Power Systems Lightning arresters are made up of which material? silicon oxide any of the above copper silver silicon oxide any of the above copper silver ANSWER DOWNLOAD EXAMIANS APP
Power Systems A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage? 36 kV 32 kV 40 kV 45 kV 36 kV 32 kV 40 kV 45 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with 2nd harmonic current. 7th harmonic current. 5th harmonic current. 3rd harmonic current. 2nd harmonic current. 7th harmonic current. 5th harmonic current. 3rd harmonic current. ANSWER DOWNLOAD EXAMIANS APP
Power Systems For large plants of capacity for more than 15 MW, what type of cooling is used Liquid. Hydrogen. Water. Air. Liquid. Hydrogen. Water. Air. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator. In order to produce power at 50 Hz, the numbers of pole are required in the generator 6. 12. 24. 16. 6. 12. 24. 16. ANSWER DOWNLOAD EXAMIANS APP
Power Systems With reference to hydrometer station, the graphical representation of the discharge as function of time is known as Hectograph. Monograph. Load duration curve. Hydro-graph. Hectograph. Monograph. Load duration curve. Hydro-graph. ANSWER DOWNLOAD EXAMIANS APP
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