TREC Home Inspector A+ Grade Compiled Questions and CORRECT Answers
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Course
TREC Home Inspector
Institution
TREC Home Inspector
For mechanical systems, a level working space at least _____________________ inches deep
and _____________________ inches 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
_____...
TREC Home Inspector A+ Grade Compiled Questions and CORRECT Answers For mechanical systems, a level working space at least _____________________ inches deep and _____________________ inches wide shall be provided in front of the control side to service an appliance. ✔✔- 30"; 30" When mechanical equip ment 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, 22 by 30inches Mechanical appliances installed in attics shall have a luminaire controlled by a switch located at the required _____________________ _____________________ and a 120 volt receptacle outlet provided a t 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 e levated 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 fo rced-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 fl ood 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 sol id-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 Confined Space and Combustion Air If the volume of space where the appliance is located is less than 50 cubic feet of space per......BTU per hour of aggregate input of the appliance, then it is a confined space. 50 cubic feet = 2.5 feet x 2.5 feet x 8 feet In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases. However , in buildings of tight construction -- for example, doors and windows that have weatherstripping, walls that are heavily insulated, openings that are caulked, floors and walls with vapor barriers, etc. -- additional air may need to be provided. Solution Two permanent openings to adjacent spaces could be provided so that the combined volume of all spaces meets the requirements. If the building is sealed so tightly that infiltration air is not adequate for combustion, combustion air should then be obtaine d from outdoors ✔✔- 1,000 All Air from Inside the Dwelling If all combustion air is taken from the inside of the dwelling, then two permanent openings should be installed. One opening should be within ........ inches of the top and one within ...... inches of the bottom of the space. Each opening shall have a free area equal to a minimum of 1 square inch per 1,000 BTU -per-hour input rating of all appliances installed within the space, but not less than 100 square inches. ✔✔- 12,12 All Air from Outdoors If all combustion air is taken from the outdoor air, then one opening should be within 12 inches of the top and one within 12 inches of the bottom of the space. The openings are permitted to connect to spaces directly communicating with the outdoor air, such as a ventilated crawlspace or ventilated attic space. Each opening should have a free area of at least 1 square inch per 4,000 BTU per hour of total input rating of all appliances in the space when using ......ducts, or 2,000 BTU per hour if using .......ducts. ✔✔- vertical ducts 4,000 BTU/ horizontal ducts 2,000 BTU Louvers In calculating the free area of a combustion air opening fitted with louvers, the inspector should note that metal louvers obstruct about ........ of the opening, and wooden louvers obstruct ...... of it. ✔✔- metal 25%, wood 75% Backdraft The lack of dilution air (the air used for draft) may cause a condition of backdraft at the furnace. Backdraft occurs when the combustion gases are not drafting or rising up through
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