| 1. | Which of the following is the main advantage of AC. transmission system over D.C. transmission system ? | |
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Less instability problem
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Less insulation problems
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Easy transformation
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Less losses in transmission over long distances
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Report Question| 2. | Corona results in ? | |
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radio interference
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power factor improvement
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better regulation
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none of the above
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| 3. | The effect of ice on transmission line conductors is to increase the ? | |
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transmission losses
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weight of the conductor
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tendency for corona
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resistance to flow of current
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| 4. | In a distribution system major cost is that of ? | |
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earthing system
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distribution transformer
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conductors
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meters
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| 5. | A gay wire ? | |
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protects conductors against short circuiting
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provides emergency earth route
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provides protection against surges
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supports the pole
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| 6. | In medium transmission lines the shunt capacitance is taken into account in ? | |
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T-method
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n-method
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steinmetz method
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all of the above
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| 7. | To increase the capacity of a transmission line for transmitting power which of the following must be decreased ? | |
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Capacitance
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Line inductance
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Voltage
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All of the above
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| 8. | The effect of wind pressure is more predominant on ? | |
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supporting towers
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neutral wires
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transmission lines
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insulators
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| 9. | Skin effect is noticeable only at frequencies ? | |
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audio
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low
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high
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all
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| 10. | In which of the following voltage regulators the effect of dead zero is found ? | |
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Electromagnetic type
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Magnetic amplifier
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Electronic type using integrated circuits
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All of the above
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