electrical engineering MCQs – Page 100

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 Review each marked answer and report any item that may be outdated or unclear.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
1981. How many op-amps are required to implement this equationop-amps?
comments icon0

A. 2

B. 1

C. 3

D. 4

1982. The arc voltage produced in A.C. circuit breaker is always_____________?
comments icon0

A. leading the arc current by 90

B. none of the above

C. in phase with the arc current

D. lagging the arc current by 90?

1983. he retentivity (a property) of material is useful for the construction of_______________?
comments icon0
A. permanent magnets

B. electromagnets

C. non-magnetic substances

D. transformers

1984. Which of the following is the least expensive protection for overcurrent is low voltage system ?
comments icon0

A. None of the above

B. Rewireable fuse

C. Air break circuit breaker

D. Isolator

E. Oil circuit breaker

1985. Series reactors should have________________?
comments icon0

A. low impedance

B. high impedance

C. low resistance

D. high resistance

1986. If cathode and anode connections in a mercury arc rectifier are inter changed_____________?
comments icon0
A. the rectifier will not operate

B. internal losses will be reduced

C. both ion and electron streams will move in the same direction

D. the rectifier will operate at reduced efficiency

1987. An ideal OP-AMP is an ideal__________?
comments icon0

A. Voltage controlled Current source

B. Current controlled Voltage source

C. Current controlled Current source

D. Voltage controlled Voltage source
1988. SF6 gas______________?
comments icon0

A. has pungent small

B. is yellow in colour

C. is nontoxic

D. none of the above

E. is lighter than air

1989. Which of the following type of materials are not very important for engineering applications ?
comments icon0

A. Ferromagnetic

B. Diamagnetic

C. Paramagnetic

D. None of the above

1990. To protect most of the electrical equipment handling low power, the types of relays used are______________?
comments icon0

A. thermocouple

B. electronic and bimetallic

C. both (A) and (B)

D. none of the above

1991. he retentivity (a property) of material is useful for the construction of__________?
comments icon0

A. transformers

B. electromagnets

C. non-magnetic substances

D. permanent magnets
1992. Differential amplifiers are used in______________?
comments icon0

A. Buffers

B. Voltage followers

C. Voltage regulators

D. Instrumentation amplifiers
1993. For which of the following materials the net magnetic moment should be zero ?
comments icon0

A. Diamagnetic materials

B. Antiferrimagnetic materials

C. Antiferromagnetic materials

D. Ferrimagnetic materials

1994. Bus coupler is very essential in arrangement______________?
comments icon0

A. single bus

B. double bus, double breaker

C. main and transfer bus

D. all of the above

1995. Which of the following parameter can be neglected for a short line ?
comments icon0

A. Resistance

B. Inductance

C. Reactance

D. Capacitance
1996. Air gap has_________eluctance as compared to iron or steel path?
comments icon0

A. higher

B. zero

C. little

D. lower
1997. To limit short-circuit current in a power system are used______________?
comments icon0

A. earth wires

B. H.R.C. fuses

C. isolators

D. reactors
1998. A keeper is used to_____________?
comments icon0

A. restore lost flux

B. provide a closed path for flux

C. amplify flux

D. change the direction of magnetic lines

1999. The fuse wire, in D.C. circuits, is inserted in____________?
comments icon0

A. negative circuit only

B. positive circuit only

C. both (A) and (B)

D. either (A) or (B)

2000. The advantage of mercury arc rectifier is that________________?
comments icon0

A. it is comparatively noiseless

B. it has high overload capacity

C. it is light in weight and occupies small floor space

D. it has high efficiency

E. all of the above