Saturday, October 25, 2014

List of Multiple Choice Questions in Teach Yourself Electricity and Electronics

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Multiple Choice Questions in Teach Yourself Electricity and Electronics

You are here because you are looking for the complete set of Multiple Choice Questions in Teach Yourself Electricity and Electronics. Below are the compilation of all the test (mcqs) for each and every chapters in the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco. This includes the test exam per part and the final examination. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.

Part 1: Direct Current
Part 2: Alternating Current
Chapter 10: MCQs in Inductance
Chapter 12: MCQs in Phase
Part 3: Basic Electronics
Chapter 24: MCQs in Amplifiers
Part 4: Advanced Electronics and Related Technology

Take the Final Exam


Published by: Froyd Wess10:46

Teach Yourself Electricity and Electronics Final Examination - Answers

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Answers key in Teach Yourself Electricity and Electronics Final Examination

Below are the answers key in Teach Yourself Electricity and Electronics Final Examination that that could test your knowledge and learning after reading the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco.

1. D. Gets larger positively.

2. D. Detecting CW.

3. D. Oscillator.

4. D. Increase the operating speed.

5. C. Kilowatt hours.

6. D. The I2R losses are lower.

7. E. An insect robot.

8. B. Superior image quality.

9. E. Collector.

10. A. A triangle. 

11. B. Gets more and more negative.

12. D. 7.72 microseconds.

13. B. A photovoltaic cell.

14. A. The connection between a computer and its monitor.

15. C. 250 mA.

16. A. An electronic calculator.

17. B. Contained in sidebands.

18. D. Placing a small variable capacitor across the crystal.

19. A. The current is the same through each one.

20. B. Protect the diodes against surge currents.

21. D. Zero reactance.

22. D. 800 μH.

23. E. Channel.

24. C. 180 degrees.

25. B. 10-3 V.

26. E. Susceptance.

27. E. Watts.

28. A. Current lags voltage by 90 degrees.

29. C. A Klystron.

30. C. At right angles to the flow of current.

31. E. 360 degrees.

32. A. Higher speed.

33. D. Keep wire leads short.

34. B. It can be easily stepped up or down in voltage.

35. B. Has a unique number of protons.

36. A. 1:16.

37. E. Nonlinear.

38. A. Current.

39. A. Carbon composition.

40. A. Machines can see at wavelengths to which human eyes are blind.

41. C. A NOT gate.

42. E. A ratio detector.

43. C. Gallium arsenide.

44. C. The dc collector voltage is positive.

45. A. A capacitor in parallel with the rectifier output.

46. D. The impedance is complex.

47. D. 100 V.

48. E. Becomes large positively.

49. E. Derivative.

50. B. Is slanted with respect to the rotational axis.

51. A. Are easily damaged by static electricity.

52. C. Ohms per meter.

53. B. Employs N-channel and P-channel FETs on a single chip.

54. B. Waveform.

55. B. Resistances in parallel.

56. D. FM.

57. A. Usually more important in transmitting systems than in receiving systems.

58. D. High and resistive.

59. C. Current lags voltage by less than 90 degrees.

60. E. 120 degrees.

61. E. Voltage.

62. A. 15 ohms.

63. D. 10 ohms.

64. C. The commutative property.

65. A. A secondary cell.

66. B. 105 ohms.

67. D. ROM.

68. B. Inversely proportional to the distance between them.

69. B. Saturation.

70. D. Large, high-gain antennas are not required.

71. E. There isn’t enough information given here to figure it out.

72. E. All of the foregoing.

73. B. Resistors.

74. E. Energy.

75. D. 12 V rms ac.

76. A. Wave X lags wave Y by 90 degrees.

77. C. Class-B.

78. C. A machine vision system.

79. C. Multivibrator.

80. B. Junction capacitance.

81. E. Very large unit.

82. D. Varactor.

83. D. Compounds.

84. C. Effective value.

85. D. Data storage capacity.

86. A. The circuit had better have a fuse or a circuit breaker.

87. B. Frequency.

88. C. The majority carriers are holes.

89. E. An electromagnet.

90. C. Ease with which a circuit passes ac.

91. C. The emitter is at signal ground.

92. D. -50 ohms.

93. C. A circuit has no reactance.

94. C. Allows a robot to tell from which direction a sound is coming.

95. B. Henry.

96. C. 12 dB.

97. D. A light-emitting diode.

98. E. To discharge the filter capacitors after the supply is shut off.

99. E. 11.1 W.

100. C. Is retained after the power is removed.

Complete List of Multiple Choice Questions from this Book


Published by: Froyd Wess10:20

Teach Yourself Electricity and Electronics Final Examination

Filed under:

Teach Yourself Electricity and Electronics Final Examination

This is the Teach Yourself Electricity and Electronics Final Examination that could test your knowledge and learning after reading the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam. This is also serve as your Pre-board exam in Engineering Electronics.

Begin the Test

1. As the frequency of ac increases in a coil, the reactance:

  • A. Gets larger negatively.
  • B. Gets smaller negatively.
  • C. Stays the same.
  • D. Gets larger positively.
  • E. Gets smaller positively.

2. A beat-frequency oscillator is useful for:

  • A. Generating FM.
  • B. Detecting FM.
  • C. Generating CW.
  • D. Detecting CW.
  • E. Any of the above.

3. A Colpitts circuit is a form of:

  • A. Amplifier.
  • B. Detector.
  • C. Modulator.
  • D. Oscillator.
  • E. Rectifier.

4. The high component density of integrated circuits acts to:

  • A. Maximize the power output.
  • B. Increase the current drain.
  • C. Increase the voltage requirements.
  • D. Increase the operating speed.
  • E. Reduce the frequency range.

5. A utility meter generally measures:

  • A. Watts.
  • B. Amperes.
  • C. Kilowatt hours.
  • D. Kilowatts.
  • E. Volt hours.

