2024 ICC M2 Commercial Mechanical Inspector Exam Quiz Welcome to your free 2024 ICC M2 Commercial Mechanical Inspector Exam Quiz REQUIRED - Enter your email address to receive a printable copy of your test results. 1. Appliances installed in a commercial parking garage must be installed so that all burners and ignition devices are located at least ________ above the floor. 18 inches 48 inches 10 feet 8 feet None 2. When mechanical equipment is located on a flat roof, a guardrail is required if the equipment requires service and is located within ________ of the roof edge. 3 feet 5 feet 6 feet 10 feet None 3. What is the minimum required depth for a secondary (auxiliary) drain pan placed under cooling equipment to catch condensate overflow? 1 inch 1.5 inches 2 inches 3 inches None 4. Outdoor air intake openings must be located at least ________ horizontally from any hazardous or noxious contaminant source, such as a plumbing vent or exhaust fan discharge. 3 feet 5 feet 10 feet 15 feet None 5. In a commercial building, when is a mechanical exhaust system permitted to be routed into a return air plenum? Only if the plenum is fully ducted Only if a fire damper is installed at the connection Only in Group B (Business) occupancies Never; exhaust systems must discharge to the outdoors None 6. A Type I commercial kitchen hood must be installed above equipment that produces: Heat and moisture only Grease or smoke Steam (such as commercial dishwashers) Carbon monoxide None 7. What is the minimum required clearance between a Type I commercial kitchen exhaust hood and combustible materials? 3 inches 6 inches 12 inches 18 inches None 8. Hazardous exhaust systems must be structurally independent of other building systems and must operate at a: Positive pressure relative to the surrounding spaces Negative pressure relative to the surrounding spaces Neutral pressure Static pressure of 2.0 inches water column None 9. Commercial clothes dryer exhaust ducts must be constructed of: Rigid galvanized steel or aluminum Flexible aluminum ducting PVC piping Minimum 0.016-inch-thick rigid metal, strictly avoiding aluminum None 10. Materials exposed within a duct or plenum must have a maximum flame spread index of ________ and a maximum smoke-developed index of ________. 25 ; 50 50 ; 100 75 ; 150 100 ; 200 None 11. Flexible air ducts (not connectors) used in a commercial system are limited to a maximum length of: 5 feet 10 feet 14 feet There is no maximum length for flexible air ducts, only for flexible connectors. None 12. When a commercial HVAC duct penetrates a fire-resistance-rated wall (such as a 2-hour fire barrier), what must generally be installed? A smoke detector inside the duct A fire damper A flexible connector to absorb expansion A cleanout door None 13. When providing combustion air to a commercial boiler room from the outdoors using the two-opening method, each opening must have a free area of 1 square inch per ________ Btu/h of total input rating. 2,000 3,000 4,000 5,000 None 14. A draft hood-equipped appliance requires venting. What is the minimum required upward slope for the horizontal portion of its vent connector? 1/8 inch per foot 1/4 inch per foot 1/2 inch per foot 1 inch per foot None 15. Refrigerant classifications are based on toxicity and flammability. Which classification represents the lowest toxicity and lowest flammability (the safest)? A1 A3 B1 B3 None 16. Doors to a commercial refrigeration machinery room must be tight-fitting and must: Slide horizontally Swing inward into the machinery room Swing outward from the machinery room Be constructed of solid glass None 17. Before a new hydronic (water) piping system is put into service, it must be hydrostatically tested. The test pressure must be at least 1.5 times the maximum system design pressure, but not less than: 50 psi 80 psi 100 psi 150 psi None 18. Which of the following pipe fittings is PROHIBITED to be installed in a concealed location (like inside a finished wall) in a commercial fuel gas system? Threaded elbows Brazed fittings Welded fittings Threaded unions None 19. When pressure testing a commercial gas pipe system, the test duration must be at least 1/2 hour for each 500 cubic feet of pipe volume, but the minimum test duration for any system shall not be less than: 10 minutes 15 minutes 30 minutes 60 minutes None 20. Gas meters shall be protected from vehicular damage and must be located at least ________ away from sources of ignition (like a functioning HVAC unit). 1 foot 3 feet 5 feet 10 feet None Prove you are human Time is Up!
