Gas Technician Certification Practice Exam

These questions are part of the practice quiz. Start practicing

• What type of building is designed for direct trade or service to the public?
• In gas systems, which type of pipe allows for greater flexibility in installations?
• What do certified manufacturer's instructions for an appliance or component represent?
• What is the primary concern when handling gas piping systems?
• What is the minimum size for a dirt pocket drop in a gas piping system?
• Which of the following is a critical safety procedure when testing low pressure gas lines?
• What does 'excess air' refer to in a combustion process?
• What type of transformer increases voltage from the primary to the secondary side?
• How should manual shut-off valves be installed to ensure accessibility?
• What is the chemical formula for water?
• In a gas leak situation, what is the easiest and most immediate action to take?
• What does it indicate when the 0.1 m³ dial moves during a dial test?
• What maintenance practice is essential for ensuring safe operation of low pressure gas lines?
• When checking an electrical circuit with an ohmmeter, what does a reading of 'OL' or '∞' indicate?
• How is the propane gas vapor typically managed when it escapes a container?
• What is the minimum clearance requirement for rooftop gas-fired appliances?
• What is the consequence of using a street elbow in a gas piping system?
• What are the components of flue gases produced from the complete combustion of natural gas?
• How many inches of water column are equivalent to one psig pressure?
• What does NPS stand for in piping specifications?
• Is a quick disconnect the same as a manual shut-off valve?
• What must piping joint tape be in gas installations?
• For residential piping systems that lack 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 what?
• What is required for an ohmmeter connection?
• What does Ohm's law state?
• In a properly installed electrical installation, what is connected to a grounding rod?
• Which of the following is a reason for obtaining a variance before appliance installation?
• What is the chemical formula for methane?
• Which of the following is a common safety concern when working with gas appliances?
• What are materials that do not easily conduct electricity called?
• What is a branch electrical circuit used for?
• What are some common symptoms of carbon monoxide poisoning?
• What is the air to gas ratio necessary for complete combustion of natural gas?
• How many BTUs are equivalent to 1 kilowatt-hour?
• When natural gas is in a gaseous state, what is it primarily composed of?
• In a parallel circuit, what is true about the total current?
• Before activating a propane appliance connected to a piping system, what is required if the homeowner meets certification exemption requirements?
• What does a drop in pressure indicate during testing of low pressure gas lines?
• Upon which principle does the complete combustion of gas rely?
• What are the necessary conditions for electricity to flow?
• Is it true that a junction box connector must be approved for both the box and wire type?
• What is the role of nitrogen in the combustion zone?
• Which code applies to the installation of all appliances downstream of the natural gas meter?
• What parameter is critical for achieving efficient combustion of gas fuels?
• Which factor is critical to ensure public safety in technical standards?
• What should be done if a leak is detected during low pressure gas line testing?
• What is the critical requirement for the installation of gas appliances in residential settings?
• What is the chemical formula for carbon dioxide?
• What is the role of a TSSA inspector after an incident?
• What is the chemical formula for Carbon Monoxide?
• What does 'back emf' refer to in electrical terms?
• What can cause the release of pressure in a pressure relief valve?
• What is the best method for locating a propane leak?
• How may the TSSA director serve a Notice of Proposal?
• When should the pressure in a low pressure gas line be checked?
• Which characteristic does carbon monoxide NOT possess?
• What action can a certificate holder take if they disagree with the Director's ruling after an appeal and hearing?
• Is the statement true or false: Electrical current will flow in transformers?
• What is an identifying feature of a step-up transformer?
• What is the primary role of the CSA regarding gas and oil codes?
• If resistance increases in a simple electrical circuit with a constant supply voltage, what happens to the current?
• What is the maximum propane pressure allowed in an industrial building?
• What is the standard pressure for a natural gas line in residential applications?
• What should be the first action when the relief valve on a propane container is leaking?
• What is the maximum flame temperature achievable from natural gas combustion?
• How does the density of natural gas compare to air?
• What is the boiling point of propane?
• In a parallel circuit, the amperage reading at any point will be:
• What happens to the electrical resistance when two resistors are connected in series?
• What materials can gas piping or tubing be made of?
• What is the purpose of a step-up transformer?
• Which of the following describes the purpose of using an in-line ammeter?
• What is the weight of one imperial gallon of propane?
• How do you convert 3.5" water column into psig?
• What is a British Thermal Unit (BTU)?
• Can rubber gaskets be used in gas piping flanges?
• If there are more turns of wire on the primary windings of a transformer than on the secondary, what type of transformer is it called?
