DGCA -ATPL - Oral -QBank

[stiknruddr]

Diversion/ Enroute alternate airport means an airport at which an aircraft may land if a landing at
the intended airport is inadvisable. The aerodrome will be available and equipped with
necessary ancillary services such as ATC, sufficient lighting, communications, weather
reporting, navigation aids, emergency services etc.

(from DGCA CAR on etops)

For the ILS question the answer is cat 3

[livetokill22]

Doesn't the dispatch minimums for alternate depend upon the number of useable approaches available. ?


2 precision app. Ceiling 400' viz 1mile
1 precision app. Ceiling 600' viz 2miles
1 npa. ceiling 800' viz 2miles

[stiknruddr]

@livetokill
i have posted etops alternate requirements, not operating minima. i beleieve that was what was asked.

as far as ur doubt on alternate minima for ifr flt planning/dispatch, the figures u quote are applied in FAA/TC and are not icao procedure.
india doesnt actually specify alternate minima for airports. they specify aerodrome operating minima for each airport and i beleive the same are used for alternate planning. but im not 100% sure of the last bit. will try and confirm this with a professional dispatcher in one of the major airlines.

Now, coming to viva questions, sorry i have been a bit lazy.
had my vivas on 7th but posting the Qs now.

NAV
1. what is true north, magnetic north, compass north. diff b/w them all
2. define latt, long? what is prime meridian ?what is time zone?
3. which is more accurate dme-dme fix or gps fix?
4. explain rvsm. what is it? why is is needed? what are the eqpt reqd? below 290 is 1000 seperation, above 290 also 1000 ft, then why is it reduced, it is same..explain!
5. what is etops, explain in ur own words whatever u know abt it. categories?
6. explain canpa/cdfa in ur own words. how is it diff from normal non prec. approach?
7. define msa. show it in approach chart (he opens a random approach plate in the jeppesen binder lying in front of him). where is the highest obstacle in this approach chart?
8. tell me abt mora. which chart is it found on (enroute). what does it mean in terms of clearance.

RADIO AIDS
1. explain working of ndb. show me with diagrams. name all the errors. explain night effect error. explain whats happening inside the device at the loop antenna during night error. within what dist from ndb can night error be ignored?
2. explain ils. what are the antennas used. where are they located on the ground? where is the dme antenna placed if its ILS/DME installation. explain false glide slope. why does it happen. how do u avoid it? how will u know when flying ils approach if u r on false glide slope.
3. explain radar basic theory. types of radar (primary/secondary). example of primary (i said AWR). explain working and modes of awr. what is the frequency used? why? what are types of beams used? why? what is gain?

[Sunny Raja]

oral question at chennai

NAV

1. explain 1 in 60 rule, how will u apply it to get cross wind component on finals.
2. what projetion does jeppesen use? how many std parallels? where are they depicted on the chart?
3. What all types of boundaries are shown on the charts? symbols for these boundaries?Grid MORA- how is it calculated?
4. RNAV and RNP, definition and diffrence. RVSM contingency procedures. HOW much difference betn capt and co-pilot altimeter is permitted to continue rvsm? why rvsm?
5. Mass and Balance - what is BOW, its significance? what is MTOW, its significance?
6. whats CANPA? diff betn DA and MDA? whats DDA? why 50 ft is added, why not 60 or 40 ft? is it same for all ac, for lighter ac it should be less?

RADIO AIDS

1. whats duct propogation? which freq band?
2. Night effect of ndb - explain? how much range reduction takes place due to this?
3. INS-principle. Gyros -explain wander
4. SELCAL -explain
5. Auto-pilot principle of operation!!!
6. whats yaw damper?!!!
7. SSB? why is it required?
8. whats amplitude and freq modulation? Give some examples of where is it used?
9. diff betn VOR and DVOR? why is it called doppler? how is freq modulation used in DVOR?
10. why is machmeter preferred over TAS in high level navigation?
11. what SSR? diff betn mode a, c and s?
12. ASI errors, effect of diff blockages.