6. High voltages are better than low voltages for long-distance electric power transmission because:

  • A. The lines can better withstand lightning strokes.
  • B. The magnetic fields are weaker.
  • C. The electric fields are weaker.
  • D. The I2R losses are lower.
  • E. No. Low voltages are better.

7. A member of a fleet of robots, all under the control of a single central

computer and able to communicate only with that computer and not with

each other, is called:

  • A. An android.
  • B. An autonomous robot.
  • C. A dependent robot.
  • D. An independent robot.
  • E. An insect robot.

8. An advantage of a laser printer over a dot-matrix printer for computer

applications is:

  • A. Lower cost.
  • B. Superior image quality.
  • C. Greater bandwidth.
  • D. Lower resolution.
  • E. Better voltage regulation.

9. The output electrode of a bipolar transistor is usually the:

  • A. Grid.
  • B. Gate.
  • C. Base.
  • D. Source.
  • E. Collector.

10. The schematic symbol for an op amp is:

  • A. A triangle.
  • B. A circle.
  • C. A circle with a line through it.
  • D. A rectangle.
  • E. A D-shaped figure.

11. For a given value of capacitance, as the frequency goes down, the reactance:

  • A. Approaches zero from the negative side.
  • B. Gets more and more negative.
  • C. Approaches zero from the positive side.
  • D. Gets more and more positive.
  • E. Stays the same.

12. In a 360-Hz wave, a degree of phase represents:

  • A. 1.00 second.
  • B. 1/360 second.
  • C. 360 milliseconds.
  • D. 7.72 microseconds.
  • E. A quantity you can’t calculate from this data.

13. A device that converts visible light into dc is:

  • A. A phototransistor.
  • B. A photovoltaic cell.
  • C. An optovoltaic cell.
  • D. An optocell.
  • E. An optoisolator.

14. Which of the following is not an example of wireless?

  • A. The connection between a computer and its monitor.
  • B. A cellular telephone system.
  • C. The Global Positioning System.
  • D. A beeper.
  • E. A LEO satellite system.

15. A circuit has a battery of 3.0 V and a bulb with a resistance of 12.0 ohms. The current through the bulb is:

  • A. 36 A.
  • B. 4.0 A.
  • C. 250 mA.
  • D. 40 mA.
  • E. 36 mA.

16. A small 9-V battery might be used to provide power to:

  • A. An electronic calculator.
  • B. A personal computer.
  • C. A radio transmitter.
  • D. An electric iron.
  • E. Any of the above.

17. In an AM voice signal, the audio information is:

  • A. Exactly at the carrier frequency.
  • B. Contained in sidebands.
  • C. At harmonics of the carrier frequency.
  • D. Rectified before being impressed onto the carrier.
  • E. Detected before being impressed onto the carrier.

18. The oscillating frequency of a quartz crystal can be varied slightly by:

  • A. Changing the bias on the transistor.
  • B. Changing the voltage across the varactor.
  • C. Reversing the power supply polarity.
  • D. Placing a small variable capacitor across the crystal.
  • E. No. The frequency of a crystal cannot be changed at all.

19. When several resistances are connected in series:

  • A. The current is the same through each one.
  • B. The voltage is the same across each one.
  • C. Both A and B are true.
  • D. Neither A nor B is true.
  • E. They must all have the same value.

20. In a power supply, resistors are sometimes connected in series with the diodes in order to:

  • A. Increase the current output.
  • B. Protect the diodes against surge currents.
  • C. Help the diodes discharge.
  • D. Bleed charge from the filter capacitors.
  • E. Regulate the output voltage.

21. In a purely resistive impedance, there is:

  • A. A net capacitance.
  • B. A net inductance.
  • C. Zero resistance.
  • D. Zero reactance.
  • E. Zero conductance.

22. Two 400-μH inductors are connected in series. There is no mutual inductance. The total inductance is:

  • A. 100 μH.
  • B. 200 μH.
  • C. 400 μH.
  • D. 800 μH.
  • E. 1.6 mH.

23. The current-carrying part of a field-effect transistor, analogous to a garden hose in some ways, is called the:

  • A. Source.
  • B. Gate.
  • C. Drain.
  • D. Source-drain junction.
  • E. Channel.

24. In a rectifier diode, current flows for approximately how much of the ac cycle?

  • A. 360 degrees.
  • B. 270 degrees.
  • C. 180 degrees.
  • D. 90 degrees.
  • E. 45 degrees.

25. A millivolt is:

  • A. 103 V.
  • B. 10-3 V.
  • C. 106 V.
  • D. 10-6 V.
  • E. 10-9 V.

26. The reciprocal of reactance is called:

  • A. Impedance.
  • B. Conductance.
  • C. Resistance.
  • D. Admittance.
  • E. Susceptance.

27. Another name for joules per second is:

  • A. Volts.
  • B. Amperes.
  • C. Ohms.
  • D. Gilberts.
  • E. Watts.

28. In a pure inductance:

  • A. Current lags voltage by 90 degrees.
  • B. Current lags voltage by less than 90 degrees.
  • C. Current and voltage are in phase.
  • D. Current leads voltage by 90 degrees.
  • E. Current leads voltage by 180 degrees.

29. A form of microwave electron tube is:

  • A. A cavity resonator.
  • B. A triode.
  • C. A Klystron.
  • D. A cathode-ray tube.
  • E. None of the above.

30. Magnetic lines of flux are generally:

  • A. Parallel with the flow of electric current.
  • B. In the plane of the electric current.
  • C. At right angles to the flow of current.
  • D. At a 45 degree angle to the flow of current.
  • E. Impossible to predict as to their direction.

31. A class-A amplifier conducts during how much of the input cycle?

  • A. Less than 90 degrees.
  • B. 90–180 degrees.
  • C. 180–270 degrees.
  • D. 270–360 degrees.
  • E. 360 degrees.

32. An advantage of parallel data transfer over serial transfer is:

  • A. Higher speed.
  • B. Narrower bandwidth.
  • C. Lower frequency.
  • D. Higher power.
  • E. Better signal-to-noise ratio.

