2015 ICC M1 Residential Mechanical Inspector Exam Quiz Welcome to your free 2015 ICC M1 Residential Mechanical Inspector Exam Quiz REQUIRED - Enter your email address to receive a printable copy of your test results. 1. Self-contained refrigeration systems containing __________ or less of refrigerant do not require a permit. 5 pounds 10 pounds 15 pounds 20 pounds 2. Strapping of appliances in seismic areas must be designed so that the strapping at the lower point maintains a minimum distance of __________ above the controls. 2 inches 4 inches 8 inches 16 inches 3. In vented floor furnaces, the furnace register must be located a min. of __________ from doors in any position, draperies or similar combustible objects. 6 inches 12 inches0 18 inches 24 inches 4. Piping for a secondary drain or auxiliary drain pan required for a cooling or evaporator coil, must maintain a min. horizontal slope in the direction of discharge a min. of __________ . 1/8 unit vertical in 12 units horizontal 1/4 unit vertical in 12 units horizontal 1/3 unit vertical in 12 units horizontal 1/2 unit vertical in 12 units horizontal 5. Clothes dryer exhaust ducts must not be joined with screws that protrude more than __________ into the inside of the duct. 1/8 inch 1/4 inch 1/3 inch 1/2 inch 6. Metal ducts in underground duct systems must be protected from corrosion in an approved manner or must be completely encased in concrete a min. of __________ thick. 1 inch 2 inch 3 inch 4 inch 7. Return air openings for heating, ventilation and air conditioning systems must be located a min. of __________ from an open combustion chamber or draft hood of another appliance in the same room or space. 5 feet 10 feet 15 feet 20 feet 8. The horizontal run of an uninsulated connector to a natural draft chimney must not exceed what percentage of the height of the vertical portion of the chimney above the connector? 25% 50% 75% 100% 9. Unless otherwise specified, gas piping systems installed underground must be at least __________ inches below grade. 6 inches 12 inches 18 inches 24 inches 10. In garages, appliances that have an ignition source must be elevated such that the source of ignition is not less than __________ above the floor. 12 inches 18 inches 24 inches 30 inches 11. Exhaust systems capable of exhausting more than __________ must be mechanically or passively provided with makeup air at a rate approximately equal to the exhaust air rate. 200 cubic feet per minute 300 cubic feet per minute 400 cubic feet per minute 500 cubic feet per minute 12. Condensate piping from cooling coils and evaporators must maintain a minimum horizontal slope __________ in the direction of discharge. 1/8 unit vertical in 12 units horizontal 1/4 unit vertical in 12 units horizontal 1/2 unit vertical in 12 units horizontal 3/4 unit vertical in 12 units horizontal 13. Clothes dryer exhaust ducts must be supported at max. intervals of __________ . 6 feet 12 feet 18 feet 24 feet 14. Gas-fired appliances must be provided with combustion air that complies with __________ . IRC - Chapter 24 manufacturer's installation instructions NFPA 31 NSFA 35 15. Natural draft gas vents serving wall furnaces must terminate at a min. elevation of __________ above the bottom of the furnace. 6 feet 12 feet 18 feet 24 feet 16. Freestanding or built-in ranges must have a min. vertical clearance above the cooking top of __________ to unprotected combustible material. 24 inches 30 inches 36 inches 42 inches 17. Hydronic piping systems must be tested hydrostatically at a pressure of 1 1/2 times the maximum system design pressure, but not less than 100 psi for a min. duration of __________. 10 minutes 15 minutes 20 minutes 25 minutes 18. Supply piping used in the installation of oil burners and appliances must be a min. of __________ pipe. 1/8-inch 1/2-inch 3/8-inch 1-inch 19. What is the max input rating of an unvented room heater? 20,000 Btu/h 40,000 Btu/h 60,000 Btu/h 80,000 Btu/h 20. 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