Vayudoot Aviation

1.
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

2.
The two main design functions of Secondary Surveillance Radar (SSR) Mode S are

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

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

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

200 feet above the runway threshold

50 feet above ILS reference point

200 feet above the inner marker

runway surface

4.
Which frequency band is used by VOR transmissions?

SHF

HF

UHF

VHF

5.
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?

Eight

Four

Six

Two

6.
Complete the following statement. Aircraft Surface movement Radar operates on frequencies in the (i) .......... band employing an antenna that rotates at approximately (ii) .......... revolutions per minute, it is (iii) ......... possible to determine the type of aircraft from the return on the radar screen

(i) SHF (ii) 60 (iii) sometimes

(i) SHF (ii) 10 (iii) always

(i) EHF (ii) 30 (iii) never

(i) EHF (ii) 100 (iii) never

7.
The code transmitted by a SSR transponder consists of

pulses

phase differences

frequency differences

amplitude differences

8.
A VOR is sited at position 58°00'N 073°00'W where the magnetic variation equals 32°W.An aircraft is located at position 56°00'N 073°00'W where the magnetic variation equals 28°W.The aircraft is on VOR radial

360

180

208

212

9.
A DME station is located 1000 feet above MSL. An aircraft flying at FL 370, 15 NM away from the DME station, will have a DME reading of

16 NM

15 NM

17 NM

14 NM

10.
The OUTER MARKER of an Instrument Landing System (ILS) facility transmits on a frequency of

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

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

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

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

11.
The maximum range of primary radar depends on

frequency

wave length

pulse length

pulse recurrence frequency

12.
Under JAR-25 colour code rules for Electronic Flight Instrument Systems (EFIS), the active route/flight plan is coloured

cyan

magenta

yellow

green

13.
Which of the following combinations of satellite navigation systems provide the most accurate position fixes in air navigation?

GLONASS and COSPAS-SARSAT

NAVSTAR/GPS and NNSS-Transit

NAVSTAR/GPS and GLONASS

NNSS-Transit and GLONASS

14.
An airway 10 NM wide is to be defined by two VORs each having a resultant bearing accuracy of plus or minus 5.5°. In order to ensure accurate track guidance within the airway limits the maximum distance apart for the transmitter is approximately

105 NM

50 NM

165 NM

210 NM

15.
GPS system satellites transmit their signals on two carrier waves 1575 MHz and 1227 MHz and supply two possible codes accessible acording to user (civil or military).Commercial aviation uses

the two carrier waves and one public code

only the 1 227 MHz carrier wave and one code

only the 1 575 MHz carrier wave and one code

only the 1 575 MHz carrier wave and two codes

16.
Which of the following statements concerning the L1 and L2 NAVSTAR/GPS transmission frequencies and codes is correct?

The lower frequency is used to transmit both the C/A and P codes

C/A and P codes are transmitted at different times on both frequencies

The higher frequency is used to transmit both the C/A and P codes

The higher frequency is only used to transmit the P code

17.
A DME that has difficulty obtaining a ""lock-on"":(NOTE: PRF = pulse recurrence frequency, PPS = pulses per second)

stays in search mode but reduces PRF to max. 60 PPS after 100 seconds

stays in search mode but reduces PRF to max. 60 PPS after 15000 pulse pairs have been transmitted

stays in search mode without a reduction in PRF

alternates search mode with periods of memory mode lasting 10 seconds

18.
Almanac data stored in the receiver of the satellite navigation system NAVSTAR/GPS is used for the

assignment of received PRN-codes (Pseudo Random Noise) to the appropriate satellite

recognition wether Selective Availability (SA) is operative

fast identification of received signals coming from visible satellites

correction of receiver clock error

19.
In the NAVSTAR/GPS satellite navigation system, 'Selective Availability' (SA) gives the option to artificially degrade the accuracy by

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

dithering the satellite clock

shutting off selected satellites

offsetting satellite atomic clocks by a predetermined constant amount

20.
What approximate rate of descent is required in order to maintain a 3° glidepath at a groundspeed of 90 kt?

700 FT/MIN

450 FT/MIN

600 FT/MIN

400 FT/MIN

21.
DME channels utilise frequencies of approximately

600 MHz

110 MHz

1000 MHz

300 MHz

22.
Which one of the following Secondary Surveillance Radar (SSR) codes should be used by aircraft entering airspace from an area where SSR operation has not been required?

5000

7000

2000

23.
The receiver aerial for a NAVSTAR/GPS system should be mounted

on the upper side of the fuselage in the vicinity of the centre of gravity

inside the tail fin to minimise the influence of reflections from the wing and fuselage

under the fuselage in order to receive correction data transmitted by D-GPS stations

in the vicinity of the receiver to avoid long transmission lines

24.
How does a NAVSTAR/GPS satellite navigation system receiver recognise which of the received signals belongs to which satellite?

