G3 exam prep Questions and Solutions
the tube inside a hot water tank that helps to prevent corrosion of the tank is called a:
a) dip tube
b) draft hood
c) anode
d) baffle - -c) anode
-fall protection must be worn when a worker is exposed to a fall of more than: - -10 feet
-MSDS stands for: - -Material Safety Data Sheet
-a circuit that has infinite resistance is a ________ circuit: - -open
-when there is a path for electric current to take between two points being tested, it is
called: - -continuity
-the three components necessary to have an electrical circuit are: - -power source, path,
load
-what is the largest diameter of pipe for natural gas and propane that may be threaded? - -
2-1/2 inch (6.9.2)
-how often should 1 inch horizontal pipe be supported? - -every 8 feet (table 6.2)
-what is the maximum allowable natural gas pressure inside an industrial building? - -66
psig (table 5.1 pg. 54)
-Gasket materials used in gas pipe system shall be made of: - -neoprene or similar material
only (pg. 73)
-a leak test is performed: - -immediately after turning on the gas with a dial test of a
correct size pressure gauge for 10 minutes
-can underground piping or tubing pass below a foundation? - -no
-to support horizontal piping, you would use a : - -clevis hanger
-an instrument used to measure pressures in inches of water column is called a: - -
manometer
-a die head is used to: - -make external threads
-a tap is used to: - -make internal threads
, -flare nuts must be: - -brass
-a record of training (ROT) is valid for - -3 years (reg 215)
-a refillable propane cylinder shall be manufactured, tested and inspected and marked in
accordance with the requirements of CAN/CSA-B339 and: - -the transport of dangerous
goods regulation of transport Canada (pg. 52 149.2)
-a gas tech must issue a written notice when: - -they find an unacceptable condition that is
not an immediate hazard and if they find an unacceptable condition that is an immediate
hazard (reg 212)
-to what code is a masonry chimney constructed? - -local building code or national
building code standards
-can a construction heater be utilized as temporary heat in an inhabited dwelling unit or
building - -no (pg 102)
-how often must a gas fitter renew their certificate? - -every second year on their birth
date
-chemical formula for natural gas: - -CH4
-chemical formula for propane: - -C3H8
-how many cubic feet of air does it take to burn one cubic foot of propane gas? - -23.5
-how many cubic feet of air does it take to burn one cubic foot of natural gas? - -10
-what is the main purpose of having excess air with the combustion air requirements? - -to
promote a sharp blue bunsen flame on the main burner
-to raise efficiency of an appliance you would: - -increase amount of excess air
-state the products of incomplete combustion: - -CO,CO2,H2O,heat
-state the products of complete combustion: - -H20, CO2, heat
-a yellow flame off an appliance burner is called a: - -luminous flame
-what is caused by not premixing air and fuel prior to combustion? - -luminous flame
-what is a "dry gas"? - -gas that has all or most of the heavier hydrocarbons removed
-natural gas is transported/transmitted in Canada mainly by: - -the TransCanada Pipeline
the tube inside a hot water tank that helps to prevent corrosion of the tank is called a:
a) dip tube
b) draft hood
c) anode
d) baffle - -c) anode
-fall protection must be worn when a worker is exposed to a fall of more than: - -10 feet
-MSDS stands for: - -Material Safety Data Sheet
-a circuit that has infinite resistance is a ________ circuit: - -open
-when there is a path for electric current to take between two points being tested, it is
called: - -continuity
-the three components necessary to have an electrical circuit are: - -power source, path,
load
-what is the largest diameter of pipe for natural gas and propane that may be threaded? - -
2-1/2 inch (6.9.2)
-how often should 1 inch horizontal pipe be supported? - -every 8 feet (table 6.2)
-what is the maximum allowable natural gas pressure inside an industrial building? - -66
psig (table 5.1 pg. 54)
-Gasket materials used in gas pipe system shall be made of: - -neoprene or similar material
only (pg. 73)
-a leak test is performed: - -immediately after turning on the gas with a dial test of a
correct size pressure gauge for 10 minutes
-can underground piping or tubing pass below a foundation? - -no
-to support horizontal piping, you would use a : - -clevis hanger
-an instrument used to measure pressures in inches of water column is called a: - -
manometer
-a die head is used to: - -make external threads
-a tap is used to: - -make internal threads
, -flare nuts must be: - -brass
-a record of training (ROT) is valid for - -3 years (reg 215)
-a refillable propane cylinder shall be manufactured, tested and inspected and marked in
accordance with the requirements of CAN/CSA-B339 and: - -the transport of dangerous
goods regulation of transport Canada (pg. 52 149.2)
-a gas tech must issue a written notice when: - -they find an unacceptable condition that is
not an immediate hazard and if they find an unacceptable condition that is an immediate
hazard (reg 212)
-to what code is a masonry chimney constructed? - -local building code or national
building code standards
-can a construction heater be utilized as temporary heat in an inhabited dwelling unit or
building - -no (pg 102)
-how often must a gas fitter renew their certificate? - -every second year on their birth
date
-chemical formula for natural gas: - -CH4
-chemical formula for propane: - -C3H8
-how many cubic feet of air does it take to burn one cubic foot of propane gas? - -23.5
-how many cubic feet of air does it take to burn one cubic foot of natural gas? - -10
-what is the main purpose of having excess air with the combustion air requirements? - -to
promote a sharp blue bunsen flame on the main burner
-to raise efficiency of an appliance you would: - -increase amount of excess air
-state the products of incomplete combustion: - -CO,CO2,H2O,heat
-state the products of complete combustion: - -H20, CO2, heat
-a yellow flame off an appliance burner is called a: - -luminous flame
-what is caused by not premixing air and fuel prior to combustion? - -luminous flame
-what is a "dry gas"? - -gas that has all or most of the heavier hydrocarbons removed
-natural gas is transported/transmitted in Canada mainly by: - -the TransCanada Pipeline
