Stability of power system can be improved by<br/>1. Reducing voltage of transmission<br/>2. Using parallel transmission lines<br/>3. Using series compensators<br/>Which of the above statements are correct?

MGVCL Exam Paper (30-07-2021 Shift 1)
Stability of power system can be improved by
1. Reducing voltage of transmission
2. Using parallel transmission lines
3. Using series compensators
Which of the above statements are correct?

1 and 3 only

All 1, 2 and 3

1 and 2 only

2 and 3 only

1 and 3 only

All 1, 2 and 3

1 and 2 only

2 and 3 only

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MGVCL Exam Paper (30-07-2021 Shift 1)
A balanced delta connected load of 8+j6 Ω per phase is connected to a 415 V, 50 Hz, 3-phase supply lines. If the input power factor is improved to 0.9 by connecting a star connected capacitor bank, then the required kVAR of the bank is

8.98 kVAR

16.98 kVAR

14.98 kVAR

10.98 kVAR

8.98 kVAR

16.98 kVAR

14.98 kVAR

10.98 kVAR

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MGVCL Exam Paper (30-07-2021 Shift 1)
In a 3-phase, 4-wire, 400/230 V system, a lamp (L1) of 100 W is connected to one phase and neutral and a lamp (L2) of 150 W is connected to the second pahse and neutral. If the neutral wire is disconnected accidently, what will be the voltage across a 100 W lamp (L1)?

120V

240V

180V

160 V

120V

240V

180V

160 V

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MGVCL Exam Paper (30-07-2021 Shift 1)
A given solar cell has the following specifications: Isc = 4 A and Voc = 0.7 V. Consider that 20 identical cells with the above specifications are to be interconnected to create a PV module. What is the open-circuit voltage of the PV module if all the solar cells are connected in a series configuration?

12.6 V

0.7 V

11.2 V

14 V

12.6 V

0.7 V

11.2 V

14 V

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MGVCL Exam Paper (30-07-2021 Shift 1)
___ is the rms value of the total current comprising the AC and DC components of the current in the circuit breaker pole at the instant of contact separation.

Making current

Symmetrical breaking current

Asymmetrical breaking current

Symmetrical short circuit current

Making current

Symmetrical breaking current

Asymmetrical breaking current

Symmetrical short circuit current

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MGVCL Exam Paper (30-07-2021 Shift 1)
Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___

Whether the oil test indicates moisture

Turns ratio values

Condition of paper insulation (change in watts losses)

Movement of the windings (change in capacitance)

Whether the oil test indicates moisture

Turns ratio values

Condition of paper insulation (change in watts losses)

Movement of the windings (change in capacitance)

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MGVCL Exam Paper (30-07-2021 Shift 1)

MGVCL Exam Paper (30-07-2021 Shift 1) Stability of power system can be improved by1. Reducing voltage of transmission2. Using parallel transmission lines3. Using series compensatorsWhich of the above statements are correct?

MGVCL Exam Paper (30-07-2021 Shift 1) A balanced delta connected load of 8+j6 Ω per phase is connected to a 415 V, 50 Hz, 3-phase supply lines. If the input power factor is improved to 0.9 by connecting a star connected capacitor bank, then the required kVAR of the bank is

MGVCL Exam Paper (30-07-2021 Shift 1) ___ is the rms value of the total current comprising the AC and DC components of the current in the circuit breaker pole at the instant of contact separation.

MGVCL Exam Paper (30-07-2021 Shift 1) Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___

MGVCL Exam Paper (30-07-2021 Shift 1)
Stability of power system can be improved by
1. Reducing voltage of transmission
2. Using parallel transmission lines
3. Using series compensators
Which of the above statements are correct?

MGVCL Exam Paper (30-07-2021 Shift 1)
A balanced delta connected load of 8+j6 Ω per phase is connected to a 415 V, 50 Hz, 3-phase supply lines. If the input power factor is improved to 0.9 by connecting a star connected capacitor bank, then the required kVAR of the bank is

MGVCL Exam Paper (30-07-2021 Shift 1)
___ is the rms value of the total current comprising the AC and DC components of the current in the circuit breaker pole at the instant of contact separation.

MGVCL Exam Paper (30-07-2021 Shift 1)
Insulation Power Factor testing on an oil-filled transformer is not helpful in determining ___