F32 National Standard Residential Mechanical Class C Exam Quiz Welcome to your free F32 National Standard Residential Mechanical Class C Exam Quiz REQUIRED - Enter your email address to receive a printable copy of your test results. 1. Vents for natural draft gas vents serving wall furnaces must terminate at a minimum elevation of __________ above the bottom of the furnace. 6 feet 8 feet 10 feet 12 feet None 2. Freestanding or built-in ranges must have a minimum vertical clearance above the cooking top of __________ to unprotected combustible material. 24 inches 30 inches 36 inches 42 inches None 3. When a cooling unit is installed in an attic where structural damage may occur if condensate leaks, what is required? Only a primary drain line A secondary (auxiliary) drain pan and/or secondary drain line A moisture-sensing alarm only Condensate disposal directly onto the roof material None 4. Before a new gas piping system is put into service, it must be pressure tested. The test pressure shall not be less than 1.5 times the proposed maximum working pressure, but not less than: 3 psig 5 psig 10 psig 15 psig None 5. Return air for a forced-air heating or cooling system is prohibited from being taken from which of the following locations? A hallway A living room A kitchen or bathroom A finished basement None 6. Fuel gas piping is strictly prohibited from being installed in or through a: Concrete slab Crawl space Circulating air duct or clothes chute Floor joist cavity None 7. What is the minimum required upward slope for a horizontal vent connector attached to a gas-fired appliance? 1/8 inch per foot 1/4 inch per foot 1/2 inch per foot 1 inch per foot None 8. When using the standard indoor method for combustion air, the space must have a minimum volume of ________ per 1,000 Btu/h of the aggregate input rating of all appliances in the space. 25 cubic feet 40 cubic feet 50 cubic feet 100 cubic feet None 9. Flexible air connectors shall be limited in length to a maximum of: 8 feet 10 feet 14 feet 20 feet None 10. A Type B gas vent terminating above a flat roof (with a pitch of flat to 6:12) must terminate a minimum of ________ above the roof, provided it is at least 8 feet from a vertical wall. 1 foot 2 feet 3 feet 4 feet None 11. What is the maximum allowable length of a standard 4-inch-diameter clothes dryer exhaust duct when no booster fan is used and there are no fittings (elbows) in the run? 15 feet 25 feet 35 feet 45 feet None 12. Condensate drain lines from cooling coils or evaporators must have an internal diameter of not less than: 1/2 inch 3/4 inch 1 inch 1-1/4 inches None 13. In seismic areas, anchorage and strapping of appliances must be designed to resist a horizontal force equal to __________ of the operating weight of the water heater storage tank, acting in any horizontal direction. 1/4 1/3 1/2 3/4 None 14. An appliance shutoff valve must be located within ________ of the appliance it serves. 3 feet 6 feet 10 feet 12 feet None 15. If an appliance requiring access is located on a roof with a slope of 3:12 or greater, what must be provided? A permanent ladder A safety harness anchor point A level platform at the appliance control side A guardrail around the entire roof perimeter None 16. Bathroom exhaust fans must discharge directly to the outdoors. The exhaust termination must be at least ________ from property lines or operable openings into the building. 3 feet 5 feet 10 feet 12 feet None 17. When a mechanical appliance is installed in an attic, the access opening must be a minimum of: 20 inches by 24 inches 22 inches by 30 inches 24 inches by 30 inches 30 inches by 30 inches None 18. Domestic clothes dryer exhaust ducts must convey moisture and lint to the: Crawl space Attic Outdoors Soffit vent None 19. Factory-made air ducts and flexible air connectors shall have a maximum flame spread index of: 25 50 100 200 None 20. Domestic cooking exhaust systems (range hoods) capable of exhausting in excess of ________ require makeup air to be provided. 200 CFM 300 CFM 400 CFM 600 CFM None Prove you are human Time is Up!
