TREC Home Inspector National Exam – HVAC Questions and Answers Already Passed

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TREC Home Inspector National Exam – HVAC Questions and Answers Already Passed For mechanical systems, a level working space at least _____________________ inches deep and _____________________ i... nches wide shall be provided in front of the control side to service an appliance. ✔✔30"; 30" When mechanical equipment is located in attics, it shall not be further than _____________________feet from the attic access. ✔✔20' Attics containing mechanical appliance shall be provided with an opening and a clear and unobstructed passageway to allow removal of the _____________________ appliance. ✔✔largest Mechanical appliances installed in attics shall have a luminaire controlled by a switch located at the required _____________________ _____________________ and a receptacle outlet provided at or near the appliance location. ✔✔passageway opening Mechanical appliances suspended from the floor shall have a clearance of not less than _____________________inches from the ground. ✔✔6" Mechanical appliances having an ignition source shall be elevated such that the source of ignition is not less than _____________________above the floor in garages. ✔✔18" Supports and foundations for the outdoor unit of a heat pump shall be raised at least _____________________ inches above the ground. ✔✔3" A 4-inch radius mitered 45 degree elbow dryer exhaust duct fitting shall reduce the maximum 35- foot length of a dryer duct by _____________________ feet, _____________________inches. ✔✔2'; 6" Where a space for a _____________________ _____________________ is provided, an exhaust duct system shall be installed. ✔✔clothes dryer Under-floor plenums shall be _____________________ in new structures. ✔✔prohibited Outdoor and return air for a forced-air heating or cooling system shall not be taken from _____________________. ✔✔closets, bathrooms, toilet rooms, kitchens, garages, boiler rooms, furnace rooms, unconditioned attics, or other dwelling units For mechanical system installations in flood hazard areas, _____________________ _____________________ openings shall be located at or above the required elevation. ✔✔combustion air Manually operated vent _____________________ shall not be installed except in connectors or chimneys serving solid-fuel-burning appliances. ✔✔dampers Freestanding or built-in ranges shall have a vertical clearance above the cooking top of not less than _____________________ inches to unprotected combustible material. ✔✔30" Sauna heaters shall be equipped with a thermostat that will limit room temperature to not greater than _____________________degrees F. ✔✔194⁰F For gas appliance installations using the two-permanent-openings method for combustible air from the outdoors, one opening shall be within _____________________ inches of the top and one within _____________________inches of the bottom of the space. ✔✔12"; 12" BTU is the abbreviation for _____________________ _____________________ _____________________, which is the quantity of heat required to raise the temperature of 1 pound of water by 1 degree F. ✔✔British Thermal Unit Fuel gas piping installed across roof surfaces shall be elevated not less than _____________________ inches above the roof surface. ✔✔3 1/2" Where gas piping is concealed and run within _____________________ inches from the edge or wood studs, joists, rafters, and similar members. It shall be protected by shield plates. ✔✔1.5" Shield plates, when required, shall cover the area of concealed gas piping and shall extend a minimum of _____________________ inches to each side of a stud, joist, or rafter. ✔✔4" Underground fuel gas piping systems shall be installed a minimum depth of _____________________inches below grade. ✔✔12" Gas appliance shutoff valves shall be located in the same room as the appliance and not further than _____________________ feet from the appliance. ✔✔6' Fuel gas appliance connectors shall not exceed an overall length of _____________________ feet ✔✔6' Gas vents over 12 inches in size shall terminate not less than ____________________ feet above the highest point where they pass through the roof. ✔✔2' A Type B or a Type L gas vent shall terminate at least _____________________feet in vertical height above the highest connected appliance draft hood or flue collar. ✔✔5' A Type B-W gas vent shall terminate at least _____________________ feet in vertical height above the bottom of the wall furnace. ✔✔12' Vent connector for draft-hood-equipped appliances shall not be _____________________ than the draft hood outlet diameter. ✔✔smaller The lowest portion of a gas floor furnace shall have not less than _____________________ inch clearance from grade level. ✔✔6" What size are fuel-gas-fired domestic clothes dryer ducts? ✔✔4" Domestic clothes dryer transition ducts shall be metal and limited to a single length not to exceed _____________________feet. ✔✔8' The minimum unobstructed total area of the outside and return air ducts or openings to a forced warm-air furnace shall not be less than _____________________ square inches for each 1000Btu/h output rating. ✔✔2sqin Gas shutoff valves should be either ________ [Show More]

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