WorksheetsSYS 5 - 3
Total questions: 79
Worksheet time: 40mins
The TCAS (Traffic Collision Avoidance System) gives avoidance resolutions:
in horizontal and vertical planes
only in the horizontal plane
only in the vertical plane
In the event of a conflict, the TCAS (Traffic Collision Avoidance System) will give information such as:
climb/descent
turn left/turn right
too low terrain
The principle of the TCAS (Traffic Collision Avoidance Systems) is based on the use of:
airborne weather radar system
transponders fitted in the aircraft
F.M.S. (Flight Management System)
The TCAS (Traffic Collision Avoidance System) computer receives information: 1- about the pressure altitude through the mode S transponder 2- from the radio altimeter 3- specific to the airplane configuration 4- from the inertial units The combination regrouping all the correct statements is:
1, 2, 3, 4
1, 2, 3
1, 2, 4
When the intruding aircraft is equipped with a transponder without altitude reporting capability, the TCAS (Traffic Collision Avoidance System) issues a:
"traffic advisory" and vertical "resolution advisory".
"traffic advisory" only.
"traffic advisory" and horizontal "resolution advisory"
On a TCAS2 (Traffic Collision Avoidance System), a corrective "resolution advisory" (RA) is a "resolution advisory":
which does not require any action from the pilot but on the contrary asks him not to modify his current vertical speed rate.
asking the pilot to modify effectively the vertical speed of his aircraft.
asking the pilot to modify the heading of his aircraft.
An "intruding traffic advisory" is represented on the display system of the TCAS 2 (Traffic Collision Avoidance System) by displaying:
a red full square.
a blue or white full lozenge.
a yellow full circle.
A "resolution advisory" (RA) is represented on the display system of the TCAS 2 (Traffic Collision Avoidance System) by a :
red full square.
blue or white full lozenge.
blue or white empty lozenge.
A "close traffic advisory" is displayed on the display device of the TCAS 2 (Traffic Collision Avoidance System) by:
an orange full circle.
a blue or white empty lozenge.
a blue or white full lozenge
The TCAS II data display devices can be in the form of: 1- a specific dedicated screen 2- a screen combined with the weather radar 3- a variometer represented on a liquid crystal screen which allows the display of Traffic Advisory (TA) and Resolution Advisory (RA) 4- an EFIS (Electronic Flight Instrument System) screen The combination regrouping all the correct statements is:
1, 2 and 3.
1, 2, 3 and 4.
3 and 4
A "TCAS II" (Traffic Collision Avoidance System) provides:
the intruder relative position and possibly an indication of a collision avoidance manoeuvre within both the vertical and horizontal planes.
a simple intruding airplane proximity warning.
the intruder relative position and possibly an indication of a collision avoidance manoeuvre within the vertical plane only.
In order to establish what radial you are on, you could
Read the OBS when the CDI is centred and the TO/FROM is showing TO
Rotate the OBS until the CDI gets centred and the TO/FROM indicator is showing FROM. Then read the radial on the OBS
Turn the OBS to make the TO/FROM change from TO to FROM. The OBS is now indicating the radial you are on
Which of the following will give the most accurate calculation of aircraft ground speed?
An ADF sited on the flight route
A DME station sited on the flight route
A VOR station sited on the flight route
Distance Measuring Equipment (DME) operates in the:
UHF band and is a primary radar system
VHF band and uses the principle of phase comparison
UHF band and is a secondary radar system
The amplitude modulation and the colour of an outer marker (OM) is:
400 Hz, blue
3000 Hz, blue
1300 Hz, blue
An aircraft tracking to intercept the Instrument Landing System (ILS) localizer inbound on the approach side, outside the published ILS coverage angle:
will receive signals without identification coding
will not normally receive signals
may receive false course indications
Inner marker transmits on 75 MHz and has an aural frequency of:
1300 Hz
400 Hz
3000 Hz
Middle marker transmits on 75 MHz and has an aural frequency of:
1300 Hz
400 Hz
3000 Hz
The MIDDLE MARKER of an Instrument Landing System (ILS) facility is identified audibly and visually by a series of:
alternate dots and dashes and an amber light flashing
two dashes per second and a blue light flashing
dots and a white light flashing
Which of the following is an ILS localiser frequency?
112.10 MHz
108.25 MHz
109.15 MHz
What approximate rate of descent is required in order to maintain a 3° glidepath at a groundspeed of 90 kt?
450 FT/MIN
400 FT/MIN
600 FT/MIN
Which of the following frequencies are used by ILS?
