Electro-mechanical voltage regulators are generally used in___________?

Related Mcqs:

1. The voltage drop, for constant voltage transmission is compensated by installing__________?

   A. inductors
   B. capacitors
   C. synchronous motors
   D. all of above
   E. none of the above

2. The voltage regulation in magnetic amplifier type voltage regulator is effected by__________?

   A. electromagnetic induction
   B. varying the resistance
   C. varying the reactance
   D. variable transformer

3. The operating voltage of high voltage cables is up to_______________?

   A. l.lkV
   B. 3.3kV
   C. 6.6kV
   D. llkV

4. The material generally used for armour of high voltage cables is_____________?

   A. aluminium
   B. steel
   C. brass
   D. copper

5. 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 km

6. Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?

   A. Static condenser
   B. Synchronous condenser
   C. Tap changing transformer
   D. Booster transformer

7. Constant voltage transmission entails the following disadvantage?

   A. large conductor area is required for same power transmission
   B. short-circuit current of the system is increased
   C. either of the above
   D. none of the above

8. The frequency of voltage generated, in case of generators, can be increased by___________?

   A. using reactors
   B. increasing the load
   C. adjusting the governor
   D. reducing the terminal voltage
   E. none of the above

9. Which of the following is the demerit of a ‘constant voltage transmission system’ ?

   A. Increase of short-circuit current of the system
   B. Availability of steady voltage at all loads at the line terminals
   C. Possibility of better protection for the line due to possible use of higher terminal reactants
   D. Improvement of power factor at times of moderate and heavy loads
   E. Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission

10. High voltage transmission lines use__________________?

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