Vayudoot Aviation

1.
Under JAR-25 colour code rules for Electronic Flight Instrument Systems (EFIS), increasing intensity of precipititation are coloured in the order

green, amber/yellow, red, magenta

black, amber/yellow, magenta, red

green, red, magenta, black

amber/yellow, magenta, black

2.
An aircraft at 6400 FT will be able to receive a VOR groundstation at 100 FT above MSL at an approximate maximum range of

90 NM

100 NM

110 NM

120 NM

3.
A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to

50 feet above ILS reference point

200 feet above the runway threshold

200 feet above the inner marker

runway surface

4.
In Airborne Weather Radar (AWR), the main factors which determine whether a cloud will be detected are

size of the water drops,wavelength/frequency used

size of the water drops,diameter of radar scanner

range from cloud,wavelength/frequency used

rotational speed of radar scanner,range from cloud

5.
'Night Effect' which causes loss of signal and fading, resulting in bearing errors from NDB transmissions, is due to

static activity increasing at night particularly in the lower frequency band

skywave distortion of the null position and is maximum at dawn and dusk

the effect of the Aurora Borealis

interference from other transmissions and is maximum at dusk when east of the NDB

6.
Which one of the following inputs to an Area Navigation System (R-NAV) comes from an external, not on-board, system?

Magnetic heading

Pressure altitude

Inertial Navigation System (INS) position

VOR/DME radial/distance

7.
The Doppler Navigation System is based on

phase comparison from ground station transmissions

radar principles using frequency shift

radio waves refraction in the ionosphere

doppler VOR (DVOR) Navigation System

8.
Which of the following frequency-bands is used by the Loran C navigation system?

90 - 110 kHz

10.2 - 13.6 kHz

1750 - 1950 kHz

978 - 1213 MHz

9.
What approximate rate of descent is required in order to maintain a 3° glidepath at a groundspeed of 90 kt?

450 FT/MIN

600 FT/MIN

400 FT/MIN

700 FT/MIN

10.
Radar returns, on a B737-400, can be displayed on all Electronic Horizontal Situation Indicator (EHSI) screen modes of an Electronic Flight Instrument System (EFIS) WITH THE EXCEPTION OF

FULL NAV, FULL VOR/ILS and PLAN

EXP VOR/ ILS, PLAN and MAP

FULL NAV, PLAN and MAP

FULL VOR/ILS, EXP VOR/ILS and PLAN

11.
For any given circumstances, in order to double the effective range of a primary radar the power output must be increased by a factor of

3

16

2

8

12.
A radio beacon has an operational range of 10 NM. By what factor should the transmitter power be increased in order to achieve an operational range of 20 NM?

Two

Six

Four

Eight

13.
Which of the following statements concerning LORAN-C is correct?

It is a hyperbolic navigation system that works on the principle of range measurement by phase comparison

It is a navigation system based on secondary radar principles, position lines are obtained in sequence from up to eight ground stations

It is a navigation system based on simultaneous ranges being received from a minimum of four ground stations

It is a hyperbolic navigation system that works on the principle of differential range by pulse technique

14.
In order to plot a bearing from a VOR station, a pilot needs to know the magnetic variation

at both the VOR and aircraft

at the VOR

at the aircraft location

at the half-way point between the aircraft and the station

15.
In which navigation system does the master station transmit a continuous string of pulses on a frequency close to 100 kHz?

Decca

Doppler

GPS

Loran C

16.
The geometric shape of the reference system for the satellite navigation system NAVSTAR/GPS, defined as WGS 84, is

a mathematical model that describes the exact shape of the earth

a sphere

an ellipsoid

a geoid

17.
Which component of the B737-400 Electronic Flight Instrument System generates the visual displays on the EADI and EHSI?

Symbol Generator

Flight Management Computer

Navigation database

Flight Control Computer

18.
Signal reception is required from a minimum number of satellites that have adequate elevation and suitable geometry in order for a Satellite-Assisted Navigation System (GPS) to carry out independent three dimensional operation without the Receiver Autonomous Integrity Monitoring (RAIM) function. The number of satellites is

5

3

6

4

19.
What is the maximum number of usable Secondary Surveillance Radar (SSR) transponder codes?

3600

760

4096

1000

20.
A typical frequency employed in Distance Measuring Equipment (DME) is

100 MHz

10 MHz

100 GHz

1000 MHz

21.
The principle of operation of an ILS localiser transmitter is based on two overlapping lobes that are transmitted on (i).......... frequencies and carry different (ii)..........

