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| Section | Weight | Objectives |
|---|---|---|
| General Administration | 18% | - Code authority and enforcement - Plan review and documentation - Permits and inspections - Manufacturer's instructions and listings |
| Duct Systems | 12% | - Dampers and access doors - Duct construction and materials - Insulation and sealing - Duct installation and supports |
| Heating, Cooling & Water Heaters | 18% | - Solar thermal systems - Heat pumps and cooling equipment - Water heaters and storage tanks - HVAC equipment installation and clearance - Boilers and hydronic systems |
| Combustion Air | 8% | - Confined spaces and equipment rooms - Air supply and venting - Combustion air requirements |
| Fuel Supply Systems | 10% | - Pressure regulation and overpressure protection - Piping testing and inspection - Gas appliances and connections - Fuel gas piping materials and installation |
| Exhaust & Ventilation Systems | 20% | - Commercial kitchen exhaust systems - Ventilation rates and outdoor air requirements - Hazardous and special exhaust systems - Makeup air systems |
| Chimneys & Vents | 14% | - Factory-built chimneys and vents - Vent systems and connections - Clearances and termination requirements - Chimney construction and materials |
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NEW QUESTION # 46
Supports for hazardous exhaust duct shall be constructed of:
Answer: A
Explanation:
Hazardous exhaust systems are regulated under the IMC provisions for special exhaust because they handle potentially dangerous fumes, vapors, dusts, or other contaminants. The code requires the duct system and its support components to be suitable for that hazard level, and supports for hazardous exhaust duct must be constructed of noncombustible material . That is why Option C is correct. Plastic and fibrous supports would not satisfy the required fire and safety performance, and UL 181 applies to certain factory-made air ducts and connectors, not as the governing support-material rule for hazardous exhaust duct supports.
NEW QUESTION # 47
Air mechanically exhausted from a room must be:
Answer: C
Explanation:
The IMC requires air removed by a mechanical exhaust system to be discharged outdoors to an approved location and not be readily drawn back into the building. That makes D correct. The code does not permit general exhaust air to terminate in an attic, and it does not make filtering or recirculation the default rule for mechanically exhausted air.
NEW QUESTION # 48
The exhibit shows a _____ in. diameter gas line between unit heaters 5 and 8.
Answer: A
Explanation:
Based on the mechanical plan shown in the exhibit, the gas line between unit heaters 5 and 8 is labeled as 1 inch in diameter. Therefore, the correct answer is B.
NEW QUESTION # 49
Floor furnaces shall not be closer than _____ inches to the ground.
Answer: B
Explanation:
The ICC mechanical code requires the lowest portion of a floor furnace to have not less than 6 inches (152 mm) clearance from grade level . Therefore, the correct choice is the option corresponding to 6 inches , which is C based on your answer set.
NEW QUESTION # 50
Given: single-wall vent, which serves only one appliance, and has a height of 10 feet.
The maximum horizontal length permitted for a 5-inch diameter vent connector serving this vent is _____ feet.
Answer: A
Explanation:
For a single-wall vent connector serving one appliance, the maximum horizontal length is determined from the vent connector sizing and length rules. For a 5-inch diameter connector with a 10-foot vent height , the permitted maximum horizontal length is 7.5 feet . Therefore, Option B is correct.
NEW QUESTION # 51
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