33. One way to keep interelectrode capacitance to a minimum is to:

  • A. Use only electrolytic capacitors.
  • B. Avoid the use of sheet metal.
  • C. Use batteries as the source of power.
  • D. Keep wire leads short.
  • E. Use air-core transformers.

34. One advantage of ac (compared with dc) as a source of utility power is that:

  • A. It can be used at safer voltage levels.
  • B. It can be easily stepped up or down in voltage.
  • C. There is lower transmission line loss.
  • D. The waveshape can be varied easily.
  • E. Higher voltages can be used.

35. An element of matter:

  • A. Is a good conductor.
  • B. Has a unique number of protons.
  • C. Is an insulator.
  • D. Makes a good electronic component.
  • E. Can be fabricated onto an IC chip.

36. A transformer quadruples the ac voltage. The primary-to-secondary impedance ratio is therefore:

  • A. 1:16.
  • B. 1:4.
  • C. 1:1.
  • D. 4:1.
  • E. 16:1.

37. Frequency multiplication is possible with a semiconductor diode because the diode is:

  • A. Amplifying.
  • B. Detecting.
  • C. Forward-biased.
  • D. Reverse-biased.
  • E. Nonlinear.

38. An ammeter measures:

  • A. Current.
  • B. Voltage.
  • C. Resistance.
  • D. Power.
  • E. Energy.

39. A good type of resistor to use in a radio amplifier is:

  • A. Carbon composition.
  • B. Wirewound.
  • C. Silver mica.
  • D. Reactive.
  • E. Tantalum.

40. An advantage of machine vision over human vision is the fact that:

  • A. Machines can see at wavelengths to which human eyes are blind.
  • B. Machine vision systems have equal sensitivity at all wavelengths.
  • C. Machine vision can measure pressure.
  • D. Machine vision engineers need not take image resolution into account.
  • E. Machine vision engineers need not take sensitivity into account.

41. A logic circuit has an output 0 when the input is 1, and vice versa. This is:

  • A. A NOR gate.
  • B. An AND gate.
  • C. A NOT gate.
  • D. An XOR gate.
  • E. An XNOR gate.

42. A type of FM detector that has its limiter built in is:

  • A. A balanced modulator.
  • B. A beat-frequency oscillator.
  • C. An envelope detector.
  • D. A product detector.
  • E. A ratio detector.

43. Which of the following materials is/are commonly used as a semiconductor?

  • A. Silver-mica.
  • B. Ferrite.
  • C. Gallium arsenide.
  • D. Tantalum.
  • E. All of the above.

44. In an NPN bipolar transistor circuit:

  • A. The dc collector voltage is negative.
  • B. The output is taken from the base.
  • C. The dc collector voltage is positive.
  • D. The output is taken from the drain.
  • E. Negative feedback must be used.

45. A simple power supply filter can be made using:

  • A. A capacitor in parallel with the rectifier output.
  • B. A resistor in parallel with the rectifier output.
  • C. An inductor in parallel with the rectifier output.
  • D. A capacitor in series with the rectifier output.
  • E. A resistor in series with the rectifier output.

46. If an ac admittance contains finite, nonzero resistance and finite, nonzero susceptance:

  • A. The impedance is a pure resistance.
  • B. The impedance is zero.
  • C. The resistance is zero.
  • D. The impedance is complex.
  • E. No. An ac admittance cannot contain susceptance.

47. Three resistances are in parallel, with values of 100, 200, and 300 ohms. The current through the 200-ohm resistor is 500 mA. What is the voltage across the whole combination?

  • A. There isn’t enough information to figure it out.
  • B. 400 V.
  • C. 400 mV.
  • D. 100 V.
  • E. 100 mV.

48. As the frequency of ac increases, the reactance of an inductor:

  • A. Remains constant.
  • B. Becomes small positively.
  • C. Becomes small negatively.
  • D. Becomes large negatively.
  • E. Becomes large positively.

49. The rate of change in a quantity is called the:

  • A. Effective value.
  • B. Instantaneous value.
  • C. Average value.
  • D. Peak value.
  • E. Derivative.

50. The axis of the geomagnetic field:

  • A. Corresponds exactly with the rotational axis.
  • B. Is slanted with respect to the rotational axis.
  • C. Is perpendicular to the rotational axis.
  • D. Runs parallel to lines of latitude.
  • E. Is circular in shape.

51. One of the main shortcomings of MOSFETs is that they:

  • A. Are easily damaged by static electricity.
  • B. Require high voltages.
  • C. Consume large amounts of current.
  • D. Have very low gain.
  • E. Do not have good sensitivity.

52. Resistivity of wire can be specified in:

  • A. Volts per ohm.
  • B. Ohms per volt.
  • C. Ohms per meter.
  • D. Amperes per ohm.
  • E. Ohms per ampere.

53. A complementary-metal-oxide-semiconductor (CMOS) IC:

  • A. Employs diodes and NPN transistors on a single chip.
  • B. Employs N-channel and P-channel FETs on a single chip.
  • C. Uses two chips connected together in a special way.
  • D. Uses resistors and PNP transistors on a single chip.
  • E. Consists of metal oxide sandwiched between two layers of P-type material.

54. A piano sounds different than a saxophone, even if the notes are at the same frequency, because of a difference in:

  • A. Bias.
  • B. Waveform.
  • C. Voltage.
  • D. Current.
  • E. The way you imagine it.

55. Inductances in parallel, assuming there is no mutual inductance, add up like:

  • A. Resistances in series.
  • B. Resistances in parallel.
  • C. Capacitances in parallel.
  • D. Batteries in parallel.
  • E. No other type of electrical component.

56. A reactance modulator produces:

  • A. CW.
  • B. AM.
  • C. SSB.
  • D. FM.
  • E. PCM.

57. Antenna efficiency is:

  • A. Usually more important in transmitting systems than in receiving systems.
  • B. The difference between the input and output power.
  • C. A direct function of the noise in a transmitting system.
  • D. The proportion of input power that gets converted into heat.
  • E. Highest when the transmitter final amplifier is maximally efficient.