(i) different (ii) modulation frequencies

(i) different (ii) phases

(i) the same (ii) phases

(i) the same (ii) modulation frequencies

22.
The minimum range of a primary radar, using the pulse technique, is determined by the (i)........ , the maximum unambiguous range by the (ii).........

(i) transmission frequency (ii) transmitter power output

(i) pulse length (ii) length of the timebase

(i) transmission frequency (ii) pulse recurrence frequency

(i) pulse length (ii) pulse recurrence frequency

23.
In which frequency band do most airborne weather, and ground based ATC, radar systems operate?

VHF

SHF

UHF

EHF

24.
The two main design functions of Secondary Surveillance Radar (SSR) Mode S are

continuous automatic position reporting using Global Positioning System (GPS) satellites and collision avoidance using TCAS II

air to ground and ground to air data link communications and improved ATC aircraft surveillance capability

the elimination of ground to air communications and the introduction of automatic separation between aircraft using TCAS II

collision avoidance using TCAS II and improved long range (HF) communication capability.

25.
What is the deviation per dot on the HSI when using a 2-dot basic RNAV system in the en-route mode?

1 NM

10 NM

2 NM

5 NM

26.
Which one of the following statements is correct concerning the use in primary radar of continuous wave transmissions as compared with pulse transmissions?

It eliminates the minimum target reception range

It is less effective in short range radars but more effective in long range radars

It eliminates the minimum target reception range

The equipment required is more complex in continuous wave radar but this is offset by greater reliability and accuracy

27.
Transmissions from VOR facilities may be adversely affected by

night effect

quadrantal error

uneven propagation over irregular ground surfaces

static interference

28.
Which one of the following disturbances is most likely to cause the greatest inaccuracy in ADF bearings?

Local thunderstorm activity

Quadrantal error

Coastal effect

Precipitation interference

29.
In the NAVSTAR/GPS satellite navigation system, 'Selective Availability' (SA) gives the option to artificially degrade the accuracy by

shutting off selected satellites

offsetting satellite atomic clocks by a predetermined constant amount

dithering the satellite clock

using a less accurate atomic clock in a satellite for signal processing

30.
In relation to the satellite navigation system NAVSTAR/GPS, 'All in View' is a term used when a receiver

requires the signals of all visible satellites for navigation purposes

is receiving and tracking the signals of all 24 operational satellites simultaneously

is receiving the signals of all visible satellites but tracking only those of the 4 with the best geometric coverage

is tracking more than the required 4 satellites and can instantly replace any lost signal with another already being monitored

31.
In a primary radar using pulse technique, pulse recurrence frequency (PRF)/pulse recurrence rate (PRR) determines

target discrimination

beam width

minimum range

maximum theoretical range

32.
In an Airborne Weather Radar that has a colour cathode ray tube (CRT) increasing severity of rain and turbulence is generally shown by a change of colour from

yellow to amber to blue

yellow to orange to red

green to yellow to red

green to red to black

33.
MLS installations notified for operation, unless otherwise stated, provide azimuth coverage of

+ or - 20° about the nominal courseline out to a range of 10 NM

+ or - 40° about the nominal courseline out to a range of 20 NM

+ or - 20° about the nominal courseline out to a range of 20 NM

+ or - 40° about the nominal courseline out to a range of 30 NM

34.
The influence of the ionosphere on the accuracy of the satellite navigation system NAVSTAR/GPS is

minimised by the receiver using a model of the atmosphere and comparing signals transmitted by the satellites

only significant if the satellites are located at a small elevation angle above the horizon

minimised by computing the average of all signals

negligible

35.
One of the tasks of the space segment of the satellite navigation system NAVSTAR/ GPS is to

compute the user position from the received user messages and to transmit the computed position back to the user segment

transmit signals which can be used, by suitable receivers, to determine time, position and velocity

monitor the satellites' orbits and status

transmit signals to suitable receivers and to monitor the orbital planes autonomously

36.
An aircraft is flying on a heading of 270°(M). The VOR OBS is also set to 270° with the full left deflection and FROM flag displayed. In which sector is the aircraft from the VOR ground station?

