By which of the following a bus-bar is rated?
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
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A conductor, due to sag between two supports, takes the form of____________?
A conductor, due to sag between two supports, takes the form of____________?
A. semi-circle
B. triangle
C. ellipse
D. catenaryIn the analysis of which of the following lines shunt capacitance is neglected?
In the analysis of which of the following lines shunt capacitance is neglected?
A. Short transmission lines
B. Medium transmission lines
C. Long transmission lines
D. Medium as well as long transmission linesTransmission voltage of 11 kV is normally used for distances up to_____km?
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 kmShort transmission line: 0-20 kv, 0-50 km.
Medium transmission line: 20-100 kv, 50-150 km.
Long transmission line: above 100 kv and 150 kmBy which of the following methods string efficiency can be improved?
By which of the following methods string efficiency can be improved?
A. Using a guard ring
B. Grading the insulator
C. Using long cross arm
D. Any of the above
E. None of the aboveWhich of the following methods is used for laying of underground cables ?
Which of the following methods is used for laying of underground cables ?
A. Direct laying
B. Draw-in-system
C. Solid system
D. All of the aboveThe spacing between phase conductors of a 220 kV line is approximately equal to________________?
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