1. If the conductor diameter decreases, inductance of the line,
- increases
- decreases
- remaining same
- cannot be determined
Answer: 1
2. A conductor carries more current on the surface as compared to core. This is called as
- Permeability
- Corona effect
- Skin effect
- Unsymmetrical fault
Answer: 3
3. The inductance of a line is minimum when,
- GMD is high
- GMR is high
- GMD and GMR are high
- GMD is low and GMR is high
Answer: 4
4. The economic size of a conductor is determined by,
- Kelvin’s law
- Kirchoff’s law
- Faraday’s law
- All of the above
Answer: 1
5. Skin effect depends upon,
- Supply frequency
- Size of conductor
- Nature of material
- All of the above
Answer: 4
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6. The DC resistance of conductor is less than AC resistance due to,
- Skin effect
- Proximity effect
- Both
- None
Answer: 3
7. For increasing the capacity of a transmission line, to transmit power,which of the following must be decreased.
- Voltage
- Line inductance
- Capacitance
- All
Answer: 2
8. Use of bundled conductor increases,
- GMR
- GMD
- Potential gradient
- Radius of conductor
Answer: 1
9. Which of the following is not a standard transmission voltage.
- 400 KV
- 11 KV
- 190 KV
- 750 KV
Answer: 3
10. The overall diameter ‘D’of a standard conductor is given in terms of diameter of each strand ‘d’ and no. of layers ‘n’ as,
- D = 2(n-1)d
- D = 2n-1/d
- D = 2(2n-1)d
- D = 2(n-D)d
Answer: 3
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