Un compte Premium offert sur le site FCL.055 ! Rendez-vous sur www.fcl055-exam.fr puis créez un compte avec le même email que celui...   [Lire la suite]


Question 192-1 : You are flying along an airway which is 10 nm wide 5 nm either side of the centreline .the distance to the vor/dme you are using is 100 nm .if you are on the airway boundary how many dots deviation will the vor needle show if one dot represents 2 degrees ? [ Level reports ]

1 5

.apply the 1 in 60 rule.= max distance off route x 60 / range.= 5 x 60/ 100.= 300/100.= 3°.2° = 1 dot.3° = 1 5 dots exemple 292 1.5

Question 192-2 : 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

Admin .tan 5 5 x x = 10 nm.x = 10 / 0 0962 = 103 9 nm .miloszhomik .10 nm wide but 5 to each side so it will be approx 50 nm .. .approximately 50 nm if you consider only the beacon behind you but when you switch to the beacon in front of you the maximum distance apart for the transmitter will be approximately 52 5 + 52 5 = 105 nm exemple 296 105 nm.

Question 192-3 : An aircraft is required to approach a vor via the 104° radial .which of the following settings should be made on the vor/ils deviation indicator ?

284° with the to flag showing

Admin .for training purpose please use .luizmonteiro learning vor exemple 300 284° with the to flag showing.

Question 192-4 : An aircraft is required to approach a vor station via the 244° radial .in order to obtain correct sense indications the deviation indicator should be set to ?

064° with the to flag showing

Admin . 1710.for training purpose .luizmonteiro learning vor exemple 304 064° with the to flag showing.

Question 192-5 : What is the maximum theoretical range that an aircraft at fl150 can receive signals from a vor situated 609 feet above msl ?

181 nm

1 23* sqrt609 + sqrt15000 = 181 nm . sqrt square root exemple 308 181 nm.

Question 192-6 : For a conventional dme facility beacon saturation will occur whenever the number of aircraft interrogations exceeds ?

100

.a typical dme transponder can provide distance information to 100 aircraft at a time above this limit the transponder avoids overload by limiting the gain of the receiver replies to weaker more distant interrogations are ignored to lower the transponder load .dme can be used by 300 users at one time the technical term of the dme station when its overloaded and cannot accept more than 100 aircraft is called station or beacon saturation exemple 312 100.

Question 192-7 : The aircraft dme receiver is able to accept replies to its own transmissions and reject replies to other aircraft interrogations because ?

The time interval between pulse pairs is unique to that particular aircraft

Admin .the interrogation and reply frequencies always differ by 63 mhz .the time interval between pulse pairs is unique because the pulse recurrence frequency is randomised exemple 316 The time interval between pulse pairs is unique to that particular aircraft.

Question 192-8 : The aircraft dme receiver cannot lock on to interrogation signals reflected from the ground because ?

Aircraft transmitter and dme ground station are transmitting on different frequencies

Admin .the interrogation pulses are at one frequency 1030 mhz and the reply pulses are at a different frequency 1090 mhz exemple 320 Aircraft transmitter and dme ground station are transmitting on different frequencies.

Question 192-9 : The design requirements for dme n stipulate that at a range of 100 nm the maximum systematic error should not exceed ?

+ or 1 5 nm

Admin .the error of the dme 'n' according to annex 10 should not exceed + 0 25 nm + 1 25% of the distance measured .0 25 + 0 0125 x 100 = 1 5 nm . for installations installed after 1 jan 1989 the total system error should not exceed 0 2 nm for dme 'p' precise exemple 324 + or - 1.5 nm.

Question 192-10 : In which situation will speed indications on an airborne distance measuring equipment dme most closely represent the groundspeed of an aircraft flying at fl400 ?

When tracking directly towards the station at a range of 100 nm or more

Admin .the dme instrument in the cockpit will not only show your distance to a station but will calculate the rate of movement and display groundspeed .if you are to close you will have a 'slant range' the distance mesured is the from the station to the aircraft and not from your equivalent position on the ground .at long distances this will be minimised . when passing abeam the station and within 5 nm and at a range of 10 nm will not give you the most accurate groundspeed indication . overhead the station will give you a grounspeed indication of zero exemple 328 When tracking directly towards the station at a range of 100 nm or more.

Question 192-11 : The time taken for the transmission of an interrogation pulse by a distance measuring equipment dme to travel to the ground transponder and return to the airborne receiver was 2000 micro second .the slant range from the ground transponder was ?

158 nm

. 2564.slant range= time 50 micro second /2 x c velocity of light in km/s .slant range= 2000 50 /2 x c.slant range= 975 x 300000.slant range= 292500000.292 500 km > 158 nm .50 micro second is the time taken by the airborne receiver to reply to the ground transponder and you must divide 2000 by 2 because 2000 micro second is the total time taken for a signal to travel and come back exemple 332 158 nm.

