Gas Technician 3 (G3) License Practice Exam

These questions are part of the practice quiz. Start practicing

• Which component is essential for preventing gas flow when an appliance is off?
• In an electrical circuit, what is the term used to describe the opposition to the flow of electric current?
• What is the primary purpose of gas shutoff valves?
• What is an important safety action to take when a gas leak is suspected?
• A ________ is used to check for continuity:
• What type of gas is considered odorless and colorless in its natural state?
• How far should a dryer vent terminate from a service regulator vent?
• What happens to voltage in a circuit if the path is open?
• Which of the following best describes an industrial building?
• What must be inspected during a gas appliance safety check?
• What is typically required for the venting of gas appliances?
• Which of the following is a primary function of a gas technician?
• What type of fittings are typically used in gas pipe installations?
• Resistance is measured in what unit?
• What does the term "BTU" stand for in gas terminology?
• #14 AWG electrical wire is approved for use on ______ amp circuits.
• True or False: Less than one ampere of electricity can kill a person.
• How soon must a certificate holder inform the TSSA of a change of address?
• What are the two common types of gas used in residential heating systems?
• When checking an open circuit with an analogue meter, what resistance reading would you get?
• Are gas piping systems tested for leaks after installation?
• What should a gas technician do if an installation does not conform to regulations but poses no immediate danger?
• Which of the following is addressed in the B149.1 installation code?
• Which code establishes minimum standards for repairing and servicing gas appliances?
• Which gas appliance component regulates the gas supplied to the pilot light?
• Which of the following could indicate that the circuit is malfunctioning?
• What should be regularly checked in a gas appliance to prevent leaks?
• If a 1/2 cubic foot test dial makes one complete revolution in 18 seconds, what is the input in BTUH?
• What is the principle of operation of a gas safety shutoff?
• What type of circuit allows current to flow through multiple paths?
• Power is measured in?
• A boiler is primarily designed to do what?
• How does a continuous pilot differ from other pilot types?
• What is the function of an ohmeter?
• In a parallel circuit, what is the total current?
• What is the purpose of an assembly building?
• Which organization is responsible for administering fuel regulations for the installation of gas and oil appliances in Ontario?
• Why is sufficient ventilation critical when using gas appliances?
• What should you do if you smell gas in a building?
• Which organization registers certified gas and oil technicians in Ontario?
• Which type of appliance does not mix flue gases with the medium being heated?
• How often should gas appliances typically be serviced to ensure safety?
• Which code expression refers to a building primarily for production or processing purposes?
• Which electrical unit is equivalent to one joule per second?
• What is the required diameter of a drip or dirt pocket in relation to the piping it serves?
• What type of gas detector is essential in homes with gas appliances?
• What defines a dwelling unit?
• What is the main responsibility of a gas technician when they encounter a non-compliant installation?
• In a gas piping system, what is the necessary additional length considered for any fittings?
• Is current the same throughout a series circuit?
• What element is critical for ensuring the combustion process in gas appliances?
• Propane cylinders used in Ontario must be manufactured and approved according to the requirements established by?
• If voltage is constant in a resistive circuit, when current increases, resistance?
• Is it true that a #18 AWG wire is rated for higher current than a #10 AWG wire?
• Atoms are electrically neutral when they contain the same number of which two particles?
• A _____ is used to join two wires together.
• How many amps are required to operate a device rated for 1500 watts at 120 volts?
• What tool is primarily used for measuring gas pressure?
• One watt equals?
• In a step-down transformer, the turns ratio is such that the secondary coil has how many turns compared to the primary?
• What safety device should be included with all gas appliances to detect harmful gases?
• In a parallel circuit containing resistors of 3, 7, and 10 ohms, the lowest current flow would be through which resistor?
• What does the abbreviation C.S.A. represent regarding gas appliances?
• What is the term for the unsafe buildup of gas in an enclosed space?
• What occurs during a "flashback" in gas burners?
