Engineering Questions with Answers - Multiple Choice Questions

# MCQs on Flight Mechanics – Landing Analysis

1 - Question

Following diagram represents ____________

a) typical landing analysis segments
b) takeoff phase
c) climbing
d) takeoff ground roll

a
Explanation: Above diagram is showing typical landing phase of an aircraft. As shown in the diagram landing phase is subdivided into number of segments such as flare distance, Approach distance etc. Takeoff ground roll is a segment of takeoff phase. Takeoff phase includes ground roll, transition, climb etc

2 - Question

The segment marked by ‘?’ in following diagram is showing _____

a) approach
b) climb
c) takeoff
d) cruise

a
Explanation: The term marked by? Is showing the Approach segment of aircraft landing phase. Climbing phase is used to increase the altitude of the aircraft. Cruise segment has lift equal to weight and Thrust equal to drag. Takeoff phase is different from the landing phase.

3 - Question

The distance shown by ‘?’ in the following diagram is termed as __________

a) flare distance
b) loiter
c) cruise
d) climb

a
Explanation: Above diagram is illustrating typical landing phase of the aircraft. As shown in the diagram flare distance is marked by ‘?’. Aircraft will decelerate from Approach speed to touchdown speed during flare.

4 - Question

Find the approach speed if, stall speed is 12 unit.
a) 15.6 unit
b) 12 unit
c) 10 unit
d) 1 unit

a
Explanation: Approach speed = 1.3* stall speed = 1.3*12 = 15.6 unit.

5 - Question

Find the approach speed for military aircraft. Considered stall speed is 22unit.
a) 26.4 unit
b) 20 m
c) 12 ft
d) 45 unit

a
Explanation: For military aircraft, Approach speed = 1.2*stall speed = 1.2*22 = 26.4 unit.

6 - Question

Find the required amount of touchdown speed if stall speed is 100knots.
a) 115 knot
b) 120 knot
c) 100 knot
d) 99.2 knot

a
Explanation: Touchdown speed = 1.15*stall speed = 1.15*100 = 115 knot.

7 - Question

If stall speed is 120 knots then, find average velocity at flare.
a) 147.6
b) 120
c) 110
d) 567

a
Explanation: Average velocity at Flare = 1.23*stall speed = 1.23*120 = 147.6 knots.

8 - Question

For military aircraft touchdown speed is 100 knots then, approximate value of stall speed.
a) 90.90
b) 100
c) 200
d) 223

a
Explanation: Stall speed = touchdown speed/1.1 = 100/1.1 = 90.90.

9 - Question

Find the required average velocity during flare for military aircraft if stall speed is 45 unit.
a) 51.75 unit
b) 60 unit
c) 45 unit
d) 100 unit

a
Explanation: Average velocity during flare = 1.15*stall speed = 1.15*45 = 51.75 unit.

10 - Question

Determine the value of FAR field length. Consider approach of 100 ft., flare of 120 feet and ground roll of 600ft.
a) 1366.12
b) 109
c) 600
d) 700

a
Explanation: FAR field length = 1.666*(approach + flare + ground roll)
= 1.666*(100 + 120 + 600) = 1366.12.

11 - Question

Which of the following is correct?
a) Aircraft decelerates from Approach to Touchdown speed during flare
b) Lift is always same as weight
c) Drag is always same as Thrust
d) Thrust loading is defined as the ratio of lift to drag

a
Explanation: During flare aircraft will decelerates from Approach speed to touchdown speed. Lift is not always same as weight. Drag is not always same as Thrust. During cruise, lift is equal to weight and Thrust is equal to drag.

12 - Question

Final velocity at the end of the landing phase will be ____________
a) zero
b) same as Approach speed
c) touchdown speed
d) same as climb rate