58. In a parallel-resonant LC circuit, the impedance is:

  • A. Low and reactive.
  • B. High and reactive.
  • C. Low and resistive.
  • D. High and resistive.
  • E. Any of the above.

59. In a resistance/inductance (RL) series circuit:

  • A. Current lags voltage by 180 degrees.
  • B. Current lags voltage by 90 degrees.
  • C. Current lags voltage by less than 90 degrees.
  • D. Current and voltage are in phase.
  • E. Current leads voltage by 90 degrees.

60. In three-phase ac, the difference in phase between any two waves is:

  • A. 30 degrees.
  • B. 45 degrees.
  • C. 60 degrees.
  • D. 90 degrees.
  • E. 120 degrees.

61. Electrostatic forces can be measured to directly indicate:

  • A. Power.
  • B. Frequency.
  • C. Current.
  • D. Resistance.
  • E. Voltage.

62. A circuit has a complex impedance of 9 + j12. The absolute-value impedance is:

  • A. 15 ohms.
  • B. 9 ohms.
  • C. 12 ohms.
  • D. 21 ohms.
  • E. Impossible to calculate from this data.

63. Three resistors, each of 30 ohms, are connected in parallel. The net resistance is:

  • A. 90 ohms.
  • B. 60 ohms.
  • C. 33 ohms.
  • D. 10 ohms.
  • E. Impossible to determine from the data given.

64. The logical statement X + Y = Y + X depicts:

  • A. The distributive property.
  • B. The associative property.
  • C. The commutative property.
  • D. The de Morgan theorem.
  • E. The behavior of a NOR gate.

65. A cell that can be recharged, and therefore used again and again, is called:

  • A. A secondary cell.
  • B. A multiple-use cell.
  • C. A primary cell.
  • D. A tertiary cell.
  • E. A battery.

66. A resistor has a positive temperature coefficient of 1.00 percent per degree C.If its value is 100 ohms at 20 degrees C, what is its value at 25 degrees C?

  • A. 100 ohms.
  • B. 105 ohms.
  • C. 95 ohms.
  • D. 125 ohms.
  • E. It can’t be calculated from this data.

67. A memory that can be easily accessed, but not written over, is called:

  • A. RAM.
  • B. PRAM.
  • C. CMOS.
  • D. ROM.
  • E. CROM.

68. The capacitance between two parallel sheets of metal is:

  • A. Directly proportional to the distance between them.
  • B. Inversely proportional to the distance between them.
  • C. Not dependent on the distance between them.
  • D. Inversely proportional to their surface area.
  • E. Negligible unless the sheets are both gigantic.

69. The forward base bias in a transistor is increased until the collector current levels off. This condition is:

  • A. Cutoff.
  • B. Saturation.
  • C. Pinchoff.
  • D. Forward breakover.
  • E. Avalanche.

70. An advantage of a LEO communications satellite system over a geostationary communications satellite is the fact that:

  • A. The bandwidth is greater.
  • B. The image resolution is superior.
  • C. The satellites never change their position in the sky.
  • D. Large, high-gain antennas are not required.
  • E. The satellites orbit at higher altitudes.

71. A coil has 20 mH of inductance. What is the inductive reactance?

  • A. 20 ohms.
  • B. 0.05 ohms.
  • C. 50 ohms.
  • D. 20k ohms.
  • E. There isn’t enough information given here to figure it out.

72. What is an advantage of digital signal processing (DSP)?

  • A. Improved signal-to-noise ratio.
  • B. Enhanced fidelity.
  • C. Improved intelligibility.
  • D. Relative immunity to atmospheric noise.
  • E. All of the foregoing.

73. A dc voltage-divider network is made using:

  • A. Inductors.
  • B. Resistors.
  • C. Capacitors.
  • D. Bipolar transistors.
  • E. FETs.

74. The electron volt is a unit of:

  • A. Voltage.
  • B. Current.
  • C. Power.
  • D. Electric field strength.
  • E. Energy.

75. A transformer has a primary-to-secondary turns ratio of 10:1. The input is 120V rms ac. The output is:

  • A. 12 kV rms ac.
  • B. 1.2 kV rms ac.
  • C. 120 V rms ac.
  • D. 12 V rms ac.
  • E. 1.2 V rms ac.

76. Wave X leads wave Y by 270 degrees. This would be better expressed by saying that:

  • A. Wave X lags wave Y by 90 degrees.
  • B. Wave X lags wave Y by 180 degrees.
  • C. Wave X lags wave Y by 270 degrees.
  • D. Waves X and Y are out of phase.
  • E. Waves X and Y are in phase.

77. Which type of amplifier circuit has the transistor or FET biased exactly at cutoff or pinchoff when there is no signal input?

  • A. Class-A.
  • B. Class-AB.
  • C. Class-B.
  • D. Class-C.
  • E. Class-D.

78. The term resolution might apply to:

  • A. A hi-fi amplifier system.
  • B. A power supply.
  • C. A machine vision system.
  • D. An NPN bipolar transistor.
  • E. An electrolytic capacitor.

79. An audio oscillator that uses two amplifiers in cascade, with positive feedback from the output of the second stage to the input of the first stage, is known as a:

  • A. Colpitts circuit.
  • B. Hartley circuit.
  • C. Multivibrator.
  • D. VCO.
  • E. Clapp circuit.

80. The main factor that limits the frequency at which a P-N junction will rectify is the:

  • A. PIV rating.
  • B. Junction capacitance.
  • C. Junction resistance.
  • D. Junction inductance.
  • E. Reverse bias current.

81. The henry is a:

  • A. Very small unit.
  • B. Unit of capacitive reactance.
  • C. Measure of transistor gain.
  • D. Unit of phase.
  • E. Very large unit.

82. A diode that can be used as a variable capacitance is a:

  • A. GaAsFET.
  • B. Silicon rectifier.
  • C. Point-contact diode.
  • D. Varactor.
  • E. Germanium detector.

