Teach Yourself Electricity and Electronics Examination Part 1

Teach Yourself Electricity and Electronics Examination Part 1

This is the Part 1 Examination that includes the first 8 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 1 to Chapter 8

Part 1: Direct Current

Start Practice Exam Test Questions

1. An application in which an analog meter would almost always be preferred over a digital meter is:

  • A. A signal-strength indicator in a radio receiver.
  • B. A meter that shows power-supply voltage.
  • C. A utility watt-hour meter.
  • D. A clock.
  • E. A device in which a direct numeric display is wanted.

2. Which of the following statements is false?

  • A. The current in a series dc circuit is divided up among the resistances.
  • B. In a parallel dc circuit, the voltage is the same across each component.
  • C. In a series dc circuit, the sum of the voltages across all the components, going once around a complete circle, is zero.
  • D. The net resistance of a parallel set of resistors is less than the value of the smallest resistor.
  • E. The total power consumed in a series circuit is the sum of the wattages consumed by each of the components.

3. The ohm is a unit of:

  • A. Electrical charge quantity.
  • B. The rate at which charge carriers flow.
  • C. Opposition to electrical current.
  • D. Electrical conductance.
  • E. Potential difference.

4. A wiring diagram differs from a schematic diagram in that:

  • A. A wiring diagram is less detailed.
  • B. A wiring diagram shows component values.
  • C. A schematic does not show all the interconnections between the components.
  • D. A schematic shows pictures of components, while a wiring diagram shows the electronic symbols.
  • E. A schematic shows the electronic symbols, while a wiring diagram shows pictures of the components.

5. Which of the following is a good use, or place, for a wirewound resistor?

  • A. To dissipate a large amount of dc power.
  • B. In the input of a radio-frequency amplifier.
  • C. In the output of a radio-frequency amplifier.
  • D. In an antenna, to limit the transmitter power.
  • E. Between ground and the chassis of a power supply.

6. The number of protons in the nucleus of an element is the:

  • A. Electron number.
  • B. Atomic number.
  • C. Valence number.
  • D. Charge number.
  • E. Proton number.

7. A hot-wire ammeter:

  • A. Can measure ac as well as dc.
  • B. Registers current changes very fast.
  • C. Can indicate very low voltages.
  • D. Measures electrical energy.
  • E. Works only when current flows in one direction.

8. Which of the following units indicates the rate at which energy is expended?

  • A. The volt.
  • B. The ampere.
  • C. The coulomb.
  • D. The ampere hour.
  • E. The watt.

9. Which of the following correctly states Ohm’s Law?

  • A. Volts equal amperes divided by ohms.
  • B. Ohms equal amperes divided by volts.
  • C. Amperes equal ohms divided by volts.
  • D. Amperes equal ohms times volts.
  • E. Ohms equal volts divided by amperes.

10. The current going into a point in a dc circuit is always equal to the current:

  • A. Delivered by the power supply.
  • B. Through any one of the resistances.
  • C. Flowing out of that point.
  • D. At any other point.
  • E. In any single branch of the circuit.

11. A loudness meter in a hi-fi system is generally calibrated in:

  • A. Volts.
  • B. Amperes.
  • C. Decibels.
  • D. Watt hours.
  • E. Ohms.

12. A charged atom is known as:

  • A. A molecule.
  • B. An isotope.
  • C. An ion.
  • D. An electron.
  • E. A fundamental particle.

13. A battery delivers 12 V to a bulb. The current in the bulb is 3 A. What is the resistance of the bulb?

  • A. 36 Ω.
  • B. 4 Ω.
  • C. 0.25 Ω.
  • D. 108 Ω.
  • E. 0.75 Ω.

14. Peak values are always:

  • A. Greater than average values.
  • B. Less than average values.
  • C. Greater than or equal to average values.
  • D. Less than or equal to average values.
  • E. Fluctuating.

15. A resistor has a value of 680 ohms, and a tolerance of plus or minus 5 percent. Which of the following values indicates a reject?

  • A. 648 Ω.
  • B. 712 Ω.
  • C. 699 Ω.
  • D. 636 Ω.
  • E. 707 Ω.

