Avionics Fundamentals - Vor, Rmi, DME

1. VOR generates two signals on the carrier frequency?

True

False

30 Hz reference signal and a 9960 Hz subcarrier.

Explanation

30 Hz reference signal and a 9960 Hz subcarrier.

2. The VOR radials are outbound from a station?

True

False

The radial signals of a VOR always point away from the station.

Explanation

The radial signals of a VOR always point away from the station.

3. What is 'Slant Range'?

Same as Ground Distance

Actual line-of-sight distance to the station

Range to the horizon in NM

Slant Range refers to the actual line-of-sight distance to the station. It is the distance between the observer and the target, measured along the line of sight. This measurement takes into account the elevation and the angle between the observer and the target, providing an accurate distance measurement. It is different from Ground Distance, which refers to the distance measured on a flat surface, and Range to the horizon in NM, which refers to the distance to the point where the Earth's curvature obstructs the line of sight.

Explanation

Slant Range refers to the actual line-of-sight distance to the station. It is the distance between the observer and the target, measured along the line of sight. This measurement takes into account the elevation and the angle between the observer and the target, providing an accurate distance measurement. It is different from Ground Distance, which refers to the distance measured on a flat surface, and Range to the horizon in NM, which refers to the distance to the point where the Earth's curvature obstructs the line of sight.

4. DME is usually used in conjuction with:

ADF

ILS

VOR

DME (Distance Measuring Equipment) is typically used in conjunction with VOR (VHF Omnidirectional Range). VOR provides the aircraft with the direction or bearing to a ground-based station, while DME provides the distance from the aircraft to that station. By using both systems together, pilots can determine their exact position in relation to the VOR station, allowing for accurate navigation and flight planning. ADF (Automatic Direction Finder) and ILS (Instrument Landing System) are not typically used in conjunction with DME.

Explanation

DME (Distance Measuring Equipment) is typically used in conjunction with VOR (VHF Omnidirectional Range). VOR provides the aircraft with the direction or bearing to a ground-based station, while DME provides the distance from the aircraft to that station. By using both systems together, pilots can determine their exact position in relation to the VOR station, allowing for accurate navigation and flight planning. ADF (Automatic Direction Finder) and ILS (Instrument Landing System) are not typically used in conjunction with DME.

5. An HSI uses what type of gyroscope?

Vertical Gyro

Horizontal Gyro

Standby Gyro

An HSI (Horizontal Situation Indicator) uses a Horizontal Gyro. This type of gyroscope is specifically designed to measure the aircraft's roll and pitch movements, providing accurate and reliable information about the aircraft's attitude and heading. The Horizontal Gyro is an essential component of the HSI, which displays the aircraft's heading and navigation information to the pilot in a clear and intuitive manner.

Explanation

An HSI (Horizontal Situation Indicator) uses a Horizontal Gyro. This type of gyroscope is specifically designed to measure the aircraft's roll and pitch movements, providing accurate and reliable information about the aircraft's attitude and heading. The Horizontal Gyro is an essential component of the HSI, which displays the aircraft's heading and navigation information to the pilot in a clear and intuitive manner.

6. The VOR frequency range is 9510 Hz to 10410 Hz

True

False

The VOR frequency range is between 108 to 117.95 MHz

Explanation

The VOR frequency range is between 108 to 117.95 MHz

7. The Standby compass indicates True North?

True

False

False. The standby compass in an aircraft typically indicates Magnetic North, not True North. The difference between True North (geographic north pole) and Magnetic North (where the Earth's magnetic field points vertically down) is known as magnetic variation or declination, which must be considered for accurate navigation.

Explanation

False. The standby compass in an aircraft typically indicates Magnetic North, not True North. The difference between True North (geographic north pole) and Magnetic North (where the Earth's magnetic field points vertically down) is known as magnetic variation or declination, which must be considered for accurate navigation.

