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Author Question: Most switches used for safety controls in HVACR circuits: A) Are normally closed and wired in ... (Read 140 times)

sheilaspns

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on: Jul 27, 2018
Most switches used for safety controls in HVACR circuits:
 
  A) Are normally closed and wired in series with the load they protect.
  B) Are normally open and wired in parallel with the load they protect.
  C) Are normally closed and wired in parallel with the load they protect.
  D) Are normally open and wired in series with the load they protect.

Question 2

The simplest plasma arc cutting units use filtered _____.
 
  a. carbon dioxide
  b. nitrogen
  c. compressed air
  d. helium


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lauravaras

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

c


sheilaspns

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Reply 2 on: Jul 27, 2018
Excellent

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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