• How is electrical current measured?
• What is the maximum pressure drop allowed by codes for a natural gas piping system with a supply pressure of 5 psi?
• What happens to amperage when resistance is decreased in a parallel circuit?
• What do B149.1 and B149.2 installation codes cover?
• What is the significance of supporting rooftop gas piping at every threaded joint?
• Where should swing joints and unions not be used?
• What is the boiling point of natural gas?
• True or False: Less than one ampere of electricity can kill a person.
• What is the maximum pressure drop allowed by codes for natural gas piping with a supply pressure of 7" water column?
• What is one major consequence of not properly testing low pressure gas lines?
• To what percentage is a propane container typically filled?
• What is the purpose of the National Building Code of Canada?
• What is the primary purpose of identifying gas piping or tubing in a building?
• What is the notification time period for TSSA-related matters?
• Which of the following is NOT a component of flue gases from natural gas combustion?
• Can bushings be used on gas piping?
• If the primary winding of a transformer has an applied voltage of 120V and a current of 1 amp, what is the maximum current available on the 30V secondary side of the transformer?
• What is the maximum burial depth requirement under a commercial driveway?
• Which products result from the perfect combustion of natural gas or propane?
• Which organization sets the requirements for gas cylinders?
• What is the most common cause of orange flashes in a flame?
• What is the maximum fine for an individual found guilty of an offence under the act?
• What is the first action to take if a co-worker is suffering a shock from an electrical circuit and cannot let go of the circuit?
• What is the minimum service clearance an appliance shall be installed with?
• When in a series circuit, how is overall resistance calculated?
• What document outlines the qualifications required to become a Gas Technician 1?
• The current through each branch circuit in a parallel circuit primarily depends on what factor?
• In a parallel circuit with a 10 W, a 20 W, and a 30 W resistor, where does the highest current flow occur?
• How can the continuity of electrical circuits be effectively checked?
• Which gas is commonly used in residential heating applications?
• What is the proper test pressure and duration for a gas piping system with a 150' longest measured run with a system supply pressure of 7" water column?
• What happens when the length of a gas hose exceeds the maximum allowed length?
• What is the total resistance of a series circuit that consists of two 10 ohm loads?
• What is the relative density of propane compared to air?
• True or False: An in-line ammeter must be connected as part of the circuit with the load.
• What is the normal natural gas building line pressure for a single-family residence?
• What is the requirement for piping joint tape in gas installations?
• What effect does negative pressure have on appliance venting?
• Which code governs electrical installations specifically in Ontario?
• How is a Category 1 Appliance defined?
• What materials are needed for a successful gas hose connection to building piping?
• What classification do carbon dioxide and nitrogen fall under?
• Which government bodies are responsible for transportation policies and regulations?
• What does CSA-B149.1 Code specifically address?
• How many cubic feet of gas does a pound of propane produce at 60°F?
• Which component is crucial for ensuring the safe operation of gas-burning appliances?
• What is the maximum output of equipment installation permitted for a DA certification holder?
• Which gas is primarily associated with combustion and energy release in gas appliances?
• What class of fire extinguisher is appropriate for electrical fires?
• What is a gas technician required to do if a rooftop appliance is found to be in an unacceptable condition?
• What defines the specific gravity of a gas?
• What is the significance of the maximum operating pressure in a fuel system?
• What is the minimum dimension of a gas line needed for safe installation?
• What regulation governs the requirements for tanks in the fuel industry?
• What is primarily measured by the unit of inches of water column?
• What is the relative density of natural gas compared to air?
• What is the maximum length for a pipe that requires purging with inert gas?
• What must be confirmed before the installation of a gas appliance?
• What is the maximum length allowed for a flexible connector?
• One watt is equivalent to how many British thermal units per hour (Btuh)?
• What does the acronym TSSA stand for?
• What is required to make an outlet gas tight when not connected?
• Which type of copper tubing does not require a protective coating when installed underground?
• What type of circuit is used for a 24V load?
• Which of the following is required for marking gas pipes?
• What is the primary focus of the CSA Z662 Pipeline Systems Code?
• What must an installer advise the appliance user during the conversion from oil to gas?
• What defines a commercial building?
• Which component should be consulted to find out the specific purpose of an appliance?
• What is one of the functions of exhaust venting systems according to installation codes?
• What pressure should coated copper tubing or corrugated stainless-steel tubing be tested to on a 2 psi supply of 150 feet?
• What is the minimum test duration for gas piping systems up to 200 feet at 10 psig?
