electrical engineering MCQs – Page 110

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 Review each marked answer and report any item that may be outdated or unclear.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

2181. The stray line of magnetic flux is defined as_____________?
0

A. a line of magnetic flux which does not follow the designed path

B. the mean length of a ring shaped coil

C. a line of magnetic flux in a non-uniform field

D. a line vertical to the flux lines

2182. The output voltage Vo of the above circuit is____________?
0

A. -1.2V

B. -0.2V

C. -6V

D. -5V

2183. A magnetic field exists around____________?
0

A. moving charges

B. aluminium

C. iron

D. copper

2184. The single phasing relays are used for the protection of_____________?
0

A. three phase motors

B. two single phase motors running in parallel

C. two phase motors only

D. single phase motors only

2185. A.C. network analyser is used to solve problems of_______________?
0

A. load flow and short-circuit

B. load flow

C. load flow, short-circuit and stability

D. none of the above

E. load flow and stability

2186. A rotary converter in general construction and design, is more or less like___________?
0

A. a transformer

B. an alternator

C. any D.C. machine

D. an induction motor

2187. The relative permeability is less than unity is case of_____________?
0

A. non-ferrous materials

B. ferrites

C. ferromagnetic materials

D. diamagnetic materials

2188. Flemings left hand rule is used to find_________________?
0

A. direction of magnetic field due to current carrying conductor

B. direction of flux in a solenoid

C. polarity of a magnetic pole

D. direction of force on a current carrying conductor in a magnetic field

2189. Air blast circuit breakers for 400 kV power system are designed to operate in_______________?
0

A. 0.5 sec

B. 100 microsecond

C. 0.1 sec

D. 50 millisecond

2190. Which of the following is a ferromagnetic material ?
0

A. Nickel

B. Tungsten

C. Aluminium

D. Copper

2191. The relay operating speed depends upon_________________?
0

A. the rate of flux built up

B. all of the above

C. armature core air gap

D. the spring tension

2192. A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?
0

A. 633.8 N/Wb

B. 63.38 N/Wb

C. 6338 N/Wb

D. 63380 N/Wb

2193. When an iron piece is placed in a magnetic field_____________?
0

A. the magnetic field will not be affected

B. the magnetic lines of force will bend away from their usual paths in order to go away from the piece

C. the magnetic lines of force will bend away from their usual paths in order to pass through the piece

D. the iron piece will break

2194. Protection by fuses is generally not used beyond__________?
0

A. 200 A

B. 50 A

C. 100 A

D. 20 A

2195. Susceptibility is positive for______________?
0

A. ferromagnetic substances

B. none of the above

C. non-magnetic substances

D. diamagnetic substances

2196. In a transistor, signal is transferred from a___________circuit?
0

A. low resistance to low resistance

B. high resistance to high resistance

C. high resistance to low resistance

D. low resistance to high resistance

2197. A zener diode is destroyed if it______________?
0

A. none of the above

B. is reverse biased

C. carrier more than rated current

D. is forward biased

2198. _____________ filter circuit results in the best voltage regulation?
0

A. choke input

B. resistance input

C. capacitor input

D. none of the above

2199. Radiations from a black body are proportional to____________?
0

A. T2

B. T*

C. T3

D. T1

2200. Ground resistance should be designed such that_____________?
0

A. grounding resistance should be as low as possible

B. grounding resistance should be always zero

C. none of the above

D. grounding resistance should be as high as possible

Previous Next

Showing 2181 to 2200 of 7381 mcqs