Aircraft Design - Crew Station, Passengers, and Payload Quiz(MCQ)
A)
Lift only
B)
Weight effects only
C)
Vision requirements
D)
Drag required only

Explanation : Vision requirements are one of the primary factor affecting overall crew station or cockpit design. Lift affects aerodynamics of the aircraft. Weight will affect lift requirements.

A)
Only to increase lift
B)
Only to reduce weight
C)
To provide obstruction to vision
D)
To provide unobstructed runway vision

Correct Answer :   To provide unobstructed runway vision

Explanation : A cockpit design is highly affected by pilot’s vision requirements. The Pilot must be able to view the runway when they are on final approach. Hence, to provide unobstructed runway vision nose of the a/c must slope away from the eye of pilot.

3 .
Which of the following is incorrect?
A)
Lofting is mathematical model for skin
B)
Cockpit is always located directly above the wing
C)
Conceptual design is first phase of the design process
D)
Cockpit design is affected by visual requirements of pilot

Correct Answer :   Cockpit is always located directly above the wing

Explaination : Cockpit is not always located at the wing. Lofting is done to provide mathematical model of our aircraft. Conceptual design is the first phase of aircraft design process. In conceptual design we will be dealing with some fundamental principles of design of an aircraft.

4 .
Which range of pilot size are used to design a typical military aircraft?
A)
Size from 5th to 95th percentile for male pilots
B)
Size from 0th to 2nd percentile
C)
Size of 3rd percentile always
D)
Size doesn’t concern of design

Correct Answer :   Size from 5th to 95th percentile for male pilots

Explaination : Typically, cockpit of an aircraft is designed for particular size range of pilot. A typical military aircraft has cockpit design which can accommodate 5th to 95th percentile of male pilots.

5 .
Following diagram represents ____
A)
wing layout
B)
typical glider
C)
typical fighter cockpit
D)
typical empennage

Correct Answer :   typical fighter cockpit

Explaination : A typical fighter cockpit is shown in the diagram. The above diagram is representing a typical cockpit designed for 95th percentile pilot. Glider is type of aircraft. The empennage is tail section of aircraft. Wing layout is based on its planform shape.

A)
Seat back angle
B)
Seat reference angle
C)
Same as over nose angle
D)
Smallest angle between pilotâ€™s line of vision and the cockpit windscreen

Correct Answer :   Smallest angle between pilotâ€™s line of vision and the cockpit windscreen

Explanation : The transparency grazing angle is defined as the smallest angle between pilot’s line of vision and the cockpit windscreen. It is not same as the overnose angle. Seat reference point is defined as the point where seat pan meets back.

7 .
Higher seat back angle (>60°) will result in _________
A)
drag increment
B)
improvement to withstand high- g loads
C)
maximum drag
D)
outside vision improvement

Explaination : Typically, seat back angle can vary from 12° to 40°. However, some more advanced studies consider seat back angle of up to 70-75 degrees. This is much higher seat back angle will improve pilot’s ability to withstand high g turns.

A)
Seat pan meets the back
B)
C)
Lift is concentrated
D)
Weight is carried out in cockpit

Correct Answer :   Seat pan meets the back

Explanation : The point at where seat pan meets back is termed as seat reference point. It can be used to define fundamental terms in cockpit design. Legroom requirement, height etc. are using seat reference point as a reference.

A)
Seat length
B)
Pilotâ€™s eye point
C)
CG of aircraft
D)
Seat reference point

Correct Answer :   Pilotâ€™s eye point

Explanation : Pilot’s eye point is used to define the overnose angle. Grazing angle, pilot’s head clearance is also defined by using pilot’s eye point. Seat reference point can be used to provide reference to legroom.

A)
pitch only
B)
aisle only
C)
D)

Explanation : Passenger cabin is defined by using number of factors such as pitch, headroom, aisle etc. Each factor will be used to determine cabin layout. Only pitch or headroom or only aisle cannot be used for layout.