8. What is the DME frequency range?

960-1215 Mhz

108-112 Mhz

200-1700 Mhz

DME transponders transmit on a channel in the 962 to 1150 MHz range and receive on a corresponding channel between 962 to 1213 MHz.

Explanation

DME transponders transmit on a channel in the 962 to 1150 MHz range and receive on a corresponding channel between 962 to 1213 MHz.

9. The pointers on the RMI indicate?

Radials

Bearing

Heading

The pointers on the RMI indicate the bearing. The bearing is the direction from the aircraft to a specific point on the ground. The RMI (Radio Magnetic Indicator) is a navigation instrument that displays the aircraft's magnetic heading and the bearing to a selected navigation station. It helps the pilot determine the direction to fly in order to reach their desired destination.

Explanation

The pointers on the RMI indicate the bearing. The bearing is the direction from the aircraft to a specific point on the ground. The RMI (Radio Magnetic Indicator) is a navigation instrument that displays the aircraft's magnetic heading and the bearing to a selected navigation station. It helps the pilot determine the direction to fly in order to reach their desired destination.

10. DME supplies range information up to how many miles?

50 NM

125 NM

250 NM

DME (Distance Measuring Equipment) supplies range information up to 250 NM (nautical miles). This means that the DME can provide accurate distance measurements for objects or locations that are within a radius of 250 NM from the aircraft.

Explanation

DME (Distance Measuring Equipment) supplies range information up to 250 NM (nautical miles). This means that the DME can provide accurate distance measurements for objects or locations that are within a radius of 250 NM from the aircraft.

11. What is the Variable Frequency of VOR?

30Hz

60Hz

1020Hz

9960Hz

The variable amplitude modulated (AM) signal is conventionally derived from the lighthouse-like rotation of a directional antenna array 30 times per second (30Hz).

Explanation

The variable amplitude modulated (AM) signal is conventionally derived from the lighthouse-like rotation of a directional antenna array 30 times per second (30Hz).

12. What is the sub-carrier Reference Frequency of VOR?

1020Hz

108.5Mhz

9960Hz

The VOR takes a 9960 Hz carrier and frequency modulates this carrier with the REF 30 Hz signal.

Explanation

The VOR takes a 9960 Hz carrier and frequency modulates this carrier with the REF 30 Hz signal.

13. How is the Variable Frequency of VOR modulated?

Frequency Modulated

Phase Modulated

Amplitude Modulated

30 Hz variable (VAR), which is amplitude modulated by the antenna
9960 subcarrier is frequency modulated (FM)

Explanation

30 Hz variable (VAR), which is amplitude modulated by the antenna
9960 subcarrier is frequency modulated (FM)

14. The Reference and Variable signals are in phase at 180deg magnetic?

True

False

The statement is incorrect because the reference and variable signals cannot be in phase at 180 degrees magnetic. In-phase signals have a phase difference of 0 degrees, while signals with a phase difference of 180 degrees are said to be in opposite phase or out of phase.

Explanation

The statement is incorrect because the reference and variable signals cannot be in phase at 180 degrees magnetic. In-phase signals have a phase difference of 0 degrees, while signals with a phase difference of 180 degrees are said to be in opposite phase or out of phase.

15. RMI comapss information is referred as?

Bearing needle

Vertical gyro

Horizontal gyro

Slaved compass

The correct answer is "Slaved compass". In RMI (Radio Magnetic Indicator), the compass information is referred to as the slaved compass. A slaved compass is a type of compass that is electronically connected to the aircraft's navigation system. It receives signals from the navigation system and automatically adjusts its readings to compensate for any deviations caused by the aircraft's magnetic field. This ensures accurate and reliable compass information for the pilot during flight.

Explanation

The correct answer is "Slaved compass". In RMI (Radio Magnetic Indicator), the compass information is referred to as the slaved compass. A slaved compass is a type of compass that is electronically connected to the aircraft's navigation system. It receives signals from the navigation system and automatically adjusts its readings to compensate for any deviations caused by the aircraft's magnetic field. This ensures accurate and reliable compass information for the pilot during flight.