The receiver detects the direction from which the signals are received and compares this information with the calculated positions of the satellites

The Doppler shift is unique to each satellite

Each satellite transmits its signal, on common frequencies, with an individual Pseudo Random Noise code

Each satellite transmits its signal on a separate frequency

25.
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) phases

(i) different (ii) modulation frequencies

(i) the same (ii) modulation frequencies

(i) the same (ii) phases

26.
In order to obtain an ADF bearing the

BFO switch must be selected to 'ON'

mode selector should be switched to 'loop'

signal must be received by both the sense and loop aerials

sense aerial must be tuned separately

27.
An Omni-bearing selector (OBS) shows full deflection to the left when within range of a serviceable VOR. What angular deviation are you from the selected radial?

10° or more

1.5° or more

2.5 or more

less than 10°

28.
An RMI slaved to a remote indicating compass has gone unserviceable and is locked on to a reading of 090°. The tail of the VOR pointer shows 135°. The available information from the VOR is:Radial 135°, relative bearing unknown

Radial unknown, relative bearing 045°

Radial 135°, relative bearing unknown

Radial unknown, relative bearing 225°

Radial 315°, relative bearing unknown

29.
Factors liable to affect most NDB/ADF system performance and reliability include

coastal refraction - lane slip - mountain effect

static interference - night effect - absence of failure warning system

static interference - station interference - latitude error

height error - station interference - mountain effect

30.
The ISO-ECHO facility of an airborne weather radar is provided in order to

detect areas of possible severe turbulence in cloud

inhibit unwanted ground returns

extend the mapping range

give an indication of cloud tops

31.
A weather radar, set to the 100 NM scale, shows a squall at 50NM. By changing the scale to 50 NM, the return on the radar screen should

decrease in area and move to the top of the screen

decrease in area but not change in position on the screen

increase in area and move to the top of the screen

increase in area and appear nearer to the bottom of the screen

32.
Loran C coverage is

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

confined to certain limited areas of the world

global

unrestricted between latitudes 70°N and 70°S

33.
What airborne equipment, if any, is required to be fitted in order that a VDF letdown may be flown?

VOR

VOR/DME

VHF radio

none

34.
Which one of the following disturbances is most likely to cause the greatest inaccuracy in ADF bearings?

Precipitation interference

Coastal effect

Quadrantal error

Local thunderstorm activity

35.
The principle used in VOR bearing measurement is:phase comparison

phase comparison

difference in depth of modulation

envelope matching

beat frequency discrimination

36.
The track-line on the Electronic Horizontal Situation Indicator (EHSI) or Navigation Display of an Electronic Flight Instrument System

indicates to the pilot that a manually selected heading is being flown

represents the track of the aircraft over the ground. When it co-incides with the desired track, wind influence is compensated for

indicates that the pilot has made a manual track selection

corresponds to the calculated IRS TH and is correct during turns

37.
Which of the following frequency-bands is used by the Loran C navigation system?

1750 - 1950 kHz

90 - 110 kHz

10.2 - 13.6 kHz

978 - 1213 MHz

38.
Which one of the following inputs to an Area Navigation System (R-NAV) comes from an external, not on-board, system?

Pressure altitude

Inertial Navigation System (INS) position

VOR/DME radial/distance

Magnetic heading

39.
Which of the following coordinate systems is used by the GPS receiver to determine position (Latitude, longitude and altitude)?

ED 87

EUREF 92

WGS 84

ED 50

40.
The aircraft DME receiver cannot lock on to interrogation signals reflected from the ground because

DME transmits twin pulses

aircraft transmitter and DME ground station are transmitting on different frequencies

reflections are subject to doppler frequency shift

DME pulse recurrence rates are varied

41.
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 hyperbolic navigation system that works on the principle of differential range by pulse technique

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

42.
In which of the following cases would ETOs and ETA at destination calculated by the Flight Management Computer (FMC) be correct?

When the FMC positions and GS are accurate

When the FMC computes each ETO and ETA using the correct GS

When the actual winds match the forecast winds, and the actual cruising Mach number is equal to the FMC calculated Mach number

When the ETOs and ETA are based on the forecast winds calculated from the actual takeoff time

43.
A DME is located at MSL.An aircraft passing vertically above the station at flight level FL 360 will obtain a DME range of approximately

7 NM

11 NM

6 NM

8 NM

44.
The amplitude modulation and the colour of an outer marker (OM) is

1300 Hz, blue

400 Hz, amber

400 Hz, blue

3000 Hz, blue

45.
Which of the following lists information required to input a waypoint or 'Phantom Station' into a basic VOR/DME-based Area Navigation System?

