A transformer designed for operation at 60 Hz supply is working at 50 Hz supply system without changing its voltage and current ratings. Compared to the full load efficiency at 60 Hz, the full load transformer efficiency at 50 Hz.

MGVCL Exam Paper (30-07-2021 Shift 1)
A transformer designed for operation at 60 Hz supply is working at 50 Hz supply system without changing its voltage and current ratings. Compared to the full load efficiency at 60 Hz, the full load transformer efficiency at 50 Hz.

increases marginally

remains unaltered

increases by 30%

decreases marginally

increases marginally

remains unaltered

increases by 30%

decreases marginally

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MGVCL Exam Paper (30-07-2021 Shift 1)
A given solar cell has the following specifications:
Open-circuit voltage, Voc: 0.7 V
Short-circuit current, Isc: 3.5 A
Short-circuit current, Isc: 3.5 A
Short-circuit current, Isc: 3.5 A
If the solar cell operates at maximum power point, calculate the efficiency.

15.70%

13.70%

12.70%

14.70%

15.70%

13.70%

12.70%

14.70%

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MGVCL Exam Paper (30-07-2021 Shift 1)
Which of the following are the advantages of Aerial Bunched Cables (ABC)?

All of these

Higher safety and reliability

Reduced height of supports

Elimination of theft of energy

All of these

Higher safety and reliability

Reduced height of supports

Elimination of theft of energy

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MGVCL Exam Paper (30-07-2021 Shift 1)
In computer networks, the nodes are

the computer that originates data

all the mentioned above

the computer that terminates data

the computer that routes data

the computer that originates data

all the mentioned above

the computer that terminates data

the computer that routes data

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MGVCL Exam Paper (30-07-2021 Shift 1)
Consider the following statements and choose the correct option:
Statement 1: The magnitude of earth fault current for a given fault position within a winding depends upon the method of neutral grounding.
Statement 2: Earth fault protection for an electric motor is provided by means of instantaneous overcurrent relay.

Statement 1 is TRUE and Statement 2 is FALSE

Both Statement 1 and Statement 2 are FALSE

Both Statement 1 and Statement 2 are TRUE

Statement 1 is FALSE and Statement 2 is TRUE

Statement 1 is TRUE and Statement 2 is FALSE

Both Statement 1 and Statement 2 are FALSE

Both Statement 1 and Statement 2 are TRUE

Statement 1 is FALSE and Statement 2 is TRUE

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MGVCL Exam Paper (30-07-2021 Shift 1)
Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load.

425√3 VAR

325√3 VAR

425/√3 VAR

325/√3 VAR

425√3 VAR

325√3 VAR

425/√3 VAR

325/√3 VAR

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

MGVCL Exam Paper (30-07-2021 Shift 1) A transformer designed for operation at 60 Hz supply is working at 50 Hz supply system without changing its voltage and current ratings. Compared to the full load efficiency at 60 Hz, the full load transformer efficiency at 50 Hz.

MGVCL Exam Paper (30-07-2021 Shift 1) A given solar cell has the following specifications:Open-circuit voltage, Voc: 0.7 VShort-circuit current, Isc: 3.5 AShort-circuit current, Isc: 3.5 AShort-circuit current, Isc: 3.5 AIf the solar cell operates at maximum power point, calculate the efficiency.

MGVCL Exam Paper (30-07-2021 Shift 1) Which of the following are the advantages of Aerial Bunched Cables (ABC)?

MGVCL Exam Paper (30-07-2021 Shift 1) In computer networks, the nodes are

MGVCL Exam Paper (30-07-2021 Shift 1) Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load.

MGVCL Exam Paper (30-07-2021 Shift 1)
A transformer designed for operation at 60 Hz supply is working at 50 Hz supply system without changing its voltage and current ratings. Compared to the full load efficiency at 60 Hz, the full load transformer efficiency at 50 Hz.

MGVCL Exam Paper (30-07-2021 Shift 1)
Which of the following are the advantages of Aerial Bunched Cables (ABC)?

MGVCL Exam Paper (30-07-2021 Shift 1)
In computer networks, the nodes are

MGVCL Exam Paper (30-07-2021 Shift 1)
Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375 W and –50 W. Calculate the reactive power taken by the load.