16. A primitive device for indicating the presence of an electric current is:

  • A. An electrometer.
  • B. A galvanometer.
  • C. A voltmeter.
  • D. A coulometer.
  • E. A wattmeter.

17. A disadvantage of mercury cells is that they:

  • A. Pollute the environment when discarded.
  • B. Supply less voltage than other cells.
  • C. Can reverse polarity unexpectedly.
  • D. Must be physically large.
  • E. Must be kept right-side-up.

18. A battery supplies 6.0 V to a bulb rated at 12 W. How much current does the bulb draw?

  • A. 2.0 A.
  • B. 0.5 A.
  • C. 72 A.
  • D. 40 mA.
  • E. 72 mA.

19. Of the following, which is not a common use of a resistor?

  • A. Biasing for a transistor.
  • B. Voltage division.
  • C. Current limiting.
  • D. Use as a “dummy” antenna.
  • E. Increasing the charge in a capacitor.

20. When a charge builds up without a flow of current, the charge is said to be:

  • A. Ionizing.
  • B. Atomic.
  • C. Molecular.
  • D. Electronic.
  • E. Static.

21. The sum of the voltages, going around a dc circuit, but not including the power supply, has:

  • A. Equal value, and the same polarity, as the supply.
  • B. A value that depends on the ratio of the resistances.
  • C. Different value from, but the same polarity as, the supply.
  • D. Equal value as, but opposite polarity from, the supply.
  • E. Different value, and opposite polarity, from the supply.

22. A watt hour meter measures:

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

23. Every chemical element has its own unique type of particle, called its:

  • A. Molecule.
  • B. Electron.
  • C. Proton.
  • D. Atom.
  • E. Isotope.

24. An advantage of a magnetic disk over magnetic tape for data storage is that:

  • A. Data is too closely packed on the tape.
  • B. The disk is immune to the effects of magnetic fields.
  • C. Data storage and retrieval is faster on disk.
  • D. Disks store computer data in analog form.
  • E. Tapes cannot be used to store digital data.

25. A 6-V battery is connected across a series combination of resistors. The resistance values are 1, 2, and 3 Ω. What is the current through the 2- Ω resistor?

  • A. 1 A.
  • B. 3 A.
  • C. 12 A.
  • D. 24 A.
  • E. 72 A.

26. A material that has extremely high electrical resistance is known as:

  • A. A semiconductor.
  • B. A paraconductor.
  • C. An insulator.
  • D. A resistor.
  • E. A diamagnetic substance.

27. Primary cells:

  • A. Can be used over and over.
  • B. Have higher voltage than other types of cells.
  • C. All have exactly 1.500 V.
  • D. Cannot be recharged.
  • E. Are made of zinc and carbon.

28. A rheostat:

  • A. Is used in high-voltage and/or high-power dc circuits.
  • B. Is ideal for tuning a radio receiver.
  • C. Is often used as a bleeder resistor.
  • D. Is better than a potentiometer for low-power audio.
  • E. Offers the advantage of having no inductance.

29. A voltage typical of a dry cell is:

  • A. 12 V.
  • B. 6 V.
  • C. 1.5 V.
  • D. 117 V.
  • E. 0.15 V.

30. A geomagnetic storm:

  • A. Causes solar wind.
  • B. Causes charged particles to bombard the earth.
  • C. Can disrupt the earth’s magnetic field.
  • D. Ruins microwave communications.
  • E. Has no effect near the earth’s poles.

31. An advantage of an alkaline cell over a zinc-carbon cell is that:

  • A. The alkaline cell provides more voltage.
  • B. The alkaline cell can be recharged.
  • C. An alkaline cell works at lower temperatures.
  • D. The alkaline cell is far less bulky for the same amount of energy capacity.
  • E. There is no advantage of alkaline over zinc-carbon cells.

32. A battery delivers 12 V across a set of six 4- Ω resistors in a series voltage dividing combination. This provides six different voltages, differing by an increment of:

  • A. 1/4 V.
  • B. 1/3 V.
  • C. 1 V.
  • D. 2 V.
  • E. 3 V.

33. A unit of electrical charge quantity is the:

  • A. Volt.
  • B. Ampere.
  • C. Watt.
  • D. Tesla.
  • E. Coulomb.

