Moderate
In order that current should flow without causing excessive heating or voltage drop, the relay contacts should_________________?
Correct answer: D. have all above properties
- A. have low contact resistance
- B. be clean and smooth
- C. be of sufficient size and proper shape
- D. have all above properties
Explanation
Relay contacts should have low resistance, clean and smooth surfaces, and adequate size and shape to carry current without excessive heating or voltage drop. Therefore, all the stated properties are required.
Last updated
Practise Power Systems
334 free Power Systems MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.