1.
In a distribution system, __________ causes lamps to burn out permanently and may cause failure of other appliances.
A
Low permittivity
B
High resistance
C
High voltage
D
Low voltage
Answer and explanation
Correct Answer: C — High voltage
The correct answer is C: High voltage.
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A good distribution system requires a proper voltage level at the consumer terminal.
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Voltage variations at the consumer terminal must be kept as low as possible.
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Changes in voltage are generally caused by variation of load on the system.
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High voltage causes lamps to burn out permanently and may cause failure of other appliances.
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The permissible voltage variation is ±5% of the rated voltage.