Three phase circuit MCQ with Answers

Three phase circuit MCQ with Answers

6) Which method is used for 3f power measurement when load is unbalanced?

Answer is:

Three watt meter method

7) What is the value of power factor when two watt meter readings are equal in 2 watt meter method of power measurement?

Answer is:

Unity

8) What is the reading in second watt meter W2 if the first watt meter reading is W1 = 100W at the p.f 0.5?

Answer is:

Zero

9) What is the formula for total power in three watt meter method of power measurement?

Answer is:

W1+W2+W3

10) Where two watt meter method of power measurement is used?

Answer is:

Balanced and unbalanced load