FAA Electronic Navigation Exam 1 — Questions and Answers

Question 1: (Refer to Figure 20.) What is your approximate position on low altitude airway Victor 1, southwest of Norfolk (area 1), if the VOR receiver indicates you are on the 340° radial of Elizabeth City VOR (area 3)?

15 nautical miles from Norfolk VORTAC.
18 nautical miles from Norfolk VORTAC. (Correct answer)
23 nautical miles from Norfolk VORTAC.

Correct answer: 18 nautical miles from Norfolk VORTAC.

To find your position, locate Elizabeth City VOR (area 3) on Figure 20. Draw a line extending from the VOR along its 340° radial (which is 340° magnetic from the VOR). Next, locate low altitude airway Victor 1 (the blue line) southwest of Norfolk (area 1). The point where the 340° radial intersects Victor 1 is your approximate position. Using the nautical mile scale on the chart, measure the distance from this intersection point to the Norfolk VORTAC (area 1), which will be approximately 18 nautical miles.

Question 2: (Refer to Figure 20, area 3; and Figure 28.) The VOR is tuned to Elizabeth City VOR, and the aircraft is positioned over Shawboro. Which VOR indication is correct?

2.
8.
9. (Correct answer)

Correct answer: 9.

First, locate Elizabeth City VOR (area 3) and the town of Shawboro on Figure 20. Draw a line from the VOR to Shawboro. This line represents the aircraft's position relative to the VOR. By aligning this line with the VOR rose, you can determine that Shawboro lies approximately on the 255° radial from the Elizabeth City VOR. Since the aircraft is positioned *over* Shawboro, it is *from* the VOR. Therefore, the correct VOR indication (Figure 28) would show the OBS set to 255°, a centered CDI, and a FROM flag, which corresponds to illustration 9.

Question 3: (Refer to Figure 21.) What course should be selected on the omnibearing selector (OBS) to make a direct flight from Mercer County Regional Airport (area 3) to the Minot VORTAC (area 1) with a TO indication?

A. 359°. (Correct answer)
C. 001°.

Correct answer: A. 359°.

To determine the course for a direct flight from Mercer County Regional Airport (area 3) to Minot VORTAC (area 1) with a TO indication, draw a straight line between the two points on Figure 21. Measure the magnetic bearing of this line from Mercer County to Minot. Using a protractor or by visually estimating against the VOR rose, the course from Mercer County to Minot is approximately 359°. For a 'TO' indication, the OBS should be set to the magnetic course *to* the station.

Question 4: (Refer to Figure 23.) What is the approximate position of the aircraft if the VOR receivers indicate the 320° radial of Savannah VORTAC (area 3) and the 191° radial of Allendale VOR (area 1)?

Briggs private airfield. (Correct answer)
Town of Guyton.
3 miles east of Blirchton.

Correct answer: Briggs private airfield.

To determine the aircraft's position, plot the two VOR radials on Figure 23. From Savannah VORTAC (area 3), draw a line along the 320° radial (northwest). From Allendale VOR (area 1), draw a line along the 191° radial (south-southwest). The intersection point of these two radials indicates the aircraft's approximate position. This intersection falls directly over Briggs private airfield, making it the correct answer.

Question 5: (Refer to Figure 23.) On what course should the VOR receiver (OBS) be set to navigate direct from Hampton Varnville Airport (area 1) to Savannah VORTAC (area 3)?

016°.
196°. (Correct answer)
200°.

Correct answer: 196°.

To navigate direct from Hampton Varnville Airport (area 1) to Savannah VORTAC (area 3), draw a straight line between these two points on Figure 23. Then, measure the magnetic course of this line from Hampton Varnville to Savannah. By aligning a protractor or visually estimating with the VOR rose, the magnetic course is approximately 196°. This is the course that should be set on the VOR receiver's OBS for a direct flight with a TO indication.

Question 6: (Refer to Figure 24.) What is the approximate position of the aircraft if the VOR receivers indicate the 245° radial of Sulphur Springs VOR-DME (area 5) and the 145° radial of Bonham VORTAC (area 3)?

Meadowview Airport.
Glenmar Airport. (Correct answer)
Majors Airport.

Correct answer: Glenmar Airport.

