TSSA Practice UPDATED ACTUAL Exam
Questions and CORRECT Answers
What would be the max flame failure response time for a standing pilot - CORRECT
ANSWER - 1 min and 30 seconds
What does MSDS stand for? - CORRECT ANSWER - Material Safety Data Sheet
for basic self protection what do you need? - CORRECT ANSWER - A) safety glasses
B) safety shoes/boots
C) gloves
D) all of the above
A ladder must extend above the roof landing by? - CORRECT ANSWER - 36"
What are the approximate limits of flammability for natural gas ? - CORRECT
ANSWER - 4%-15%
What is the ignition temp of natural gas? - CORRECT ANSWER - 1300 F
What is the flame temp of natural gas? - CORRECT ANSWER - 1000 F
What is the air to gas ratio for perfect combustion of propane gas - CORRECT
ANSWER - 23.5 to 1
What is the expansion rate of propane gas - CORRECT ANSWER - 1:270
What is the heating value of natural gas per cubic foot in Canada - CORRECT ANSWER -
1000 BTU
,Who is the most common testing agency that certifies venting? - CORRECT ANSWER -
ULC
What is the relief valve pressure setting for a propane tank - CORRECT ANSWER - 250
psig
Who issues gas technician certificates in Ontario - CORRECT ANSWER - Technical
standards and safety authority
What is the flammability range of CO? - CORRECT ANSWER - 12% to 74%
What are the products of complete combustion - CORRECT ANSWER - Carbon dioxide,
water vapour, heat
What is needed to start combustion of a fuel - CORRECT ANSWER - Ignition, fuel, air
What is the air needed to operate a natural draft gas appliance safely? - CORRECT
ANSWER - Combustion air, dilution air
What is the boiling point of natural gas - CORRECT ANSWER - -260°F
What is the relative density of propane gas - CORRECT ANSWER - 1.52
What is air comprised of? - CORRECT ANSWER - 80% nitrogen and 20% oxygen
What are the products of incomplete combustion - CORRECT ANSWER - Soot,
aldehydes, carbon monoxide, heat
, What type of air is premixed with gas prior to ignition - CORRECT ANSWER - Primary
air
What type of air surrounds the flame for proper combustion - CORRECT ANSWER -
Secondary air
Dilution air is - CORRECT ANSWER - Air to neutralize chimney draft
How many types of fire extinguishers exist - CORRECT ANSWER -4
What is the weight of one imperial gallon of propane - CORRECT ANSWER -
What is the relief valve pressure set on a propane cylinder - CORRECT ANSWER - 250
psig
What is the approximate filling density of propane containers - CORRECT ANSWER -
80%
At 120 volts and a editable of 25 ohms what would be the amperage - CORRECT
ANSWER - 4.8
A reading of OL on a digital multi meter would indicate what - CORRECT ANSWER -
Open circuit
What is the chemical formula for natural gas - CORRECT ANSWER - CH4
When it has been determined that the voltage to a unit is approximately 115 volts which range
should a digital volt meter be set to read at - CORRECT ANSWER - 0-250 volts
Questions and CORRECT Answers
What would be the max flame failure response time for a standing pilot - CORRECT
ANSWER - 1 min and 30 seconds
What does MSDS stand for? - CORRECT ANSWER - Material Safety Data Sheet
for basic self protection what do you need? - CORRECT ANSWER - A) safety glasses
B) safety shoes/boots
C) gloves
D) all of the above
A ladder must extend above the roof landing by? - CORRECT ANSWER - 36"
What are the approximate limits of flammability for natural gas ? - CORRECT
ANSWER - 4%-15%
What is the ignition temp of natural gas? - CORRECT ANSWER - 1300 F
What is the flame temp of natural gas? - CORRECT ANSWER - 1000 F
What is the air to gas ratio for perfect combustion of propane gas - CORRECT
ANSWER - 23.5 to 1
What is the expansion rate of propane gas - CORRECT ANSWER - 1:270
What is the heating value of natural gas per cubic foot in Canada - CORRECT ANSWER -
1000 BTU
,Who is the most common testing agency that certifies venting? - CORRECT ANSWER -
ULC
What is the relief valve pressure setting for a propane tank - CORRECT ANSWER - 250
psig
Who issues gas technician certificates in Ontario - CORRECT ANSWER - Technical
standards and safety authority
What is the flammability range of CO? - CORRECT ANSWER - 12% to 74%
What are the products of complete combustion - CORRECT ANSWER - Carbon dioxide,
water vapour, heat
What is needed to start combustion of a fuel - CORRECT ANSWER - Ignition, fuel, air
What is the air needed to operate a natural draft gas appliance safely? - CORRECT
ANSWER - Combustion air, dilution air
What is the boiling point of natural gas - CORRECT ANSWER - -260°F
What is the relative density of propane gas - CORRECT ANSWER - 1.52
What is air comprised of? - CORRECT ANSWER - 80% nitrogen and 20% oxygen
What are the products of incomplete combustion - CORRECT ANSWER - Soot,
aldehydes, carbon monoxide, heat
, What type of air is premixed with gas prior to ignition - CORRECT ANSWER - Primary
air
What type of air surrounds the flame for proper combustion - CORRECT ANSWER -
Secondary air
Dilution air is - CORRECT ANSWER - Air to neutralize chimney draft
How many types of fire extinguishers exist - CORRECT ANSWER -4
What is the weight of one imperial gallon of propane - CORRECT ANSWER -
What is the relief valve pressure set on a propane cylinder - CORRECT ANSWER - 250
psig
What is the approximate filling density of propane containers - CORRECT ANSWER -
80%
At 120 volts and a editable of 25 ohms what would be the amperage - CORRECT
ANSWER - 4.8
A reading of OL on a digital multi meter would indicate what - CORRECT ANSWER -
Open circuit
What is the chemical formula for natural gas - CORRECT ANSWER - CH4
When it has been determined that the voltage to a unit is approximately 115 volts which range
should a digital volt meter be set to read at - CORRECT ANSWER - 0-250 volts
