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

Related Mcqs:

1. For transmission of power over a distance of 200 km, the transmission voltage should be_________kv?

   A. 132 kV
   B. 66 kV
   C. 33 kV
   D. 11 kV

2. For transmission of power over a distance of 500 km, the transmission voltage should be in the range?

   A. 150 to 220 kV
   B. 100 to 120 kV
   C. 60 to 100 kV
   D. 20 to 50 kV

3. 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

4. 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

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

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

6. Which of the following materials is not used for transmission and distribution of electrical power________________?

   A. Copper
   B. Aluminium
   C. Steel
   D. Tungsten

7. 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

8. Most of the high transmission lines in Pakistan are_______________?

   A. underground
   B. overhead
   C. either of the above
   D. none of the above

9. High voltage transmission lines use__________________?

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

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

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