Gas Chapter 11 Practice Exam With Correct Answers,2025,A+Graded

Gas Chapter 11 Practice Exam With Correct
Answers,2025,A+Graded.




A room contains two fuel burning appliances. The total btu input of both appliances is 125,000 BTU's. How
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many cubic feet are required for the room NOT to be considered confined space? - CORRECT ANSWER✔✔
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125,000/1000 = +50 6250 j j j




What is the maximum length of the flexible gas connector going to a furnace? - CORRECT ANSWER✔✔6'
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Given: A 75,000 btu furnace with three burners and a recommended manifold pressure of 3.5 in W.C.
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What size should the orifices be if the furnace is installed in Salt Lake? - CORRECT ANSWER✔✔44
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, When can a category I fan assisted furnace be connected to a masonry chimney? - CORRECT ANSWER✔✔7
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times rule
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What are the distances listed direct vent appliances must terminate from openings where combustion
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products can enter a building? - CORRECT ANSWER✔✔
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What are the materials that can be used for piping natural gas? - CORRECT ANSWER✔✔
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An 80,000 BTUH furnace is supplied with 890 DTU/Cu. Ft. gas. How many cubic feet of gas are required per
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hour? - CORRECT ANSWER✔✔80,000/890=89.88
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If a building is not of unusually tight construction, what is the minimum volume of unconfined space that will
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be required for an 80,000 BTU furnace and a 35,000 btu water heater? - CORRECT ANSWER✔✔(total
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btu/1000)/50=5750
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What is the maximum length of a clothes dryer vent and where can it NOT be connected to? - CORRECT
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ANSWER✔✔35'
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What metals are permissible to use for combustion air ducts? - CORRECT ANSWER✔✔
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What is the free area of a wood girll? - CORRECT ANSWER✔✔25%
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If a closet has a 30,000 btu water heater and a 100,000 btu furnace what is the minimum duct size that would
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satisfy the code? - CORRECT ANSWER✔✔100,000/3000 7X7
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What is the maximum amount you can up-size a vent connector over the size of the draft hood outlet? -
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CORRECT ANSWER✔✔
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