electrical engineering MCQs – Page 311

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 Review each marked answer and report any item that may be outdated or unclear.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
6201. In a control system integral error compensation _________________ steady state error?
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A. any of the above

B. does not have any effect on

C. minimizes

D. increases

6202. In an automatic control system which of the following elements is not used ?
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A. Final control element

B. Oscillator

C. Error detector

D. Sensor

6203. Which of the following devices are commonly used as error detectors in instruments ?
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A. Any of the above

B. Vernistats

C. Resolvers

D. Microsyns

6204. The phase lag produced by transportation relays_____________?
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A. is independent of frequency

B. decreases linearly with frequency

C. increases linearly with frequency

D. is inversehproportional to frequency

6205. An increase in gain, in most systems, leads to_____________?
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A. larger damping ratio

B. smaller damping ratio

C. constant damping ratio

D. none of the above

6206. Transfer function of a system is used to calculate which of the following ?
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A. The order of the system

B. The output for any given input

C. The steady state gain

D. The time constant

6207. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?
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A. All of the above

B. Forward gain

C. Loop gain

D. Frequency

6208. With feed back __________ reduces?
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A. system gain

B. system stability and gain

C. system stability

D. none of the above

6209. The position and velocity errors of a type-2 system are_____________?
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A. zero, zero

B. zero, constant

C. constant, infinity

D. constant, constant

6210. Which of the following is the definition of proportional band of a controller ?
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A. The range of measured variables through which the air output changes from maximum to minimum

B. The range of measured variables from set value

C. None of the above

D. Any of the above

E. The range of air output as measured variable varies from maximum to minimum

6211. Which of the following can be measured by the use of a tachogenerator ?
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A. Speed and acceleration

B. Speed

C. None of the above

D. Displacement

E. Acceleration

6212. In closed loop control system, with positive value of feedback gain the overall gain of the system will______________?
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A. be unaffected

B. decrease

C. increase

D. any of the above

6213. A control system in which the control action is somehow dependent on the output is known as____________?
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A. None of the above

B. Semiclosed loop system

C. Open system

D. Closed loop system
6214. For open control system which of the following statements is incorrect ?
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A. Errors are caused by disturbances

B. Recalibration is not required for maintaining the required quality of the output

C. Construction is simple and maintenance easy

D. Less expensive

6215. In a control system the output of the controller is given to_____________?
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A. none of the above

B. amplifier

C. final control element

D. sensor

E. comparator

6216. The frequency and time domain are related through which of the following ?
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A. Either B. or C.

B. Laplace Transform and Fourier Integral

C. Fourier Integral

D. Laplace Transform

6217. A phase lag lead network introduces in the output_______________?
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A. none of the above

B. lag at all frequencies

C. lag at low frequencies and lead at high frequencies

D. lag at high frequencies and lead at low frequencies

6218. In electrical-pneumatic system analogy the current is considered analogous to_____________?
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A. velocity

B. pressure

C. air flow rate

D. air flow

6219. _______________is an open loop control system?
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A. Field controlled D.C. motor

B. Ward Leonard control

C. Stroboscope

D. Metadyne

6220. A differentiator is usually not a part of a control system because it______________?
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A. reduces damping

B. increases input noise

C. reduces the gain margin

D. increases error