electrical engineering MCQs – Page 276

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 Review each marked answer and report any item that may be outdated or unclear.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

5501. What is the octal equivalent of the binary number : 10111101 ?
0

A. 572

B. 573

C. 675

D. 275

5502. What is/are the configurable functions of each and every IOBs connected around the FPGA device from the operational point of view ?
0

A. Bi-directional I/O pin access

B. Input operation

C. All of the above

D. Tristate output operation

5503. Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is__________________?
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A. CMOS

B. ECL

C. TTLLS

D. TTLAS

5504. The inputs of a NAND gate are connected together. The resulting circuit is _______________?
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A. None of the above

B. OR gate

C. NOT gate

D. AND gate

5505. Positive logic in a logic circuit is one in which______________?
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A. logic 0 and 1 are represented by 0 and positive voltage respectively

B. logic 0 and, -1 are represented by negative and positive voltages respectively

C. logic 0 voltage level is higher than logic 1 voltage level

D. logic 0 voltage level is lower than logic 1 voltage level

5506. Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is__________________?
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A. 12CPS

B. 120 CPS

C. 10 CPS

D. None of the above

5507. Most of the digital computers do not have floating point hardware because_____________?
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A. of no specific reason.

B. floating point hardware is costly

C. it is slower than software

D. it is not possible to perform floating point addition by hardware

5508. An important limitation of a crystal oscillator is____________?
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A. Its high output

B. Less availability of quartz crystal

C. Its low output

D. Its high Q

5509. In an LC transistor oscillator, the active device is___________?
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A. None of the above

B. Transistor

C. LC tank circuit

D. Biasing circuit

5510. An oscillator differs from an amplifier because it_____________?
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A. Requires no d.c. supply

B. Has more gain

C. Requires no input signal

D. Always has the same input

5511. In a certain oscillator Av = 50. The attention of the feedback circuit must be___________?
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A. 1

B. 10

C. 1

D. 02

5512. A second condition for oscillations is____________?
0

A. The attention of the feedback circuit must be one-third

B. A gain of 1 around the feedback loop

C. No gain around the feedback loop

D. The feedback circuit must be capacitive

5513. In Colpitts oscillator, feedback is obtained___________?
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A. By a tickler coil

B. A. By magnetic induction

C. From the centre of split capacitors

D. None of the above

5514. An oscillator produces___________oscillations?
0

A. None of the above

B. Modulated

C. Damped

D. Undamped

5515. If the crystal frequency changes with temperature, we say that crystal has___________temperature coefficient?
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A. Zero

B. None of the above

C. Negative

D. Positive

5516. The application where one would most likely find a crystal oscillator is____________?
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A. Radio receiver

B. Radio transmitter

C. AF sweep generator

D. None of the above

5517. An LC oscillator cannot be used to produce ____________frequencies?
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A. Audio

B. Very high

C. Very low

D. High

5518. In an LC oscillator, if the value of L is increased four times, the frequency of oscillations is __________?
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A. Decreased 4 times

B. Increased 4 times

C. Decreased 2 times

D. Increased 2 times

5519. The Q of the crystal is of the order of____________?
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A. 1000

B. 100

C. More than 10,000

D. 50

5520. The signal generator generally used in the laboratories is___________oscillator?
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A. Hartely

B. Phase shift

C. Crystal

D. Wien-bridge

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