2A553A 2011 VOL 4

1. (601) What is the purpose of the very-high frequency omnirange system?

Determine up/down guidance

Determine left/right guidance

Determine bearing to a station

Indicate distances along the approach

2. (601) The basic operating principle of very-high frequency omnirange is phase comparing the

30-Hz reference and 9,960-Hz frequency-modulated (FM) signals

30-Hertz (Hz) reference and 30-Hz variable signals

30-Hz variable and 9,960-Hz FM signals

90- and 150-Hz modulated signals

3. (602) The instrument landing system marker beacon carrier frequency is

68.1 kilohertz (kHz)

68.1 megahertz (MHz)

75 kHz

75 MHz

4. (605) To get a FROM flag in view on the horizontal situation indicator when the magnetic bearing to the very-high frequency omnirange station is 75°, the selected course should be manually set to

75°

150°

210°

360°

5. (602) What frequency band is used to transmit instrument landing system glide slope information?

Low frequency

High frequency

Ultra-high frequency

Very-high frequency

6. (603) On how many channels are the microwave landing system receivers capable of operating?

200

500

559

669

7. (603) What microwave landing system outputs are provided to the pilot's and copilot's horizontal situation and attitude director indicators for approach and takeoff?

Azimuth signals

Elevation signals

Steering indications

Ground station indications

8. (603) Which microwave landing system component allows for selection of system status?

Data bus coupler

Receiver power on relay

Flight director mode selector

Integrated display computer unit

9. (607) If the very-high frequency omnirange station signal is lost or the receiver malfunctions, the ARN–147 system parks the bearing pointer at the

3 o’clock position

6 o’clock position

9 o’clock position

12 o’clock position

10. (601) If the magnetic bearing to a very-high frequency omnirange station is 225°, the phase difference between the 30-Hertz (Hz) reference and 30-Hz variable signals is

15°

45°

135°

225°

11. (603) Which antennas are shared by microwave landing system numbers 1 and 2?

1 and 2

1 and 3

3 and 2

3 and 4

12. (607) The total number of very-high frequency omnirange/instrument landing system (VOR/ILS) channels that can be selected by the AN/ARN–147 VOR/ILS control box is

40

160

200

540

13. (606) When the instrument landing system marker beacon amber (orange) lamp illuminates, the pilot hears a

400-Hertz (Hz) tone

3,000-Hz tone

1,000-Hz tone

1,300-Hz tone

14. (608) The main reference burst is transmitted when the main lobe of the tactical air navigation surface beacon radiation pattern is due

North

South

East

West

15. (608) A tactical air navigation surface beacon provides a station identification code (beacon identity tone) every

7.5 seconds

20 seconds

30 seconds

40 seconds

16. (602) The instrument landing system localizer course width at a distance of 10 miles from the transmitter is normally

5°

2.5°

0.7°

0.5°

17. (601) Very-high frequency omnirange aural (station identification) signals are transmitted

Continuously

At 20-second intervals

At 30-second intervals

At specified time intervals

18. (605) Which radial will the aircraft be positioned on if the aircraft is located north of the veryhigh frequency omnirange station?

270°

180°

090°

000°

19. (607) What glide slope information is provided to the attitude director indicator when the AN/ARN–127 is operating in the instrument landing system mode?

Audio signals

Navigation signals

Up/down deviations

Left/right deviations

20. (603) What is the frequency range of the microwave landing system receivers?

200 – 500 megahertz (MHz)

500 – 669 MHz

669 – 5031 MHz

5031 – 5091 MHz

21. (606) In instrument landing system operation, a deflection of two dots on the attitude director indicator glide slope deviation scale indicates the aircraft is

0.25° off glide path

2.5° off glide path

0.6° off glide path

6.0° off glide path

22. (603) What is not a microwave landing system output?

Azimuth deviation

Glide slope deviation

Azimuth warning flag

Glide slope correction flag

23. (607) In very-high frequency omnirange (VOR) mode, what information is sent to the horizontal situation indicator by the ARN–147 VOR/localizer receiver?

TO/FROM, heading, and relative bearing

Relative bearing, flag alarm, and heading

Flag alarm, distance, and left/right deviation

Left/right deviation, flag alarm, and TO/FROM

24. 604) When an instrument landing system frequency is selected, the ARN–127 very-high frequency omnirange receiver parks the horizontal situation indicator bearing pointer at the

3 o’clock position

4 o’clock position

6 o’clock position

10 o’clock position

25. (606) During instrument landing system operation, a full-scale deflection of the horizontal situation indicator vertical needle indicates the aircraft is off course from the runway centerline by

200 feet

400 feet

0.6°

2.5°

2a553a 2011 Vol 4