Question 192-12 : The reason why pre take off holding areas are sometimes further from the active runway when ils category 2 and 3 landing procedures are in progress than during good weather operations is ?

Aircraft manoeuvring near the runway may disturb guidance signals

exemple 336 Aircraft manoeuvring near the runway may disturb guidance signals.

Question 192-13 : An aircraft tracking to intercept the instrument landing system ils localiser inbound on the approach side outside the published ils coverage angle ?

May receive false course indications

Admin .false glideslope signals may exist outside the published ils coverage angle and in the area of the localizer back course approach which can cause the glideslope flag alarm to disappear and present unreliable glideslope information exemple 340 May receive false course indications.

Question 192-14 : 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

exemple 344 Alternate dots and dashes and an amber light flashing.

Question 192-15 : The outer marker of an instrument landing system ils facility transmits on a frequency of ?

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

Admin . 677 exemple 348 75 mhz and is modulated by morse at two dashes per second.

Question 192-16 : What approximate rate of descent is required in order to maintain a 3° glide path at a groundspeed of 120 kt ?

600 ft/min

Admin .3° glide > 5% rate of descent.divide speed by 2 add a zero exemple 352 600 ft/min.

Question 192-17 : 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

Admin .our heading information is false but the needle will give the correct magnetic bearings of the beacon .example you perform a 360° turn the heading remains locked on 090° on the rmi and the tail of the needle will remain against 135° .now you fly on a northerly heading the tail of the needle progressively shows 134° 133° 132° etc exemple 356 Radial 135°, relative bearing unknown.

Question 192-18 : What is the colour sequence when passing over an outer middle and inner marker beacon ?

Blue amber white

Admin . 2565 exemple 360 Blue - amber - white.

Question 192-19 : The vor system is limited to about 1° of accuracy one degree at 200 nm represents a width of ?

3 5 nm

Admin .use tangents to get the exact answer .tan1 x 200 = 3 5 nm.or apply the '1 in 60' rule .distance off track / distance gone = track error angle / 60.d/200 = 1/60.d = 200 x 1 /60.d = 3 33 nm approximately = 3 5 nm exemple 364 3.5 nm.

Question 192-20 : An aircraft is 'homing' to a radio beacon whilst maintaining a relative bearing of zero .if the magnetic heading decreases the aircraft is experiencing ?

Right drift

Admin . 2566.answer 'a wind from the west' is wrong in our example this is a wind from west but imagine if the airplane is heading south to the beacon the wind will be from the east exemple 368 Right drift.

Question 192-21 : In which frequency band do vor transmitters operate ?

Vhf

.vhf omni directional radio ranges operate in the very high frequency aviation navigation band between 108 to 117 95 mhz .as vhf transmissions are line of sight the ground to air range depends on the elevation of the beacon site the height of the aircraft and the power output exemple 372 Vhf.

Question 192-22 : In which frequency band does an ils glide slope transmit ?

Uhf

Admin .the uhf glideslope transmitter operating on one of the 40 ils channels within the frequency range 329 15 mhz to 335 00 mhz radiates its signals in the direction of the localizer front course the term 'glidepath' means that portion of the glideslope that intersects the localizer exemple 376 Uhf.

Question 192-23 : Which of the following is likely to have the greatest effect on adf accuracy ?

Interference from other ndbs particularly at night

.navigation using an adf to track ndbs is subject to several common effects . night effect radio waves reflected back by the ionosphere can cause signal strength fluctuations 30 to 60 nautical miles 54 to 108 km from the transmitter especially just before sunrise and just after sunset more common on frequencies above 350 khz . electrical effect electrical storms and sometimes also electrical interference from a ground based source or from a source within the aircraft can cause the adf needle to deflect towards the electrical source exemple 380 Interference from other ndbs, particularly at night.

Question 192-24 : Assuming a five dot display on either side of the cdi on the ils localiser cockpit display what does each of the dots represent approximately ?

0 5 degrees

Admin .five dot display on either side course deviation indicator cdi . 2567 exemple 384 0.5 degrees.

Question 192-25 : Outer marker transmits on 75 mhz and has an aural frequency of ?

400 hz

exemple 388 400 hz.

Question 192-26 : 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 ?

Nw

Admin . 1672.for training purpose .luizmonteiro learning vor exemple 392 Nw.

Question 192-27 : 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

. 1712 exemple 396 10° or more.

Question 192-28 : In accordance with doc 8168 a pilot flying an ndb approach must achieve a tracking accuracy within of the published approach track ?

+/ 5°

exemple 400 +/-5°.

