Average resistance of human body is

A. 500 ohms
B. 1000 ohms
C. 1500 ohms
D. 2000 ohms

Answer: Option B

about 10,000 ohms
Human resistance is about 10,000 ohms on the high side and as little as 1,000 ohms if the person is wet. Remember, ohms is the unit of measure of a material's resistance or impedance to current flow.

====End of mcqs_earthing_or_grounding (Page -1)====

Farady prefabricated compact transformers (Pict -7),
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Components of an electrical substation site (Pict -8),
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Engine Control Room (Pict -9),
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#mcqs_transmission_and_distribution (Page -1),
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Overhead system can be designed for operation up to

A. 11 kV
B. 33 kV
C. 66 kV
D. 400 kV

Answer: Option D

The underground system cannot be operated above 66 kV because of insulation difficulties but overhead system can be designed for operation up to 400 kV or higher even.
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By which of the following a bus-bar is rated?

A. Current only
B. Current and voltage
C. Current, voltage and frequency
D. Current, voltage, frequency and short time current

Answer: Option D

The frequency of voltage generated, in case of generators, can be increased by

A. Using reactors
B. Increasing the load
C. Adjusting the governor
D. Reducing the terminal voltage

Answer: Option C

In aluminium conductors, steel core is provided to

A. Compensate for skin effect
B. Neutralise proximity effect
C. Reduce line inductance
D. Increase the tensile strength

Answer: Option D
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A 3-phase 4-wire system is commonly used on

A. Primary transmission
B. Secondary transmission
C. Primary distribution
D. Secondary distribution

Answer: Option D

Which of the following is usually not the generating voltage?

A. 6.6 kV
B. 8.8 kV
C. 11 kV
D. 13.2 kV

Answer: Option B
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When the interconnector between two stations has large reactance

A. The transfer of power will take place with voltage fluctuation and noise
B. The transfer of power will take place with least loss
C. The stations will fall out of step because of large angular displacement between the stations
D. None of the above

Answer: Option C

====End of mcqs_transmission_and_distribution (Page -1)====

Electric Pole (Pict -10),
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Enhancing Transmission Line Performance:
Using Simulation to Optimize Design (Pict -11),
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Current Transformer (Pict -12),
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Capacitor Voltage Transformers (Pict -13),
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The size of the earth or ground wire is based on the

A. maximum fault current carrying through the ground wire
B. rated current carrying capacity of the service line
C. depends on the soil resistance
D. both (A) and (C)

Answer: Option D

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