83. Elements can join together to form:

  • A. Ions.
  • B. Isotopes.
  • C. Nuclei.
  • D. Compounds.
  • E. Majority carriers.

84. The rms value for an ac wave is also sometimes called the:

  • A. Absolute value.
  • B. Direct-current value.
  • C. Effective value.
  • D. Equivalent value.
  • E. Reactive value.

85. The gigabyte is a unit commonly used as a measure of:

  • A. Data access time.
  • B. Data frequency.
  • C. Data transfer speed.
  • D. Data storage capacity.
  • E. Data communications accuracy.

86. In a parallel combination of light bulbs, if one bulb socket totally shorts out:

  • A. The circuit had better have a fuse or a circuit breaker.
  • B. The other bulbs will burn out.
  • C. The other bulbs will dim slightly, but stay lit.
  • D. The current drawn from the source will decrease.
  • E. None of the above.

87. A common lab multimeter cannot measure:

  • A. Current.
  • B. Frequency.
  • C. Voltage.
  • D. Resistance.
  • E. It can measure any of the above.

88. In a P-channel JFET:

  • A. The drain is positive with respect to the source.
  • B. The gate must be grounded.
  • C. The majority carriers are holes.
  • D. The source receives the input signal.
  • E. All of the above are true.

89. If you place a bar of iron inside a cylindrical coil of wire, and then run dc through the wire, you have:

  • A. A rheostat.
  • B. A permanent magnet.
  • C. A flux meter.
  • D. An electric generator.
  • E. An electromagnet.

90. Admittance is a quantity expressing:

  • A. Opposition to dc.
  • B. Opposition to audio signals.
  • C. Ease with which a circuit passes ac.
  • D. The ratio of capacitance to inductance.
  • E. The ratio of reactance to resistance.

91. In a common-emitter bipolar-transistor circuit:

  • A. The collector is at signal ground.
  • B. The output is taken from the base.
  • C. The emitter is at signal ground.
  • D. The bases of two transistors are connected together.
  • E. The output is taken from the emitter.

92. In a certain resistance-capacitance (RC) circuit, the current leads the voltage by 45 degrees. The resistance is 50 ohms. The capacitive reactance is:

  • A. 25 ohms.
  • B. -25 ohms.
  • C. 50 ohms.
  • D. -50 ohms.
  • E. Impossible to determine from this information.

93. The VA power is equal to the true power only when:

  • A. A circuit has no resistance.
  • B. A circuit has no impedance.
  • C. A circuit has no reactance.
  • D. The complex impedance is high.
  • E. The phase angle is 45 degrees.

94. Binaural machine hearing can be advantageous over monaural machine hearing because the binaural scheme:

  • A. Allows a robot to measure the frequency of a sound.
  • B. Allows a robot to determine the amplitude of a sound.
  • C. Allows a robot to tell from which direction a sound is coming.
  • D. Allows a robot to ascertain the waveform of a sound.
  • E. Allows a robot to interpret spoken commands.

95. The standard unit of inductance is the:

  • A. Farad.
  • B. Henry.
  • C. Gilbert.
  • D. Gauss.
  • E. Tesla.

96. The output of an amplifier circuit is 20 V and the input is 5.0 V. The input and output impedances are identical. The circuit thus has a gain of:

  • A. 4 dB.
  • B. 6 dB.
  • C. 12 dB.
  • D. -4 dB.
  • E. -6 dB.

97. An example of a device that converts electrical energy into visible radiant energy is:

  • A. A photocell.
  • B. A phototransistor.
  • C. A photovoltaic cell.
  • D. A light-emitting diode.
  • E. A speaker.

98. What is the function of bleeder resistors in a power supply?

  • A. To regulate the current.
  • B. To regulate the voltage.
  • C. To protect the rectifier diodes against electromagnetic interference.
  • D. To protect the rectifier diodes against current surges.
  • E. To discharge the filter capacitors after the supply is shut off.

99. A resistor of 100 ohms carries 333 mA dc. The power dissipated by that resistor is:

  • A. 300 mW.
  • B. 3.33 W.
  • C. 33.3 W.
  • D. 3.33 W.
  • E. 11.1 W.

100. The data in nonvolatile memory:

  • A. Is stored on magnetic disks.
  • B. Consists of analog waveforms.
  • C. Is retained after the power is removed.
  • D. Must pass through a modem before it can be understood by the CPU.
  • E. Cannot be used by a microprocessor.

Complete List of Multiple Choice Questions from this Book

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Teach Yourself Electricity and Electronics Examination Part 4 - Answers

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Answers key in Teach Yourself Electricity and Electronics Examination Part 4 MCQs

Below are the answers key for the Part 4 Examination Test that includes the last 4 Chapters of the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco.

1. B. Binocular.

2. A. Decibels.

3. A. Low individual intelligence but high group intelligence.

4. C. An audio mixer.

5.  B. Is dangerous.

6. C. Sensitivity.

7. B. The frequency of the disturbance.

8. E. Spherical coordinates.

9. D. Full duplex.

10. A. The Global Positioning System.

11. D. In a polar orbit.

12. C. Linearity.

13. B. Central processing unit.

14. C. An antenna.

15. B. The amplifier used by a band at a rock concert.

16. E. None of the above.

17. A. True three-dimensional hi-fi audio reproduction.

18. E. Number of dimensions involved.

19. D. Shielded whenever possible.

20. A. The antenna is 98 percent efficient.

21. A. Degrees of rotation.

22. E. Destination.

23. A. The number of times per second that an image is renewed in a computer display.

24. C. Microprocessor.

25. C. Sectors.

26. E. Cylindrical coordinate geometry.

27. B. The stored data vanishes when power is removed.

28. D. Noise level.

29. D. Degrades performance.

30. C. Cryotechnology.

31, B. Computer monitors.