[Skyblade]

ATPL NAV and Radio Orals Chennai April 2013 attempt

First of all they ask is tell us about urself? what have u done? if employed? where? etc. On the basis of this they decide which questions to ask. For a fresher they will mostly stick to theoretical questions from the book whereas for an experienced candidate, questions can range from basics to practical aspects of flying(eg one A320 pilot got asked where is the location of ELT in the cockpit?)

Next question which they seemed to be asking a lot of candidates is..Where is the syllabus for ATPL oral exam? (I said CAR..)


General Nav
1) Field limited TOW?
2)Climb limited TOW?
3)What is Climb gradient?
4) If flaps are used how would it affect the TOW?
He then got into enroute charts..Highlighted an area and told me to explain everything i could see in that area
5)definitions-Mea, Moca, Grid Mora
6)Can Moca be less than Grid Mora? (Yes because Moca is only for the width of the airway whereas Grid Mora is for the entire Grid)
7)Show RNAV waypoints, compulsory reporting points, flyover waypoints
8)Explain the difference between Lambert Conformal Conical Chart and Mercator Cylindrical Projection Chart?
9)What is constant of cone? why is it used and what is its significance?
10)In lamberts if scale reduces between std parallels and is least at the parallel of origin then why do we still use it?
11)You are the captain. You are doing an ETOPS flight. What will be your action if the weather at the alternate falls below the ETOPS minima?
case 1- You are just about to enter the ETOPS segment
case 2- You are in ETOPS segment
12) What is adequate aerodrome and suitable aerodrome?which is better?why?


Radio Aids and instruments
1)How is IRS different from INS?
2)What is ring laser gyro? Draw and explain.
3)What are the errors of artificial horizon? Which type of gyro is it
4)Which type of gyro is directional gyro?
5)ASI blockage readings in climb and descent?
6)Altimeter blockage readings in climb and descent?
7)Whats the relation between frequency and wavelength?
8)What happens to speed of light as we go up? (Remains constant)
9)What happens to speed of sound as we go up?
10)Which instrument gets affected because of this?
11)If Mach no is ratio of TAS/LSS then why doesnt it get affected?
12)In LSS=38.94*sq.rt (T in degree kelvin) why is T expressed in degrees kelvin?
13)Which component gets affected more due to low temp at high altitudes static pressure or dynamic pressure?
14)Explain the working of VOR? its limitations?
15)What is DVOR? how does it remove site error?
16)What is TCAS 2? what indications does it give?
17)What do you tell the ATC when you receive TCAS RA?
18)On what instrument do you get TCAS indications?
19)Tell me another SSR instrument onboard the aircraft? (ans. DME)
20)What are the errors of DME?
21)Which type of propagation does it use? Range given by which formula?
22) Overhead the beacon what range information will DME give?
23)Which instrument gets affected because of skywaves?How does it affect?
24)At night coverage of NDB increases or decreases? till what range? (ans. decreases. we can use it till 70nm)
25)What is Mcrit?
26)Why is Mach no used after a certain level in climb?
27)Can we determine at what altitude will the coffins corner be by looking at IAS?

[Skyblade]

ATPL Nav Orals Mumbai July 2013 attempt

hi everyone,
I had cleared my radio aids & instrument oral in april 2013 attempt but couldn't make it in nav.


