Giibilisco - Measuring Devices

18 Questions | Total Attempts: 977

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Measurement Quizzes & Trivia

Questions and Answers
  • 1. 
    The attraction or repulsion 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 called
    • A. 

      Electromagnetic deflection.

    • B. 

      Electrostatic force.

    • C. 

      Magnetic force.

    • D. 

      Electroscopic force.

  • 3. 
    Suppose a certain current in a galvanometer causes the compass needle to deflect by 20 degrees, and then this current is doubled while the polarity stays the same. The angle of the needle deflection will
    • A. 

      Decrease.

    • B. 

      Stay the same.

    • C. 

      Increase.

    • D. 

      Reverse direction.

  • 4. 
    One important advantage of an electrostatic meter is the fact that
    • A. 

      It measures very small currents.

    • B. 

      It can handle large currents.

    • C. 

      It can detect and indicate ac voltages as well as dc voltages.

    • D. 

      It draws a large current from a power supply.

  • 5. 
    A thermocouple
    • A. 

      Gets warm when dc flows through it.

    • B. 

      Is a thin, straight, special wire.

    • C. 

      Generates dc when exposed to visible light.

    • D. 

      Generates ac when heated.

  • 6. 
    An important advantage of an electromagnet-type meter over a permanent-magnet meter is the fact 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. 
    Ammeter shunts are useful because
    • A. 

      They increase meter sensitivity.

    • B. 

      They make a meter more physically rugged.

    • C. 

      They allow for measurement of large currents.

    • D. 

      They prevent overheating of the meter movement.

  • 8. 
    Voltmeters should generally have
    • A. 

      High internal resistance.

    • B. 

      Low internal resistance.

    • C. 

      The greatest possible sensitivity.

    • D. 

      The ability to withstand large currents.

  • 9. 
    In order to measure the power-supply voltage that is applied to an electrical circuit, a voltmeter should be placed
    • A. 

      In series with the circuit that works from the supply.

    • B. 

      Between the negative pole of the supply and the circuit working from the supply.

    • C. 

      Between the positive pole of the supply and the circuit working from the supply.

    • D. 

      In parallel with the circuit that works from the supply.

  • 10. 
    Which of the following will not normally cause a large 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 the range switch position

  • 11. 
    • 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 voltage as well as to dc voltage.

  • 12. 
    Which of the following is not a function of a fuse?
    • A. 

      To ensure 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 device can draw from the electrical circuit

    • D. 

      To make sure the current drawn by an appliance cannot exceed a certain limit

  • 13. 
    A utility meter’s motor speed depends directly on
    • 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.

  • 14. 
    A utility meter’s readout indicates
    • A. 

      Voltage.

    • B. 

      Power.

    • C. 

      Current.

    • D. 

      Energy.

  • 15. 
    A typical frequency counter
    • A. 

      Has an analog readout.

    • B. 

      Is accurate to six digits or more.

    • C. 

      Works by indirectly measuring current.

    • D. 

      Works by indirectly measuring voltage.

  • 16. 
    A VU meter is never used to get a general indication of
    • A. 

      Sound intensity.

    • B. 

      Decibels.

    • C. 

      Power in an audio amplifier.

    • D. 

      Visible light intensity.

  • 17. 
    The meter movement in an illumination meter directly measures
    • A. 

      Current.

    • B. 

      Voltage.

    • C. 

      Power.

    • D. 

      Energy.

  • 18. 
    An oscilloscope cannot be used to indicate
    • A. 

      Frequency.

    • B. 

      Wave shape.

    • C. 

      Energy.

    • D. 

      Peak signal voltage.