Radials from a minimum of two VORs to the waypoint or 'Phantom Station'

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

Magnetic track and distance from the aircraft to the waypoint or 'Phantom Station'

Magnetic track and distance to a VOR/DME from the waypoint or 'Phantom Station'

46.
The geometric shape of the reference system for the satellite navigation system NAVSTAR/GPS, defined as WGS 84, is

a geoid

a sphere

a mathematical model that describes the exact shape of the earth

an ellipsoid

47.
An aircraft carrying out a 3° glidepath ILS approach experiences a reduction in groundspeed from 150 kt at the outer marker to 120 kt over the threshold. The effect of this change in groundspeed on the aircraft's rate of descent will be a decrease of approximately

150 FT/MIN

50 FT/MIN

250 FT/MIN

100 FT/MIN

48.
Which of the following is an advantage of Ground/DF (VDF) let-down?

It is pilot interpreted and does not require the assistance of ATC

It only requires a VHF radio to be fitted to the aircraft

It does not require any special equipment to be fitted to the aircraft

It does not require any special equipment, apart from a VHF radio, to be installed in the aircraft or on the ground

49.
Which of the following Secondary Surveillance Radar (SSR) codes is used to indicate transponder malfunction?

4096

7600

9999

50.
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) pulse recurrence frequency

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

(i) pulse length (ii) pulse recurrence frequency

(i) transmission frequency (ii) transmitter power output

Question Bank

Questions for INDIGO RADIO NAVIGATION

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

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

Which frequency band is used by VOR transmissions?

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?

The code transmitted by a SSR transponder consists of

A VOR is sited at position 58°00'N 073°00'W where the magnetic variation equals 32°W.An aircraft is located at position 56°00'N 073°00'W where the magnetic variation equals 28°W.The aircraft is on VOR radial

A DME station is located 1000 feet above MSL. An aircraft flying at FL 370, 15 NM away from the DME station, will have a DME reading of

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

The maximum range of primary radar depends on

Under JAR-25 colour code rules for Electronic Flight Instrument Systems (EFIS), the active route/flight plan is coloured

Which of the following combinations of satellite navigation systems provide the most accurate position fixes in air navigation?

An airway 10 NM wide is to be defined by two VORs each having a resultant bearing accuracy of plus or minus 5.5°. In order to ensure accurate track guidance within the airway limits the maximum distance apart for the transmitter is approximately

GPS system satellites transmit their signals on two carrier waves 1575 MHz and 1227 MHz and supply two possible codes accessible acording to user (civil or military).Commercial aviation uses

Which of the following statements concerning the L1 and L2 NAVSTAR/GPS transmission frequencies and codes is correct?

A DME that has difficulty obtaining a ""lock-on"":(NOTE: PRF = pulse recurrence frequency, PPS = pulses per second)

Almanac data stored in the receiver of the satellite navigation system NAVSTAR/GPS is used for the

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

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

DME channels utilise frequencies of approximately

Which one of the following Secondary Surveillance Radar (SSR) codes should be used by aircraft entering airspace from an area where SSR operation has not been required?

The receiver aerial for a NAVSTAR/GPS system should be mounted

How does a NAVSTAR/GPS satellite navigation system receiver recognise which of the received signals belongs to which satellite?

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)..........

In order to obtain an ADF bearing the

An Omni-bearing selector (OBS) shows full deflection to the left when within range of a serviceable VOR. What angular deviation are you from the selected radial?

An RMI slaved to a remote indicating compass has gone unserviceable and is locked on to a reading of 090°. The tail of the VOR pointer shows 135°. The available information from the VOR is:Radial 135°, relative bearing unknown

Factors liable to affect most NDB/ADF system performance and reliability include

The ISO-ECHO facility of an airborne weather radar is provided in order to

A weather radar, set to the 100 NM scale, shows a squall at 50NM. By changing the scale to 50 NM, the return on the radar screen should

Loran C coverage is

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

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

The principle used in VOR bearing measurement is:phase comparison

The track-line on the Electronic Horizontal Situation Indicator (EHSI) or Navigation Display of an Electronic Flight Instrument System

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

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

Which of the following coordinate systems is used by the GPS receiver to determine position (Latitude, longitude and altitude)?

The aircraft DME receiver cannot lock on to interrogation signals reflected from the ground because

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

In which of the following cases would ETOs and ETA at destination calculated by the Flight Management Computer (FMC) be correct?

A DME is located at MSL.An aircraft passing vertically above the station at flight level FL 360 will obtain a DME range of approximately

The amplitude modulation and the colour of an outer marker (OM) is

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

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

An aircraft carrying out a 3° glidepath ILS approach experiences a reduction in groundspeed from 150 kt at the outer marker to 120 kt over the threshold. The effect of this change in groundspeed on the aircraft's rate of descent will be a decrease of approximately

Which of the following is an advantage of Ground/DF (VDF) let-down?

Which of the following Secondary Surveillance Radar (SSR) codes is used to indicate transponder malfunction?

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