First, locate Bonham VORTAC (area 3) and the town of Sulphur Springs (area 5) on Figure 24. Draw a line from the Bonham VORTAC to Sulphur Springs. This line represents the aircraft's position relative to the VORTAC. By aligning this line with the VORTAC rose, you can determine that Sulphur Springs lies approximately on the 155° radial from the Bonham VORTAC. Since the aircraft is positioned *over* Sulphur Springs, it is *from* the VORTAC. Therefore, the correct VOR indication (Figure 28) would show the OBS set to 155°, a centered CDI, and a FROM flag, which corresponds to illustration 7.

Question 7: (Refer to Figure 24.) On what course should the VOR receiver (OBS) be set in order to navigate direct from Majors Airport (area 1) to Quitman VORTAC (area 2)?

100°. (Correct answer)
108°.
280°.

Correct answer: 100°.

To navigate direct from Majors Airport (area 1) to Quitman VORTAC (area 2), draw a straight line between these two points on Figure 24. Then, measure the magnetic course of this line from Majors Airport to Quitman. By aligning a protractor or visually estimating with the VORTAC rose, the magnetic course is approximately 100°. This is the course that should be set on the VOR receiver's OBS for a direct flight with a TO indication.

Question 8: (Refer to Figures 24 and 28.) The VOR is tuned to Bonham VORTAC (area 3), and the aircraft is positioned over the town of Sulphur Springs (area 5). Which VOR indication is correct?

1.
7. (Correct answer)
8.

Correct answer: 7.

Question 9: (Refer to Figure 25, area 5.) The VOR is tuned to the Maverick VOR/DME. The omnibearing selector (OBS) is set on 253°, with a TO indication, and a right course deviation indicator (CDI) deflection. What is the aircraft's position from the VORTAC?

East-northeast. (Correct answer)
North-northeast.
West-southwest.

Correct answer: East-northeast.

With the OBS set to 253° and a TO indication, the desired inbound course to the Maverick VOR/DME (area 5) is 253°. This means the aircraft is currently on the 073° radial (253° - 180°). A right course deviation indicator (CDI) deflection means the aircraft is to the left of the desired course. Therefore, the aircraft is on a radial slightly greater than 073°, which places it in the East-northeast sector relative to the VORTAC.

Question 10: (Refer to Figure 26, areas 4 and 2; and Figure 28.) The VOR is tuned to Jamestown VOR, and the aircraft is positioned over the town of Cooperstown. Which VOR indication is correct?

5.
1.
4. (Correct answer)

Correct answer: 4.

First, locate Jamestown VOR (area 4) and the town of Cooperstown (area 2) on Figure 26. Draw a line from the Jamestown VOR to Cooperstown. This line represents the aircraft's position relative to the VOR. By aligning this line with the VOR rose, you can determine that Cooperstown lies approximately on the 095° radial from the Jamestown VOR. Since the aircraft is positioned *over* Cooperstown, it is *from* the VOR. Therefore, the correct VOR indication (Figure 28) would show the OBS set to 095°, a centered CDI, and a FROM flag, which corresponds to illustration 4.

Question 11: (Refer to Figure 28, illustration 4.) The VOR receiver has the indications shown. What is the aircraft's position relative to the station?

North. (Correct answer)
East.
South.

Correct answer: North.

Figure 28, illustration 4 shows the OBS set to 095°, a centered CDI, and a FROM flag. This combination indicates that the aircraft is currently on the 095° radial from the VOR station. The 095° radial extends from the VOR in an East-Southeast direction. (Note: There is a known discrepancy with this FAA question; if the intended answer is 'North', it would correspond to illustration 3, which shows OBS 180° TO, centered CDI, meaning the aircraft is on the 000° radial and flying TO the station, hence North of the station. However, strictly interpreting illustration 4, the aircraft is East-Southeast of the station.)

Question 12: (Refer to Figure 28, illustration 7.) The VOR receiver has the indications shown. What is the aircraft's position relative to the station?

East.
Southeast. (Correct answer)
West.

Correct answer: Southeast.

Figure 28, illustration 7 shows the OBS set to 155°, a centered CDI, and a FROM flag. When the CDI is centered and the FROM flag is displayed, it means the aircraft is currently on the radial indicated by the OBS. Therefore, the aircraft is on the 155° radial from the station. A 155° radial is located in the Southeast sector relative to the VOR station.

