electrical engineering MCQs – Page 198

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs

1. economics of power generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

3941. To limit short-circuit current in a power system are used______________?
0

A. earth wires

B. reactors

C. isolators

D. H.R.C. fuses

3942. The current zero interruption, in oil and air blast circuit breakers, is achieved by____________?
0

A. lengthening of the gap

B. cooling and blast effect

C. both (A) and (B)

D. deionizing the oil with forced air

E. none of the above

3943. To protect most of the electrical equipment handling low power, the types of relays used are______________?
0

A. thermocouple

B. electronic and bimetallic

C. both (A) and (B)

D. none of the above

3944. Resistance grounding is used for voltage between_________________?
0

A. 33kVto66kV

B. 3.3kVandllkV

C. HkVto33kV

D. none of the above

3945. A thermal protection switch can protect against_____________?
0

A. temperature

B. overload

C. short-circuit

D. over voltage

3946. By which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?
0

A. Radiation

B. All of the above

C. Conduction

D. Convection

3947. Burden of a protective relay is the power______________?
0

A. none of the above

B. required to operate the circuit breaker

C. absorbed by the circuit of relay

D. developed by the relay circuit

3948. Circuit breakers are essentially______________?
0

A. any of the above

B. transformers to isolate the two systems

C. arc extinguishers

D. circuits to break the system

E. current carrying contacts called electrodes

3949. Fault diverters are basically____________?
0

A. circuit breakers

B. fuses

C. relays

D. fast switches

3950. When a wave propagates on a transmission line, it suffers reflection several times at_____________?
0

A. tapping

B. sending end

C. load end

D. sending and other end

E. all of the above

3951. Overload relays are of_______________type
0

A. electromagnetic

B. all above

C. solid state

D. induction

E. thermal

3952. The current zero interruption, in oil and air blast circuit breakers, is achieved by_______________?
0

A. lengthening of the gap

B. cooling and blast effect

C. both A. and B

D. deionizing the oil with forced air

E. none of the above

3953. SF6 gas______________?
0

A. none of the above

B. is lighter than air

C. is yellow in colour

D. is nontoxic

E. has pungent small

3954. H.R.C. fuse, as compared to a rewirable fuse, has_________________?
0

A. high speed of operation

B. all of the above

C. no ageing effect

D. high rupturing capacity

3955. Directional relays are based on flow of____________?
0

A. voltage wave

B. all of the above

C. current

D. power

3956. A switchgear is device used for_____________?
0

A. switching an electrical circuit 111.

B. interrupting an electrical circuit

C. switching and controlling an electrical circuit

D. switching, controlling and protecting the electrical circuit and equipment

3957. The relay operating speed depends upon_________________?
0

A. all of the above

B. armature core air gap

C. the spring tension

D. the rate of flux built up

3958. Protective relays are devices that detect abnormal conditions in electrical circuits by measuring_____________?
0

A. none of the above

B. voltage during abnormal condition

C. constantly the electrical quantities which differ during normal and abnormal conditions

D. current during abnormal condition

3959. Series reactors should have________________?
0

A. high impedance

B. low resistance

C. low impedance

D. high resistance

3960. The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to______________?
0

A. none of the above

B. lubricate the contacts

C. extinguish the arc

D. insulate the contacts from switch body

E. all of the above

Previous Next

Showing 3941 to 3960 of 7381 mcqs