electrical engineering MCQs – Page 356

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 Review each marked answer and report any item that may be outdated or unclear.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

7101. It is noticed that durum charging___________?
0

A. the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)

B. all of the above

C. energy is absorbed by the cell

D. specific gravity of H2SO4 is increased

E. there is a rise in voltage

7102. During the charging of a lead-acid cell__________?
0

A. specific gravity of H2SO4 decreases

B. its voltage increases

C. its cathode becomes dark chocolate brown in colour

D. it gives out energy

7103. Level of electrolyte in a cell should be ________ the level of plates
0

A. above

B. equal to

C. none of the above

D. below

7104. Which among the following constitutes the major load for an automobile battery _________?
0

A. Self starter

B. Brake light

C. Parking lights

D. Spark plugs

7105. It is noticed that during discharging the following does not happen___________?
0

A. both anode and cathode become PbS04

B. specific gravity of H2SO4 decreases

C. voltage of the cell decreases

D. the cell absorbs energy

7106. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?
0

A. lower e.m.f.

B. higher internal resistance

C. small quantity of electrolyte used

D. compactness

7107. The open circuit voltage of any storage cell depends wholly upon___________?
0

A. its chemical constituents

B. its temperature

C. on the strength of its electrolyte

D. all above

7108. Capacity of dry cells is_________?
0

A. none of the above

B. unaffected by the type of discharge

C. more when it is supplying current for intermittent periods

D. more when it is supplying current for continuous periods

7109. Shelf life of a small dry cell is___________?
0

A. less than that of large dry cell

B. none of the above

C. equal to that of large dry cell

D. more than that of large dry cell

7110. Charging of sulfated battery produces _________ heat
0

A. very little

B. less

C. more

D. no

7111. In a lead-acid cell, lead is called as____________?
0

A. none of the above

B. passive material

C. negative active material

D. positive active material

7112. In constant-current charging method, the supply voltage from discharged to fully charged condition____________?
0

A. decreases

B. remains constant

C. none of the above

D. increases

7113. A typical output of a solar cell is_____________?
0

A. 0.26 V

B. 2 V

C. 0.1V

D. 1.1 V

7114. Internal short circuits are caused by___________?
0

A. breakdown of one or more separators

B. excess accumulation of sediment at the bottom of the cell

C. both (A) and (B)

D. none of the above

7115. When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance
0

A. reddish

B. bright

C. dull

D. milky

7116. Life of the batteries is in the following ascending order____________?
0

A. Nickel-cadmium cell, Edison cell, lead-acid cell

B. Lead-acid cell, Nickel-cadmium cell, Edison cell

C. Edison cell, Nickel-cadmium cell, lead-acid cell

D. Lead-acid cell, Edison cell, Nickel cadmium cell

7117. Specific gravity of electrolyte in Edison cell is_____________?
0

A. 0.8

B. 1.1

C. 0.95

D. 1.21

7118. Battery charging equipment is generally installed______________?
0

A. as near as practical to the battery being charged

B. in clean and dry place

C. in location having all above features

D. in well ventilated location

7119. If a battery is wrongly connected on charge following will happen__________?
0

A. current drawing will be very small

B. current delivered by the battery will be high

C. current drawing will be nil

D. current drawing will be very high

7120. Trickle charging of a storage battery helps to___________?
0

A. keep it fresh and fully charged

B. maintain proper electrolyte level

C. prevent sulphation

D. increase its reserve capacity

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