34. A unit of sound volume is:

  • A. The volt per square meter.
  • B. The volt.
  • C. The watt hour.
  • D. The decibel.
  • E. The ampere per square meter.

35. A 24-V battery is connected across a set of four resistors in parallel. Each resistor has a value of 32 ohms. What is the total power dissipated by the resistors?

  • A. 0.19 W.
  • B. 3 W.
  • C. 192 W.
  • D. 0.33 W.
  • E. 72 W.

36. The main difference between a “lantern” battery and a “transistor” battery is:

  • A. The lantern battery has higher voltage.
  • B. The lantern battery has more energy capacity.
  • C. Lantern batteries cannot be used with electronic devices such as transistor radios.
  • D. Lantern batteries can be recharged, but transistor batteries cannot.
  • E. The lantern battery is more compact.

37. NICAD batteries are most extensively used:

  • A. In disposable flashlights.
  • B. In large lanterns.
  • C. As car batteries.
  • D. In handheld radio transceivers.
  • E. In remote garage-door-opener control boxes.

38. A voltmeter should have:

  • A. Very low internal resistance.
  • B. Electrostatic plates.
  • C. A sensitive amplifier.
  • D. High internal resistance.
  • E. The highest possible full-scale value.

39. The purpose of a bleeder resistor is to:

  • A. Provide bias for a transistor.
  • B. Serve as a voltage divider.
  • C. Protect people against the danger of electric shock.
  • D. Reduce the current in a power supply.
  • E. Smooth out the ac ripple in a power supply.

40. A dc electromagnet:

  • A. Has constant polarity.
  • B. Requires a core with high retentivity.
  • C. Will not attract or repel a permanent magnet.
  • D. Has polarity that periodically reverses.
  • E. Cannot be used to permanently magnetize anything.

41. The rate at which charge carriers flow is measured in:

  • A. Amperes.
  • B. Coulombs.
  • C. Volts.
  • D. Watts.
  • E. Watt hours.

42. A 12-V battery is connected to a set of three resistors in series. The resistance values are 1,2, and 3 ohms. What is the voltage across the 3- Ω resistor?

  • A. 1 V.
  • B. 2 V.
  • C. 4 V.
  • D. 6 V.
  • E. 12 V.

43. Nine 90-ohm resistors are connected in a 3x3 series-parallel network. The total resistance is:

  • A. 10 Ω.
  • B. 30 Ω.
  • C. 90 Ω.
  • D. 270 Ω.
  • E. 810 Ω.

44. A device commonly used for remote switching of wire communications signals is:

  • A. A solenoid.
  • B. An electromagnet.
  • C. A potentiometer.
  • D. A photovoltaic cell.
  • E. A relay.

45. NICAD memory:

  • A. Occurs often when NICADs are misused.
  • B. Indicates that the cell or battery is dead.
  • C. Does not occur very often.
  • D. Can cause a NICAD to explode.
  • E. Causes NICADs to reverse polarity.

46. A 100-W bulb burns for 100 hours. It has consumed:

  • A. 0.10 kWh.
  • B. 1.00 kWh.
  • C. 10.0 kWh.
  • D. 100 kWh.
  • E. 1000 kWh.

47. A material with high permeability:

  • A. Increases magnetic field quantity.
  • B. Is necessary if a coil is to produce a magnetic field.
  • C. Always has high retentivity.
  • D. Concentrates magnetic lines of flux.
  • E. Reduces flux density.

48. A chemical compound:

  • A. Consists of two or more atoms.
  • B. Contains an unusual number of neutrons.
  • C. Is technically the same as an ion.
  • D. Has a shortage of electrons.
  • E. Has an excess of electrons.

49. A 6.00-V battery is connected to a parallel combination of two resistors, whose values are 8.00 Ω and 12.0 Ω. What is the power dissipated in the 8- Ω resistor?

  • A. 0.300 W.
  • B. 0.750 W.
  • C. 1.25 W.
  • D. 1.80 W.
  • E. 4.50 W.

50. The main problem with a bar-graph meter is that:

  • A. Is isn’t very sensitive.
  • B. It isn’t stable.
  • C. It can’t give a very precise reading.
  • D. You need special training to read it.
  • E. It shows only peak values.

Complete List of Multiple Choice Questions from this Book

Check your work.

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