electrical engineering MCQs – Page 156

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 Review each marked answer and report any item that may be outdated or unclear.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

3101. In an Anderson bridge, the unknown inductance is measured in terms of_______________?
0

A. known inductance and resistance

B. known capacitance and resistance

C. known inductance

D. known resistance

3102. In pneumatic control systems the control valve used as final control element converts____________?
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A. none of the above

B. pressure signal to electric signal

C. position change to pressure signal

D. electric signal to pressure signal

E. pressure signal to position change

3103. In an AC. co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be_____________?
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A. out of phase by 30

B. out of phase by 60

C. out of phase by 0

D. out of phase by 180

E. out of phase by 90

3104. In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?
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A. neither too small not too large

B. as short as possible

C. as long as possible

D. very thick

3105. Which of the following is the voltage for single phase A.C. system ?
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A. 22 V

B. 15 kV

C. 5 kV

D. None of the above

E. 440 V

3106. If the gain of the critical damped system is increased it will behave as______________?
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A. overdamped

B. underdamped

C. critically damped

D. none of the above

E. oscillatory

3107. Volt box is a component to_____________?
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A. measure voltage

B. extend voltage range

C. compare voltage in a box

D. none of the above

3108. A CRO is used to measure _________________?
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A. All of above

B. Voltage

C. Frequency

D. Phase

3109. An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is______________?
0

A. G/n

B. (n-1)G

C. G/(n-1)

D. nG

3110. A phase lag lead network introduces in the output_______________?
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A. none of the above

B. lag at high frequencies and lead at low frequencies

C. lag at low frequencies and lead at high frequencies

D. lag at all frequencies

3111. Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?
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A. Integrating instruments

B. Recording instruments

C. Absolute instruments

D. Indicating instruments

3112. A.C. servomotor is basically a____________?
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A. three phase induction motor

B. two phase induction motor

C. single phase induction motor

D. universal motor

3113. 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. Laplace Transform

D. Fourier Integral

3114. In a Weston frequency meter, the magnetic axes of the two fixed coils are__________________?
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A. inclined at 120

B. inclined at 60

C. perpendicular

D. parallel

3115. is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another_______________?
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A. Tangent galvanometer

B. Current transformer

C. None of the above

D. Meggar

3116. Any externally introduced signal affecting the controlled output is called a______________?
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A. feedback

B. stimulus

C. gain control

D. signal

3117. A universal RLC bridge uses_________________?
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A. Any of the above

B. Maxwell Wein bridge for measurement of inductance and modified De Santys bridge for measurement of capacitance

C. Maxwell bridge configuration for measurement of inductance and De Santas bridge for measurement of capacitance

D. Maxwell Wein bridge for measurement of inductance and Wein bridge for measurement of capacitance

3118. When a differential amplifier is operated single-ended, _______________?
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A. the output is grounded

B. one input is grounded and signal is applied to the other

C. both inputs are connected together

D. the output is not inverted

3119. Which of the following devices are commonly used as error detectors in instruments ?
0

A. Resolvers

B. Vernistats

C. Any of the above

D. Microsyns

3120. Operating torques in analogue instruments are_______________?
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A. deflecting and control

B. vibration and balancing

C. deflecting and damping

D. deflecting, control and damping

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