What is the most common manifold pressure for natural gas furnaces?

What will be an ideal response?


3.5 inches WC

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The lap seams in a PVC roof membrane are typically sealed by

A) heat welding. B) liquid adhesives. C) single-sided tape. D) double-sided tape. E) any one of the above.

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Conservation tillage systems are said to have all but one of the following advantages over conventional tillage systems

A) It involves the use of less toxic weed control practices. B) It reduces soil erosion. C) Its labor and energy requirements are lower. D) It encourages higher microbial population numbers in the soil. E) It increases the hydraulic conductivity of the soil.

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Hazardous materials include all of the following EXCEPT ________

A) Brake cleaner B) Engine oil C) Water D) Asbestos

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multileaf springs are fixed rate springs

a. true b. false

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