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.Management Sciences
Category: Transmission and Distribution
Pin type insulators are generally not used for voltages beyond_________?
0
A. 1 kV
B. 11 kV
C. 22 kV
D. 33 kV
The underground system cannot be operated above_________________?
A. 440 V
B. 11 kV
C. 33 kV
D. 66 kV
In a tap changing transformer, the tappings are provided on__________?
A. primary winding
B. secondary winding
C. high voltage winding
D. any of the above
The presence of ozone due to corona is harmful because it________________?
A. reduces power factor
B. corrodes the material
C. gives odour
D. transfer energy to the ground
E. none of the above
The material commonly used for sheaths of underground cables is______________?
A. lead
B. rubber
C. copper
D. iron
The operating voltage of extra high tension cables is upto_______________?
A. 6.6 kV
B. 11 kV
C. 33 kV
D. 66 kV
E. 132 kV
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
Most of the high transmission lines in Pakistan are_______________?
A. underground
B. overhead
C. either of the above
D. none of the above
Multicore cables generally use________________?
A. square conductors
B. circular conductors
C. rectangular conductors
D. sector-shaped conductors
E. none of the above
For transmission of power over a distance of 200 km, the transmission voltage should be_________kv?
A. 132 kV
B. 66 kV
C. 33 kV
D. 11 kV
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