This is the Multiple Choice Questions (MCQs) in Chapter 7: Cells and Batteries 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.
Start Practice Exam Test Questions
1. The chemical energy in a battery or cell:
- A. Is a form of kinetic energy.
- B. Cannot be replenished once it is gone.
- C. Changes to kinetic energy when the cell is used.
- D. Is caused by electric current.
2. A cell that cannot be recharged is:
- A. A dry cell.
- B. A wet cell.
- C. A primary cell.
- D. A secondary cell.
3. A Weston cell is generally used:
- A. As a current reference source.
- B. As a voltage reference source.
- C. As a power reference source.
- D. As an energy reference source.
4. The voltage in a battery is:
- A. Less than the voltage in a cell of the same kind.
- B. The same as the voltage in a cell of the same kind.
- C. More than the voltage in a cell of the same kind.
- D. Always a multiple of 1.018 V.
5. A direct short-circuit of a battery can cause:
- A. An increase in its voltage.
- B. No harm other than a rapid discharge of its energy.
- C. The current to drop to zero.
- D. An explosion.
6. A cell of 1.5 V supplies 100 mA for seven hours and twenty minutes, and then it is replaced. It has supplied:
- A. 7.33 Ah.
- B. 733 mAh.
- C. 7.33 Wh.
- D. 733 mWh.
7. A 12-V auto battery is rated at 36 Ah. If a 100-W, 12-Vdc bulb is connected across this battery, about how long will the bulb stay lit, if the battery has been fully charged?
- A. 4 hours and 20 minutes.
- B. 432 hours.
- C. 3.6 hours.
- D. 21.6 minutes.
8. Alkaline cells:
- A. Are cheaper than zinc-carbon cells.
- B. Are generally better in radios than zinc-carbon cells.
- C. Have higher voltages than zinc-carbon cells.
- D. Have shorter shelf lives than zinc-carbon cells.
9. The energy in a cell or battery depends mainly on:
- A. Its physical size.
- B. The current drawn from it. Cells and Batteries
- C. Its voltage.
- D. All of the above.
10. In which of the following places would a “lantern” battery most likely be found?
- A. A heart pacemaker.
- B. An electronic calculator.
- C. An LCD wall clock.
- D. A two-way portable radio.
11. In which of the following places would a transistor battery be the best power-source choice?
- A. A heart pacemaker.
- B. An electronic calculator.
- C. An LCD wristwatch.
- D. A two-way portable radio.
12. In which of the following places would you most likely choose a lithium battery?
- A. A microcomputer memory backup.
- B. A two-way portable radio.
- C. A portable audio cassette player.
- D. A rechargeable flashlight.
13. Where would you most likely find a lead-acid battery?
- A. In a portable audio cassette player.
- B. In a portable video camera/recorder.
- C. In an LCD wall clock.
- D. In a flashlight.
14. A cell or battery that keeps up a constant current-delivering capability almost until it dies is said to have:
- A. A large ampere-hour rating.
- B. Excellent energy capacity.
- C. A flat discharge curve.
- D. Good energy storage per unit volume.
15. Where might you find a NICAD battery?
- A. In a satellite.
- B. In a portable cassette player.
- C. In a handheld radio transceiver.
- D. In more than one of the above.
16. A disadvantage of mercury cells and batteries is that:
- A. They don’t last as long as other types.
- B. They have a flat discharge curve.
- C. They pollute the environment.
- D. They need to be recharged often.
17. Which kind of battery should never be used until it “dies”?
- A. Silver-oxide.
- B. Lead-acid.
- C. Nickel-cadmium.
- D. Mercury.
18. The current from a solar panel is increased by:
- A. Connecting solar cells in series.
- B. Using NICAD cells in series with the solar cells.
- C. Connecting solar cells in parallel.
- D. Using lead-acid cells in series with the solar cells.
19. An interactive solar power system:
- A. Allows a homeowner to sell power to the utility.
- B. Lets the batteries recharge at night.
- C. Powers lights but not electronic devices.
- D. Is totally independent from the utility.
20. One reason why it is impractical to make an extremely high-voltage battery of cells is that:
- A. There’s a danger of electric shock.
- B. It is impossible to get more than 103.5 V with electrochemical cells.
- C. The battery would weigh to much.
- D. There isn’t any real need for such thing.
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