Procedures for Air Navigation Services Aircraft OperationsAir Regulations — DGCA CPL practice questions

Question 1 of 61

A horizontal red square panel with one yellow diagonal means:

A.Do not land for the time being

B.Landings Prohibited

C.Aircraft are to land Take off & Taxi on runways and taxi ways only

D.Special precaution while landing should be taken because of the bad state of the Maneuvering area

All 61 questions — Procedures for Air Navigation Services Aircraft Operations

Air Regulations · DGCA CPL. The correct option is marked on each.

Q1. A horizontal red square panel with one yellow diagonal means:
- A.Do not land for the time being
- B.Landings Prohibited
- C.Aircraft are to land Take off & Taxi on runways and taxi ways only
- D.Special precaution while landing should be taken because of the bad state of the Maneuvering area✓
Why: Count the diagonals — that is the whole question. ONE yellow diagonal on a red square panel means special precautions must be observed when approaching to land or landing, because of the bad state of the manoeuvring area or for some other reason. You may still land; you must be careful. TWO yellow diagonals on the same red panel is the harder signal: landings are prohibited, and the prohibition is likely to be prolonged. Reference: ICAO Annex 2, Appendix 1, 4.2.2
Q2. Runaway direction is measured from:
- A.True North
- B.Compass North
- C.Magnetic North✓
- D.North Pole
Q3. What is the definition of MEA?
- A.The lowest published altitude, which meets obstacle clearance requirements and assures acceptable navigational signal coverage.✓
- B.Lowest published altitude, which meets obstacle requirements assures acceptable navigational signal coverage, two - way radio communications, and provides adequate radar coverage.
- C.An altitude, which meets obstacle clearance
- D.An altitude, which ensures minimum 1000’ clearance from all obstacles
Q4. A continuous red beam directed at an aircraft from the ATC tower means :
- A.Airfield unserviceable, land elsewhere
- B.Airfield closed, do not land
- C.Do not land, give way to other aircraft and continue circling✓
- D.Clear the landing area
Why: Every light signal means one thing to an aircraft in flight and a different thing to one on the ground — that is the first hurdle in this table, and most wrong answers come from mixing the two columns. A steady red to an aircraft in flight means give way to other aircraft and continue circling. To an aircraft on the ground the same steady red simply means stop. Note what it does NOT mean: the aerodrome is not closed and not unserviceable — you are being sequenced, not turned away. Reference: ICAO Annex 2, Appendix 1, 4.1.1
Q5. A series of red and green projectiles fired at an interval of 10 sec means
- A.aircraft is flying over danger area
- B.aircraft is flying over prohibited area
- C.Aircraft is flying over restricted area
- D.All of the above are correct✓
Why: This is not an aerodrome signal at all — it is a warning to an unauthorised aircraft. Projectiles discharged from the ground at ten-second intervals, each bursting to show red and green lights or stars, tell you that you are flying in, or are about to enter, a restricted, prohibited or danger area, and that you must take whatever remedial action is needed. The signal does not distinguish between the three kinds of airspace, which is exactly why all three options are correct. Reference: ICAO Annex 2, Appendix 1, 3
Q6. Decision Altitude is applicable for:
- A.Non Precision Approaches
- B.PAPI Approaches
- C.Precision Approaches✓
- D.All of the above
Q7. OCA is used for determination of:
- A.MDA
- B.DA
- C.Both MDA and DA✓
- D.None of the above
Q8. What lights will a pilot see from the PAPI system if he is slightly low on the instrument approach glide slope? Inboard means closer to the runway.
- A.3 white lights inboard of 1 red light
- B.3 red lights inboard of 1 white light✓
- C.1 white light inboard of 1 red light
- D.1red lights inboard of 3 white lights
Q9. Minimum obstacle clearance in mountainous terrain for an IFR light is
- A.1000’ in 5kms
- B.2000’ in 8 kms✓
- C.2000’ in 5kms
- D.1500’
Q10. A prohibited area means an area over which:
