SSC JE Electrical Engineering 2011
For the following questions answer them individually
SSC JE Electrical Engineering 2011 - Question 131
If the speed of a universal motor in AC operation is $$N_{AC}$$ and in DC operation is $$N_{DC}$$, (and I = current, V = supply voltage, r = resistance, X = reactance, $$\cos \phi$$ = power factor) then the speed ratio
SSC JE Electrical Engineering 2011 - Question 132
Sheaths are used in underground cables to
SSC JE Electrical Engineering 2011 - Question 133
If the frequency of a transmission system is changed from 50 Hz to 100 Hz, the string efficiency
SSC JE Electrical Engineering 2011 - Question 134
The power station where coal is used as a fuel is called
SSC JE Electrical Engineering 2011 - Question 135
Making capacity of a circuit breaker is equal to
SSC JE Electrical Engineering 2011 - Question 136
A power insulator has 4 units. The voltage across the bottom-most unit is 33.33% of the total voltage. Its string efficiency is
SSC JE Electrical Engineering 2011 - Question 137
Load factor for the load duration curve shown below is
SSC JE Electrical Engineering 2011 - Question 138
Resistance switching is normally employed in
SSC JE Electrical Engineering 2011 - Question 139
Which one is the disadvantage of oil when used as an arc extinguishing medium in the oil circuit breaker
SSC JE Electrical Engineering 2011 - Question 140
If the discharge voltage of a thyrite arrester is 373 kV rms and the rated voltage is 211kV rms, the discharge factor of the arrester is
