High voltage direct current (HVDC) and High voltage engineering(HVE) MCQs Part-1

HVDC/HVE 

1. Different form of High voltages______.

a. High DC voltages

b. High AC voltages of power frequency

c. High AC voltage of High Frequency

d. High Transient or Impulse voltage of Very short duration

e. Transient Voltages of longer duration such as switching surges

f. All of above

2. High voltage transformers are normally used in high voltage labs for testing purpose______.

a. True

b. False

3. High Voltage power frequency test transformers are required to produce single phase very high voltages_______.

a. True

b. False

4. In case of Resonant transformer voltage will very high______.

a. True

b. False

5. In case of resonant transformer at certain loading condition capacitance is equal to inductance______.

a. True

b. False

6. In case of Parallel Resonant transformer out put voltage is independent of Q Factor_________.

a. True

b. False

7. Tesla coil circuit works on the principle of resonance_______.

a. True

b. False

8. Function of tesla coil to produce wireless communication_________.

a. True

b. False

9. A Tesla coil is a radio frequency oscillator that drives the air-core double-tuned resonant transformer to produce high voltages with low currents.

a. True

b. False

10. Tesla coil uses a specialized transformer called a__________.

a. Resonant transformer

b. A radio-frequency transformer

c. an oscillation transformer.

d. All of above

11. In Tesla coil combination of a capacitor and primary winding ‘L1’ of the circuit forms a tuned circuit_______.

a. True

b. False

12. Selection of BIL level for lines depend on__________.

a. Atmospheric conditions

b. lightning activity

c. insulation

d. All of above

13. Multiplier Circuits are designed to overcome the difficulties in higher voltage generation using cascaded voltage multiplier circuits which require too many supply and isolating transformers.

a. True

b. False

14. Advantages of Cascading Transformer are________.

a. Light and Compact

b. Transportation and assembly is easy

c. The construction is identical for isolating transformer and high voltage cascade unit 3 phase connection in delta and star is possible for 3 unit

d. All of above

15. The Tesla coil works with the principle of Electromagnetic Induction. According to which, when a conductor is placed under a varying magnetic field, a small current will be induced inside the conductor.

a. True

b. False

16. Application of HVDC X-Ray units_____.

a. Electrostatic precipitators

b. Particle Accelerators in nuclear physics

c. Electron Microscopes

d. All of above

17. What are the applications of impulse current wave forms of high magnitude?

a. Studies of electric plasmas in high current discharges

b. Electric arc studies

c. Testing of non-linear resistors

d. Testing of surge diverters

e. All of above

18. Components of a multi stage impulse generator are________.

a. DC charging unit

b. Battery

c. Inductor

d. Diode

19. A gas in normal state is almost a perfect_________.

a. Conductor

b. Insulator

c. Semi-conductor

d. Dielectric

20. Which theory explains the mechanism for breakdown under different conditions?

a. Townsend theory

b. Streamer theory

c. Clump theory

d. Only (a) and (b)