Overhead lines generally use__________________?

Related Mcqs:

1. High voltage transmission lines use__________________?

   A. suspension insulators
   B. pin insulators
   C. both A. and B.
   D. none of the above

2. Which of the following materials is used for overhead transmission lines ?

   A. Steel cored aluminium
   B. Galvanised steel
   C. Cadmium copper
   D. Any of the above

3. Overhead system can be designed for operation up to____________?

   A. 11 kV
   B. 33 kV
   C. 66 kV
   D. 400 kV

   Updated by: The Perfectionist

4. 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

5. Which of the following relays is used on long transmission lines?

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

6. Which of the following characteristics should the line supports for transmission lines possess?

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

7. 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 lines

8. Series capacitors on transmission lines are of little use when the load VAR requirement is___________?

   A. large
   B. small
   B. fluctuating
   D. any of the above

9. Which of the following are the constants of the transmission lines ?

   A. Resistance
   B. Inductance
   C. Capacitance
   D. All of the above

10. In transmission lines the cross-arms are made of________________?

    A. copper
    B. wood
    C. R.C.C.
    D. steel