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Air Traffic Control – IES PYQ

      

1. Consider the following four components in an Instrumental Landing System:

  1. Threshold lights
  2. Glide slope antenna 
  3. ‘Z’ markers
  4. Localizer antenna

These components are installed in the direction of landing in the sequence

[IES 2003]

  1. 1-4-3-2
  2. 3-1-2-4
  3. 2-3-4-1
  4. 4-2-3-1
Answer: Option B
Explanation:
The sequence of installation in the direction of landing are:
Outer marker – Middle marker – Threshold lights – Glide slope antenna – Localizer antenna

2.  Assertion (A): Runway capacity will be more in airport operating under VFR than IFR. 

Reason (R): VFR gives more clear visual reference of airport during good weather conditions.

[IES 2008]

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not a correct explanation of A.
  3. A is true but R is false. 
  4. A is false but R is true.
Answer: Option A
Explanation:

  • If Visual Flight Rules (VFR) conditions exist, the air traffic control during the route is practically not required, as the pilots can maintain the desired separation by visual aids. The Instrumental Flight Rules (IFR) conditions exist when the visibility is lower than the limits prescribed for flight under visual flight rules.
  • Under IFR conditions, rigid traffic control is required and hence, the capacity of the runway will be lesser in comparison with the runway operating under VFR.

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