Due to which of the following reasons the cables should not be operated too hot?
A. The oil may loose its viscosity and it may start drawing off from higher levels
B. Expansion of the oil may cause the sheath to burst
C. Unequal expansion may create voids in the insulation which will lead to ionization
D. All of the above
Answer: Option D
This Question Belongs to Electrical Engineering >> Transmission And Distribution
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
A. Static condenser
B. Synchronous condenser
C. Tap changing transformer
D. Booster transformer
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
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
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