electrical engineering MCQs – Page 149

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 Review each marked answer and report any item that may be outdated or unclear.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
2961. The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a _________________?
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A. single-phase winding

B. any of the above

C. two-phase winding

D. three-phase winding

2962. A multirangq instrument has________________?
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A. multiple shunt or series resistances inside the meter

B. multicoii arrangement

C. variable turns of coil

D. any of the above

E. multi range meters inside the measurement system

2963. A good control system has all the following features except_____________?
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A. good accuracy

B. good stability

C. slow response

D. sufficient power handling capacity

2964. Damping of the Ballistic galvanometer is made small to_______________?
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A. get minimum overshoot

B. make the system oscillatory

C. get first deflection large

D. make the system critically damped

2965. The tail current in a differential amplifier equals ______________?
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A. collector voltage divided by collector resistance

B. sum of two emitter currents

C. collector current divided by current gain

D. difference between two emitter currents

2966. The Op-amp can amplify______________?
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A. a.c. signals only

B. d.c. signals only

C. both a.c. and d.c. signals

D. neither d.c. nor a.c. signals

2967. In a Weston synchronoscope, the fixed coils are connected across_______________?
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A. bus-bars

B. none of the above

C. a lamp

D. incoming alternator
2968. The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?
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A. load impedance is low

B. load impedance is high

C. none of the above

D. supply voltage is low

2969. The second derivative input signals modify which of the following ?
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A. The time constant and suppress the oscillations

B. The time constant of the system

C. None of the above

D. Damping of the system

E. The gain of the system

2970. In a control system the output of the controller is given to_____________?
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A. none of the above

B. sensor

C. comparator

D. amplifier

E. final control element
2971. The common-mode voltage gain of a differential amplifier is equal to RC divided by _______________?
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A. re/2

B. 2RE

C. 2re

D. re

2972. Which of the following is the definition of proportional band of a controller ?
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A. None of the above

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

C. The range of measured variables through which the air output changes from maximum to minimum

D. Any of the above

E. The range of measured variables from set value

2973. Standard resistor is made from_________________?
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A. maganin

B. nichrome

C. platinum

D. silver

2974. _______________is an open loop control system?
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A. Field controlled D.C. motor

B. Stroboscope

C. Ward Leonard control

D. Metadyne

2975. The output of a particular Op-amp increases 8V in 12s. The slew rate is_______________?
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A. none of these

B. 90 V/s

C. 1.5 V/s

D. 0.67 V/s
2976. Commonly used instruments in power system measurement are_______________?
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A. moving coil or iron

B. electrostatic

C. rectifier

D. induction
2977. The viscous friction co-efficient, in force-voltage analogy, is analogous to______________?
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A. reciprocal of conductance

B. none of the above

C. charge

D. reciprocal of inductance

E. resistance
2978. Which of the following essential features is possessed by an indicating instrument?
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A. Deflecting device

B. Damping device

C. All of the above

D. Controlling device

2979. Zero initial condition for a system means_______________?
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A. system is at rest and no energy is stored in any of its components

B. input reference signal is zero

C. zero stored energy

D. ne initial movement of moving parts

2980. Which of the following devices should be used for accurate measurement of low D.C. voltage ?
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A. None of the above

B. Small range thermocouple voltmeter

C. D.C. potentiometer

D. Small range moving coil voltmeter