A. line is energized
B. there is no current in the line
C. line is on full load
D. circuit breaker is not open
Related Mcqs:
- The power transmitted will be maximum when____________?
A. corona losses are minimum
B. reactance is high
C. sending end voltage is more
D. receiving end voltage is more - Transmission voltage of 11 kV is normally used for distances up to_____km?
A. 20—25 km
B. 40—50 km
C. 60—70 km
D. 80—100 km - Pin type insulators are generally not used for voltages beyond_________?
A. 1 kV
B. 11 kV
C. 22 kV
D. 33 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 - When the interconnector between two stations has large reactance?
A. the transfer of power will take place with voltage fluctuation and noise
B. the transfer of power will take place with least loss
C. the stations will fall out of step be¬cause of large angular displacement between the stations
D. none of the above - When a conductor carries more current on the surface as compared to core, it is due to___________?
A. permeability variation
B. corona
C. skin effect
D. unsymmetrical fault
E. none of the above - The phenomenon qf rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the________________?
A. Seeback effect
B. Ferranti effect
C. Raman effect
D. none of the above - The distributors for residential areas are______________?
A. single phase
B. three-phase three wire
C. three-phase four wire
D. none of the above - The spacing between phase conductors of a 220 kV line is approximately equal to________________?
A. 2 m
B. 3.5 m
C. 6 m
D. 8.5 m - For an overhead line, the surge impedance is taken as________________?
A. 20-30 ohms
B. 70—80 ohms
C. 100—200 ohms
D. 500—1000 ohms
E. none of the above
