electrical engineering MCQs – Page 108

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 Review each marked answer and report any item that may be outdated or unclear.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 generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
2141. An opamp has a slew rate of 5V/ S. the largest sine wave o/p voltage possible at a frequency of 1MHz is____________?
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A. 10 V

B. 5V

C. 5/2 V

D. 5 V

2142. A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be______________?
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A. BLI

B. zero

C. B2LI

D. BLI2

2143. Magnetic circuit breaker has ___________ trip action
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A. delayed

B. instantaneous

C. both of the above

D. none of the above

2144. Which of the following amplifier is used in a digital to analog converter?
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A. Summer

B. Voltage follower

C. Non inverter

D. Difference amplifier

2145. The fuse rating is expressed in terms of_____________?
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A. VAR

B. kVA

C. current

D. voltage

2146. To reduce short circuit fault currents are used_____________?
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A. reactors

B. capacitors

C. none of the above

D. resistors

2147. Resistance grounding is used for voltage between_________________?
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A. 3.3kVandllkV

B. HkVto33kV

C. none of the above

D. 33kVto66kV

2148. Magnetising steel is normals difficult because____________?
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A. it has low permeability

B. it has high specific gravity

C. it has high permeability

D. it corrodes easily

2149. In a single bus-bar system there will be complete shut down when____________?
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A. fault occurs with respect to earthing

B. two or more faults occur simultaneously

C. fault occurs on neutral line

D. fault occurs on the bus itself
2150. The ratio of intensity of magnetisation to the magnetisation force is known as_____________?
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A. flux density

B. susceptibility

C. none of the above

D. relative permeability

2151. A _________ is used to measure the stator % winding temperature of the generator?
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A. pyrometer

B. resistance thermometer

C. thermometer

D. thermocouple

2152. In a rotary converter I2R losses as compared to a D.C. generator of the same size will be___________?
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A. three times

B. same

C. less

D. double

2153. When a step-input is given to an op-amp integrator, the output will be______________?
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A. A rectangular wave

B. A triangular wave with dc bias

C. A ramp

D. A sinusoidal wave

2154. A switchgear is device used for_____________?
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A. interrupting an electrical circuit

B. switching an electrical circuit 111.

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

D. switching and controlling an electrical circuit

2155. The commonly used material for shielding or screening magnetism is____________?
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A. brass

B. copper

C. aluminium

D. soft iron
2156. Substances which have permeability less than the permeability of free space are known as_____________?
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A. paramagnetic

B. ferromagnetic

C. bipolar

D. diamagnetic
2157. The power loss is an important factor for the design of_______________?
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A. motor

B. generator

C. transmission line

D. feeder

2158. Air blast circuit breaker is used for_____________?
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A. intermittant duty

B. over currents

C. repeated duty

D. short duty

2159. The ionization potential of mercury is approximately_____________?
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A. 10.4 V

B. 8.4 V

C. 16.4 V

D. 5.4 V

2160. Indicate which of the following material does not retain magnetism permanently
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A. Stainless steel

B. Soft iron

C. None of the above

D. Hardened steel