109,35 MHz
111,10 MHz
A and B above
The glide path transmitter operates on
36 VHF frequencies, paired with localizer frequencies
The frequencies 90 and 150 MHz
40 frequencies from 329,15 MHz to 335,00 MHz
In an ILS system, the identification
Is transmitted with a tone of 1450 Hz
Is transmitted in morse by the localizer transmitter with a tone of 1020 Hz
Is transmitted by the localizer and the glidepath transmitters
On a standard radar display (PPI)
The time base is a sine curve
The time base is a linear, straight scale
The time base is made to rotate synchronously with the antenna in order to display bearing as well as range
A Primary radar operates on the principle of:
transponder interrogation
pulse technique
phase comparison
The maximum range of primary radar depends on:
pulse recurrence frequency
wave length
frequency
In a primary radar system
The aircraft plays the secondary role, just listening to the radar signals from the ground radar
All radio frequency energy is produced by the radar located at the radar site
The radar is primarily used for range-finding
A long-range surveillance radar will typically use a frequency of
1000 MHz
600 MHz
3000 MHz
A flight director system is:
an autopilot system without the servos.
an autopilot system is equipped with one servo to control the flight heading
an autopilot system is equipped with two servos to control aircraft in both of the heading and the attitude.
A sense antenna in ADF system is used:
to remove the ambiguity concerning whether the aircraft is heading to or from the transmitter.
to improve the signal from the ground station
to determine the direction of the ground station
The distance from the aircraft to the DME unit at the VORTAC ground station is displayed on:
PFD
ND
SD
Which of the following is one of the functions of the Course-Line-Computer in a basic Area Navigation (RNAV) system?
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 calculates cross track information for NDB approaches.
It transfers the information given by a VOR/DME station into tracking and distance indications to any chosen Phantom Station/waypoint.
In a simple RNAV system the phantom station will be designated by:
DME/DME.
VOR/VOR.
VOR/DME.
The IRS position can be updated:
at designated positions en-route and on the ground.
at selected waypoints and on the ground.
on the ground only.
The range to a required waypoint presented by RNAV system is:
plan range.
slant range.
plan range or slant range depending on RNAV settings.
Area navigation (RNAV) allow
the navigation from point A to point B without direct over flight of navigational aids.
decreasing the number of the VOR station en-route
decreasing the error of the signal received from the ground stations
In order to enter a waypoint that is designated by a VOR into an RNAV, the VOR:
does not have to be in range when entered or used
must be in range
does not have to be in range when entered but must be when used
Which one of the following lists information given by a basic VOR/DME-based Area Navigation System?
Crosstrack distance; alongtrack distance; angular course deviation
Aircraft position in latitude and longitude
Wind velocity
Which of the following lists information required to input a waypoint or 'Phantom Station' into a basic VOR/DME-based Area Navigation System?
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
In it's simplest form, RNAV may consist of
At least one VOR and 2 DME sets
A VOR/DME receiver with an associated navigation computer
ADF and VOR receivers with an associated navigation computer
What is the minimum number of satellites required by a GPS in order to obtain a three dimensional fix?
4
3
5
In a Satellite-Assisted Navigation system (GNSS/GPS) a position line is obtained by:
timing the period that is taken for a satellite's transmission to reach the aircraft's receiver
the aircraft's receiver measuring the phase angle of the signal received from a satellite in a known position
timing the period that is taken for a transmission from the aircraft's transmitter/receiver to reach and return from a satellite in a known position.
In which frequency band do Satellite-Assisted Navigation systems (GNSS/GPS) provide position information that is available to civil aircraft?
EHF
SHF
UHF
What is the minimum number of satellites required for a Satellite-Assisted Navigation System (GNSS/GPS) to carry out two dimensional operation?
5
4
3
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; satellite ephemeris; atmospheric propagation
Satellite clock; satellite ephemeris; atmospheric propagation
GPS satellites transmit on two L-band frequencies with different types of signals. Which of these are generally available for use by civil aviation?
L1-coarse acquisition (C/A) with selected availability (S/A)
L2-coarse acquisition (C/A)
L1-precise (P)
Which of the following lists all the parameters that can be determined by a GPS receiver tracking signals from 4 different satellites?
Latitude, longitude and altitude
Latitude, longitude and time
Latitude, longitude, altitude and time
Which of the following combinations of satellite navigation systems provide the most accurate position fixes in air navigation?
GLONASS and COSPAS-SARSAT
NNSS-Transit and GLONASS
NAVSTAR/GPS and GLONASS
Integration of the wide area augmentation system (WAAS) improves GPS accuracy to within
7.6 meters
15 meters
25 meters
The distance between a NAVSTAR/GPS satellite and receiver is:
determined by the time taken for the signal to arrive from the satellite multiplied by the speed of light
calculated from the Doppler shift of the known frequencies
calculated, using the WGS-84 reference system, from the known positions of the satellite and the receiver
The receiver aerial for a NAVSTAR/GPS system should be mounted:
under the fuselage in order to receive correction data transmitted by D-GPS stations
inside the tail fin to minimise the influence of reflections from the wing and fuselage
on the upper side of the fuselage in the vicinity of the centre of gravity.