• How does the amperage behave in a series circuit?
• Which gas is commonly known to be colorless, odorless, and tasteless?
• What is the purpose of the TSSA Fuel Safety inspector's order?
• What causes negative pressure in a building?
• How should gas pressure requirements for an appliance be determined?
• Why is it important to use a pressure regulator in gas systems?
• What is the maximum allowed spacing for supports on NPS 3 horizontal piping?
• How should underground piping joints be constructed?
• What does a damper regulate?
• What is the BTU output of an electric heater rated at 20 kW?
• What must be done prior to installing an appliance that requires a variance?
• The purpose of a gas regulator is to maintain what?
• True or False: A Fuels Safety Inspector designated by TSSA can enter a commercial building without advance notice.
• What is the required minimum test duration for welded gas piping systems of 200 feet or more at 10 psig?
• Which agency is responsible for regulating civil aviation in the United States?
• In low pressure gas line testing, what is the primary goal?
• What should be done before installing gas appliances?
• As temperature increases, what happens to the pressure in propane cylinders?
• What does the air supply to a gas-fired appliance include?
• What action should be taken if the gas piping is subjected to high pressure?
• What defines a Category IV appliance?
• How does the ignition temperature of propane compare to that of natural gas?
• What is the maximum allowed distance between piping supports for NPS 2 piping when run horizontally?
• What characterizes a series circuit?
• How is the total resistance in a series circuit determined?
• What is the current required to operate a device rated for 1200 watts at 120 volts?
• What is the maximum operating pressure for any component in a fuel system?
• Who is responsible for pressure testing a piping system?
• Which of the following are properties of carbon monoxide gas?
• What is the importance of ensuring proper venting when working with low pressure gas lines?
• Electrical potential is measured in what unit?
• What is the maximum natural gas or propane gas pressure allowed inside a one- or two-family dwelling?
• What does a 'VA' rating on a transformer indicate?
• Piping of NPS how many inches should have welded pipe joints?
• Does propane liquid escaping from a container rapidly drop in temperature?
• For proper functioning, how far should a purge line be from a building?
• Who is the Authority having Jurisdiction in the Ontario gas industry?
• What type of equipment is essential for monitoring pressure in gas systems?
• Which code governs the installation of propane supply systems in mobile homes?
• How is the performance of an electric heater measured in heating output?
• How is propane classified?
• Where can the properties of natural gas and propane be found?
• What is the chemical formula for Nitrogen?
• Which of the following describes a symptom of severe carbon monoxide poisoning?
• What type of air is involved in the combustion process?
• What is the term for secondary air in combustion products?
• What is the maximum allowable natural gas pressure in an industrial mechanical room?
• Which of the following best describes a characteristic of low pressure gas lines?
• What will an ohmmeter reading show across a blown fuse that is removed from the circuit?
• Where should a readily accessible manual shut-off valve for a commercial appliance be installed?
• What does CSA stand for in relation to safety standards?
• What does a decrease in resistance in an electrical circuit allow?
• What is a typical sign of a gas leak?
• Which federal agency is responsible for ensuring safe and healthy working conditions?
• Why is it important to use malleable iron fittings with steel pipe?
• For complete combustion of propane, what is the air to gas ratio required?
• Where should a readily accessible shut-off valve be installed?
• Which material is commonly used for gas piping in residential applications?
• Which types of copper tubing are suitable for gas supply?
• What instrument is used to measure the pressure of gases or liquids?
• Which of the following would be classified as a 'care and detention building'?
• According to safety standards, which gas is not considered flammable?
• What is the purpose of a manual shut-off valve?
• What type of valve is commonly used as a shut-off in gas pipelines?
• What should the voltage reading across an open switch in an energized electrical circuit show?
• What does OSHA stand for?
• True or False: A gas hose can be connected directly to building piping without any standards.
• How must gas piping or tubing be identified in commercial, industrial, and assembly buildings?
• What family do natural gas and propane belong to?
• Where should a shut-off valve be installed on gas hoses?
• What function does a tamper switch serve in equipment?
• Is it true or false? There are no perfect electrical conductors or insulators.
• What factors must be present for effecient electrical flow?
• What qualifications are required for a person welding gas piping?
• What is the normal propane gas building line pressure for a single-family residence?
• What is the first action to take after a fire or carbon monoxide incident?
• What describes an intermittent ignition source?
• Which organization is responsible for gas appliance regulations in Ontario?
• What is the purpose of appealing to the Provincial Divisional Court?
• At what frequency is AC power produced in North America?
