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Question Bank
Questions for INDIGO RADIO NAVIGATION
Answer the following questions
Test Mode
Training Mode
1.
Which of the following is an ILS localiser frequency?
110.20 MHz
109.15 MHz
108.25 MHz
112.10 MHz
2.
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
height error - station interference - mountain effect
static interference - station interference - latitude error
3.
The BFO selector on an ADF receiver is used to
hear the IDENT of some NDB stations radiating a continuous wave signal
find the loop 'null' position
hear the IDENT and must always be switched ON
stop loop rotation
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
range from cloud,wavelength/frequency used
rotational speed of radar scanner,range from cloud
size of the water drops,diameter of radar scanner
5.
Which of the following combinations is likely to result in the most accurate Area Navigation (RNAV) fixes?
DME/DME
NDB/VOR
VOR/DME
VOR/VOR
6.
Given:VOR station position N61° E025°, variation 13°E,Estimated position of an aircraft N59° E025°, variation 20°E.What VOR radial is the aircraft on?
160°
193°
347°
167°
7.
How does a receiver of the NAVSTAR/GPS satellite navigation system determine the elevation and azimuth data of a satellite relative to the location of the antenna?
The data is based on the direction to the satellite determined at the location of the antenna
It calculates it by using Almanac data transmitted by the satellites
The data is stored in the receiver together with the Pseudo Random Noise (PRN) code
The data is determined by the satellite and transmitted together with the navigation message
8.
Quadrantal errors associated with aircraft Automatic Direction Finding (ADF) equipment are caused by
skywave/groundwave contamination
signal bending caused by electrical interference from aircraft wiring
misalignment of the loop aerial
signal bending by the aircraft metallic surfaces
9.
Which of the following coordinate systems is used by the GPS receiver to determine position (Latitude, longitude and altitude)?
ED 87
EUREF 92
ED 50
WGS 84
10.
Outer marker transmits on 75 MHz and has an aural frequency of
3000 Hz
400 Hz
2000 Hz
1300 Hz
11.
A frequency of airborne weather radar is
9375 MHz
93.75 MHz
9375 kHz
9375 GHz
12.
Which of the following is one of the functions of the Course-Line-Computer in a basic Area Navigation (RNAV) system?
It transfers the information given by a VOR/DME station into tracking and distance indications to any chosen Phantom Station/waypoint
It automatically selects the two strongest transmitters for the Area-Nav-Mode and continues working by memory in case one of the two necessary station goes off the air
It checks the ground station accuracy using a built-in test programme
It calculates cross track information for NDB approacheS
13.
When Mode C is selected on the aircraft SSR transponder the additional information transmitted is
altitude based on regional QNH
height based on QFE
flight level based on 1013.25 hPa
aircraft height based on sub-scale setting
14.
Which of the following statements about the accuracy that can be obtained with the differential technique (D-GPS) of the satellite navigation system NAVSTAR/GPS is correct?
A D-GPS receiver can detect and correct for SA providing a more accurate position fix
The nearer a receiver is situated to a D-GPS ground station, the more accurate the position fix
Only D-GPS allows position fixes accurate enough for 'Non Precision Approaches'
The increase in accuracy of position fixes is independent of the receiver position in relation to a D-GPS ground station
15.
In a primary radar using pulse technique, pulse recurrence frequency (PRF)/pulse recurrence rate (PRR) determines
maximum theoretical range
target discrimination
beam width
minimum range
16.
In relation to the satellite navigation system NAVSTAR/GPS, the term 'inclination' denotes the angle between the
horizontal plane at the location of the receiver and the orbital plane of a satellite
horizontal plane at the location of the receiver and the direct line to a satellite
orbital plane and the equatorial plane
orbital plane and the earth's axis
17.
Which one of the following inputs to an Area Navigation System (R-NAV) comes from an external, not on-board, system?
Magnetic heading
Inertial Navigation System (INS) position
VOR/DME radial/distance
Pressure altitude
18.
The azimuth transmitter of a Microwave Landing System (MLS) provides a fanshaped horizontal approach zone which is usually
+ or - 50° of the runway centre-line
+ or - 30° of the runway centre-line
+ or - 60° of the runway centre-line
+ or - 40° of the runway centre-line
19.
An aircraft is 100 NM from a VOR facility. Assuming no error when using a deviation indicator where 1 dot = 2° deviation, how many dots deviation from the centre line of the instrument will represent the limits of the airway boundary? (Assume that the airway is 10 NM wide)
6.0
4.5
1.5
3.0
20.
Which of the following gives the best information about the progress of a flight between 2 en-route waypoints from a RNAV equipment?
Elapsed time on route.
ETD
ATA
ETO
21.
Given:Magnetic heading 280°VOR radial 090°What bearing should be selected on the omni-bearing selector in order to centralise the VOR deviation needle with a ""TO"" indication?
270°
090°
100°
280°
22.
Which of the following lists information required to input a waypoint or 'Phantom Station' into a basic VOR/DME-based Area Navigation System?
Magnetic track and distance to a VOR/DME from the waypoint or 'Phantom Station'
Magnetic track and distance from the aircraft to the waypoint or 'Phantom Station'
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'
23.
