MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the frequency of rotation of the directional beam in a VOR? |
| A. | 20rps |
| B. | 15rps |
| C. | 30rps |
| D. | 50rps |
| Answer» D. 50rps | |
| 2. |
Which of the following can be used to reinforce the upward beam in a marker beacon? |
| A. | Reflector |
| B. | Amplifier |
| C. | Counterpoise |
| D. | Vertical polarization |
| Answer» D. Vertical polarization | |
| 3. |
What frequency does the marker beacon use for fixes along the airways? |
| A. | 50MHz |
| B. | 25MHz |
| C. | 500MHz |
| D. | 75MHz |
| Answer» E. | |
| 4. |
Which of the following is not true with respect to loop antennas? |
| A. | Horizontal polarization is assumed |
| B. | Resonance is achieved by a variable capacitor |
| C. | The horizontal antenna pattern is a figure of eight |
| D. | The currents are equal in amplitude and phase when the antenna is 90° with the transmitted signal |
| Answer» B. Resonance is achieved by a variable capacitor | |
| 5. |
WHAT_FREQUENCY_DOES_THE_MARKER_BEACON_USE_FOR_FIXES_ALONG_THE_AIRWAYS??$ |
| A. | 50MHz |
| B. | 25MHz |
| C. | 500MHz |
| D. | 75MHz |
| Answer» E. | |
| 6. |
What is the frequency of rotation of the directional beam in a VOR?$ |
| A. | 20rps |
| B. | 15rps |
| C. | 30rps |
| D. | 50rps |
| Answer» D. 50rps | |
| 7. |
Which of the following can be used to reinforce the upward beam in a marker beacon?$ |
| A. | Reflector |
| B. | Amplifier |
| C. | Counterpoise |
| D. | Vertical polarization |
| Answer» D. Vertical polarization | |
| 8. |
What is the frequency in which the DME transmits? |
| A. | 50Mhz above or below the received frequency |
| B. | 20Mhz above the received frequency |
| C. | 40Mhz below the received frequency |
| D. | 63Mhz above or below the received frequency |
| Answer» E. | |
| 9. |
Why are pulse pairs used in DME instead of single pulses? |
| A. | Reduce interference |
| B. | Better range |
| C. | Reduced noise |
| D. | Redundancy |
| Answer» B. Better range | |
| 10. |
What is the time gap between each pulse in an interrogation pulse pair for a DME? |
| A. | 12μsec |
| B. | 5μsec |
| C. | 15μsec |
| D. | 10μsec |
| Answer» B. 5‚âà√≠¬¨‚à´sec | |
| 11. |
Which of the following generates the same field pattern as a vertical dipole antenna? |
| A. | Yagi antenna |
| B. | Helix antenna |
| C. | Alford loop |
| D. | Microstrip antenna |
| Answer» D. Microstrip antenna | |
| 12. |
Which of the following is not an advantage of NDB? |
| A. | Inexpensive |
| B. | Omnidirectional |
| C. | Accuracy depends on airborne equipment |
| D. | No mountain and night effect |
| Answer» E. | |
| 13. |
The area of reduced signal strength in a non directional beacon is called as ______ |
| A. | Cone of silence |
| B. | Zero reception zone |
| C. | Zone of silence |
| D. | Non radio zone |
| Answer» B. Zero reception zone | |
| 14. |
What is used to combine the output of the two fixed loop antenna that are placed at right angles to each other? |
| A. | Oscilloscope |
| B. | Spectrum analyzer |
| C. | Mixer |
| D. | Goniometer |
| Answer» E. | |
| 15. |
What can be added to reduce signal ambiguity in a loop antenna? |
| A. | Low noise amplifier |
| B. | Amplifiers |
| C. | Sense antenna |
| D. | Increase the antenna size |
| Answer» D. Increase the antenna size | |
| 16. |
Which of the following type of direction finder has a system that rotates the loop, using a servo system until a null is found? |
| A. | Fixed loop |
| B. | Rotatable loop |
| C. | Rotating loop |
| D. | Fixed, crossed loop |
| Answer» D. Fixed, crossed loop | |
| 17. |
Which of the following is not true with respect to airborne direction finder? |
| A. | They are also called homing adapters |
| B. | Uses the simplest of systems |
| C. | Very low error |
| D. | Take bearings on the ground transmitter |
| Answer» D. Take bearings on the ground transmitter | |
| 18. |
Which type of direction finders takes bearings on airborne transmitters and advice the aircraft of its bearing from the ground station? |
| A. | Ground based |
| B. | Airborne direction finders |
| C. | Homing adapters |
| D. | Homing beacon |
| Answer» B. Airborne direction finders | |