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Electrician
Electrician Set-2
AC circuits
7

AC circuits MCQ with Answers

7) What will be the readings of two watt meters (W1& W2) in 3 phase power measurement, if the power factor is zero?

W1 & W2 both are positive reading

W1 is Positive and W2 is negative reading

W1 is equal to W2 but with opposite signs

Zero W1 is Positive reading, and W2 is negative reading

Answer is:

W1 is equal to W2 but with opposite signs

AC circuits MCQ with Answers

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Related AC circuits MCQ with Answers

8) What is the maximum value of voltage for 240 volt RMS?

240V

415V

339.5V

376.8V

Answer is:

339.5V

9) What is the phase displacement in a single phase AC circuit?

90 Degree

120 Degree

180 Degree

270 Degree

Answer is:

90 Degree

10) Calculate the line current of the 3 phase 415V 50 HZ supply for the balanced load of 3000 watt at 0.8 power factor is connected in star.

8.5 A

5.2 A

4.5 A

3.4 A

Answer is:

5.2 A

11) What is the power factor in a 3 phase power measurement of two wattmeters showing equal readings?

0

1

0.5

0.8

Answer is:

1

AC circuits MCQ with Answers

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