Month: June 2018

A. exciters
B. series capacitors
C. shunt reactors
D. voltatre transformers

A. Circuit breakers
B. Isolators
C. Load break switch
D. Circuit breakers and load break switches

A. line is energized
B. there is no current in the line
C. line is on full load
D. circuit breaker is not open

A. Current only
B. Current and voltage
C. Current, voltage and frequency
D. Current, voltage, frequency and short time current

A. compensate for skin effect
B. neutralise proximity effect
C. reduce line inductance
D. increase the tensile strength

A. Using a guard ring
B. Grading the insulator
C. Using long cross arm
D. Any of the above
E. None of the above

A. current flows through the half cross-section of the conductor
B. portion of the conductor near the surface carries more current and core of the conductor carries less current
C. portion of the conductor near the surface carries less current and core of the conductor carries more cur¬rent
D. any of the above
E. none of the above

A. Ring bus-bar scheme
B. Single bus-bar scheme
C. Breaker and a half scheme
D. Main and transfer scheme

A. insulin
B. bitumen
C. varnish
D. no insulation is required

A. semi-circle
B. triangle
C. ellipse
D. catenary