Where located on a roof with a 5:12 slope, a level platform shall be provided along the access panel of the furnace at least _____ inches wide.

• A.[option text not fully visible in the material you sent]
• B.24
• C.30
• D.36

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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.

• A.1
• B.2
• C.4
• D.5

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The minimum dimension for rectangular air ducts used to supply combustion air for natural draft systems is
_____ inches.

• A.2
• B.3
• C.4
• D.6

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Termination of vents for appliances listed for and installed outdoors that incorporate integral venting shall:

• A.terminate not less than 5 feet vertically above the lowest connected appliance draft hood outlet or flue collar.
• B.terminate not less than 5 feet vertically above the highest connected appliance draft hood outlet or flue collar.
• C.be installed in accordance with their listings and the manufacturer's installation instructions.
• D.be installed in accordance with the design professional's plans as approved by the local building official.

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The exhibit shows a _____ in. diameter gas line between unit heaters 5 and 8.

• A.3/4
• B.1
• C.1-1/8
• D.1-1/4

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