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Airport Planning and Design – IES PYQ

      

1. Maximum gross take-off weight of an aircraft is _____ .

[IES 1997]

  1. Less than the maximum structural landing weight
  2. More than the maximum structural landing weight
  3. Equal to the empty operating weight plus the payload
  4. Equal to the maximum structural landing weight
Answer: Option B
Explanation:
Maximum gross take-off weight of an aircraft is more than the maximum structural landing weight due to the burning of fuel during a flight, resulting in reduced weight of the aircraft.

2.  Castor angle is defined as the angle _____ .

[IES 1998]

  1. Between the direction of wind and the longitudinal axis of the runway.
  2. Between the true speed of the aircraft and the crosswind component.
  3. Between the horizontal and the fuselage axis.
  4. Formed by the longitudinal axis of the aircraft and the direction of movement of the nose gear.
Answer: Option D
Explanation:
Castor angle is the angle between the longitudinal axis of the aircraft and the direction of movement of the nose gear.

3.  Match List-I with List-II with reference to airport engineering and select the correct answer using the codes given below the lists:

List-I

  1. PNB
  2. LCN
  3. STOL

List-II

  1. Noise level
  2. Visual range
  3. Airport pavement evaluation
  4. Type of aircraft

[IES 2000]

Codes: A B C

  1.  1  4  3
  2.  4 2  1
  3.  2 3  4
  4.  1  3  4
Answer: Option D
Explanation:

  • Perceived Noise level Intensity in Bel (PNB) is a measure of the relative noisiness of an individual aircraft pass-by event.
  • Load Classification Number (LCN) system was developed by the British Air Ministry Directorate of General Works to design the airport pavements.
  • Short Take-Off and Landing (STOL) aircraft is a type of aircraft classified based on the required take-off and landing runway length.

4.  A surface longitudinally centered on the extended runway centre line and extending outward and upward is called _____ .

[IES 1999]

  1. Conical surface
  2. Horizontal surface
  3. Approach surface
  4. Primary surface
Answer: Option C
Explanation:

  • Approach surface is an imaginary surface which is longitudinally centred along the centerline of the runway.
  • It is provided at both ends of the runway extending outwards and upwards. Hence, it is trapezoidal in shape.
  • Approach surface is intended to be used for the landing of airplanes.

5.  In the figure shown below, “cockpit cut-off angle” is the angle labelled _____ .

[IES 2001]

  1. β 
  2. φ
  3. θ
  4. α
Answer: Option D
Explanation:
Cockpit cut-off angle is defined as the angle between the longitudinal axis of the aircraft fuselage and an inclined plane below which the pilot cannot view. In the given diagram, α represents cockpit cut-off angle.

6.  Match List-I (Imaginary surface) with List-II (Characteristic) and select the correct answer using the codes given below the lists:

List-I

  1. Conical 
  2. Approach
  3. Primary
  4. Transitional 

List-II

  1. Longitudinally centered on a runway.
  2. Longitudinally centered on the extended runway.
  3. Extending outward and upward from the periphery of the horizontal surface.
  4. Extending outward and upward at right angles to the runway center lines.

[IES 2002]

Codes: A B C D

  1.  4  2  1 3
  2.  3  2  1 4
  3.  4  1  2 3
  4.  3  1  2 4
Answer: Option B
Explanation:

  • Conical surface extends upwards and outwards from the periphery of the inner horizontal surface to the outer horizontal surface.
  • Approach surface is longitudinally centered at both sides of the extended runway. It extends upwards and outwards and thus it is trapezoidal in shape.
  • Primary surface is longitudinally centered on a runway.
  • Transitional surface is a surface along the side of the runway and part of the side of approach surface that slopes upwards and outwards to the inner horizontal surface.

7.  Which one of the following imaginary surface in airport is circular in plan with centre located at an elevation of 150 m above the airport reference point ?

[IES 2003]

  1. Transitional surface
  2. Inner horizontal surface
  3. Outer horizontal surface
  4. Conical surface
Answer: Option C
Explanation:
The height of Outer Horizontal Surface is 150 m above the Airport Reference Point.

8.  Assertion (A): In case of airports, the innermost portion of approach zone, where any obstruction is to be critically viewed, is known as the clear zone.

Reason (R): The area of airport, other than the approach zone, which is used for turning of aircrafts, is called as turning zone.

[IES 2009]

  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 B
Explanation:

  • The innermost portion of the approach zone which is the most critical portion from obstruction view-point is known as clear zone.
  • The area of the airport other than the approach area, which is used for turning operations of aircraft is called turning zone.

9.  Assertion (A): Helipads are usually located in close proximity to traffic-generated areas. 

Reason (R): A helicopter cannot ascend or descend exactly vertically.

[IES 2009]

  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 C
Explanation:
A helicopter can ascend or descend vertically.

10.  Statement (I): The actual payload, particularly in passenger aircraft, is normally less than the maximum structural payload even when the aircraft is completely full. 

Statement (II): There are limitations in the use of space when passengers are carried in an aircraft.

[IES 2013]

  1. Both Statement (I) and Statement (II) are true and Statement (II) is the correct explanation of Statement (I).
  2. Both Statement (I) and Statement (II) are true but Statement (II) is not a correct explanation of Statement (I).
  3. Statement (I) is true but Statement (II) is false. 
  4. Statement (I) is false but Statement (II) is true.
Answer: Option B
Explanation:
Payload is the actual load carried by an aircraft which produces revenue. This includes the weight of passengers, mails, cargo and baggage. Such maximum loads may be considered as individual or combined and designated as the maximum structural payload. The actual payload must always be less than the maximum structural payload.
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