• What term describes the phrase 'acceptable to the authority having jurisdiction'?
• What is the benefit of using a threaded fitting in gas applications?
• One motor horsepower is approximately equal to what value in watts?
• If resistance is constant in a resistive circuit and there is a voltage surge, what will happen to the current?
• Why is regular maintenance crucial for gas appliances?
• Which of the following is NOT correct regarding the usage of shipment fittings in installations?
• What is the maximum allowable pressure for most residential gas piping systems?
• In the event of an immediate hazard, what is the first action a gas technician should take?
• Where should all branch connections off the main gas supply line be made on a recreational vehicle?
• On a 120 receptacle, the line (hot) connection terminals are?
• What gas is primarily used in residential heating applications in North America?
• What type of flame is considered undesirable on a gas appliance?
• On a 120 volt receptacle, the ground connection terminals are?
• What material should pipe fittings in gas piping systems be made of?
• What does the term “scavenging” refer to in gas combustion?
• What is the primary purpose of a gas pressure regulator?
• In which situations should flexible gas connectors be employed?
• What is the maximum input a G3 technician is allowed to reactivate for existing installations?
• What is the name of the device that increases voltage in a circuit?
• When inspecting gas piping, what does a closed manual shut-off valve imply about the system?
• What is the significance of the National Fuel Gas Code (NFPA 54)?
• Which component is crucial for ensuring that a gas appliance operates safely?
• What does the term "leak detection" refer to in gas systems?
• What is a critical factor to consider when selecting gas appliances for installation?
• Why are stainless steel connectors often preferred in gas systems?
• Where should unions and swing joints NOT be used in gas piping?
• What tool is used to check for potential voltage?
• Which of the following terms describes a building meant for the consumption of food and drink?
• What is a common fault that can lead to gas appliance failure?
• What is the typical operating pressure for residential natural gas?
• Which of the following may be used as a neutral wire?
• A voltage is induced in a conductor when the conductor is?
• What is the main factor that determines the combustion efficiency of a gas appliance?
• What is the role of a gas trainer or instructor?
• The total resistance of two 10 ohm resistors connected in series is what?
• The kilowatt output of an electric heater with a 240 volt supply and a current draw of 50 amps is?
• The holder of a G2 certification may install and service gas fired equipment with inputs up to what maximum BTU/hour?
• The resistance reading across a good fuse would be?
• In a circuit, what happens to the total current as more branches are added in parallel?
• What size should a branch piping outlet be if installed in the main supply piping before its size is known?
• What should the voltage reading be across an open switch of an energized electrical circuit?
• When a voltage measurement is being taken on a DC circuit, what does it indicate if the needle on the analogue meter moves to below 0 on the scale?
• When should a gas appliance be serviced?
• Can pipe previously used for natural gas be repurposed for propane?
• Which component is responsible for monitoring the proper flow of gas to the burner?
• What does a digital ohmmeter typically display when connected across an open circuit?
• Which of the following is essential for the safe operation of gas appliances?
• What is a common indicator that a gas appliance is functioning efficiently?
• A step-up transformer produces a secondary voltage that is what compared to the primary voltage?
• What is the importance of labeling gas shutoff valves in terms of safety?
• Which aspect should be checked regularly to ensure the safe operation of gas appliances?
• Which scenario requires a gas technician to take immediate action?
• What is one of the first steps in troubleshooting a gas appliance?
• When it has been determined that the voltage to a unit is approximately 115 volts, which range should an analogue meter be set at to achieve the most accurate reading?
• For residential natural gas piping under 200 ft and less than 2 psig, what is the pressure test time?
• What type of copper tubing is acceptable for underground service?
• What type of transformer produces a secondary voltage lower than the primary voltage?
• Propane cylinders manufactured in Canada after January 1, 1993 are required to be built and marked according to the specifications of?
• A dwelling unit typically includes which of the following?
• What is the importance of proper drainage in gas appliance installation?