- A.Flight within 2 miles is prohibited.
- B.Flight of aircraft is totally prohibited.✓
- C.Low flying is prohibited.
- D.Only instrument flying practice can be done.
Q11. A series of red flashes sent to an aircraft in flight means :
- A.Aerodrome unsafe, do not land✓
- B.Return to the airfield and land
- C.Give way to another aircraft and remain in the circuit
- D.Notwithstanding any other instructions do not land at the moment
Why: Red flashes in flight mean the aerodrome is unsafe — do not land. Hold the pair together so you can never confuse them: steady red is about other traffic and you keep circling; flashing red is about the aerodrome itself and you do not land at all. On the ground, the same series of red flashes means taxi clear of the landing area in use. Reference: ICAO Annex 2, Appendix 1, 4.1.1
Q12. A public transport aircraft shall not take-off unless the following minima for the departure airfield are satisfactory :
- A.Cloud base and visibility
- B.Cloud ceiling and RVR✓
- C.Cloud base and RVR
- D.MDH and RVR
Q13. Series of Red flashes from control tower when aircraft is in flight means:
- A.Aerodrome is closed
- B.Aerodrome is unsafe, do not land✓
- C.Give way to other aircraft and continue circling.
- D.Disregard previous instruments; do not land for the time being.
Why: Red flashes in flight mean the aerodrome is unsafe — do not land. Hold the pair together so you can never confuse them: steady red is about other traffic and you keep circling; flashing red is about the aerodrome itself and you do not land at all. On the ground, the same series of red flashes means taxi clear of the landing area in use. Reference: ICAO Annex 2, Appendix 1, 4.1.1
Q14. A flashing white light directed at an aircraft on the maneuvering area of an airport means
- A.Stop
- B.Return to starting point on the airport.✓
- C.Cleared to taxi.
- D.Taxi clears of landing area in use.
Why: The question specifies an aircraft on the manoeuvring area, so read the ground column: a series of white flashes means return to your starting point on the aerodrome. To an aircraft in flight the same signal means something quite different — land at this aerodrome and proceed to the apron. White is the only signal colour whose two meanings are not obviously related, so it is worth learning as a pair. Reference: ICAO Annex 2, Appendix 1, 4.1.1
Q15. Min. width of runway centre line stripes for Cat I runways is:
- A.0.3mts
- B.0.6mts
- C.0.45mts✓
- D.0.9mts
Q16. A horizontal white dumbbell displayed in signal area means:
- A.Pilot to exercise caution due bad state of the maneuvering area.
- B.Aircraft are required to land, take off and taxi on runway and taxiways only.✓
- C.Aircraft are required to land/take off on runway only but may use grass area for taxing.
- D.Aerodrome closed.
Why: A plain white dumb-bell in the signal area means aircraft must land, take off AND taxi on runways and taxiways only — nothing on the grass. Learn its variant alongside it: the same dumb-bell with a black bar across each circular end relaxes the taxi requirement, so landings and take-offs stay on runways but other manoeuvres need not be confined to runways and taxiways. Reference: ICAO Annex 2, Appendix 1, 4.2.3.1
Q17. An alternate aerodrome means:
- A.An aerodrome specified in the flight plan t o which a flight may proceed when it becomes in advisable to land at the aerodrome of intended landing.✓
- B.Any aerodrome other than the aerodrome of intended landing which may be used by an aircraft.
- C.An aerodrome where an aircraft may be forced to land due to unavoidable circumstances.
- D.An aerodrome situated at the same location other than the aerodrome of intended landing.
Q18. RVR for a runway filed by an operator is 500m. Threshold RVR is reported to be 800 m. It is:
- A.above filed minima✓
- B.below filed minima
- C.with in minima if mid RVR is above 450m
- D.with in minima if both mid RVR and stop end RVR are above 500m.
Q19. HAT for Precision approaches Cat II is:
- A.Nil
- B.50’✓
- C.100’
- D.200’
Q20. Weather below minima implies that:
- A.RVR/ Visibility and weather below minima specified by the operator✓
- B.Weather below V M C
