In a dual-fuel heat pump, what operates when second stage heat calls?

A) the electric heat strips are energized to supplement the furnace
B) the heat pump starts and the furnace shuts off
C) both the heat pump and the furnace operate
D) the furnace starts and the heat pump shuts off


D

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To help prevent damaging the first winding, some circuits contain a timer that disconnects power to the motor if the second winding is not energized within a predetermined time. This timer is often called a(n) ____________________.

Fill in the blank(s) with the appropriate word(s).

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Sod is a small block or square of turf

Indicate whether the statement is true or false

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The silk, as it is taken from the cocoon, is called ________________________ silk and has to be boiled in a solution of soap and water to remove the gummy coating

Fill in the blank(s) with correct word

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What are the four main purposes of line boring?

What will be an ideal response?

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