• What is the purpose of using a shut-off valve in a gas installation?
• What must an installer ensure before replacing a part of an appliance or equipment?
• What action should NOT be done until a TSSA inspector releases the scene after an incident?
• What odorant is commonly added to natural gas and propane?
• What is the minimum size of a dirt pocket diameter required for gas piping?
• A technician installing an appliance must ensure what when activating an appliance?
• What is the characteristic of direct current (DC) measurements?
• During testing, what safety equipment is essential for gas line technicians?
• How many watts are equivalent to one horsepower of mechanical power?
• Which agency is responsible for protecting human health and the environment?
• Which type of fittings are permitted with steel pipe?
• What typically causes a long, yellow flame on an atmospheric burner?
• For threaded gas piping systems of 200 feet or less with a working pressure of 10 psig, what is the minimum test pressure required?
• How deep must underground piping or tubing be buried under a residential lawn?
• When completing the installation of a gas appliance, what is essential to guarantee its safe operation?
• True or False: A quick-disconnect device must have a shut-off valve upstream of it.
• What is the minimum depth of burial for piping and tubing in residential installations?
• What is a critical factor when determining the compatibility of piping materials?
• What condition allows electricity to flow through a circuit?
• How many inches must the unthreaded portion of a piping outlet extend through a floor?
• What is the ohmmeter reading across a good fuse that is removed from the circuit?
• Does a Boiler and Pressure Vessels Inspector have the same powers as a Fuels Safety Inspector designated by TSSA?
• Which device is utilized to check for electrical continuity?
• According to regulations, the installation of gas-burning appliances in mobile homes should comply with which code?
• What is the approximate dew point of water vapor in combustion gases?
• What type of appliance requires a manual shut-off valve in its installation?
• Which type of gas appliance typically uses low pressure gas lines?
• What does the term 'housekeeping unit' refer to?
• Which of the following is NOT a characteristic of direct current measurements?
• What type of gas is carbon monoxide?
• Can the director of the Fuel Safety Division suspend an authorization without prior notice?
• True or False: No. 14 AWG electrical wire is thicker than No. 16 electrical wire.
• What is the primary function of a pressure regulator?
• Which organization is responsible for the National Gas and Oil Codes in Canada?
• The function of a thermocouple in a gas appliance is to:
• How much is one boiler horsepower approximately in Btuh?
• What is natural gas mainly comprised of?
• A stationary device used to divert the flow of flue gases is known as what?
• What is the role of gas regulators in a gas system?
• What is a damper’s function in a gas system?
• What does a DC voltage measurement indicate if the test leads are reversed?
• Which of the following is NOT a responsibility of the Technical Standards and Safety Authority (TSSA)?
• What happens if one load fails in a series circuit?
• What are two undesirable products of incomplete combustion?
• Is carbon monoxide considered toxic?
• What is the meaning of the term 'certified' in relation to gas appliances?
• What is the role of a pressure relief valve?
• Which of the following is a sign of improper gas combustion?
• What should a Gas Technician do if they find an appliance that presents an immediate hazard?
• What type of gas is typically contained in a propane cylinder?
• What indicates a badly burned or charred fuse?
• Which three elements are required for combustion of any fuel?
• What is the consequence of not disconnecting power from an electrical circuit in case of an electric shock?
• What is the main concern when constructing underground piping joints?
• What is the required support frequency for rooftop gas piping?
• What is the purpose of sloped tube manometers in the context of low pressure gas line testing?
• What is the recommended hose length for connecting to a construction heater?
• What does the Ontario Electrical Safety Code primarily govern?
• How is electrical current typically measured?
• What are the consequences of failing to ensure the required air to gas ratio?
• Which of the following is a common hazard associated with gas appliances?
• In which units is electrical power measured?
• What is the chemical formula for oxygen?
• What is a key result of complete combustion of natural gas?
• What is the definition of a living unit?
• How far must conductors extend into a junction box?
• An ampere is a unit for the measurement of what?
• What is the chemical formula for Propane?
• What does Annex H of the B149.1 Code provide?
• What is the primary purpose of an emergency shut-off valve in a gas system?
• What is the function of a hose station in gas supply systems?
• What is the significance of using approved junction box connectors?
• Where should all branch connections off the main gas supply line be made in a recreational vehicle?
• What are the dimensions of line connection terminals on a 120-volt receptacle?
• Is propane heavier or lighter than air?
• When should a Gas Technician inform the owner or distributor about an appliance's hazard?
• In relation to gas technician duties, what is the purpose of reporting a variance?
