What components are added to make a two stage furnace?

A) Electric heat strips and a second stage sequence
B) An extra set of burners and an extra gas valve
C) A second heat exchanger and an electric vent gas damper
D) A two stage gas valve, two draft proving switches, and a two speed induced draft fan


D

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The additive that will MOST-Likely neutralize battery acid is:

A. brake fluid B. baking soda C. water D. salt

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If a transformer has a ratio of 10 to 1 (10:1), it is being used as a ____ transformer.

A. step-up B. step-down C. buck-boost D. tapped

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Technician A says the held member of a planetary gearset is called the drive member. Technician B says the held member of a planetary gearset is called the reaction member. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B

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A boot in a duct system is used ____.

A. at the plenum B. between the trunk duct and the branch duct C. between the branch duct and the register D. to eliminate vibration between the unit and the duct

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