The basic elements of the satellite navigation system NAVSTAR/GPS are the:
control, space and user segments
main control station, the monitoring station and the ground antennas
antenna, the receiver and the central control unit (CDU)
One of the tasks of the control segment of the satellite navigation system NAVSTAR/GPS is to:
manipulate the signals of selected satellites to reduce the precision of the position fix (Selective Availability SA)
manufacture and launch the satellites
monitor the status of the satellites
The main task of the user segment (receiver) of the satellite navigation system NAVSTAR/GPS is to:
select appropriate satellites automatically, to track the signals and to measure the time taken by signals from the satellites to reach the receiver
transmit signals which, from the time taken, are used to determine the distance to the satellite
to monitor the status of the satellites, determine their positions and to measure the time
One of the tasks of the space segment of the satellite navigation system NAVSTAR/GPS is to:
transmit signals which can be used, by suitable receivers, to determine time, position and velocity
transmit signals to suitable receivers and to monitor the orbital planes autonomously
compute the user position from the received user messages and to transmit the computed position back to the user segment
The required 24 NAVSTAR/GPS operational satellites are located on:
6 orbital planes with 3 satellites in each plane plus 6 reserve satellites positioned in a geostationary orbital plane
3 orbital planes with 8 satellites in each plane
6 orbital planes with 4 satellites in each plane
Which one of the following errors can be compensated for by a NAVSTAR/GPS receiver comparing L1 and L2 frequencies?
Ionospheric
Multipath
Tropospheri
GPS system satellites transmit their signals on two carrier waves 1575 MHz and 1227 MHz and supply two possible codes accessible according to user (civil or military). Commercial aviation uses:
only the 1 575 MHz carrier wave and two codes
only the 1 575 MHz carrier wave and one code
only the 1 227 MHz carrier wave and one code
What are the effects, if any, of shadowing by parts of the aircraft (e.g. wing) on the reception of signals from NAVSTAR/GPS satellites?
It may prevent the reception of signals
It causes multipath propagation
The signals will be distorted, however the error can be corrected for using an algorithm and information from unaffected signals
In relation to the NAVSTAR/GPS satellite navigation system, what is involved in the differential technique (D-GPS)?
Receivers from various manufacturers are operated in parallel to reduce the characteristical receiver noise error
The difference between signals transmitted on the L1 and L2 frequencies are processed by the receiver to determine an error correction
Fixed ground stations compute position errors and transmit correction data to a suitable receiver on the aircraft
The satellites used in the GPS
Are geostationary
Do not cross the plane of the Equator
Orbit the Earth at an altitude of about 20,200 km
Using GPS, the primary position information is in the form of
Spheres, with the satellites in the centre of the spheres
Spheres, with the airplane in the centre of the spheres
Bearing and distance from the satellite
the wide area augmentation system (WAAS) was developed. It consists of
approximately 25 precisely surveyed ground stations
approximately 225 precisely surveyed ground stations
approximately 75 precisely surveyed ground stations
The WAAS system is known to reduce position errors to:
1-3 meters laterally and vertically.
About 5 meters laterally and vertically
10 meters laterally and vertically
The GPS satellite system consists of.
20 satellites and 5 standby satellite.
21 satellites and 3 standby satellites.
24 satellites and 1 standby satellites.
Before the aeroplane is moved from the loading pier, the pilot must.
insert the latitude and longitude of the pier into the INS.
insert the latitude and longitude of the first waypoint into the INS.
set the altitude to be fed into the INS.
A laser gyro output is.
inversely proportional to angular turning rate.
directly proportional to frequency addition.
directly proportional to angular turning rate.
The type of gyro generally used in an IN system is a.
rate gyro.
rate integrating gyro.
displacement gyro.
An IN system requires data from the.
air data computer.
Doppler system.
satellites.
What must be entered in to the I.N.S. before the aircraft moves?
Present position.
E.T.A.
Waypoints
Laser gyros have.
no rotating parts.
rotating parts.
moving parts.
In an Inertial Navigation System (INS), Ground Speed (GS) is calculated:
from TAS and W/V from RNAV data
from TAS and W/V from Air Data Computer (ADC)
by integrating measured acceleration
What is the name given to an Inertial Reference System (IRS) which has the gyros and accelerometers as part of the unit's fixture to the aircraft structure?
Solid state
Rigid
Strapdown
In a strap down INS the accelerometers are oriented with their axes
With the local vertical, True North and True East
With the lateral axis of the aircraft, True North/South and True East/West
Along yaw, longitudinal and lateral axis of the aircraft
Few modern INS systems use a mechanically stabilised platform and mechanical gyros. These components has been replaced by
Rotating accelerometers and analogue computers
Strap down Ring laser gyros and accelerometers plus advanced digital computers
A digital horizon and gyrosyn true-reading compass
Which of the following statements concerning the loss of alignment by an Inertial Reference System (IRS) in flight is correct?
It is not usable in any mode and must be shut down for the rest of the flight
The IRS has to be coupled to the remaining serviceable system and a realignment carried out in flight in-flight realignment
The navigation mode, including present position and ground speed outputs, is inoperative for the remainder of the flight
Where and when are the IRS positions updated?
During flight IRS positions are automatically updated by the FMC
Only on the ground during the alignment procedure
IRS positions are updated by pressing the 'Take-off/ Go-around' button at the start of the take-off roll
The sensors of an INS measure:
precession
velocity
acceleration
