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G-3 92 Exam Revision Quiz
Questions
The heat content of 1 cubic foot of Natural Gas is approximately: - โ โ 1,000 Btu
In cases of a threat to public safety, a Director may make orders: - โ โ Related to matters that have not been provided in the Act
Propane cylinders used in Ontario must be manufactured and approved to the requirements established by: - โ โ Transport Canada
When the installation of an appliance constitutes a conversion from another form of energy to gas, the installer must: - โ โ Advise the user in writing of the follow in discontinuing the supply of the former form of energy
Potential is measured in: - โ โ Volts
The total current in a parallel circuit (I.e. taken at source) will be: - โ โ The sum of the current passing through each branch circuit
The the absence of a readily accessible burner, an appliance not equipped with a continuous pilot shall be purged in accordance with: - โ โ AnnexH of the B 149. 1-05 code
The actual pressure drop in a gas line is measured by subtracting the: - โ โ Working pressure at the appliance from the working pressure at the gas meter
If the return and supply air plenum are both located on the top of the furnace, the furnace is a: - โ โ Low Boy
Conduction is: - โ โ The transfer of heat from Particle to Particle
The configuration of a "HI BOY" forced air gas furnace has: - โ โ The supply air exiting at the top and return air entering at the bottom
What type of venting does a Surface Combustion Infrared heater requires: - โ โ No Vent
A yellow flame at an atmospheric burner could be the result of: - โ โ Insufficient primary air
The term "Symptom" is used in manufacturer's literature to describe: - โ โ Abnormal operation of the equipment
Venting and Air Supply requirements are under section: - โ โ 8
Equipment wiring diagrams indicate which of the following: - โ โ Supply Voltage, Internal Wiring, Location of Controls, Field Wiring
All furnace appliance manufacturer's literature give the name of the manufacturer, the : - โ โ Btuh input, fan size, CFM, voltage, fuse size, and the physical dimensions
Gas piping requirements fall under which section: - โ โ 6
On a roof with a 10/12 pitch and a wall 4 feet high and 6 feet away from the vent opening, what is the minimum vent height for a category one propane fired appliance: - โ โ 6ft
The B149.1 Code is used to determine: - โ โ The requirements for installing gas appliances
What takes place at the Heat Exchanger in a Forced Air Furnace: - โ โ Return Air is heated
A Draft Hood will: - โ โ Prevent a down draft from entering the appliance
Air passing over a heat exchanger is heated by: - โ โ Convection
Most under fired storage Water Heater temperature controls utilize: - โ โ Rod and Tube Sensors
A yellow flame at an Atmospheric Burner could be the result of: - โ โ Insufficient Primary Air
The purpose of the High Limit Switch found on many gas fired appliances is to: - โ โ Shut off the main gas valve should overheating occur
A Noisy, lifting, blowing pilot flame is usually the result of: - โ โ Excessive gas to the main burner
A residential central forced air gas furnace heating system works n the principle of drawing: - โ โ Conditioned air from a central area of the house then forcing it across a heat exchanger and returning back into the house through supply air ducts
Which method of heat transfer is used in a standard gas-fired over: - โ โ Convection
If upon reactivation of an appliance a G-3 technician notices flame roll- out, the technician is required to: - โ โ Turn off the Gas Supply and notify the Supervising Certificate Holder to repair the problem
The configuration of a "Hi-Boy" forced air furnace is: - โ โ Supply air entering at the top and return air exiting at the bottom
Convection is: - โ โ The transfer of heat by the movement of fluids
Infra-red Heaters may not be used in: - โ โ Occupied residences
Which method of Heat Transfer is used in a Clothes Dryer: - โ โ Convection
If the gas/air velocity is too great at the port of an Atmospheric Burner, the flame with have a tendency to: - โ โ Lift of the port
Infra-red tube heaters transfer heat by: - โ โ Radiation
Atmospheric Burners are designed to operate under: - โ โ Normal atmospheric pressure with low gas pressure
What would the likely cause be if orange flashes were evident in a gas flame: - โ โ Dust burning in the flame
An orifice for propane appliance with the same input as a natural gas appliance is: - โ โ Smaller than the natural gas orifice
Lead Shields are generally used to anchor fasteners into: - โ โ Concrete
1 imperial gallon of Propane weighs: - โ โ 5.1 pounds
The boiling point of Propane at atmospheric pressure is: - โ โ - 44*F
The specific Gravity of Propane is: - โ โ 1.
Which type of pilot burns at low turn-down throughout the entire time the burner is in service, whether or no the main burner is firing, except that upon a call for heat, the fuel flow to the pilot is automatically increased to produce a flame which will reliably ignite the main burner fuel? - โ โ An Expanding Pilot
What is the Category 3 Appliance: - โ โ An appliance that operates with a positive vent static pressure and a flue loss of not less than 17%
What is the Category 2 Appliance: - โ โ An appliance that operates with a non-positive vent static pressure and a flue loss of less than 17%
As the current increases in a conductor the magnetic field around the conductor: - โ โ Increases
Which of the following statements concerning a series electrical circuit is correct? - โ โ If one load opens in a series circuit then all loads will stop operating
Which meter is used to check for continuity? - โ โ Ohm Meter
In a parallel circuit containing a 3-ohm, a 7-ohm and a 10-ohm resistor, the current flow is: - โ โ Highest through the 3-ohm resistor
If a scale on a mechanical drawing is 1/8" - 1'0" then a line measuring 4" in length is actually - โ โ 32 feet
A mechanical drawing is used to: - โ โ Give the building address, show the equipment location, piping layout duct sizing and duct layout
To correct a symptom such as a fluctuating flame, a technician should first: - โ โ Consult the manufacturer's instructions
Gasket material used in a gas system shall be: - โ โ Neoprene
A load measures 120 volts across it but the load does not work. What is your diagnosis? - โ โ Faulty Motor
What is the formula for finding the resistance in a an electrical circuit? - โ โ R = E/I
Why is the manifold pressure important when setting up an appliance being converted from one fuel to another? - โ โ Gas / Air ratio will not be correct for proper combustion
A luminous flame will occur if there is a) too much or b) too little - fuel in ratio to air? - โ โ b) Too little fuel in ratio to air (will cause a luminous flame)
A/n ______________ controls the gas input to the burner. - โ โ An Orifice
A boiler shall conform to the requirements of? - โ โ The Boiler & Pressure Vessel Act
Recessed wall heaters use Type _______ vent. - โ โ Type BW vent
Name the appliance that commonly uses a Rod and Tube type control. - โ โ Water Heater
Can an Infrared heater be installed in a School? - โ โ Yes
Can a construction heater be installed in an occupied dwelling unit? Reference? - โ โ No - 7.18.
What unit of electricity remains the same in a series circuit? - โ โ Ampheres/Current