SE

NW

SW

NE

37.
What is the minimum number of NAVSTAR/GPS satellites required to produce an accurate independent 3-D position fix?

5

24

4

3

38.
Which of the following lists are all errors that affect the accuracy and reliability of the Satellite-Assisted Navigation system (GNSS/GPS)?

Satellite to ground time lag, atmospheric propagation, satellite clock

Satellite mutual interference, frequency drift, satellite to ground time lag

Satellite mutual interference, satellite ephemeris, atmospheric propagation

Satellite clock, satellite ephemeris, atmospheric propagation

39.
On a DME, display counters rotating throughout their range indicates

the airborne equipment is conducting a frequency search

ground equipment failure

the airborne receiver is conducting a range search

airborne equipment failure

40.
The reason why the measured distance between a NAVSTAR/GPS satellite navigation system satellite and a receiver is called a 'Pseudo-Range' is because the

measured distance is based on the Pseudo Random Noise code

movement of satellite and receiver during the distance calculation is not taken into account

calculated range is based on an idealised Keplerian orbit

calculated range includes receiver clock error

41.
For a conventional DME facility 'Beacon Saturation' will occur whenever the number of simultaneous interrogations exceeds

100

60

200

80

42.
Loran C coverage is

confined to certain limited areas of the world

unrestricted between latitudes 70°N and 70°S

global

unrestricted over the oceans and adjacent coastlines but limited over the major continental land masses

43.
The maximum theoretical range at which an aircraft at FL80 can obtain bearings from a ground VDF facility sited 325 FT above MSL is

114 NM

134 NM

107 NM

158 NM

44.
If an aircraft flies along a VOR radial it will follow a

great circle track

constant magnetic track

line of constant bearing

rhumbline track

45.
The OUTER MARKER of an Instrument Landing System (ILS) facility transmits on a frequency of

300 MHz and is modulated by morse at two dashes per second

200 MHz and is modulated by alternate dot/dash in morse

75 MHz and is modulated by alternate dot/dash in morse

75 MHz and is modulated by morse at two dashes per second

46.
The maximum theoretical range at which an aircraft at FL210 may receive signals from a VOR facility sited 340 feet above mean sea level is approximately

204 NM

245 NM

183 NM

163 NM

47.
The maximum pulse repetition frequency (PRF) that can be used by a primary radar facility in order to detect targets unambiguously at a range of 50 NM is:(pps = pulses per second)

713 pps

1620 pps

3240 pps

610 pps

48.
What airborne equipment, if any, is required to be fitted in order that a VDF letdown may be flown?

VHF radio

VOR

none

VOR/DME

49.
Assuming sufficient transmission power, the maximum range of a ground radar with a pulse repetition frequency of 450 pulses per second is: (Given: velocity of light is 300 000 km/second)

1333 km

333 km

666 km

150 km

50.
The ATC transponder system,excluding Mode S, contains

four modes, each 1024 codes

four modes, each 4096 codes

two modes, each of 4096 codes

two modes, each 1024 codes

Question Bank

Questions for INDIGO RADIO NAVIGATION

Under JAR-25 colour code rules for Electronic Flight Instrument Systems (EFIS), increasing intensity of precipititation are coloured in the order

An aircraft at 6400 FT will be able to receive a VOR groundstation at 100 FT above MSL at an approximate maximum range of

A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to

In Airborne Weather Radar (AWR), the main factors which determine whether a cloud will be detected are

'Night Effect' which causes loss of signal and fading, resulting in bearing errors from NDB transmissions, is due to

Which one of the following inputs to an Area Navigation System (R-NAV) comes from an external, not on-board, system?

The Doppler Navigation System is based on

Which of the following frequency-bands is used by the Loran C navigation system?

What approximate rate of descent is required in order to maintain a 3° glidepath at a groundspeed of 90 kt?