32. B. As long as nobody gets hurt or killed as a result.

33. B. It can interfere with other people’s cell phones.

34. E. Never. An orbiting satellite always moves relative to the earth’s surface.

35. A. Selectivity.

36. D. A hard drive.

37. B. SSB.

38. A. Image resolution.

39. E. Waveform of the sound.

40. C. FM.

41. E. Turntable.

42. D. Conditions A, B, and C are all true.

43. E. Vibrating molecules.

44. B. Synthesized.

45. C. Three-dimensional space.

46. A. The time period in which a particular type of robot was developed.

47. E. Logarithm.

48. D. 390 to 750 nanometers.

49. A. Part of the Internet.

50. C. Keep the image from rolling.

Complete List of Multiple Choice Questions from this Book


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Teach Yourself Electricity and Electronics Examination Part 4

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Multiple choice questions in Teach Yourself Electricity and Electronics Examination Part 4

This is the Part 4 Examination Test (Advanced Electronics and Related Technology) that includes the last 4 Chapters of the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.

Topics Included in the Test from Chapter 31 to Chapter 34

Part 4: Advanced Electronics and Related Technology

Begin the Test

1. A machine vision system that uses two cameras to allow a robot to sense depth is:

  • A. Binaural.
  • B. Binocular.
  • C. Monaural.
  • D. Monocular.
  • E. High resolution.

2. A VU meter contains a scale that measures relative:

  • A. Decibels.
  • B. Current.
  • C. Voltage.
  • D. Power.
  • E. Frequency.

3. A fleet of insect robots generally has:

  • A. Low individual intelligence but high group intelligence.
  • B. High individual intelligence but low group intelligence.
  • C. Low individual intelligence and low group intelligence.
  • D. High individual intelligence and high group intelligence.
  • E. None of the above.

4. When two or more audio sources drive a single amplifier, it is good engineering practice to use:

  • A. A synthesizer.
  • B. An audio-frequency choke.
  • C. An audio mixer.
  • D. A graphic equalizer.
  • E. A phase control.

5. The use of a stereo headset to listen to music while driving:

  • A. Is good because it keeps passengers from distracting the driver.
  • B. Is dangerous.
  • C. Keeps the driver’s mind on the road.
  • D. Is good because it prevents road rage.
  • E. Is better than using car speakers.

6. A quantitative measure of the ability of a machine vision system to detect dim light is its:

  • A. Selectivity.
  • B. Resolution.
  • C. Sensitivity.
  • D. Field of view.
  • E. Amplitude ratio.

7. The pitch of an audio sine-wave tone depends on:

  • A. The amplitude of the disturbance.
  • B. The frequency of the disturbance.
  • C. The polarization of the disturbance.
  • D. The medium through which the sound travels.
  • E. The waveform of the disturbance.

8. Three-dimensional range plotting is generally done in:

  • A. Linear coordinates.
  • B. Rectangular coordinates.
  • C. Polar coordinates.
  • D. Celestial coordinates.
  • E. Spherical coordinates.

9. A form of communications in which either party can “hear” while “talking,” thus allowing one party to instantly interrupt the other at any time, is called:

  • A. Half simplex.
  • B. Full simplex.
  • C. Half duplex.
  • D. Full duplex.
  • E. Nothing. There is no such mode of communications.

10. Which of the following is an example of wireless technology?

  • A. The Global Positioning System.
  • B. A field-effect transistor.
  • C. A junction diode.
  • D. A carbon-composition resistor.
  • E. Digital-to-analog conversion.

11. A satellite in a LEO system is usually:

  • A. At an altitude of 22,300 miles.
  • B. Geosynchronous.
  • C. In a retrograde orbit.
  • D. In a polar orbit.
  • E. Midway between the earth and the moon.

12. Which consideration is the most important in a hi-fi audio amplifier?

  • A. Power output.
  • B. Efficiency.
  • C. Linearity.
  • D. Input impedance.
  • E. Output impedance.

13. The microprocessor in a computer is part of the:

  • A. Random-access memory.
  • B. Central processing unit.
  • C. Read-only memory.
  • D. Hard drive.
  • E. Internet controller.

14. An RF transducer is:

  • A. Sensitive only within the range of human hearing.
  • B. Sensitive only to visible light.
  • C. An antenna.
  • D. An analog-to-digital converter.
  • E. A digital-to-analog converter.

15. Vacuum tubes might be found in:

  • A. A portable headset tape player.
  • B. The amplifier used by a band at a rock concert.
  • C. A meter for measuring sound intensity.
  • D. A robot controller.
  • E. A GPS receiver.

16. One kilobyte is the same amount of data as:

  • A. 1024 bits.
  • B. 1024 kilobits.
  • C. 1024 megabits.
  • D. 1024 gigabits.
  • E. None of the above.

17. Hexaphonic sound is not common, but if it were, it would most likely be used for:

  • A. True three-dimensional hi-fi audio reproduction.
  • B. Two-way radio communications.
  • C. Ensuring that an AM/FM tuner can receive at least six stations.
  • D. Improving the dynamic range of a speaker system.
  • E. Robot control.

18. Range sensing and range plotting are basically the same thing except for the:

  • A. Light-detecting sensitivity.
  • B. Image resolution.
  • C. Selectivity.
  • D. Wavelength at which the system functions.
  • E. Number of dimensions involved.

19. In a component-type hi-fi system, cables connecting the various units should be:

  • A. As long as possible.
  • B. Single-conductor only.
  • C. Connected in parallel.
  • D. Shielded whenever possible.
  • E. Connected in series.

20. A radio antenna receives 50 watts of RF power from a transmitter, and radiates 49 watts of that power into space. Which of the following statements is true?

  • A. The antenna is 98 percent efficient.
  • B. The loss resistance is 1 ohm.
  • C. The loss resistance is 1 percent.
  • D. The ground loss is 1 watt.
  • E. The antenna feed line loss is 1 watt.

21. The technical expression for robot-arm joint flexibility is:

A. The antenna is 98 percent efficient.

  • A. Degrees of rotation.
  • B. Radians of rotation.
  • C. Degrees of flexibility.
  • D. Manipulator flexibility.
  • E. The work envelope.

22. In an Internet connection, the receiving computer is also known as the:

  • A. Server.
  • B. Host.
  • C. Peer.
  • D. Node.
  • E. Destination.

