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Electrician Set-2
AC circuits
14

AC circuits MCQ with Answers

14) Calculate the value admittance (Y) of the RLC parallel circuit connected across 240volts/50Hz AC supply and 8 Amp. Current is passed through it ?

3.33 Mho

0.33 Mho

0.033 Mho

0.003 Mho

Answer is:

0.033 Mho

AC circuits MCQ with Answers

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Related AC circuits MCQ with Answers

15) How the low power factor (P.F) can be improved in AC circuits?

By connecting resistors in series

By connecting capacitors in series

By connecting inductors in series

By connecting capacitors in parallel

Answer is:

By connecting capacitors in parallel

16) What is the purpose of phase sequence meter?

To control the speed of 3 phase motor

To protect motor against short circuit fault

To indicate the incorrect phase sequence of 3 phase

To ensure the correct phase sequence of 3 phase system

Answer is:

To ensure the correct phase sequence of 3 phase system

17) Calculate the apparent power of a star connected 3 phase load, if it is connected across 3 phase 415volt/50Hz supply at 0.8 p.f and the phase current is 10 Amps

12.45 KVA

57.50 KVA

3.320 KVA

7.188 KVA

Answer is:

7.188 KVA

18) What is the P.F if one of the wattmeters reading is zero and the other reads total power in 2 wattmeter method of 3 phase power measurement?

0.5

Zero

Unity

Below 0.5

Answer is:

0.5

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