause 6.15)
, Where would a technician locate information on specific appliance's service
problems? -ANSWER ✔✔The manufacturers service bulletins
What is the minimum clearance required between the front of a central furnace and
a combustible material? -ANSWER ✔✔24" (Clause 4.14.2)
What type of circuit allows only one possible path for current flow? -ANSWER
✔✔Series
What are the responsibilities of a gas technician if he or she finds a natural gas or
propane appliance that is considered to be immediate hazards? -ANSWER
✔✔Responsibilities are identified in the local act, regulations and bulletins
When is an object considered to be electrically neutral? -ANSWER ✔✔When it
has the same number of electrons and protons
What tool is used to primarily to cut metal, but can also be used for shaping such
things such as sheet metal and straphangers? -ANSWER ✔✔Hacksaw
What is a good response to a customer who is demanding unreasonable or
impossible performance? -ANSWER ✔✔Calmly and patiently identify what you
are able to do only, not what you are unable to do
In general, what is the minimum service clearance surrounding an appliance? -
ANSWER ✔✔24" (Clause 4.14.2)
Power tools should not be operated when standing on what type of surface? -
ANSWER ✔✔
Is new gas piping or tubing required when converting from propane (11 in .w.c) to
natural gas (7 in .w.c)? -ANSWER ✔✔Most likely unless the original propane
system was undersized
What is a multiport burner susceptible to? -ANSWER ✔✔Lint clogging
What is a bimetal flame sensor? -ANSWER ✔✔Two different metals are bonded
together in their flat side which causes them to warp in response to changes in