23. The term refresh rate refers to:

  • A. The number of times per second that an image is renewed in a computer display.
  • B. The number of times per second that a computer memory contents change.
  • C. The speed at which files on a hard drive are overwritten.
  • D. The number of bits per second transferred in an Internet connection.
  • E. The time it takes to recharge a nickel-cadmium electrochemical cell.

24. The “brain” of a computer is the:

  • A. Hard drive.
  • B. Controller.
  • C. Microprocessor.
  • D. CD-ROM.
  • E. Monitor.

25. On a computer hard drive, the circular tracks are broken into arcs called:

  • A. Clusters.
  • B. Bytes.
  • C. Sectors.
  • D. Divisions.
  • E. Storage units.

26. A robot arm moves in three dimensions according to a polar coordinate scheme with a linear elevation dimension added. This is called:

  • A. Spherical coordinate geometry.
  • B. Rectangular coordinate geometry.
  • C. Cartesian coordinate geometry.
  • D. Concentric coordinate geometry.
  • E. Cylindrical coordinate geometry.

27. In a volatile memory chip:

  • A. The stored data is retained even when power is removed.
  • B. The stored data vanishes when power is removed.
  • C. The stored data capacity is greater than that of a hard drive.
  • D. The stored data capacity declines with the passage of time.
  • E. The reliability has deteriorated and the chip should be replaced.

28. At low volume levels in an audio amplifier system, the dynamic range is limited primarily by the:

  • A. Input impedance.
  • B. Efficiency.
  • C. Input power.
  • D. Noise level.
  • E. Frequency.

29. In a wireless system, noise always:

  • A. Improves the bandwidth.
  • B. Increases data transfer rate.
  • C. Reduces the transmitted signal power.
  • D. Degrades performance.
  • E. Makes communication or data transfer impossible.

30. The noise level in a wireless receiver can be reduced using:

  • A. A more powerful final amplifier.
  • B. A grounded-grid configuration.
  • C. Cryotechnology.
  • D. The Global Positioning System.
  • E. A large antenna.

31. Image resolution is an important specification in:

  • A. Oscillators.
  • B. Computer monitors.
  • C. Receiver sensitivity.
  • D. Rectifier diodes.
  • E. Superheterodyne receivers.

32. According to Asimov’s laws, a robot must obey all orders from humans:

  • A. No matter what.
  • B. As long as nobody gets hurt or killed as a result.
  • C. As long as the power is on.
  • D. Unless its controller is infected with a computer virus.
  • E. As long as it does not cause the robot controller to crash.

33. The use of a cell phone is prohibited in a commercial aircraft in flight because:

  • A. It can annoy other passengers.
  • B. It can interfere with other people’s cell phones.
  • C. The interior of the aircraft produces a dangerous RF resonant cavity.
  • D. It won’t work anyhow.
  • E. It can interfere with flight instruments and communications.

34. A satellite can remain over the same spot on the earth’s surface at all times:

  • A. Only if it orbits at an altitude of 22,300 miles.
  • B. Only if it is a member of a LEO fleet.
  • C. Only if its orbit is retrograde.
  • D. Only if its orbit is polar.
  • E. Never. An orbiting satellite always moves relative to the earth’s surface.

35. Signal-plus-noise-to-noise ratio (S + N/N) is often specified when stating a receiver’s:

  • A. Selectivity.
  • B. Stability.
  • C. Modulation coefficient.
  • D. Sensitivity.
  • E. Polarization.

36. A platter is a part of a device known as:

  • A. A videotape recorder.
  • B. A ceramic filter.
  • C. Tape memory.
  • D. A hard drive.
  • E. A voltage-controlled oscillator.

37. Which type of modulation consists of one voice sideband, with a suppressed carrier?

  • A. AM.
  • B. SSB.
  • C. FM.
  • D. RTTY.
  • E. PCM.

38. In a machine vision system, enhanced sensitivity often involves a sacrifice in the:

  • A. Image resolution.
  • B. Memory capacity.
  • C. Data speed.
  • D. Short-wavelength response.
  • E. Long-wavelength response.

39. A machine hearing system can best identify the sort of device or object producing a sound by analyzing the:

  • A. Distance to the sound source.
  • B. Direction from which the sound is coming.
  • C. Duration of the sound.
  • D. Number of sources from which the sound is coming.
  • E. Waveform of the sound.

40. A ratio detector is a circuit for demodulating:

  • A. AM.
  • B. HM.
  • C. FM.
  • D. SSB.
  • E. AFSK.

41. A belt drive might be found in a:

  • A. Synthesized AM/FM tuner.
  • B. Robotic vision system.
  • C. CD player.
  • D. Graphic equalizer.
  • E. Turntable.

42. A robot can be considered autonomous if:

  • A. It is self-contained.
  • B. It has its own computer system.
  • C. It does not rely on a central computer to receive its commands.
  • D. Conditions A, B, and C are all true.
  • E. Any one of conditions A, B, or C is true.

43. Sound waves in air consist of:

  • A. Fluctuating magnetic fields.
  • B. Fluctuating electric fields.
  • C. Fluctuating electric and magnetic fields.
  • D. Vibrating electron orbits.
  • E. Vibrating molecules.

44. An AM/FM hi-fi tuner that derives its frequency from a quartz crystal and phase-locking circuits is said to be:

  • A. Broadband.
  • B. Synthesized.
  • C. Phased.
  • D. Modulated.
  • E. Analog.

45. Epipolar navigation is a means by which a machine can locate objects and plot a course in:

  • A. The total darkness of the deep ocean.
  • B. A straight line.
  • C. Three-dimensional space.
  • D. A circular path.
  • E. The north and south polar regions only.

46. The term robot generation refers to:

  • A. The time period in which a particular type of robot was developed.
  • B. A robot-controlled electric power plant.
  • C. The manufacture of robots by other robots.
  • D. The manufacture of robots by human beings.
  • E. The number of times a robot has copied itself.

