G2 Exam Quiz Bank (2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A

G2 Exam Quiz Bank (2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A Q: The STACK EFFECT in a water heater is usually caused by Answer: Short draws of water from the heater Q: A 120v power supply for a residential electrical circuit is taken from the Answer: - Load side of one branch circuit breaker and a neutral lug Q: The minimum allowable distance to be maintained from a 50,000 btuh water heater flue outlet gas regulator Answer: 3' 21. Which of the controls listed below controls the gas pressure to the main burner, the temperature of the water, and turns off the gas when the pilot goes out? Answer: Unitrol Q: A hard sharp pilot flame indicates Answer: The orifice is too small Q: When the test button on an electronic air cleaner is pushed and an arcing or snapping sound is heard , it most likely indicates that the air cleaner Answer: Is working properly Q: What is the required minimum plastic or tubing must be instakked under a commercial parking lot Answer: 24" Q: An unvented infra-red heater can be installed in application Answer: All of the available choices Q: A proper heat loss calculation has been performed for a house which requires a furnace replacement. The numbers indicate the heat loss is 100,000 Btu/h. Which of the following furnaces should be selected for the installation?- Answer: A 120,000 btuh input furnace with a AFUE rating of 85% Q: How is the heat anticipator setting determined for a thermostat with an adjustable anticipator Answer: By measuring the current drawn by the components in the circuit being fed directly from the thermostat Q: The best location to install an electronic air cleaner is in the Answer: Return air duct as close to the furnace as possible Q: Gross stack temperature is the flue gas temperature Answer: upstream of the draft hood Q: What must be done during the installation of a gas log fireplace Answer: Secure the chimney damper in the open position 31. A low water cut off is required on a steam boiler not under continuous attendance by a certified operator, when the rated input is Answer: any value Q: How long may a corrugated flexible connector be when installed on a range Answer: 6 feet Q: What is the recommended location for a cooling coil on a suspended or horizontal furnace Answer: on the supply air side Q: A water 60,000 Btuh water heater with a draft diverter is to be installed where all air is to be taken from indoors. Which of the following is required to satisfy the air requirements? Answer: A 60 square inch lower opening and a 60 square inch upper opening Q: What is the pressure relief valve setting for most residential type water heaters? Answer: 150psig Q: When is it necessary to use a sleeve at the point the connector enters the chimney when a vent connector is being used to connect an appliance to a masonry Answer: Alway Q: A one-half cubic foot test dial on a meter makes one revolution every 22 seconds. Approximately how much heat is being generated? Answer: 82,000 Q: When a vent connector used for an appliance having a draft hood must be located in or passed through a crawl space or other area that may be cold, what material must the entire vent connector be made of? Answer: Type B or type L vent Q: A combination fan limit control Answer: Controls the blower operation and shuts the burner off on over temperature