- C.RVR / and weather below minima specified by / ICAO
- D.Cloud ceiling is below 1500’ above the aerodrome
Q21. Decision altitude is related to:
- A.Precision app✓
- B.Non precision app
- C.Circling app
- D.both ‘a’& ’b’
Q22. Circling minimas are:
- A.Higher than precision app minimas✓
- B.lower than precision app minimas
- C.Same as than precision app minimas
- D.may be more or less than Precision app. Minimas
Q23. White flashes from tower to aircraft in flight means:
- A.Return to this aerodrome and proceed apron
- B.Land at this aerodrome and proceed to apron.✓
- C.Land after green signal from Tower.
- D.None of the alone
Q24. OCA is determined after taking into account margin for:
- A.Terrine clearance✓
- B.Pilot error
- C.Operational congregations
- D.Weather considerations.
Q25. RVR/DH for cat II ILS ops is:
- A.550m/60
- B.350m/30m✓
- C.550m/30m
- D.800m/60m
Q26. RVR/DH minima cat III A MLS is:
- A.200m/Nil✓
- B.50m/nil
- C.nil/nil
- D.Non of the alone
Q27. Advance notification for establishment of a VOR at an airport shall be notified by means of
- A.AIRAC✓
- B.AIP
- C.NOTAM
- D.AIC
Q28. SIDs are used for:
- A.IFR departures at busy aerodromes✓
- B.VFR flights only
- C.For all aerodrome traffic
- D.For all arriving aircraft
Q29. In Cat II ILS approach, what is DH & RVR?
- A.100’ and upto 1500’
- B.Below 200’ and 550m
- C.200’ and upto 350m
- D.100’ & upto 350m✓
Q30. What does a white dumbbell in the signal area mean?
- A.Landing prohibited
- B.Take-offs, landings and taxiing must be made on paved surface only
- C.Take-offs and landings must be made on paved surfaces, taxiing may be on grass
- D.Make all take-offs, landings and taxiing on runways & taxiways only.✓
Why: A plain white dumb-bell in the signal area means aircraft must land, take off AND taxi on runways and taxiways only — nothing on the grass. Learn its variant alongside it: the same dumb-bell with a black bar across each circular end relaxes the taxi requirement, so landings and take-offs stay on runways but other manoeuvres need not be confined to runways and taxiways. Reference: ICAO Annex 2, Appendix 1, 4.2.3.1
Q31. In the signals area there is a red square with a yellow diagonal. What does this mean?
- A.The traffic pattern is right hand
- B.All turns after take-offs and landings must be to the right
- C.Landing prohibited
- D.Take special care during approach and landing✓
Q32. IFR flight shall not be commenced if the weather at destination and alternate is
- A.Above minima
- B.CAVOK
- C.below minima✓
- D.IMC prevails
Q33. Runway direction is measured from
- A.True North
- B.Compass North
- C.Magnetic North✓
- D.North Pole
Q34. If pilot sees 2.5 meter symbol “V” on the ground, what does it mean?
- A.A survivor requires medical assistance
- B.The survivors
- C.A survivor requires general assistance✓
- D.Negative
Q35. En-route Altitude will be determined for each stage of the route by taking 1000 ft of Terrain clearance with in a width of:
- A.5 Nms
- B.10kms
- C.15Nms
- D.20 Nms✓
Q36. Take off Alternate Aerodrome shall be located from the Aerodrome of departure not more than a distance equal to the Flt of______ with one engine inoperative cruise speed.
- A.1 hr for 2 Eng A/c and 2 hrs or more for 3 Eng or more than 3 Eng A/c✓
- B.30 minutes for 2 Eng A/c and one hrs for more than 3 Eng A/c
- C.2 hrs for 2 Eng A/c and 3 hr for 3 or more Eng A/c
- D.2 hrs for 2 Eng A/c & 1 hr for 3 or more engine A/c
Q37. In a precision approach, minimum height below which p-i-c cannot descend unless visual reference to land is established
- A.DA
- B.DH✓
- C.MDA
- D.MDH
Q38. In a non-precision approach, min height below which p-i-c may not descend is:
- A.DA
- B.DH
- C.MDA
- D.MDH✓
Q39. OCA is calculated for
- A.Precision approaches
- B.Non-precision approaches
- C.Both a & b✓
- D.None of the above
Q40. ILS glide slope angle normally is set at :
- A.2.5 º
- B.3.0 º✓
- C.3.5 º
- D.4.0 º
Q41. An instrument runway served by ILS & visual aids intended for operations with a DH not lower than 60m and RVR not less than 550m is a
- A.Cat I runway✓
- B.Cat II runway
- C.Cat III runway
- D.Non-precision approach runway
Q42. Airfield safety altitude:
- A.Is highest sector safety altitude with in 25NMs✓