Question 13: (Refer to Figure 28, illustration 5.) The VOR receiver has the indications shown. What radial is the aircraft crossing?

030°. (Correct answer)
210°.
300°.

Correct answer: 030°.

Figure 28, illustration 5 shows the OBS set to 030°, a centered CDI, and a FROM flag. When the CDI is centered and the FROM flag is displayed, it means the aircraft is currently on the radial indicated by the OBS. Therefore, the aircraft is crossing, or is currently on, the 030° radial from the VOR station.

Question 14: In the event that the aircraft has a vacuum system for other gyroscopic instruments, what benefit does an electric turn coordinator offer?

In comparison to vacuum-driven indications, it is more trustworthy.
If the vacuum system fails, it serves as a backup. (Correct answer)
Unlike vacuum-driven turn indicators, it won't tumble.

Correct answer: If the vacuum system fails, it serves as a backup.

In aircraft equipped with a vacuum system for primary gyroscopic instruments like the attitude and heading indicators, an electric turn coordinator provides a critical safety benefit. If the vacuum system fails, all vacuum-driven instruments become inoperative. An electrically powered turn coordinator continues to function, offering a reliable backup for bank and turn rate information, which is essential for maintaining aircraft control, especially in instrument meteorological conditions (IMC).

Question 15: When using a ground test signal approved by the FAA, what is the maximum bearing error (+ or -) permitted for an operational VOR equipment check?

6°.
8°.
4°. (Correct answer)

Correct answer: 4°.

According to FAA regulations (14 CFR Part 91.171), when performing a VOR operational check using an FAA-approved ground test signal, the maximum permissible bearing error is plus or minus 4°. This standard ensures that the VOR receiver is providing sufficiently accurate navigation information for safe flight operations.

Question 16: How accurate does the altimeter need to be when checked before takeoff?

Within +/- 50 feet of the known field elevation.
Within +/- 75 feet of the known field elevation. (Correct answer)
Within +75/-50 feet of the known field elevation.

Correct answer: Within +/- 75 feet of the known field elevation.

Before takeoff, pilots must perform an altimeter check to ensure its accuracy. After setting the altimeter to the current reported altimeter setting, the indicated altitude should be within plus or minus 75 feet of the known field elevation. This check confirms the altimeter is functioning correctly and providing reliable altitude information for the flight.

Question 17: When the aircraft is at the appropriate checkpoint on the airport's surface, how should the pilot do a VOR receiver check?

OBS should be placed on the specified radial. With a FROM indication, the CDI must center within plus or minus 4° of that radial. (Correct answer)
The CDI should be centered with a FROM indication, and the OBS should be set to 180° plus or minus 4°.
The CDI should center with a TO indication within plus or minus 4° of the VOR radial when the OBS is set to 000° and the aircraft is traveling straight toward the VOR.

Correct answer: OBS should be placed on the specified radial. With a FROM indication, the CDI must center within plus or minus 4° of that radial.

When performing a VOR receiver check at an airport's designated ground checkpoint, the pilot tunes the VOR and sets the OBS to the specific radial published for that checkpoint. With a FROM indication, the Course Deviation Indicator (CDI) must center within plus or minus 4° of that specified radial. This procedure verifies the accuracy of the VOR receiver system while the aircraft is stationary on the ground.

Question 18: Please see Figure 17. Which statement is true regarding illustration 2, if the present heading is maintained? The airplane will

intercept the 225 radial at a 45° angle.
intercept the 360 radial at a 45° angle inbound.
cross the 180 radial at a 45° angle outbound. (Correct answer)

Correct answer: cross the 180 radial at a 45° angle outbound.

In Figure 17, illustration 2, the aircraft is heading 225° with the OBS set to 225° TO and the CDI centered. This means the aircraft is flying directly towards the VOR on the 225° inbound course (which corresponds to being on the 045° radial from the VOR). If the present heading of 225° is maintained, the aircraft will pass over the VOR and then continue flying outbound on the 225° radial. As it flies outbound, it will cross the 180° radial at an angle of 45° (225° - 180° = 45°).

FAA Electronic Navigation Exam 1

(Refer to Figure 20.) What is your approximate position on low altitude airway Victor 1, southwest of Norfolk (area 1), if the VOR receiver indicates you are on the 340° radial of Elizabeth City VOR (area 3)?