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
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 3x3 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.