- B.Is highest sector safety altitude with in 10NMs
- C.Provides clearance from obstructions with in 50NMs of aerodrome
- D.None of the above
Q43. Fuel to be carried by a Turbo-jet aircraft when destination alternate is required is to fly to destination aerodrome execute an approach and MA and thereafter:
- A.To fly to alternate +45 mts at holding speed at 1500’
- B.To fly to alternate +30mts at 1500’ make an approach and land✓
- C.To fly to alternate via pre determined point + 45 mins at 1500’
- D.To fly to alternate + fly for 60 mts at 1500’.
Q44. MDA is calculated for:
- A.Precision approaches
- B.non-precision approach &
- C.Circling approaches
- D.both✓
Q45. ETOPS stands for
- A.Extra Time Operations
- B.Extended Turbojet Operations
- C.Extend true engine operation
- D.Extended-range Twin-engine Operations✓
Q46. Flight manual contains:
- A.Fuel and oil to be carried on board
- B.Certificate of air worthiness
- C.Route Navigation guidance
- D.Information and instruction to save operations✓
Q47. OCA is Associated with:
- A.Precision Approaches
- B.Circling approaches
- C.Ht. calculated to ensure terrain clearance
- D.All of the above✓
Q48. OCA circling approach is __________ the OCA precision approach:
- A.Lower than
- B.Higher than✓
- C.Equal to
- D.None of the above
Q49. If an aerodrome minima is not established for IFR/VFR operations the minima to be applied will be laid down by:
- A.AAI
- B.DGCA✓
- C.Operator
- D.ICAO
Q50. Series of red and green projection fired at an interval of 10 sees means:
- A.Do not land for the time being
- B.Exercise caution while landing
- C.Keep away from danger area✓
- D.Keep circling
Q51. In Cat II, What is DH & RVR?
- A.100’ and upto 1500’
- B.Below 200’ and 550m
- C.200’ and upto 350m
- D.100’ & upto 350m✓
Q52. The operating minima for an aerodrome are expressed in terms of
- A.RVR
- B.RVR or visibility and MDA / H
- C.RVR or visibility and if necessary cloud conditions
- D.All above✓
Q53. In a non precision approach, the minimum height that the pilot can descend to is given by
- A.DA
- B.DH
- C.MDA
- D.MDH✓
Q54. Pilot in command of an aircraft on precision approach cannot execute a landing unless he has the runway visual references in contact before he can descend below
- A.MSA
- B.MDH
- C.DA✓
- D.MDA
Q55. Aeronautical information circulars provide information that:
- A.Timely knowledge of services, procedure or hazard which is essential to personnel concerned with flight operations
- B.Does not qualify as a NOTAM or an inclusion in AIP, but relates to flight safety, air navigation, administrative or legislative matters.✓
- C.Temporary changes to the information contained in the AIP which are published by means of special pages.
Q56. Filed minima 500m, RVR beginning 800m, RVR mid 300m.Aerodrome is:
- A.Below minima
- B.At par with minima
- C.Above minima✓
- D.Will depend on trend forecast.
Q57. Cat II ILS approach
- A.Decision height not lower than 60 m (200 ft) and with either a visibility not less than 800m or a runway visual range not less than 550 m.
- B.Decision height lower than 60 m (200 ft), but not lower than 30 m (100ft), and a runway visual range not less than 350 m.✓
- C.A decision height lower than 30 m (100 ft) or no decision height; and
- D.Used in establishing compliance with appropriate obstacle clearance criteria.
Q58. Instrument flying time means:
- A.Flying simulator
- B.Flying in IMC
- C.Flying a/c with sole reference to instruments✓
Q59. Straight out departure is:
- A.10 degree
- B.15 degree✓
- C.30 degree
- D.45 degrees
Q60. The take off alternate aerodrome shall be located from the aerodrome of departure, not more than a distance equivalent to a flight time of:
- A.One hour for a two engine aero plane and 2 hour for 3 or more engines aero plane.✓
- B.30 minutes for a two engine aero plane and 1 hour for 3 or more engines aero plane.
- C.Two hour for a 2 engine aero plane and 3 hour for 3 or more engines aero plane.
- D.Two hour for a two engine aero plane and 1 hour for 3 or more engines aero plane
Q61. Enroute altitude will be determined for each stage of the route by taking 1000 ft terrain clearance within:
- A.5 nm
- B.10 km
- C.15 nm
- D.20 nm✓