MCQs in Microelectronics Part I

(Last Updated On: December 8, 2017)

MCQs in Microelectronics - MCQs Part I

This is the Multiples Choice Questions Part 1 of the Series in Microelectronics as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

Multiple Choice Questions Topic Outline

  • MCQs in Microelectronics
  • MCQs in Integrated Circuits components
  • MCQs in Characteristics and products (ICs)
  • MCQs in Operational Amplifiers
  • MCQs in Multivibrators

The Series

Following is the list of multiple choice questions in this brand new series:

Microelectronics MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III

Start Practice Exam Test Questions Part 1 of the Series

1. The integrated circuit was invented at Texas instrument in 1958 by

  • A. Jonathan Kurtz
  • B. James Faug
  • C. Jack Kilby
  • D. Harold Lanche

2. Which component cannot be fabricated into ICs?

  • A. Diode
  • B. Resistor
  • C. Inductor
  • D. Transistor

3. What is the purpose of a comparator in op-amps?

  • A. To detect the occurrence of a changing input voltage
  • B. To maintain a constant output when the dc input voltage changes
  • C. To produce change in output when an input voltage equals a reference voltage
  • D. To amplify an input voltage

4. The op-amp comparator circuit uses

  • A. Negative feedback
  • B. A resistor
  • C. Positive feedback
  • D. No feedback

5. What is a complete electronic circuit, containing transistors, diodes, resistors and capacitors processed on and contained entirely within a single chip of silicon?

  • A. Integrated circuit (IC)
  • B. Monolithic IC
  • C. Linear IC
  • D. Digital IC

6. What process is used to produce IC semiconductor elements?

  • A. Alloy junction
  • B. Mesa diffusion
  • C. Grown diffusion
  • D. Planar diffusion

7. Which integrated circuit is having more than 1000 gates?

  • A. Small-scale integration (SSI)
  • B. Medium-scale integration (MSI)
  • C. Large-scale integration (LSI)
  • D. Very large-scale integration (VLSI)

8. What characteristic does not apply to an op-amp?

  • A. Low power
  • B. High gain
  • C. High input impedance
  • D. Low output impedance

9. An integrator op-amp uses what element in the feedback path?

  • A. Capacitor
  • B. Resistor
  • C. Inductor
  • D. Transistor

10. Which integrated circuit is having more that 100 gates?

  • A. Small-scale integration (SSI)
  • B. Medium-scale integration (MSI)
  • C. Large-scale integration (LSI)
  • D. Very large-scale integration (VLSI)

11. Which of the choices below are sources of output offset voltage?

  • A. The difference in VBE values
  • B. The difference in VCE values
  • C. The difference in transistor voltage
  • D. All of the choices

12. The voltage gain of differential amplifier

  • A. Equals the AC collector resistance divided by two times the AC resistance of the emitter diode
  • B. Is the sum of two emitter currents
  • C. Equals the difference between two base currents
  • D. Is half of either collector current

13. Which integrated circuit is having 10 to 100 gates?

  • A. Small-scale integration (SSI)
  • B. Medium-scale integration (MSI)
  • C. Large-scale integration (LSI)
  • D. Very large-scale integration (VLSI)

14. Integrated circuits having up to 9 gates is called

  • A. Small-scale integration (SSI)
  • B. Medium-scale integration (MSI)
  • C. Large-scale integration (LSI)
  • D. Very large-scale integration (VLSI)

15. What is VCO

  • A. Exhibits a frequency that can be varied with a dc control voltage
  • B. A single pole low pass filter
  • C. Is the terminal of the op-amp where input resistors are placed
  • D. All of the choices

16. The reason why integrated circuits are divided into digital linear categories is because

  • A. They either process analog or digital signals
  • B. They are either used as input of output components
  • C. Up to the present these are the only two known categories
  • D. They are simply circuits that happen to be constructed integrally and like all circuits are either switching type or amplifying type

17. How is the output of a differentiator related to the input in an op-amp?

  • A. The output of a differentiator is proportional to the rate of change of the input
  • B. The output of a differentiator is inversely proportional to the rate of change of the input
  • C. The two parameters are not related
  • D. The two parameters are always equal to each other

18. ICs have advantages over discrete device circuits which is

  • A. Lower cost
  • B. High reliability
  • C. Smaller size
  • D. All of the above

19. Dual-in-line pick up (DIP) is the most popular IC package because

  • A. It is low in cost
  • B. It is one of the tiniest package known
  • C. It ruggedly resist vibration due to its solid construction
  • D. All of the above

20. What is the typical input resistance of the op-amp amplifier when measured under open loop?

  • A. 2 MΩ
  • B. 3 MΩ
  • C. 1.5 MΩ
  • D. 2.5 MΩ

21. After assembly, the ICs are tested and classified as either

  • A. Military
  • B. Industrial
  • C. Military or industrial
  • D. Military and industrial

22. For a constant input voltage to an integrator, why is the voltage across the capacitor linear?

  • A. Capacitor diode does not dissipate heat
  • B. Capacitor current is constantly changing
  • C. Capacitor current is linear
  • D. Capacitor current is constant

