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CFESA GAS TECHNICIAN CERTIFICATION EXAM| 250
QUESTIONS AND ANSWERS|GRADED A+
One watt equals ____ Btuh
Electrical potential is measured in: Volts What is a British Thermal Unit (BTU)? the amount of heat necessary to raise the temperature of 1 pound of water to 1 degree Fahrenheit A technician who installs and activates an appliance or replace component shall: Ensure that it complies with the Gas Code, it is in safe working order, and instruct the user in the safe and correct operation of the appliance What is the maximum fine that can be given to an individual found guilty of an offence under the act? $50,
(T/F) Electrical current flows through a capacitor to increase starting torque on a motor True What is the first action when the relief valve on a propane container is leaking? Shutting off the fuel Swing joints and unions shall not be used where piping is: Concealed What is the maximum allowed spacing for supports on NPS 3 horizontal piping? 10' A stationary device used to divert the flow of flue gases is called a: Baffle A long, yellow flame (or luminous/ carbonizing flame) on an atmospheric burner is caused by: Not premixing air and fuel prior to combustion Transformers which produce a secondary voltage that is higher than the primary are called: Step up transformers
Coated copper tubing or corrugated stainless-steel tubing employed on a 2 psi supply of 150 feet shall be pressure tested to: 15 psig for 15 minutes On a recreational vehicle, all branch connections off the main gas supply line shall be made: Outside the vehicle Given a constant supply voltage, if resistance increases in a simple circuit, current will: Decrease (T/F) Carbon Monoxide is toxic True The ohmmeter reading across a good fuse that is removed from the circuit, will be: 0 Materials that do not easily conduct electricity are called: Insulators The relative density of liquid propane as compared to water is approximately:
One imperial gallon of propane weighs: 5.1 pounds (2.3 kilograms) What are connected to a grounding rod in a properly installed electrical installation? Neutral and Ground wire + the Electrical panel Electrical wires shall be supported: Every 5 feet and within 1 foot of a junction box or turn in direction What is the normal natural gas building line pressure for a single-family residence? 7" water column Two undesirable products of incomplete combustion are: Carbon monoxide and aldehydes
Pressure regulator A device used to control and maintain a uniform outlet pressure. Pressure gauge An instrument used to measure the pressure of gases or liquids. Pressure relief valve A safety device that automatically releases pressure to prevent system failure. Tamper switch A device that detects unauthorized access or tampering with equipment. TSSA Fuel Safety inspector order An order issued by a TSSA inspector under the Technical Standards and Safety Act. Csa Z662 Pipeline Systems Code A code that applies to all appliance and piping installations downstream of the natural gas meter.
CSA B149.1 Natural Gas and Propane Installation Code A standard for the installation of natural gas and propane systems. National Building Code of Canada A model code that provides minimum requirements for building construction in Canada. Ontario Electrical Safety Code A code that governs electrical installations in Ontario. Damper A plate or valve for regulating the flow of air or flue gas. B149.1 Gas Code A code that outlines the requirements for gas appliances and installations. Maximum propane supply pressure in a central mechanical room
Who is permitted to weld gas piping? A welder certified by TSSA's Boiler and Pressure Vessels Division who is using an approved welding method. Properties of carbon monoxide gas Colourless, Odourless, Tasteless, and Combustible. What is the btu/h output of an electric heater rated at 20 kW? 68,240 BTUs. One horsepower of mechanical power is equal to how many watts? 746 watts. What action to take after a fire or carbon monoxide incident? Make it safe, then contact TSSA and do not disturb the incident scene until it is released by a TSSA inspector. What is a 'care and detention building'? A type of building used for the care and detention of individuals.
Appeal to the Provincial Divisional Court for a final ruling A legal process to seek a final decision from a higher court. Annex H of the B149.1 Code A specific section of the B149.1 Code that outlines regulations. Technical Standards and Safety Authority (TSSA) An organization responsible for public safety in technical standards. Building occupied by persons requiring special care A facility for individuals with cognitive or physical limitations, secured from self- harm. How many inches of water column equal one psig pressure? 28" Ohm's law states:
For residential piping systems not equipped with a readily accessible open burner on an approved appliance with an input of 400,000 Btuh or less, purging of air from the piping system shall be conducted in accordance with: Annex H of the B149.1 Code. (T/F) A voltage drop never occurs across a switch False What qualifications are required for a person welding gas piping? Registered under the Boiler and Pressure Vessel Act regulations. The boiling point of propane is:
- 44 F If there are more turns of wire on the primary windings of a transformer than on the secondary, the transformer is called a: Step-down transformer.
What is the maximum allowed distance between piping supports for NPS 2 piping run horizontally? 10' (T/F) Less than one ampere of electricity can kill a person True What does the acronym TSSA stand for? Technical Standards and Safety Authority. What is the proper test pressure and duration for a gas piping system with 150' longest measured run with a system supply pressure of 7" water column? 10 psi for 10 minutes. How often is it required to mark gas pipe or tubing piping (in feet)? Shall be painted yellow, every 1" and marked Gas or Propane and intervals shall not exceed 20".
Which of the following Codes is a G3 required to comply with when working on gas-fired installations? B149 Series of the Gas Code, Ontario Electrical Code, and Ontario Building Code. What is the maximum length allowed for portable appliances? 30' The maximum pressure drop allowed by the codes for a natural gas piping with a supply pressure of 7" water column is: 0.5 in. w.c. Convert 3.5" water column into psig 1/4 or 0.25 psig. Electrical current is measured in: Amps. What is the normal propane gas building line pressure for a single-family residence?
11" to 14" water column. Requirements on cylinders are from: Transport Canada. Chemical formula for Carbon Monoxide: CO. Certified manufacturer's instructions for an appliance or component are: Legal requirements that shall be followed. Can rubber gaskets be used in gas piping flanges? No. What is the most common cause of orange flashes in a flame? Dust or dirt.
Line Connection Terminals on a 120-volt Receptacle 4" long and 2" diameter DA Certification Holder Equipment Installation Limit 250,000 Btuh Maximum Length of Flexible Connector 2' Equivalent Resistance of Two 20 W Resistors in Parallel 10 W Responsibility for Pressure Testing Piping System The installer Category IV Appliance An appliance that operates with a positive vent static pressure and an appliance efficiency of over 83%
Best Way to Locate a Propane Leak Use an approved leak detection solution to perform a soap test Flue Gases from Complete Combustion of Natural Gas Carbon dioxide, water vapour, nitrogen, excess air, heat and light Requirements on Tanks Fuel Industry Certificates Regulation 215/ Class of Fire Extinguisher for Electrical Fire Class C Natural Gas Density Compared to Air lighter than air Gas Hose Connection to Building Piping
