Power Systems The insulation of the modern EHV lines is designed based on R × I. corona. the lighting voltage. the switch voltage. R × I. corona. the lighting voltage. the switch voltage. ANSWER DOWNLOAD EXAMIANS APP
Power Systems When reactance grounding is used in network, the voltage between neutral and ground is IR0 × Xn IN × Xn both 1 and 3 3×IR0 × Xn IR0 × Xn IN × Xn both 1 and 3 3×IR0 × Xn ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has a surge impedance of 400 Ω for a length of the line of 200 km. If the length of line is increased to 400 km, then its surge impedance is 400 Ω 200 Ω 0 Ω 800 Ω 400 Ω 200 Ω 0 Ω 800 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator? 0.1 0.001 1000 10 0.1 0.001 1000 10 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The load duration curve for a system is 8 hours 30 MW, 16 hours 25 MW and 24 hours 20 MW. The load factor will be 0.44. 1.3. 0.25. 0.83. 0.44. 1.3. 0.25. 0.83. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is 25 Ω 500 Ω 250 Ω 1000 Ω 25 Ω 500 Ω 250 Ω 1000 Ω ANSWER DOWNLOAD EXAMIANS APP
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