Author Question: Most switches used for safety controls in HVAC circuits: A) Are normally open and wired in ... (Read 129 times)

Evvie72

  • Hero Member
  • *****
  • Posts: 519
Most switches used for safety controls in HVAC circuits:
 
  A) Are normally open and wired in parallel with the load they protect.
  B) Are normally closed and wired in parallel with the load they protect.
  C) Are normally closed and wired in series with the load they protect.
  D) Are normally open and wired in series with the load they protect.

Question 2

One advantage relay logic systems have over solid-state logic systems is that:
 
  A) They can control more functions. B) They consume less power.
  C) They are not affected by noisy power signals. D) They are faster.



amcvicar

  • Sr. Member
  • ****
  • Posts: 341
Answer to Question 1

C

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

For a complete list of videos, visit our video library