• True or False: A voltage drop never occurs across a switch.
• What is the main reason for using a sloped tube manometer over other types of pressure gauges?
• True or False: A heat exchanger on a forced air furnace can be repaired if the welder is certified by TSSA.
• When should a gas technician report an unsafe condition of a gas appliance?
• What is a common tool used to measure low pressure in gas lines?
• Which code is important for ensuring safety in natural gas and propane installations?
• (True/False) Electrical current flows through a capacitor to increase the starting torque on a motor.
• What happens when resistors are connected in series?
• What action should a gas technician take for an unapproved appliance?
• What is the ignition temperature range for propane gas?
• If voltage is held constant, what factor could lead to an increase in current?
• Is it true that the gas code allows for the repair of a damaged heat exchanger in a dwelling?
• Which of the following can be a material for gas piping?
• How much unthreaded pipe must extend beyond the finished wall or ceiling when penetrating a structure?
• What is the primary purpose of ensuring that replacement parts are equivalent?
• What does negative pressure in a building typically indicate?
• What type of gas must be used to purge the air from a pipe that has an NPS of less than or equal to 2.5" and is over 50' in length?
• At what concentration can propane be detected for odour detection purposes?
• What can be inferred when there is a voltage drop indication in a circuit?
• Who is the Technical Standards and Safety Authority (TSSA)?
• Who is legally permitted to weld gas piping?
• What should a gas technician consider when identifying unapproved appliances?
• What is the maximum BTUh input for gas-fired equipment that a holder of a G2 certification can install and service?
• What is the equivalent resistance when two 20 W resistors are connected in parallel?
• When a quick-disconnect is used on a gas supply system, what device must be included in the piping system?
• Which codes must a G3 technician comply with when working on gas-fired installations?
• Which code outlines the standards for natural gas and propane system installations?
• What is the focus of the B149.1 Gas Code?
• What unit is used to measure electrical resistance?
• What is the minimum termination distance for a purge line from a building or air intake?
• What is the maximum allowed length for portable appliances?
• What is the equivalent resistance of two 20 W resistors in series?
• What is the maximum propane supply pressure allowed in a single-family dwelling?
• What defines a 'care and detention building'?
• What does the term electromotive force (EMF) refer to?
• How frequently shall electrical wires be supported in an installation?
• What is the time limit for correcting unacceptable conditions in the gas industry?
• What is a transformer with more turns on the secondary windings called?
• If a gas technician identifies a gas leak during inspection, what is the first action they should take?
• Under what condition is a homeowner exempt from certification for gas furnace work?
• What kind of gas systems do the gas code primarily focus on?
• What do materials that conduct electricity refer to?
• What hazard is associated with a sparkling or churning flame in a gas appliance?
• What type of flame indicates incomplete combustion in gas appliances?
• Is the statement true or false? The holder of a valid G2 certificate is authorized to work on the carburetion system of a propane powered highway vehicle.
• When considering an induction coil in an electromagnet, what is true about the current flow when electromagnetic force is not doing work?
• What is the primary component that makes up 85% to 95% of natural gas?
• What is the typical safe working pressure for residential gas lines?
• What is the maximum propane supply pressure allowed in a central mechanical room?
• When are piping systems required to be tested for leaks?
• What type of transformer is referred to as a step down transformer?
• What is the function of the flexible connector in gas systems?
• What should be considered during the installation of gas piping?
• What is the relative density of liquid propane compared to water?
• What is the minimum distance for gas piping below a commercial parking lot?
• In the context of electrical circuits, what is meant by 'Voltage'?
• What characterizes a dwelling unit?
• The electrical code requires that how many bare conductors can be connected to a screw terminal?
• What is the required visibility of unthreaded pipe extending beyond finished flooring?
• When there is a conflict between manufacturer's instructions and CSA B149.1 code, which requirement should prevail?
• What is one typical cause of gas leaks in piping systems?
• Why should pipe thread protectors not be used in installations?
• Where is odorant typically added to natural gas?
• How frequently should gas pipe or tubing be marked in feet?
• What is the maximum allowed length for a gas hose?
• Which of the following fittings are not allowed on a gas piping system?
• What is the maximum length permitted for a corrugated metal connector?
• What happens to current in a simple circuit when voltage increases?
• What type of facility is designed for individuals requiring special care?
• What does a TSSA Fuel Safety inspector order signify?
• What type of transformers are used for ignition purposes?
• Which of the following low pressure levels typically classifies a gas line?
• What type of care do facilities for individuals requiring special care typically provide?