In a Satellite-Assisted Navigation System (GNSS/GPS), a fix is obtained by
measuring the time taken for a minimum number of satellites' transmissions, in known positions, to reach the aircraft's receiver
the aircraft's receiver measuring the phase angle of signals received from a number of satellites in known positions
measuring the pulse lengths of signals received from a minimum number of satellites received in a specific sequential order
measuring the time taken for an aircraft's transmissions to travel to a number of satellites, in known positions, and return to the aircraft's receiver
24.
What is the approximate maximum theoretical range at which an aircraft at FL130 could receive information from a VDF facility which is sited 1024 FT above MSL?
120 NM
150 NM
220 NM
180 NM
25.
A Cat III ILS glidepath transmitter provides reliable guidance information down to
a maximum height of 100 ft above the runway
a maximum height of 200 ft above the runway
a maximum height of 50 ft above the runway
the surface of the runway
26.
Which one of the following methods is used by a Microwave Landing System (MLS) to indicate distance from the runway threshold?
Timing the interval between the transmission and reception of primary radar pulses from the aircraft to MLS station
Timing the interval between the reception of sequential secondary radar pulses from the MLS station to the aircraft
Measurement of the frequency shift between the MLS azimuth and elevation transmissions
A DME co-located with the MLS transmitters
27.
In which navigation system does the master station transmit a continuous string of pulses on a frequency close to 100 kHz?
Doppler
Decca
GPS
Loran C
28.
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
29.
The rate of descent required to maintain a 3.25° glide slope at a groundspeed of 140 kt is approximately
670 FT/MIN
800 FT/MIN
850 FT/MIN
700 FT/MIN
30.
Under JAR-25 colour code rules for Electronic Flight Instrument Systems (EFIS), selected data and values are coloured
magenta
green
yellow
white
31.
Under JAR-25 colour code rules for Electronic Flight Instrument Systems (EFIS), increasing intensity of precipititation are coloured in the order
amber/yellow, magenta, black
black, amber/yellow, magenta, red
green, amber/yellow, red, magenta
green, red, magenta, black
32.
Precision RNAV (P-RNAV) requires a track-keeping accuracy of
0.5 NM standard deviation or better
1.0 NM standard deviation or better
0.25 NM standard deviation or better
1.5 NM standard deviation or better
33.
A Category 1 Instrument Landing System (ILS) ground installation provides accurate guidance from coverage limit down to
runway surface
50 feet above ILS reference point
200 feet above the inner marker
200 feet above the runway threshold
34.
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
The higher frequency is only used to transmit the P code
The higher 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
35.
The maximum range obtainable from an ATC Long Range Surveillance Radar is approximately
400 NM
200 NM
300 NM
100 NM
36.
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
8 NM
6 NM
7 NM
11 NM
37.
How does the Electronic Flight Instrument System display of a B737-400 respond to the failure of a VHF navigation (VOR) receiver?
It removes the associated magenta deviation bar and/or pointer from the display
The pointer flashes and a VOR 1 or 2 failure warning bar appears
The pointer rotates around the display and a VOR 1 or 2 failure warning bar appears
The deviation bar and/or pointer change colour to red and flash intermittently
38.
Which one of the following errors can be compensated for by a NAVSTAR/GPS receiver comparing L1 and L2 frequencies?
Ionospheric
Tropospheric
Multipath
Receiver noise
39.
What is the wavelength of an NDB transmitting on 375 kHZ?
80 m
8000 m
800 m
8 m
40.
The maximum range of primary radar depends on
pulse recurrence frequency
wave length
frequency
pulse length
41.
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
shutting off selected satellites
offsetting satellite atomic clocks by a predetermined constant amount
dithering the satellite clock
42.
Which one of the following sensors/systems is self-contained and obtains no external information?
Pressure altitude
VOR/DME radial/distance
Inertial Navigation System (INS) position
Magnetic heading
43.
What datum is used for the Minimum Descent Altitude (MDA) on a non-precision approach when using the NAVSTAR/GPS satellite navigation system?
GPS altitude
If using Differential-GPS (D-GPS) the altitude obtained from the D-GPS, otherwise barometric altitude
Radar altitude
Barometric altitude
44.
What is the colour sequence when passing over an Outer, Middle and Inner Marker beacon?
amber - white - green
white - amber - blue
blue - amber - white
blue - green - white
45.
At what approximate height above the WGS-84 ellipsoid are NAVSTAR/GPS satellites circling the earth?
19500 km
36000 km
10900 km
20200 km
46.
In order to ascertain whether a cloud return on an Aircraft Weather Radar (AWR) is at or above the height of the aircaft, the tilt control should be set to: (Assume a beam width of 5°)
2.5° up
0°
5° up
2.5° down
47.
An aircraft is flying on the true track 090° towards a VOR station located near the equator where the magnetic variation is 15°E. The variation at the aircraft position is 8°E.The aircraft is on VOR radial
255°
278°
262°
285°
48.
The Doppler Navigation System is based on
radar principles using frequency shift
doppler VOR (DVOR) Navigation System
radio waves refraction in the ionosphere
phase comparison from ground station transmissions
49.
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 VOR/ILS, EXP VOR/ILS and PLAN
FULL NAV, PLAN and MAP
EXP VOR/ ILS, PLAN and MAP
FULL NAV, FULL VOR/ILS and PLAN
50.
Under JAR-25 colour code rules for Electronic Flight Instrument Systems (EFIS), the active route/flight plan is coloured
cyan
green
magenta
yellow
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