# Airport Capacity and Configuration – IES PYQ

1. In an airport, if 4 groups of 5 gates each located well-separated are considered for traffic and the future-to-present traffic ratio is 3, then the total requirement of future gates will be _____ .

**[IES 1998]**

- 36
- 44
- 68
- 32

**Answer:**Option C

**Explanation:**

Total number of gate positions at present = 4 x 5 = 20

Since, the future-to-present ratio = 3, the number of gates positions required in future = 3 x 20 = 60

Number of gate positions =

60 x 2

x Average gate occupancy time

As the average gate occupancy time can increase in future, only reliable answer is 68 gate positions.

2. Consider the following factors:

- Air traffic control measures
- Aircraft traffic composition
- VFR/IFR operation
- Runway configuration

Which of these factors affect the capacity of a runway ?

**[IES 2002]**

- 2 and 3
- 1 and 4
- 1, 2, 3 and 4
- 1, 2 and 3

**Answer:**Option C

**Explanation:**

The capacity of a runway depends on

- Air traffic control
- Demand characteristics
- Aircraft traffic composition
- Environmental factors like visibility, runway surface conditions, etc.,
- Methods of air traffic control – Visual Flight Rules (VFR) and Instrumental Flight Rules (IFR)
- Layout and design of runway systems

3. Which of the following gives the number of gate positions in an airport ?

**[IES 2005]**

- Capacity of apron 60 x 2x Number of aircraft movements
- Capacity of taxiway 60 x 2x Average gate occupancy time
- Capacity of holding apron 60 x 2x Average gate occupancy time
- Capacity of runway 60 x 2x Average gate occupancy time

**Answer:**Option D

**Explanation:**

Number of gate positions =

60 x 2

x Average gate occupancy time

4. If M_{i} = Proportion of i^{th} type of aircraft in the mix,

T_{i} = “Gate occupancy time” of the i^{th} type of aircraft,

G = Number of gates (considering that all the available gates can be used by all aircrafts)

Which one of the following equations gives the ultimate gate capacity C ?

**[IES 2006]**

- C =G x 60 Σ M
_{i}T_{i} - C = ΣMx T
_{i}G_{i} - C =G Σ M
_{i}x T_{i} - C =Σ G x M
_{i}Σ T_{i}

**Answer:**Option C

**Explanation:**

The capacity of the gate system is given by, C =

Σ M

_{i}x T

_{i}