VOR

Question 1

Pictured are several aircraft all with their OBS set to 360°. Which aircaft (A,B,C,D,E,F,G,H) would show the FROM flag on the instrument?

Select all aircraft that would show the FROM flag

Answer 1

A, B, C, D

Question 2

List at least two indications that could be used to indicate you are passing overhead a VOR station

Answer 2

**CDI needle becomes increasingly sensitive as you approach

Flicker of the TO/FROM flag and a change from the TO flag to the FROM flag (and vice versa)

OFF flag briefly shown as passing directly overhead the ‘cone of silence/confusion’ of the VOR**

Question 3

Each dot on the CDI instrument indicates ____° deviation

Answer 3

2°

Question 4

The radial that the aircraft is on is always indicated by the (tail, head) of the needle when shown on the RMI

What is the correct answer?

Answer 4

tail

Question 5

OBS stands for ____ ____ ____

Answer 5

Omni Bearing Selector

Question 6

The OBS is set to 120° and the TO flag is shown, but you soon find yourself off course by 65° and tracking 185°. You would expect the TO/FROM flag to now show (TO, FROM, OFF)

What is the correct answer?

Answer 6

TO

Question 7

The VOR operates in the ____ band

Answer 7

VHF

Question 8

The VOR Variable Phase Signal is (directional, omni-directional)

Answer 8

directional

Question 9

The CDI needle is deflected left from centre, this means the selected radial is to your (left, right) and you need to turn (left, right) to regain track

What is the correct answer?

Answer 9

The CDI needle is deflected left from centre, this means the selected radial is to your left and you need to turn left to regain track

Question 10

Max range of VOR is deemed ____ of ____

Answer 10

line of sight

Question 11

The TO/FROM Flag (does, does not) change with aircraft heading

Answer 11

does not

Question 12

The TO/FROM Flag (does, does not) indicate if the aircraft is flying to or from the VOR station

What is the correct answer?

Answer 12

**does not

(as it ignores aircraft heading)**

Question 13

The CDI devaition scale indicates a maximum (full dot deflection) of ____° either side of the selected radial

Answer 13

10°

Question 14

The main factor effecting VOR range is…

Answer 14

Mountainous terrian

Question 15

You are tracking inbound on the VOR 030° radial. What OBS setting should you set to provide command indications, and what would be the correct TO/FROM indication?

Answer 15

210° set on the OBS, TO flag showing

Question 16

Which of the following should be considered as station passage when using VOR?

Answer 16

The first complete reversal of the TO FROM indicator

Question 17

the maximum permissible bearing error for an airborne checkpoint is plus or minus _____ degrees.

Answer 17

6

Question 18

The VOR check must be entered into:

Answer 18

The aircraft log or other record.

Question 19

How to check the VOR sensitvity?

Answer 19

1) noting the number of degrees of change as you rotate the OBS to move the CDI from center to the last dot on either side. The selected course should not exceed 10° or 12° either side.

Question 20

A particular VOR station is undergoing routine maintenance. This is evidenced by

Answer 20

removal of the identification feature.

Question 21

) A VOR receiver with normal five-dot course sensitivity shows a three-dot deflection at 30 NM from the station. The aircraft would be displaced approximately how far from the course centerline?

Answer 21

Each dot represents about 200’ per mile. 30 x 200 = 6,000’ or about one mile. A 3 dot deflection of the CDI indicates the aircraft is off course about 3 miles.

Question 22

For operations off established airways at 17,000 feet MSL in the contiguous U.S., (H) Class VORTAC facilities used to define a direct route of flight should be no farther apart than

Answer 22

The standard high altitude service volume between 14,500’ and 18,000’ is 100 NM. Therefore, between two “H” VORTACs the useful range is 200 NM.

Question 23

What angular deviation from a VOR course centerline is represented by a 1/2 scale deflection of the CDI?

Answer 23

Full needle deflection of the CDI from the center position to either side of the dial indicates the aircraft is 10° or more off course. A 1/2 scale deflection of the CDI represents 5°.

Question 24

Full scale deflection of a CDI occurs when the course deviation bar or needle

Answer 24

deflects from the center of the scale to either far side of the scale.

Question 25

What is the lateral displacement of the aircraft in NM from the radial selected on the No. 1 NAV? 2.5 dots

Answer 25

2.5 X 200 = 500’

500’X 60=30000

30000= 5miles (1NM is 6000’)

Question 26

An aircraft which is located 30 miles from a VOR station and shows a 1/2 scale deflection on the CDI would be how far from the selected course centerline?

Answer 26

There are 5 dots on either side of the center of the CDI. Each dot represents about 200’ per mile. 30 x 200 = 6,000’ or about one mile. A 2.5 dot deflection of the CDI indicates the aircraft is off course about 2.5 miles.