M11.2

Question 1

What is the difference between monocoque and semi monocoque construction?

Answer 1

The difference is that monocoque construction has no bracing members and therefore the skin takes all the load whereas semi monocoque has bracing members that provide structural strength and carry the loads.

Question 2

Do you floorboards have to be environmentally sealed?

Answer 2

Yes

Question 3

What is the job of nacelle?

Answer 3

To contain the engine and its accessories and to reduce the aerodynamic profile of the engine

Question 4

What is the strongest type of joining method?

Answer 4

Nut and bolt

Question 5

In most cases, the structural members are designed to carry … loads rather than … loads.

Answer 5

End loads, side loads.

Question 6

True or false: the failsafe method relies upon the duplication of certain structural members.

Answer 6

True

Question 7

What is the damage tolerance method/concept?

Answer 7

It is the concept that should serious damage occur to the structure then the remaining structure will withstand reasonable loads, until the damage is detected

Question 8

What is fatigue?

Answer 8

Where a material will fracture after a series of cyclic loads that may be much less than the ultimate load.

Question 9

What are the three classifications of aircraft structures?

Answer 9

Primary secondary and tertiary

Question 10

Name all six dresses that can affect a structure of an aircraft

Answer 10

Compression, torsion, tension, hoop stress, shear and bending

Question 11

What classification of structure would a wing root fairing be?

Answer 11

Tertiary

Question 12

What are the structural members of the aircraft design to do?

Answer 12

Carry a load or resist stress

Question 13

Describe compression stress

Answer 13

It is stress that resists a crushing force

Question 14

Describe torsion stress

Answer 14

Stress that causes twisting

Question 15

What two stresses is bending stress a combination of?

Answer 15

Compression and tension

Question 16

Name one side effect of hoop stress

Answer 16

Causes the compartment to stretch longitudinally, the other causes the circumference of the compartment to expand

Question 17

What is the abbreviation for body station?

Answer 17

BS

Question 18

What are the three axes of motion on an aircraft?

Answer 18

Longitudinal, lateral and vertical

Question 19

What are the aircraft zones?

Answer 19

The primary areas of the aircraft fuselage, the wings and the engine

Question 20

What are body water lines?

Answer 20

They are the horizontal planes at right angles to the body stations and the body buttock lines

Question 21

Where is the body buttock line zero located?

Answer 21

It is the body centre line

Question 22

What is the abbreviation for left body buttock line?

Answer 22

L BBL

Question 23

Is the reference plane of an aircraft swing the same as (parallel to) the dihedral angle of the wing?

Answer 23

Yes

Question 24

What are nacelles divided into?

Answer 24

In the cell stations, nacelle buttock lines and nacelle waterlines

Question 25

Where is the nacelle station zero located?

Answer 25

In front of each forward engine mount

Question 26

What is the nacelle buttock line defined by?

Answer 26

The wing buttock lines

Question 27

What are the nacelle water lines parallel to?

Answer 27

The wing reference plane

Question 28

The stabiliser chord plane is also called what?

Answer 28

Horizontal stabiliser reference plane

Question 29

At what angle is the horizontal stabiliser buttock line to a stabiliser chord plane?

Answer 29

90°

Question 30

How does the horizontal stabiliser buttock line lay in relationship to the body centre line?

Answer 30

Parallel to it

Question 31

Where is the horizontal stabiliser station zero?

Answer 31

At the intersection of the leading edge extension and the horizontal stabiliser buttock line zero

Question 32

Where is the rudder station zero?

Answer 32

At the intersection of the rudder hinge centreline and the body waterline

Question 33

What are the vertical stabiliser coordinates divided into?

Answer 33

Fin stations, water lines, leading edge stations and rudder stations

Question 34

Where is the vertical stabiliser leading edge station?

Answer 34

At right angles to the stabiliser leading edge

Question 35

Where is the rudder station located?

Answer 35

At right angles to the rudder hinge centre line

Question 36

How many major zones are there?

Answer 36

Eight

Question 37

What is the wing reference plane known as?

Answer 37

Wing Datum

Question 38

Where is the right angle of the wing reference plane formed?

Answer 38

At a right angle to rib one

Question 39

Is the nacelles station zero located from the same point as the body station zero?

Answer 39

No it is located aft of the body station zero

Question 40

What are the major zones divided into and why?

Answer 40

They are divided into sub major zones so it is easy to locate assemblies, subassemblies and panels

Question 41

Generally what type of numbers are on the right hand side of the aircraft?

Answer 41

Even

Question 42

What does the first, second and third digit represent?

Answer 42

Major zone, sub major zone, and zone

Question 43

What two types of damage does lightning strikes usually result in?

Answer 43

Direct and indirect

Question 44

Where are the most likely areas for lightning strikes to occur?

Answer 44

The fuselarge nose section and the aerofoil trailing edge tips

Question 45

When installing grounds what are the three conditions that apply?

Answer 45

Grounds must be separated; AC, DC and shields, there must be no more than four terminals on one stud, and in a fuel vapour area dual grounds must be installed

Question 46

How are fluids directed to drainholes?

Answer 46

By a system of longitudinal and cross drain paths through the stringers and frame shear clips

Question 47

What load does a tie rod take?

Answer 47

Tensile

Question 48

What are the two types of general types of fuselage construction?

Answer 48

Monocoque and truss type

Question 49

In a true monocoque construction, what gives shape to the fuselage?

Answer 49

Formers, frame assemblies and bulkheads

Question 50

Why are floorboards in wet areas sealed?

Answer 50

To prevent moisture ingress which could cause galvanic corrosion

Question 51

What is zone 100?

Answer 51

The lower half of the fuselage

Question 52

What is there in 200?

Answer 52

The upper half of the fuselage

Question 53

What is zone 300?

Answer 53

The empennage (tail)

Question 54

What is zone 400?

Answer 54

Power plants and struts

Question 55

What is in zone 500?

Answer 55

The left wing

Question 56

What is in zone 600?

Answer 56

The right wing

Question 57

What is in zone 700?

Answer 57

The main landing gear and landing gear doors

Question 58

What is in zone 800?

Answer 58

The doors