VOR

Question 1

If the reference and variable signals are in-phase the associated VOR radial would be (360°, 90° , 180° , 270° , 300°)

What is the correct answer?

Answer 1

360° (or 000°)

Question 1

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

Answer 1

does not

Question 1

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

Answer 1

**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 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 3

The principle of operation of the VOR is based on the measurement of…

Answer 3

phase difference between reference and variable phase signals

Question 4

Each dot on the CDI instrument indicates ____° deviation

Answer 4

2°

Question 5

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 5

tail

Question 6

OBS stands for ____ ____ ____

Answer 6

Omni Bearing Selector

Question 7

The basic principle of the VOR Receiver is that it measures…

Answer 7

the difference in phase signal

Question 7

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 7

TO

Question 8

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

Answer 8

directional

Question 8

The VOR operates in the ____ band

Answer 8

VHF

Question 9

When the OBS selector is turned it shifts the phase of the ____ signal internally

What signal is shifted internally by the aircarft receiver?

Answer 9

reference signal

Question 10

With regard to terrian effect, rapid needle oscillations are called ____ while slow oscillations are called ____ _____

Answer 10

With regard to terrian effect, rapid needle oscillations are called **scalloping **while slow oscillations are called radial bending

Question 12

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 12

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 14

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

What is the correct answer?

Answer 14

omni-directional

Question 15

Ignoring any OBS value, when on the VOR 180° Radial the reference and variable phase signals received will be (in-phase, out-of-phase)

What is the correct answer?

Answer 15

out-of-phase

Question 16

When drift is correctly compensated for the drift angle can be seen by comparing aircraft heading and the ____ value when the CDI is centred

Answer 16

comparing aircraft heading and the OBS value when the CDI is centred

Question 17

Max range of VOR is deemed ____ of ____

Answer 17

line of sight

Question 19

If you turn the OBS from 360°/000° to 280° the reference signal is shifted ____° and the signals will be (in-phase, out-of-phase) when on the 280° radial FROM the VOR

What combination gives the correct answer?

Answer 19

If you turn the OBS from 360°/000° to 280° the reference signal is shifted 280° and the signals will be in-phase when on the 280° radial FROM the VOR

Question 20

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 20

**does not

(as it ignores aircraft heading)**

Question 21

Pictured is two different VOR stations tuned on an RMI. Needle 1 (skinny) is tuned to VOR A and shows the aircraft is on the ____° radial while Needle 2 (fat) is tuned to VOR B and shows the aircraft is on the stations _____° radial

Answer 21

Pictured is two different VOR stations tuned on an RMI. Needle 1 (skinny) is tuned to VOR A and shows the aircraft is on the 240° radial while Needle 2 (fat) is tuned to VOR B and shows the aircraft is on the stations 120° radial

Question 22

You are tracking outbound on the VOR 144° radial. What OBS setting should you set to provide command indications, and what would be the correct TO/FROM indication?

Answer 22

144° set on the OBS, FROM flag showing

Question 23

Which pictured instrument represents a signal that is 180° out-of-phase?

Answer 23

Instrument 2

Question 25

Under what conditions will the CDI needle be straight and centred on the instrument face showing no deviation?

Answer 25

When tracking correctly on the selected radial or its recipicol. i.e. When the signal is in-phase or 180° out-of-phase

Question 26

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

Answer 26

10°

Question 27

The pictured instrument shows deviation of ____° and the aircraft is to the (left, right) of the radial

Answer 27

10° and the aircraft is to the right of the radial (needs to turn left to regain track)

(remember the outer circumfrance of the middle centre circle (dount) is the first 2° of deviation)

Question 28

The main factor effecting VOR range is…

Answer 28

Mountainous terrian

Question 29

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 29

210° set on the OBS, TO flag showing

Question 30

Route Operating Limitations (ROL’s) give what en-route information?

Answer 30

Minumum reception altitude for some routes and other routes a change over point is shown where beyond reception is deemed not entirely reliable.