A)
Height of seat
B)
Length of one seat plus height of seat
C)
Height of seat minus height of next respective seat
D)
Distance from the back of one seat to the back of next respective seat

Correct Answer :   Distance from the back of one seat to the back of next respective seat

Explanation : Seat pitch is defined as the distance from the back of one seat to back of the next respective seat. Height of seat is defined from floor. By properly considering pitch of seat we can alter the number of seats in passenger cabin.

A)
Vertical distance from the floor to the roof cover seat
B)
Height of seat
C)
Length of one seat plus height of seat
D)
Height of seat measured height of next respective seat

Correct Answer :   Vertical distance from the floor to the roof cover seat

Explanation : Headroom is height measured from floor to roof over seat. Headroom is one of the fundamental factor which can affect overall layout of passenger cabin. A typical commercial economy class will include headroom of more than 60in.

A)
Height of seat from floor
B)
Passage between two rows
C)
Length of one seat plus height of seat of second row
D)
Height of seat measured height of next respective seat

Correct Answer :   Passage between two rows

Explanation : Aisle is nothing but passage between 2 rows of seats. Aisle can be used to determine a typical number of seat rows in passenger compartment of the aircraft.

A)
34 in
B)
35 in
C)
32m
D)
34m

Explanation : External diameter D = Internal diameter d + 2* structural thickness t
For a small business jet typical value of t is 1in.
Hence, D=d+2t = 32+2*1= 34in.

15 .
Following diagram represents _______
A)
B)
height of seat
C)
pitch of seat
D)
seat diameter

Correct Answer :   pitch of seat

Explaination : Pitch of the seat or seat pitch is defined as the distance measured from back of one seat to the back of another seat. As shown in the figure, here distance is shown from back of one seat to back of another seat. Hence, the following diagram is illustrating the concept of Pitch of seat.

16 .
In following diagram the term mark by '?' is showing ____
A)
pitch
B)
C)
seat back angle
D)
over nose angle

Explaination : The term marked by ‘?’ is called headroom. Headroom is nothing but the vertical distance measured from floor to the roof over seat. Pitch of seat is used for legroom. Head clearance can be used to determine headroom requirements.

A)
142in
B)
150in
C)
167in
D)
172in

Explanation : Given, external diameter D = 150in.
Door jumbo jet, structural thickness t = 4in.
Hence, internal diameter d is given by, d = D – 2*t = 150 – 2*4 = 142in.

18 .
Following diagram represents _____
A)
semisubmerged
B)
cabin
C)
fully external
D)
fully submerged

Explaination : In an external system, weapons are located outside of the aircraft body such as at pylon etc. Semisubmerged type is shown in above diagram. Semisubmerged weapons are located partially outside and inside of fuselage as well. This is shown in above diagram.

19 .
Following diagram is showing ______
A)
conformal
B)
semi submerged
C)
internal weapon carriage
D)
typical external weapon carriage

Correct Answer :   typical external weapon carriage

Explaination : As shown in the figure, a typical external weapon carriage type is shown. The above diagram is explaining some fundamental principles of an external weapon carriage. As shown in the figure, weapons are located at outside of the aircraft body; mostly below wings as shown.

A)
Conformal
B)
Tail dragger
C)
Omni external
D)
Uni Conformal

Explanation : Weapon carriage is primarily consideration of military aircraft. Weapon carriage can be of many different types; one of them is conformal weapon carriage system. Tail dragger is landing gear arrangement.

A)
Aft CG
B)
Fore CG
C)
CG of aircraft
D)
Always at tail section

Correct Answer :   CG of aircraft

Explanation : Substantial portions of the total aircraft weight are weapons. Typically, weapons are placed near the CG of an aircraft. This would help to make aircraft less influenced by weapons for example, aircraft can perform pitch up when weapon is released and hence, by locating near CG, we can reduce such effects.