47. Which word best completes the following sentence? “The human ear/brain perceives sound volume according to the _________ of the actual intensity.”

  • A. Sum.
  • B. Product.
  • C. Square.
  • D. Square root.
  • E. Logarithm.

48. Human eyes can see electromagnetic radiation over a wavelength range of approximately:

  • A. 390 to 750 meters.
  • B. 390 to 750 millimeters.
  • C. 390 to 750 micrometers.
  • D. 390 to 750 nanometers.
  • E. 390 to 750 kilometers.

49. The World Wide Web is:

  • A. Part of the Internet.
  • B. A company that manufactures communications equipment.
  • C. An agreement between nations concerning data protocols.
  • D. Another name for the Global Positioning System.
  • E. A satellite television network.

50. Synchronizing pulses in a video signal:

  • A. Keep the brightness constant.
  • B. Keep the contrast constant.
  • C. Keep the image from rolling.
  • D. Ensure that the colors are right.
  • E. Keep the image in good focus.

Complete List of Multiple Choice Questions from this Book

Check your work.


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Robotics and Artificial Intelligence - MCQs in Electronics - Answers

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Answers key in Robotics and Artificial Intelligence MCQs

Below are the answers key for the Multiple Choice Questions (MCQs) in Chapter 34: Robotics and Artificial Intelligence from the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco.

1. human body.

2. Never.

3. 1980.

4. Resolution.

5. Edge detection.

6. An expert system.

7. Autonomous robot.

8. Robot arm.

9. An environment with children.

10. Distance measurement.

11. Telepresence.

12. The speed of light.

13. Insect robots.

14. Can be done from a single observation frame.

15. Three dimensions.

16. Degrees of freedom.

17. Work envelope.

18. Cartesian coordinate geometry.

19. Blue, red, and green.

20. Clinometer.

Complete List of Multiple Choice Questions from this Book


Published by: Froyd Wess09:52

Friday, October 24, 2014

Robotics and Artificial Intelligence - MCQs in Electronics

Filed under:

Multiple choice questions in Robotics and Artificial Intelligence

This is the Multiple Choice Questions (MCQs) in Chapter 34: Robotics and Artificial Intelligence from the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.

Begin the Test

1. An android takes the form of:

  • A. An insect.
  • B. A human body.
  • C. A simple robot arm.
  • D. Binocular vision.

2. According to Asimov’s three laws, under what circumstances is it all right for a robot to injure a human being?

  • A. Never.
  • B. When the human being specifically requests it.
  • C. In case of an accident.
  • D. In case the robot controller is infected with a computer virus.

3. Second-generation robots first were used around the year:

  • A. 1950.
  • B. 1960.
  • C. 1970.
  • D. 1980.

4. The extent to which a machine vision system can differentiate between two objects is called the:

  • A. Magnification.
  • B. Sensitivity.
  • C. Selectivity.
  • D. Resolution.

5. An automotive robot might best keep itself traveling down a specific lane of traffic by using:

  • A. Binaural hearing.
  • B. Epipolar navigation.
  • C. Edge detection.
  • D. A second-generation end effector.

6. A rule-based system is also known as:

  • A. Artificial intelligence.
  • B. An expert system.
  • C. An analytical engine.
  • D. An automated guided vehicle.

7. A robot that has its own computer, and can work independently of other robots or computers, is called an:

  • A. Android.
  • B. Insect robot.
  • C. Automated guided vehicle.
  • D. Autonomous robot.

8. A manipulator is also known as a:

  • A. Track drive.
  • B. Robot arm.
  • C. Vision system.
  • D. Robot controller.

9. An android is well suited for operation in:

  • A. Extreme weather conditions.
  • B. Total darkness.
  • C. An assembly line.
  • D. An environment with children.

10. Proximity sensing is most closely akin to:

  • A. Direction measurement.
  • B. Epipolar navigation.
  • C. Distance measurement.
  • D. Machine vision.

11. A telechir is used in conjunction with:

  • A. An automated guided vehicle.
  • B. Telepresence.
  • C. An insect robot.
  • D. An autonomous robot.

12. An absolute limit to the distance over which teleoperation is practical is imposed by:

  • A. The speed of light.
  • B. The image resolution of the vision system.
  • C. The ability of a robot to determine texture.
  • D. All of the above.

13. Rodney Brooks is best known for his work with:

  • A. Epipolar navigation.
  • B. Binocular vision.
  • C. Range sensing and plotting.
  • D. Insect robots.

14. An asset of epipolar navigation is the fact that it:

  • A. Does not require binaural hearing.
  • B. Does not require a computer.
  • C. Can be done from a single observation frame.
  • D. Requires no reference points at all.

15. Spherical coordinates can uniquely define the position of a point in up to:

  • A. One dimension.
  • B. Two dimensions.
  • C. Three dimensions.
  • D. Four dimensions.

16. The number of ways in which a robot arm can move is known as:

  • A. Degrees of rotation.
  • B. Degrees of freedom.
  • C. Degrees of arc.
  • D. Coordinate geometry.

17. The region throughout which a robot arm can accomplish tasks is called its:

  • A. Coordinate geometry.
  • B. Reference axis.
  • C. Reference frame.
  • D. Work envelope.

18. A robot arm that moves along three independent axes, each of which is straight and perpendicular to the other two, employs:

  • A. Revolute geometry.
  • B. Spherical coordinate geometry.
  • C. Cartesian coordinate geometry.
  • D. Cylindrical coordinate geometry.

19. A color vision system can use three gray-scale cameras, equipped with filters that allow which three colors of light to pass?

  • A. Blue, red, and yellow.
  • B. Blue, red, and green.
  • C. Cyan, magenta, and yellow.
  • D. Orange, green, and violet.

20. A robot can determine the steepness of a slope using a(n):

  • A. Epipolar navigation system.
  • B. Clinometer.
  • C. End effector.
  • D. Manipulator.

Complete List of Multiple Choice Questions from this Book

Check your work.


Published by: Froyd Wess13:21