• What is the BTUH output of an electrical heater rated at 15 KW?
• What is a common sign of gas leaks in appliances?
• What is the recommended minimum distance for venting gas appliances from property lines?
• Which gas appliance is commonly used for cooking?
• Which type of structure is defined as a commercial building?
• What is the primary function of an appliance gas valve?
• What type of burn occurs with insufficient air in gas appliances?
• If a circuit is wired so that the electrons can only flow in one possible path, what type of circuit is it?
• What is the primary purpose of a flue or chimney in gas appliances?
• What is an indicator of a gas appliance operating inefficiently?
• What is the minimum depth a gas line must be buried under a lawn?
• What action should be taken if a gas appliance installation is found to be non-compliant?
• Which range should you select when checking for unknown voltage supply with an analogue meter?
• Potential is measured in?
• In gas installations, what does TSSA stand for?
• To determine the longest length for systems operating over 2 psig, what must be added?
• When installing a gas appliance, which aspect is crucial in ensuring safety?
• What standard must steel piping used in gas installations comply with?
• What is the ultimate authority under the TSSA regarding the installation of natural gas and propane appliances and equipment?
• What should be done before servicing a gas appliance?
• An #18 AWG wire has a smaller diameter than a #10 AWG wire. Is this statement true or false?
• Which of the following organizations is accredited to certify gas appliances, equipment, and accessories?
• What is the primary function of a gas vent termination?
• Why are the fittings used to protect pipe threads during shipment not allowed in installations?
• What does the term "backdrafting" refer to in gas appliance operation?
• What condition is often caused by high humidity in the space where a gas appliance is located?
• In Ontario, the re-qualification of refillable propane cylinders must follow procedures established by?
• What is the total resistance of two 10-ohm resistors connected in parallel?
• What can be a potential consequence of neglecting gas appliance maintenance?
• How must a branch line that is no longer required be terminated in a residential setting?
• Insulators are materials that do not readily produce?
• How is the actual pressure drop in a gas line calculated?
• What does a short circuit usually result in?
• How does water depth affect the burial requirement for gas lines?
• What should be checked regularly to prevent gas leaks in installations?
• Electromotive force refers to what concept in electrical terminology?
• During a circuit test, what is the safest way to handle the equipment?
• A blackened fuse usually indicates a _________ circuit.
• Which type of gas burns with a blue flame indicating efficient combustion?
• How should gas pressure tests be performed on existing systems?
• What is the effect of high elevation on gas appliances?
• In a circuit, if the resistance is doubled and voltage remains constant, what happens to the current?
• How many conductors can be wrapped around a screw terminal?
• When converting an appliance from another form of energy to gas, what must the installer do?
• What should be done with old gas appliances once they are replaced?
• What is the primary purpose of an overflow trap in gas pipelines?
• What is the role of a pilot light in a gas appliance?
• The formula for calculating power in an electrical circuit is represented by which expression?
• Which practice contributes to overall gas safety in residential areas?
• What type of pilot light burns continuously throughout the entire time the burner is in service?
• Which device is primarily used for measuring electrical current?
• What term is used to describe an appliance that supplies hot liquid or vapor for space heating?
• What is the color associated with the neutral connection terminals on a 120 volt receptacle?
• A steam boiler must conform to the requirements of?
• What regulations must all gas installations comply with, in addition to manufacturer’s instructions?
• What does high carbon monoxide levels in a home typically indicate?
• What safety measure should be practiced when working with gas pipelines?
• Which component typically has a resistance of 0 ohms when functioning properly?
• Current is measured in which unit?
• What does the movement of the 1/2 cubic foot test dial indicate if the manual shut-off valve is closed?
• What is the purpose of a pressure drop test in gas systems?
• The current required by a 1000 watt device at 120 volts is approximately what?
• Transformers that share a winding or part of a winding are called what?
• What type of gas is propane considered?
• What is the resistance reading across a good fuse?