electrical engineering MCQs – Page 79

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 Review each marked answer and report any item that may be outdated or unclear.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

1561. The specific gravity of electrolyte is measured by____________?
0

A. a mechanical gauge

B. psychrometer

C. hydrometer

D. manometer

1562. The output voltage of a charger is__________?
0

A. the same as the battery voltage

B. less than the battery voltage

C. higher than the battery voltage

D. none of the above

1563. Cells are connected in series in order to_____________?
0

A. none of the above

B. increase the current rating

C. increase the life of the cells

D. increase the voltage rating

1564. Inductance affects the direct current flow__________?
0

A. only at the time of turning off

B. at all the time of operation

C. at the time of turning on and off

D. only at the time of turning on

1565. Battery charging equipment is generally installed______________?
0

A. in well ventilated location

B. in location having all above features

C. as near as practical to the battery being charged

D. in clean and dry place

1566. The transient currents are associated with the____________?
0

A. impedance of the circuit

B. resistance of the circuit

C. changes in the stored energy in the inductors and capacitors

D. applied voltage to the circuit

1567. The power is measured in terms of decibles in case of_________?
0

A. auto transformers

B. current transformers

C. electronic equipment

D. transformers

1568. In a lead-acid cell, lead is called as____________?
0

A. negative active material

B. positive active material

C. none of the above

D. passive material

1569. In a three-phase supply floating neutral is undesirable because it way give rise to___________?
0

A. high voltage across the load

B. minimun voltage across the load

C. unequal line voltages across the load

D. low voltage across the load

1570. All the electrical connections between the battery and vehicle should be by____________?
0

A. flexible cables

B. thin copper wires

C. thin aluminium wires

D. rigid cables

1571. The product of apparent power and cosine of the phase angle between circuit voltage and current is
0

A. instantaneous power

B. reactive power

C. volt-amperes

D. true power

1572. Capacitors for power factor correction are rated in_________?
0

A. kVAR

B. kV

C. kW

D. kVA

1573. Cables for 220 kV lines are invariably____________?
0

A. rubber insulated

B. compressed oil or compressed gas insulated

C. mica insulated

D. none of the above

E. paper insulated

1574. If a battery is wrongly connected on charge following will happen__________?
0

A. current drawing will be nil

B. current drawing will be very small

C. current delivered by the battery will be high

D. current drawing will be very high

1575. The square waveform of current has following relation between r.m.s. value and average value?
0

A. r.m.s. value of current is less than average value

B. none of the above

C. r.m.s. value is equal to average value

D. r.m.s. value of current is greater than average value

1576. In cables the charging current__________?
0

A. leads the voltage by 90

B. lags the voltage by 90

C. leads the voltage by 180

D. lags the voltage by 180

1577. Cell short circuit results in_________?
0

A. all above

B. low sp. gravity electrolyte

C. abnormal high temperature

D. reduced gassing on charge

1578. The thickness of the layer of insulation on the conductor, in cables, depends upon___________?
0

A. reactive power

B. current carrying capacity

C. voltage

D. power factor

1579. Following will occur if level of electrolyte falls below plates____________?
0

A. capacity of the cell is reduced

B. open plates are converted to lead sulphate

C. all above

D. life of the cell is reduced

1580. The capacity of a lead-acid cell depends on
0

A. temperature

B. rate of discharge

C. quantity of active materials

D. all above

E. density of electrolyte

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