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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Fuel Supply Systems | 10% | - Gas appliances and connections - Fuel gas piping materials and installation - Pressure regulation and overpressure protection - Piping testing and inspection |
| Topic 2: Chimneys & Vents | 14% | - Vent systems and connections - Clearances and termination requirements - Factory-built chimneys and vents - Chimney construction and materials |
| Topic 3: Exhaust & Ventilation Systems | 20% | - Hazardous and special exhaust systems - Ventilation rates and outdoor air requirements - Commercial kitchen exhaust systems - Makeup air systems |
| Topic 4: Combustion Air | 8% | - Combustion air requirements - Air supply and venting - Confined spaces and equipment rooms |
| Topic 5: Heating, Cooling & Water Heaters | 18% | - Heat pumps and cooling equipment - Solar thermal systems - HVAC equipment installation and clearance - Water heaters and storage tanks - Boilers and hydronic systems |
| Topic 6: Duct Systems | 12% | - Dampers and access doors - Insulation and sealing - Duct construction and materials - Duct installation and supports |
| Topic 7: General Administration | 18% | - Permits and inspections - Manufacturer's instructions and listings - Plan review and documentation - Code authority and enforcement |
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NEW QUESTION # 12
Indoor combustion air shall be provided within:
Answer: A
Explanation:
For indoor combustion air openings, one opening must commence within 12 inches of the top of the enclosure and one within 12 inches of the bottom . That corresponds to 1 foot of the ceiling and 1 foot of the floor , so Option A is correct.
NEW QUESTION # 13
An 8-inch Type B venting system with a listed vent cap must terminate a minimum of _____ feet above the flat roof through which it passes.
Answer: D
Explanation:
For a Type B gas vent with a listed vent cap terminating through a flat roof , the minimum required termination height is 1 foot above the roof . That makes Option A correct. This is consistent with gas vent termination tables used with listed Type B vent systems and the code framework for Type B vent terminations.
NEW QUESTION # 14
Given: An industrial water heater boiler has a manufacturer's listing of 18 inches wall clearance. It is installed with a protective wall assembly of 24-gauge sheet metal spaced out 1 inch from the wall.
The reduced installation clearance from the wall for this appliance is _____ inches.
Answer: A
Explanation:
ICC clearance-reduction tables allow a listed clearance of 18 inches to be reduced to 9 inches where 24- gauge sheet metal is installed with a 1-inch ventilated airspace from the combustible wall. Therefore the correct answer is the option corresponding to 9 inches , which is B in your set.
NEW QUESTION # 15
Ducts shall not be permitted to be connected to:
Answer: B
Explanation:
The IMC appliance provisions prohibit duct connection to a vented wall furnace . That makes Option B correct. The exam tests recognition of appliance-specific distribution restrictions rather than general duct rules.
NEW QUESTION # 16
Unless listed for a greater or smaller dimension, mechanical draft venting systems shall terminate a minimum of _____ feet below an openable window.
Answer: D
Explanation:
For mechanical draft venting systems, unless the appliance is listed for a different clearance, the vent terminal must be located not less than 4 feet below , 4 feet horizontally from , or 1 foot above any door, operable window, or gravity air inlet into a building. Therefore, the required minimum distance below an openable window is 4 feet , so Option B is correct.
NEW QUESTION # 17
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