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Author Question: If electric heating elements are used in conjunction with a heat pump, when do they operate? A) ... (Read 90 times)

K@

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on: Jul 24, 2018
If electric heating elements are used in conjunction with a heat pump, when do they operate?
 
  A) The electric heating elements operate in the second stage.
  B) The electric heating elements operate simultaneously with the heat pump.
  C) The electric heating elements operate in the first stage.
  D) The electric heating elements operate whenever the heat pump is not operating.

Question 2

A silicon-controlled rectifier (SCR):
 
  A) Turns DC voltage to AC voltage.
  B) Turns AC voltage to DC voltage.
  C) Increases or decreases alternating current voltage.
  D) Can be turned on and off like an electronically controlled switch.


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memslove

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Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

D


K@

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Reply 2 on: Jul 24, 2018
Wow, this really help

robbielu01

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Reply 3 on: Yesterday
Gracias!

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