23. Upon what principle does a relaxation oscillator operate?

  • A. Resistor in cascade
  • B. The charging and discharging of capacitor
  • C. The rectification process of a diode
  • D. Switching transistors

24. ICs for military and space applications are tested in the temperature range of

  • A. 0ºC to +70 ºC
  • B. -55 ºC to +125 ºC
  • C. -173 ºC to + 100 ºC
  • D. -10 ºC to + 25 ºC

25. For most commercial and industrial operations, ICs are tested in the temperature range of

  • A. 0ºC to +70 ºC
  • B. -55 ºC to +125 ºC
  • C. -173 ºC to + 100 ºC
  • D. -10 ºC to + 25 ºC

26. An IC op-amp that combines FETs and bipolar transistors.

  • A. BIFET
  • B. MOSFET
  • C. CMOS
  • D. IGFET

27. A mass of metal attached to the case of a transistor to allow the heat to escape more easily.

  • A. Flag
  • B. Heat sink
  • C. Op-amp
  • D. Photodiode

28. Which of the following IC processes digital signals?

  • A. Digital IC
  • B. Discrete IC
  • C. Linear IC
  • D. Monolithic IC

29. Which of the following IC processes analog signals?

  • A. Digital IC
  • B. Discrete IC
  • C. Linear IC
  • D. Monolithic IC

30. A signal that is applied with equal strength to both inputs of a differential amplifier or an op-amp.

  • A. Common-emitter circuit
  • B. Common-ration signal
  • C. CMRR
  • D. Common mode signal

31. A base circuit that a designer can modify to get more advanced circuits

  • A. Experimental
  • B. Prototype
  • C. Peak detector
  • D. Loading

32. What is the most commonly used type of linear IC?

  • A. 741
  • B. 555 timer
  • C. Operational amplifier
  • D. LM 340

33. What has been considered as the industry standard of linear ICs?

  • A. 555 timer
  • B. 741 op amp
  • C. LM 340
  • D. LM 317

34. What type of response characterizes the single pole low pass filter?

  • A. Flat from dc to the critical frequency
  • B. Current downward up to the maximum frequency
  • C. Curved upward to the maximum frequency
  • D. No response characteristics

35. Which of the item below is an advantage of a shunt regulator over a series type?

  • A. Has an inherent current limiting
  • B. Efficient than series regulator because of its component used
  • C. A non regulating device
  • D. None of the choices

36. What is the most popular IC used in timing circuits?

  • A. 555 timer
  • B. 741
  • C. LM 317
  • D. LM 340

37. What is the typical total power dissipated by the operational amplifier?

  • A. 5 mW
  • B. 0.5 mW
  • C. 50 mW
  • D. 500 mW

38. In the standard letter-number identification code of operational amplifiers, the letter prefix which normally consists of two or three letters identifies the

  • A. Manufacturer
  • B. Type of packaging
  • C. Type of op-amp
  • D. Temperature range of operation

39. An op-amp circuit that has its output tied directly to the inverting input terminal is called a ________________

  • A. Current follower
  • B. Inverting amplifier
  • C. Non-inverting amplifier
  • D. Voltage follower

40. Most op-amps circuit use

  • A. Positive feedback
  • B. Negative feedback
  • C. Open-loop operation
  • D. Closed-loop operation

41. The three most common package suffix codes are the following except one

  • A. A
  • B. D
  • C. J
  • D. N

42. What is the package suffix code for a plastic dual-in-line for surface mounting on PC board?

  • A. D
  • B. J
  • C. N
  • D. P

43. What is the approximate short circuit current output of 741 op amp?

  • A. 15 mA
  • B. 25 mA
  • C. 30 mA
  • D. 35 mA

44. A circuit whose components are soldered or otherwise connected mechanically

  • A. Discrete circuit
  • B. Non discrete circuit
  • C. Biasing circuit
  • D. Integrated circuit

45. MPP value in an op-amp is synonymous with

  • A. Output voltage swing
  • B. Equal to the difference of the two supply voltages
  • C. The maximum unclipped peak-to-peak output of an amplifier
  • D. All of the choices

46. What is the highest undistorted frequency out of an op-amp for a given slew rate and peak voltage?

  • A. Power bandwidth
  • B. Cut-off frequency
  • C. Critical frequency
  • D. 3-dB bandwidth

47. What is the summing point in op-amps?

  • A. Simulates mathematical integration
  • B. Acts as a scaling differentiator
  • C. Determines the rate of change of the integrator output voltage
  • D. A terminal of the op-amp where the input resistors are commonly connected

48. In terms of circuit components, what does the term pole refer to?

  • A. A single RL circuit
  • B. A single RC circuit
  • C. A cascaded amplifier
  • D. A summing amplifier

49. What is the slew rate of a 741 operational amplifier?

  • A. 0.5 V/µs
  • B. 1 V/µs
  • C. 0.5 V/ms
  • D. 1 V/ms

50. What specification of an operational amplifier which tells how fast the output voltage can change?

  • A. Frequency response
  • B. Common mode rejection ration
  • C. Slew rate
  • D. Open-loop voltage gain

Complete List of MCQs in Electronics Engineering per topic

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MCQs in Microelectronics Part I
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