A)
Bombs only
B)
High lift device
C)
Vortex generator
D)
Missile, gun, bombs, etc

Correct Answer :   Missile, gun, bombs, etc

Explanation : Weapon carriage is one of the important parameters in military aircraft. Traditional and typical weapons are guns, bombs, missiles etc. High lift device is used to generate a higher lift. Vortex generator will generate vortex.

23 .
Following diagram represents _____
A)
longerons
B)
rail launch system
C)
free falling
D)
lofting process

Correct Answer :   rail launch system

Explaination : Typically missile can be launched in two different ways. Above diagram is showing a typical rail launched mechanism. Rail launcher is typically mounted to the aircraft at either wingtip or a pylon.

24 .
Following diagram represents _________
A)
typical ejection launch
B)
typical rail launch
C)
lift Increment method
D)
drag reduction design

Correct Answer :   typical ejection launch

Explaination : In the above diagram a typical ejection launch mechanism for missile is shown. Missile is connected through some hooks which can quickly release the Missile from aircraft. Generally this system is used for larger missiles.

25 .
Following diagram represents ______
A)
conformal
B)
fully submerged
C)
internal weapon carriage
D)
external weapon carriage

Explaination : A typical conformal weapon carriage system is shown in the figure. As shown in the above diagram, weapons are mounted at the bottom of the fuselage. This reduces drag generated by weapons as compared to the external weapon carriage.

26 .
Following diagram represents ________
A)
conformal
B)
internal weapon carriage
C)
external weapon carriage
D)
non submerged weapon carriage

Correct Answer :   internal weapon carriage

Explaination : An internal weapon carriage system is presented in the above diagram. As shown in the figure, weapons are located inside the aircraft itself. This helps to reduce the drag tremendously. Drag produced by internal weapon carriage is lowest among all 4 types of weapon carriage.

A)
Highest possible RCS
B)
RCS is more than external
C)
RCS is more than conformal
D)
Weapon RCS will tend to be none

Correct Answer :   Weapon RCS will tend to be none

Explanation : An internal weapon carriage system hides weapon from radar detection. This is due to fact that weapons are located inside the aircraft itself in an internal weapon carriage system. Conformal configuration has more RCS than internal weapon carriage system.

28 .
Following diagram represents ________
A)
cabin
B)
cockpit
C)
rotary weapons bay
D)
linear motion

Correct Answer :   rotary weapons bay

Explaination : Rotary weapons bay is a special type of internal weapon carriage system. A typical rotary weapons bay is shown in diagram. This arrangement can be used to launch all of the weapons through single door.

A)
Conformal
B)
Internal carriage
C)
External always
D)
Rail launch system always

Explanation : External weapon carriage system is known to produce the highest drag. Conformal system reduces drag at some extent. Drag produced by semi submerged falls between conformal and internal. An internal weapon carriage system will provide least drag among all mentioned options.

A)
Lowest possible weight
B)
Drag will be more than external carriage
C)
Drag will be lower than that of the external carriage
D)
Indentation will increase structural weight in this type of weapon carriage

Correct Answer :   Indentation will increase structural weight in this type of weapon carriage

Explanation : Semisubmerged type of weapon carriage will reduce drag and have a lesser than of the external weapon carriage. Semisubmerged type will increase structural weight sure to indentations in aircraft.

31 .
Following diagram represents ______
A)
typical gun
B)
missile layout
C)
rocket system
D)
missile launch system

Explaination : Gun is one of the most common and important weapons used in military aircraft. The above diagram is showing typical gun viewed from side. Gun should be located based on mission requirements. Ammunition container is typically located at aft end of the gun as shown.

A)
Conformal
B)
External carriage
C)
Internal carriage
D)
Rail launch system always

Explanation : External weapon carriage system provides more flexibility to carry different weapons. This is one of the advantages of an external type weapon carriage.

A)
external always
B)
internal carriage
C)
conformal
D)
rail launch system always