FAA Electronic Navigation Exam 2

Question 1

When the course deviation indicator (CDI) needle is centered using a VOR test signal (VOT), the omnibearing selector (OBS) and the TO/FROM indicator should read

Accepted Answer

0° FROM or 180° TO, regardless of the pilot’s position from the VOT.

Answer

A VOR test signal (VOT) transmits a single 360° radial omnidirectionally. When a VOR receiver is tuned to a VOT and the CDI needle is centered, the omnibearing selector (OBS) and the TO/FROM indicator should consistently read either 0° with a FROM indication or 180° with a TO indication. This is because the VOT effectively simulates being on the 360° (or 0°) radial from the station, and this indication is independent of the pilot's physical position relative to the VOT.

Question 2

(Refer to Figure 25, area 5.) The navigation facility at Dallas-Ft. Worth International (DFW) is a

Accepted Answer

VOR/DME.

Answer

Referring to Figure 25, area 5, the navigation facility at Dallas-Ft. Worth International (DFW) is depicted by a hexagon symbol with a square inside. According to standard sectional chart legends, this symbol indicates a VOR/DME (VHF Omnidirectional Range with Distance Measuring Equipment). A VOR/DME provides both bearing information to/from the station and distance information.

Question 3

How many satellites make up the Global Positioning System (GPS)?

Accepted Answer

24.

Answer

The Global Positioning System (GPS) is a satellite-based navigation system that consists of a constellation of 24 operational satellites. These satellites orbit the Earth in six different orbital planes, ensuring global coverage and the availability of multiple satellites for accurate positioning at any given time.

Question 4

What is the minimum number of Global Positioning System (GPS) satellites that are observable by a user anywhere on earth?

Accepted Answer

5.

Answer

While a minimum of four GPS satellites are required for a three-dimensional position fix, the GPS constellation is designed to ensure that a minimum of five satellites are observable by a user anywhere on Earth at any given time. This redundancy provides improved accuracy and allows for Receiver Autonomous Integrity Monitoring (RAIM), which requires at least five satellites (or four with a barometric altimeter input).

Question 5

How many Global Positioning System (GPS) satellites are required to yield a three dimensional position (latitude, longitude, and altitude) and time solution?

Accepted Answer

4.

Answer

To yield a three-dimensional position (latitude, longitude, and altitude) and a precise time solution, a Global Positioning System (GPS) receiver requires signals from a minimum of four satellites. Each satellite provides ranging data, and with four such measurements, the receiver can accurately calculate its unknown position in three dimensions and synchronize its internal clock.

FAA Practice Test

FAA Practice Test

FAA Electronic Navigation Exam 2