Module 7c : Maintenance Practices Avionics

30 Questions | Total Attempts: 1284

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Module Quizzes & Trivia

This is a preparation exam for EASA. This is not an actual EASA exam.


Questions and Answers
  • 1. 
    In a permanent magnet moving coil, the pointer is returned to its original position by ___________. 
    • A. 

      The use of a hairspring.

    • B. 

      Adding an opposing magnet.

    • C. 

      Adjusting the "zero-knob"

  • 2. 
    What type of meter uses the principle of magnetic repulsion between like poles?
    • A. 

      D'Arsonval Movement

    • B. 

      Moving-vane Meter Movement

    • C. 

      Permanent Magnet Moving-Coil Movement

  • 3. 
    If the range of current to be measured is greater than the full scale current of the meter, a __________ must be installed in ____________ with the meter.
    • A. 

      Shunt capacitor, parallel

    • B. 

      Shunt resistor, series

    • C. 

      Shunt resistor, parallel

  • 4. 
    What device works on effect of sensed DC magnetic field on a self transmitted AC magnetic field to measure current flow?
    • A. 

      Shunt meter

    • B. 

      Multimeter

    • C. 

      Current Transformer

  • 5. 
    Which device is categorized by 50:5, 100:5, 300:5, etc. as ratio of the current between the conductor and the meter reading?
    • A. 

      Current transformer

    • B. 

      Ammeter

    • C. 

      D'Arsonval Meter

  • 6. 
    What type of meter is used to measure the pressure being applied to the circuit?
    • A. 

      Ammeter

    • B. 

      Wattmeter

    • C. 

      Voltmeter

  • 7. 
    To measure voltage in a circuit, the voltmeter should be connected in ________.
    • A. 

      Series

    • B. 

      Parallel

  • 8. 
    What will happen if the voltmeter is reverse connected into an energized circuit?
    • A. 

      Nothing will happen.

    • B. 

      The meter power supply will discharge.

    • C. 

      The needle might be damaged.

  • 9. 
    What device is connected to the d'Arsonval meter to allow measurement of AC current?
    • A. 

      Transformer

    • B. 

      Rectifier

    • C. 

      Inverter

  • 10. 
    What is the process of "smoothing-out" the oscillation of the pointer in the d'Arsonval meter?
    • A. 

      Rectification

    • B. 

      Damping

    • C. 

      Vibration

  • 11. 
    Which method is used in damping othe vibrations due to rectifiers in an d'Arsonval meter?
    • A. 

      Using an airtight chamber containing a vane

    • B. 

      The moving coil is wound around a thin aluminum bobbin

    • C. 

      By the induced magnetic field in the coil.

  • 12. 
    Which device is commonly known as of an electrodynamic type?
    • A. 

      Ammeter

    • B. 

      Voltmeter

    • C. 

      Wattmeter

  • 13. 
    A wattmeter is rated in ______.
    • A. 

      Watts

    • B. 

      Volts

    • C. 

      Amperes

  • 14. 
    When using an ohmmeter, the needle pointer will deflect to what direction if it reads high resistance?
    • A. 

      To the right.

    • B. 

      To the left.

    • C. 

      Will not move.

  • 15. 
    What is the purpose of the mirror on the scale of an analogue meter?
    • A. 

      To remove parallax error.

    • B. 

      To make it easier to read the value.

    • C. 

      To see if the pointer is moving to the right direction.

  • 16. 
    Which of the following is true about an ohmmeter?
    • A. 

      Connect the ohmmeter in series to measure the resistance.

    • B. 

      Full scale deflection reads minimum resistance.

    • C. 

      Measure resistance in an energized or de-energized ciruits.

  • 17. 
    An ohmmeter with sensitivity of 10,000 per volt means that
    • A. 

      1000 ohms resistance is needed to 1 milliamp of current at FSD

    • B. 

      1 ohm resistance is needed to 1 milliamp of current at FSD

    • C. 

      100 ohms resistance is needde to 1 milliamp of current at FSD

  • 18. 
    What device is used to measure the resistance of the insulation while subjecting it to a high voltage?
    • A. 

      Safety Meter

    • B. 

      Digital Multimeter

    • C. 

      Megger

  • 19. 
    When testing for insulation resistance, it is necessary to test at a voltage approximately
    • A. 

      1.5 times the operating voltage

    • B. 

      15 times the operating voltage

    • C. 

      0.5 times the operating voltage

  • 20. 
    What device is a low reading ohmmeter and measures resistance in milliohms that tests the bonding of aircraft components and structure?
    • A. 

      Safety Ohmmeter

    • B. 

      Milliohmmeter

    • C. 

      Bonding Meter

  • 21. 
    Which device are specifically designed for ultra safe resistance on explosive devices and in hazardous environments?
    • A. 

      Megaohmeter

    • B. 

      Safety Ohmmeter

    • C. 

      Analogue Meter

  • 22. 
    If the arrow is toward the load, a RF Directional Wattmeter is measuring the
    • A. 

      Forward Power

    • B. 

      Reflected Power

    • C. 

      Electrical Power

  • 23. 
    What device is used to measure forward and reflected power of RF radio devices?
    • A. 

      Time Domain Reflectometer

    • B. 

      RF Directional Wattmeter

    • C. 

      ATC/DME Meter

  • 24. 
    What device is used to determine the digital state of an electronic circuit?
    • A. 

      Oscilloscope

    • B. 

      Time Domain Reflectometer

    • C. 

      Logic Probe

  • 25. 
    What device is used to determine the shape of a video pulse or signal appearing at a selected test points?
    • A. 

      Time Domain Reflectometer

    • B. 

      RF Directional Wattmeter

    • C. 

      Oscilloscope