This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: When do normally open relay contacts close? A) They cannot close because they are open contacts. ... (Read 152 times)

s.tung

  • Hero Member
  • *****
  • Posts: 577
on: Jul 24, 2018
When do normally open relay contacts close?
 
  A) They cannot close because they are open contacts.
  B) When the relay coil is energized
  C) When the relay coil is de-energized
  D) When they receive power

Question 2

What power source does a heater normally operate on?
 
  A) 300 V to 400 V B) 208 V to 240 V C) 150 V to 250 V D) 200 V to 240 V


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dpost18

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 24, 2018
Answer to Question 1

B

Answer to Question 2

B


s.tung

  • Member
  • Posts: 577
Reply 2 on: Jul 24, 2018
Gracias!

jamesnevil303

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

A close-up of the migrating snails. A close-up of the migrating snails.
Bonobos are close relatives of chimpanzees and of humans. Bonobos are close relatives of chimpanzees and of humans.
Close-up view of Pluto's mountains, frozen plains and hazes Close-up view of Pluto's mountains, frozen plains and hazes
A combination wrench has an open end at one end and a box end at the other end. A combination wrench has an open end at one end and a box end at the other end.
Use a rubber finger cot to cover an open wound on a finger. Use a rubber finger cot to cover an open wound on a finger.
Growth in Open Economies Growth in Open Economies
Video: Language Areas Animation

For a complete list of videos, visit our video library