Radar returns, on a B737-400, can be displayed on all Electronic Horizontal Situation Indicator (EHSI) screen modes of an Electronic Flight Instrument System (EFIS) WITH THE EXCEPTION OF

For any given circumstances, in order to double the effective range of a primary radar the power output must be increased by a factor of

A radio beacon has an operational range of 10 NM. By what factor should the transmitter power be increased in order to achieve an operational range of 20 NM?

Which of the following statements concerning LORAN-C is correct?

In order to plot a bearing from a VOR station, a pilot needs to know the magnetic variation

In which navigation system does the master station transmit a continuous string of pulses on a frequency close to 100 kHz?

The geometric shape of the reference system for the satellite navigation system NAVSTAR/GPS, defined as WGS 84, is

Which component of the B737-400 Electronic Flight Instrument System generates the visual displays on the EADI and EHSI?

What is the maximum number of usable Secondary Surveillance Radar (SSR) transponder codes?

A typical frequency employed in Distance Measuring Equipment (DME) is

The principle of operation of an ILS localiser transmitter is based on two overlapping lobes that are transmitted on (i).......... frequencies and carry different (ii)..........

The minimum range of a primary radar, using the pulse technique, is determined by the (i)........ , the maximum unambiguous range by the (ii).........

In which frequency band do most airborne weather, and ground based ATC, radar systems operate?

The two main design functions of Secondary Surveillance Radar (SSR) Mode S are

What is the deviation per dot on the HSI when using a 2-dot basic RNAV system in the en-route mode?

Which one of the following statements is correct concerning the use in primary radar of continuous wave transmissions as compared with pulse transmissions?

Transmissions from VOR facilities may be adversely affected by

Which one of the following disturbances is most likely to cause the greatest inaccuracy in ADF bearings?

In the NAVSTAR/GPS satellite navigation system, 'Selective Availability' (SA) gives the option to artificially degrade the accuracy by

In relation to the satellite navigation system NAVSTAR/GPS, 'All in View' is a term used when a receiver

In a primary radar using pulse technique, pulse recurrence frequency (PRF)/pulse recurrence rate (PRR) determines

In an Airborne Weather Radar that has a colour cathode ray tube (CRT) increasing severity of rain and turbulence is generally shown by a change of colour from

MLS installations notified for operation, unless otherwise stated, provide azimuth coverage of

The influence of the ionosphere on the accuracy of the satellite navigation system NAVSTAR/GPS is

One of the tasks of the space segment of the satellite navigation system NAVSTAR/ GPS is to

An aircraft is flying on a heading of 270°(M). The VOR OBS is also set to 270° with the full left deflection and FROM flag displayed. In which sector is the aircraft from the VOR ground station?

What is the minimum number of NAVSTAR/GPS satellites required to produce an accurate independent 3-D position fix?

Which of the following lists are all errors that affect the accuracy and reliability of the Satellite-Assisted Navigation system (GNSS/GPS)?

On a DME, display counters rotating throughout their range indicates

The reason why the measured distance between a NAVSTAR/GPS satellite navigation system satellite and a receiver is called a 'Pseudo-Range' is because the

For a conventional DME facility 'Beacon Saturation' will occur whenever the number of simultaneous interrogations exceeds

Loran C coverage is

The maximum theoretical range at which an aircraft at FL80 can obtain bearings from a ground VDF facility sited 325 FT above MSL is

If an aircraft flies along a VOR radial it will follow a

The OUTER MARKER of an Instrument Landing System (ILS) facility transmits on a frequency of

The maximum theoretical range at which an aircraft at FL210 may receive signals from a VOR facility sited 340 feet above mean sea level is approximately

The maximum pulse repetition frequency (PRF) that can be used by a primary radar facility in order to detect targets unambiguously at a range of 50 NM is:(pps = pulses per second)

What airborne equipment, if any, is required to be fitted in order that a VDF letdown may be flown?

Assuming sufficient transmission power, the maximum range of a ground radar with a pulse repetition frequency of 450 pulses per second is: (Given: velocity of light is 300 000 km/second)

The ATC transponder system,excluding Mode S, contains