Question 192-29 : What approximate rate of descent is required in order to maintain a 3° glidepath at a groundspeed of 90 kt ?

450 ft/min

.3° glide > 5% rate of descent.divide speed by 2 add a zero exemple 404 450 ft/min.

Question 192-30 : Which statement below concerning mountain effect is correct ?

It may occur on ndb and vor bearings

Admin .mountain effect or terrain effect scalloping due to reflections and multipath propagation of the radio wave radials can be bent and lead to wrong or fluctuating indications exemple 408 It may occur on ndb and vor bearings.

Question 192-31 : Which one of the following is an advantage of a microwave landing system mls compared with an instrument landing system ils ?

It is insensitive to geographical site and can be installed at sites where it is not possible to use an ils

exemple 412 It is insensitive to geographical site and can be installed at sites where it is not possible to use an ils.

Question 192-32 : The azimuth transmitter of a microwave landing system mls provides a fan shaped horizontal approach zone which is usually ?

+ or 40° of the runway centre line

. /com en/com062 85 jpg. exemple 416 + or - 40° of the runway centre-line.

Question 192-33 : Which of the following statements concerning the variable or directional signal of a conventional vor is correct ?

The rotation of the variable signal at a rate of 30 times per second gives it the characteristics of a 30 hz amplitude modulation

Admin .the vor encodes azimuth direction from the station as the phase relationship of a reference and a variable signal .the omni directional signal contains a modulated continuous wave mcw 7 wpm morse code station identifier and usually contains an amplitude modulated am voice channel the conventional 30 hz reference signal is on a 9960 hz frequency modulated fm subcarrier the variable amplitude modulated am signal is conventionally derived from the lighthouse like rotation of a directional antenna array 30 times per second exemple 420 The rotation of the variable signal at a rate of 30 times per second gives it the characteristics of a 30 hz amplitude modulation.

Question 192-34 : The maximum theoretical range at which an aircraft at fl230 may receive signals from a vor facility sited at mean sea level is ?

187 nm

Admin .1 23 or 1 25 depending on your school x sqrt23000 = 190 nm . sqrt square root exemple 424 187 nm.

Question 192-35 : When the fading damping of a radio wave is so important that no signal can be received this phenomenon is ?

Absorption

Admin .absorption of radio wave energy is the way in which the energy is taken up by the ground or atmosphere rain hail ionosphere etc the electromagnetic energy is then transformed to other forms of energy for example into heat exemple 428 Absorption.

Question 192-36 : Where in relation to the runway is the ils localiser transmitting aerial normally situated ?

On the non approach end of the runway about 300 m from the runway on the extended centreline

Admin . 2568. 2569. 2570 exemple 432 On the non-approach end of the runway about 300 m from the runway on the extended centreline.

Question 192-37 : There are two ndbs one 20 nm inland and the other 50 nm inland from the coast .assuming that the error caused by coastal refraction is the same for both propagations the extent of the error in a position line plotted by an aircraft that is over water ?

Greater from the beacon that is 50 nm inland

Admin . coastal refraction low frequency radio waves will refract or bend near a shoreline especially if they are close to parallel to it . terrain effect high terrain like mountains and cliffs can reflect radio waves giving erroneous readings .so the extent of the error is greater from the beacon that is 50 nm inland exemple 436 Greater from the beacon that is 50 nm inland.

Question 192-38 : Which of the following is the icao allocated frequency band for adf receivers ?

190 1750 khz

.ndbs used for aviation are standardised by icao annex 10 which specifies that ndbs be operated on a frequency between 190 khz and 1750 khz exemple 440 190 - 1750 khz.

Question 192-39 : Icao specifications are that range errors indicated by distance measuring equipment narrow dme n should not exceed ?

+ or 0 25 nm plus 1 25% of the distance measured

Admin .the error of the dme 'n' according to annex 10 should not exceed + 0 25 nm + 1 25% of the distance measured for installations installed after 1 jan 1989 the total system error should not exceed 0 2 nm dme 'p' precise exemple 444 + or - 0.25 nm plus 1.25% of the distance measured.

Question 192-40 : In order to obtain an adf bearing on a system using sense and loop aerials the ?

Signal must be received by both the sense and loop aerials

Admin .the aircraft equipment consists of two antennas the adf receiver and the adf instrument .the two antennas are called the loop antenna and the sense antenna .the loop antenna can sense the direction of the signal from the station but cannot discriminate whether the station is in front or behind the aircraft the sense antenna can discriminate direction and solves the ambiguity of the loop antenna exemple 448 Signal must be received by both the sense and loop aerials.


~

Exclusive rights reserved. Reproduction prohibited under penalty of prosecution.

7639 Free Training Exam