The following questions were asked to me this time:-
1) What is latitude, longitude, rhumb line?
2) What is earth's compression?
3) What is orthomorphism?
4) What is convergency?formula?
5) Tell me everything you know about mercator and lambert projection? (explain everything construction, properties, shapes of rhumb line, G.C., scale variation etc)
6) What is transverse and oblique mercator?
7) What is GPS?
8) There was a VOR approach plate, was asked to brief him the approach.
What is the MSA, FAF?
MSA was 2600', he asked if coming inbound ATC clears you to descend to 2600' at 26nm would you descend?(I said yes i would descend as i am coming inbound i will enter the msa shortly. I dont know if its correct because technically msa clears obstacles uptill 25nm only )
Tell me the missed approach procedure of this approach.
9) He took an enroute chart and asked me to locate a particular location (jodhpur) in the chart? (ans. locate it by opening the page where the page nos are written across the location name, eg. jodhpur pg7c etc they want to see you do this)
And what are the standard parallels of this chart?

Thats it, you can go now

My last attempt at nav orals was pathetic, but this time it was good, hopefully, i will clear this time.

Thanks for reading.

[Johny Boy]

Skyblade

Fantastic and you have good memory to recollect questions

[Halfwayback]

TXT SPK

Please take note that text speak (TXT SPK) is not tolerated on PPRune so please make your posts clearly in English otherwise they will continue to be deleted.

Many thanks in anticipation

Halfwayback
Moderator

[RNP5]

ATPL viva questions July 2013

1) What is balanced field length? TODR=ASDR
2) What are the factors affecting TODR?
3) What is the MTOW for your aircraft?
4) For B737-800 and for A330, the TODR will remain the same or it is different?
5) What are the checks u do before entering EEP?
6) Why APU is mandatory? Is it a legal requirement?
7) What it does?
8) what procedure you follow in case of turbulence?
9) When you disconnect the thrust, what happens?
10) Does the MN is maintained? Or it keep changing?
11) why it is important to maintain the MN at a high altitude and not IAS?
12) what happens in case of IAS going up n down? What r ur actions?
13) what is ADC? From where does it gets input from? And where does the output go?
14) explain IRS?
15) MNPS airspace flying what RNP?
16) equipment a required for flying into MNPS airspace?
17) what is MN technic? Do we use in domestic airspace?
18) explain ILS glide path? How it works? explain how the a/c maintain the glide?
19) where is glide path located?
20) your a/c is approved for ht ILS category?
21) state ILS minima? For your a/c?
22) where you'll. find the minima for your a/c?
23) where will you find the ILS minima? Which document you'll look for?
23) what is CAR? How many sections are there?
24) If ILS fails what indication you will get?
25) what projections your enroute chart uses?
26) state important properties of enroute chart?
27) what do you mean by orthomorphic chart?
28) what is the upper limit of Lambert chart?
29) what is back course approach?
30) is your aircraft is approved for B/C?
31) what is special operations?

I could answer many of them, just hoping for the best results!!!

[srini19t]

DGCA CHENNAI ATPL VIVA

Dear ATPL ASPIRANTS

ALL THOSE APPEARING FOR ATPL NAV VIVA IN CHENNAI IN JAN 14 PLEASE POST THE QUESTIONS.
MY VIVA IS ON 22 jan. I SHALL POST MINE ON 22 jan
Let's make it together

[MZS]

RADIO AIDS ORAL

Questions asked on 24th Jan at Delhi

1.GPS PRINCIPLE OPERATION & ERROR
2. ALTIMETER
3.GPWS EGPWS
4. VOR/DOPPLER VOR GPS SECONDARY NAV AID

[aeroshooter]

ATPL VIVA April (June ) 14

Guys...appearing for ATPL Nav oral on 20th June 14. Please update questions from this attempt.

Thanks!!!

[critmach]

ATPL VIVA JUNE 2014, MAA

Hi all,
I appeared for Nav & Radio orals together on 16th June 2014 at MAA,answered almost 70% but failed both.

