MGVCL EXAM PAPER (30-07-2021 SHIFT 3) QUIZ

A single phase full converter bridge, connected to 230 V, 50 Hz source is feeding a load R =10 Ω in series with a large inductance that makes the load current ripple free. For a firing angle of 450, calculate the rectification efficiency.

76.66%

28.33%

63.66%

50.55%

TRUE ANSWER : ?
YOUR ANSWER : ?

If a cable of homogeneous insulation has maximum stress of 6 kV/mm, then the dielectric strength of insulation should be ____

12 kV/mm

1.5 kV/mm

6 kv/mm

3 kV/mm

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YOUR ANSWER : ?

____ is the rms value of AC component of the current in the pole at the instant of contact separation.

Making current

Asymmetrical breaking current

Symmetrical short circuit current

Symmetrical breaking current

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YOUR ANSWER : ?

The magnetizing inrush current in a transformer is rich in the harmonic component.

third

seventh

second

fifth

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Murray loop test is performed on a faulty cable 300 m long. At balance, the resistance connected to the faulty core was set at 20 Ω and the resistance of the resistor connected to the sound core was 40 Ω. Calculate the distance of the fault point from the test end.

100 m

400 m

200 m

300 m

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YOUR ANSWER : ?

વિષમ' ની સંધી છૂટી પાડો. - કયો વિકલ્પ સાચો છે?

વિસ્ + અમ

વી + સમ

વીસ + અમ

વિ + સમ

TRUE ANSWER : ?
YOUR ANSWER : ?

The miniature circuit breaker (MCB) with ____ trip characteristics trips instantaneously when the current flowing through it reaches between 10 to 20 times the rated current.

Class D

Class Z

Class B

Class C

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YOUR ANSWER : ?

Which among these components connects to physical equipments of the distribution system?

None of these

Remote Terminal Unit

Communication infrastructure

Central control room with host computers

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The complex power injections at a bus are shown in figure Two lines connected drawing the powers as shown in figure. The complex power in the line-2 "S2" is

2-j5

2+j5

2+j1

2-j1

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YOUR ANSWER : ?

The maximum value of power factor is and it exists in a pure circuit.

1, inductive

0.866, resistive

0.866, inductive

1, resistive

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YOUR ANSWER : ?

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