Gibilisco: MCQ in Measuring Devices | ECE Board Exam

(Last Updated On: March 16, 2020)

Multiple choice questions in Measuring Devices

This is the Multiple Choice Questions (MCQs) in Chapter 3: Measuring Devices 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.

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1. The force between two electrically charged objects is called:

  • A. Electromagnetic deflection.
  • B. Electrostatic force.
  • C. Magnetic force.
  • D. Electroscopic force.

2. The change in the direction of a compass needle, when a current-carrying wire is brought near, is:

  • A. Electromagnetic deflection.
  • B. Electrostatic force.
  • C. Magnetic force.
  • D. Electroscopic force.

3. Suppose a certain current in a galvanometer causes the needle to deflect 20 degrees, and then this current is doubled. The needle deflection:

  • A. Will decrease.
  • B. Will stay the same.
  • C. Will increase.
  • D. Will reverse direction.

4. One important advantage of an electrostatic meter is that:

  • A. It measures very small currents.
  • B. It will handle large currents.
  • C. It can detect ac voltages.
  • D. It draws a large current from the source.

5. A thermocouple:

  • A. Gets warm when current flows through it.
  • B. Is a thin, straight, special wire.
  • C. Generates dc when exposed to light.
  • D. Generates ac when heated.

6. One advantage of an electromagnet meter over a permanent-magnet meter is that:

  • A. The electromagnet meter costs much less.
  • B. The electromagnet meter need not be aligned with the earth’s magnetic field.
  • C. The permanent-magnet meter has a more sluggish coil.
  • D. The electromagnet meter is more rugged.

7. An ammeter shunt is useful because:

  • A. It increases meter sensitivity.
  • B. It makes a meter more physically rugged.
  • C. It allows for measurement of a wide range of currents.
  • D. It prevents overheating of the meter.

8. Voltmeters should generally have:

  • A. Large internal resistance.
  • B. Low internal resistance.
  • C. Maximum possible sensitivity.
  • D. Ability to withstand large currents.

9. To measure power-supply voltage being used by a circuit, a voltmeter

  • A. Is placed in series with the circuit that works from the supply.
  • B. Is placed between the negative pole of the supply and the circuit working from the supply.
  • C. Is placed between the positive pole of the supply and the circuit working from the supply.
  • D. Is placed in parallel with the circuit that works from the supply.

10. Which of the following will not cause a major error in an ohmmeter reading?

  • A. A small voltage between points under test.
  • B. A slight change in switchable internal resistance.
  • C. A small change in the resistance to be measured.
  • D. A slight error in range switch selection.

11. The ohmmeter in Fig. 3-17 shows a reading of about:

Gibilisco MCQs image for Q11

  • A. 33,000 Ω.
  • B. 3.3 KΩ.
  • C. 330 Ω
  • D. 33 Ω.

12. The main advantage of a FETVM over a conventional voltmeter is the fact that the FETVM:

  • A. Can measure lower voltages.
  • B. Draws less current from the circuit under test.
  • C. Can withstand higher voltages safely.
  • D. Is sensitive to ac as well as to dc.

13. Which of the following is not a function of a fuse?

  • A. To be sure there is enough current available for an appliance to work right.
  • B. To make it impossible to use appliances that are too large for a given circuit.
  • C. To limit the amount of power that a circuit can deliver.
  • D. To make sure the current is within safe limits.

14. A utility meter’s motor speed works directly from:

  • A. The number of ampere hours being used at the time.
  • B. The number of watt hours being used at the time.
  • C. The number of watts being used at the time.
  • D. The number of kilowatt hours being used at the time.

15. A utility meter’s readout indicates:

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

16. A typical frequency counter:

  • A. Has an analog readout.
  • B. Is usually accurate to six digits or more.
  • C. Works by indirectly measuring current.
  • D. Works by indirectly measuring voltage.

17. A VU meter is never used for measurement of:

  • A. Sound.
  • B. Decibels.
  • C. Power.
  • D. Energy.

18. The meter movement in an illumination meter measures:

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

19. An oscilloscope cannot be used to indicate:

  • A. Frequency.
  • B. Wave shape.
  • C. Energy.
  • D. Peak signal voltage.

20. The display in Fig. 3-18 could be caused by a voltage of:

Gibilisco MCQs image for CH3 Q20

  • A. 6.0 V.
  • B. 6.6 V.
  • C. 7. 0V.
  • D. No way to tell; the meter is malfunctioning.

Complete List of Multiple Choice Questions from this Book

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