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Question 1

Primary Radar operates on the principle of

Answer 1

Pulse Technique

Question 2

The advantage of the use of slotted antennas in modern radar technology is to:

Answer 2

Virtually eliminate sidelobes, and concentrate more energy in the main beam.

Question 3

Which of the following lists information required to input a waypoint or ‘Phantom Station’ into a basic VOR/DME-based Area Navigation System?

Answer 3

Radial and distance from a VOR/DME to the waypoint or ‘Phantom Station

Question 4

Define Modulation

Answer 4

The addition of information onto a radio wave during transmission.

Question 5

Types of SBAS

Answer 5

EGNOS, GAGAN, MSAS, WAAS

Wide area navigation aids.

Question 6

Advantage of the GLS over the ILS

Answer 6

More accurate in the vicinity of the airport

Question 7

RNP vs RNAV

Answer 7

RNP requires on board performance monitoring & alerting, RNAV does not.

Question 8

What aerials are used in a primary radar system?

Answer 8

One directional antenna both for transmitting and for receiving.

Question 9

Skip Distance

Answer 9

Range from the transmitter to the first sky wave.

Question 10

Fading Phenomenon

Answer 10

Occurs at night due to the combination of the sky and ground waves.

Question 11

The operating principle of a DME is the measurement of the:

Answer 11

Time between the transmission and reception of radio pulses

Question 12

The maximum range of primary radar depends on:

Answer 12

PRF.

• Remember Runamb

Question 13

How does primary radar distinguish targets in an azmimuth

Answer 13

Beam width

Question 14

Frequency of Airborne Wx Radar

Answer 14

9375 MHz - 9.3 GHz

Question 15

In order to ascertain whether a cloud return on an Aircraft Weather Radar (AWR) is at or above the height of the aircraft, the tilt control should be set to:

Answer 15

2.5 degrees UP.

Question 16

The code transmitted by a SSR transponder consists of:

Answer 16

Pulses

Question 17

Phantom Station Errors

Answer 17

When operating at low altitudes close to the limit of reception range from the REFERENCE station

Question 18

On what data is a VOR/DME Area Navigation system operating in the dead reckoning mode?

Answer 18

TAS from the Air Data Computer; heading from the aircraft compass; the last computed W/V.

Question 19

Kalman Filtering

Answer 19

Used in the FMC

Compiles together multiple data sources, of different types, to return an estimate better than any one source.

Question 20

How can receiver clock error be corrected?

Answer 20

Using correction from the clocks of 4 satellites.

Question 21

Shadowing

Answer 21

May prevent the reception of signals

Question 22

NAVSTAR/GPS orbital planes

Answer 22

6 orbital planes, 4 satellites in each.

Question 23

RAIM

Answer 23

It is a technique by which a receiver checks the RELIABILITY of the signals it is receiving and can detect if one of the signals is incorrect.

Question 24

The maximum range of a pulse radar is affected by:

Answer 24

Pulse width, transmission frequency, PRP

[ALL OF THESE]

Question 25

Range of GBAS

Answer 25

30kms

Question 26

Antenna Definition

Answer 26

A wave type transducer for the process of converting a line AC into a free electromagnetic wave.

Question 27

What happens to frequency and amplitude when A1A modulation is “keyed”?

Answer 27

Both remain the same.

Question 28

For an ATS surveillance service to be provided, what is the minimum amout of information that the controller should see on the display in front of him/her?

Answer 28

A suitable map overlay (when available), aircraft identification, flight level

Question 29

Which holding procedures are permitted

Answer 29

Sectors 1 & 3

Question 30

When will a failure flag appear on the ILS?

Answer 30

When the percentage modulation of the 90Hz or 150Hz is zero

When no 90Hz or 150Hz signal is detected

Question 31

Conventional VOR

Answer 31

The variable signal antenna rotates at 30 times per second whilst the reference signal is produced from a fixed antenna.

Question 32

An aircraft is within range, and has tuned in to Pamplona VOR.

Answer 32

Slant range will be provided because tuning the VHF frequency automatically includes the UHF frequency that the DME operates on.

Question 33

PBN, unlike its counterparts is

Answer 33

Not sensor specific

Question 34

Components of a PBN System

Answer 34

Navigation infrastructure, navigation application, navigation specification

Question 35

During the approach phase, PBN accomodates

Answer 35

Linear and angular laterally-guided approaches

Question 36

Standards for coding SIDs/STARs

Answer 36

AIRINC424

Question 37

Requirements of RNAV 10

Answer 37

2 independent and serviceable long range nagiation trasmitters INS/IRS, FMS or GNSS

Question 38

RNP Approach LNAV Minima

Answer 38

2 dimensional non-precision approach.