Transmission and Distribution

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

A. 20—25 km
B. 40—50 km
C. 60—70 km
D. 80—100 km

A. Low cost
B. High mechanical strength
C. Longer life
D. All of the above

A. Radial system
B. Tree system
C. Ring main system
D. All are equally reliable

A. alloy steel
B. stainless steel
C. mild steel
D. high speed steel
E. all of the above

A. Impedance relay
B. Mho’s relay
C. Reactance relay
D. None of the above