Here are the questions.
-errors of NDB,
- most sig error in DME
- diff between CVOR & DVOR
- define RVSM,what are the contingencies
- equipments needed for RVSM
- what is SLOP
- what is etops
- define etops entry point
- what is the diff between RNP1. & RNP 10
- what is improved climb?
- what are the departure segments
- define lda & balanced field length
- effect of take off roll in a sloped rwy.
- height of screen height for wet rwy
- lvto
- diff between IRS & INS
- how is aligning done
- what happens if wrong lat/long are put while aligning
-

[critmach]

ATPL VIVA AUG-SEPT 2014

Hello ATPL Aspirants!
Requesting all those appearing for ATPL VIVA at chennai (Aug-Sept 2014) to take the time & post questions asked in the viva as soon as possible.We all know how important it is to all of us.Good luck to all of us.
Happy landings.

[Flying738ng]

viva question

hello
was asked the following questions in del 08/09/14 (nav)
1. what cg position is better forward or aft
2. explain abt ALD, LDR.
3. explain convergency angle,
4. explaing rnp, rnav
5. wht is rnp 5
6. what are Q routes (ex mum-del)

[Flying738ng]

Oral results

Atpl oral results out July session 2014

[Flying738ng]

Rnav circulars

There are new circulars on rnav on dgca website

[mackerz89]

Question bank

Does anybody know, where i could find a Question and Answer bank for the DGCA?

[avl998]

hey

guys just had my orals for the october attempt was giving radio and gen nav some of the questions that i could recollect are:-

RADIO
2)YOU HAVE A ENGINE FAILURE IN A 737 AFTER THAT U HAVE A RA ON YOUR TCAS ASKING YOU TO CLIMB, WHAT WILL BE YOUR NEXT ACTION?

I had told them that if aircraft in normal conditions i would have answered the above question but engine failure dont know sir , so then the answer they gave was U CHANGE YOUR AIRCRAFT MODE TO TA FROM RA THEN IT ONLY TELLS YOU "TRAFFIC TRAFFIC" AND FOR THE INTRUDER AIRCRAFT IT NOW KNOWS THAT U R NOT FOLLOWING YOUR RA ANYMORE AND HIS RA WILL COORDINATE WITH MY AIRCRAFT ACCORDINGLY...PHEW..

3)HOW DO YOU REDUCE ISO CLUTTER I AN AWR IN A MODERN AIRCRAFT ?
again didnt know much about it except its to do something with the swept gain , anyway so the answer to this is THERE IS A BUTTON THE PANEL WHICH SAYS GCS GROUND CLUTTER SUPRRESS.

4)WHAT IS SELCALL?
THIS ONE I BELIEVE MOST OF US HERE CAN ANSWER.

5)WHAT IS ELT406?
EMERGENCY LOCATOR TRANSMITTER BEACON TRANSMITTS ON 406MHZ FREQUNCY FOR SEARCH AND RESCUE OPERATIONS.

6)WHAT IS THE DIFFERENCE BETWEEN EGPWS AND GPWS TELL US ALL THE ALERTS , MODES AND WARNINGS ?
THIS IS A DIRECT QUESTION ITS DERE IN GSP AND OXFORD BOOKS ALSO REMEMBER TO TALK ABOUT MODE 7 WHICH GIVES REACTIVE WINDSHEAR.

7)DO YOU GET A PICTURE ON YOUR AWR RADAR SCREEN OF A WINDSHEAR?
I TOLD THEM WE GET AUDIO AND VISUAL ALERTS BUT NOT SURE OF A PICTURE ON THE AWR SCREEN.

8)ON GROUND CAN YOU SWITCH ON YOUR TCAS WHILE TAXING AND WHAT DOES IT GIVE TA OR RA?
I TOLD THEM NOT SURE SIR ABOUT SWITCHING IT ON GROUND , THE ANSWER IS YOU CAN SWITCH IT ON AND YOU GET ONLY TA.

THATS IT GUYS ALL THIS LASTED FOR ABT 10-15 MINS STUDY DEEP, IF YOU KNOW YOUR STUFF WELL THEY WILL CLEAR YOU. ALL THE BEST.

[spashalist17]

dgca atpl

hi guys no ones posted any questions of latest viva on 9 mar 15