ATAT 104 - Week 2
What is the more popular Truss design for aircraft?
Burr Arch Truss.
K. Truss
Pratt. Truss
Howe Truss.
On a truss type fuselage structure what are the long members that run to the back of the aircraft?
Web members.
Longerons.
Trusserons.
Stringers.
What is the difference between monocoque and semi-monocoque construction?
Semi-monocoque has stringers in its internal construction
The monocoque has only bulky heads
The semi-monocoque has only bulky heads
Monocoque has stringers in its internal construction
What is the definition of strength?
The relationship between the strength of a material and weight
The ability of a metal to transmit heat or electricity
The ability of a metal to resist abrasion
The ability of that material to resist stress without breaking
What element is added to increase the hardness of steel?
Limestone
Carbon
Water
Iron
On a semi-monocoque airframe, what are the surface parts that carry the stresses?
Skins
Frames
Stringers
All of these parts
What kind of fuselage structure did the first aircraft use?
Truss
Solid
Paper
Titanium
What are the 2 type of truss fuselage structures used in aircraft?
Pratt and Whitney
Warren and Buffet
Boeing and Airbus
Pratt and Warren
In a monocoque fuselage structure, what part carries most of the loads?
Skin
Rivets
Former
Tubing
In a semi-mocoque fuselage structure, what carries most of the loads?
Chrome-molly tubes
Heat treated aluminum
Wings
Spars
What is this definition of? Ability of material to resist stress without breaking
Hardness
Toughness
Strength
Density
Which one is heavier type of fuselage?
Warren Truss
Pratt Truss
On a warren Truss type, what supports structural strength and stability?
Diagonal members
Longeron
Both
Early days of Pratt Truss were made of?
Wood
Paper
Love
Hatred
What motivated invention of semi-monocoque?
Aircrafts got more expensive
Aircrafts got faster
Aircrafts got heavier
Aircrafts got lighter
Most preferred aluminum fuselage type is?
Monocoque
Semi-monocoque
Which of the following is part of semi-monocoque structure?
Skin
Bulkhead
Formers
All of the other answers
What is this definition of? The ability of a metal to resist abrasion
Fusibility
Strength
Brittlness
Hardness
What is this definition of? The ability of a metal to become liquid by the application of the heat
Fusibility
Strength
Brittleness
Hardness
What is this definition of? The extent which it can be hammered, rolled, or pressed into various shapes without cracking and breaking
Fusibility
Strength
Malleability
Britlness
What is this definition of? Ability to be permanently drawn, bent, or twisted into various shapes without breaking
Fusibility
Malleability
Britleness
Ductility
which quality fractures when subjected to stress, but has a little tendency to deform without shattering?
Fusibility
Malleability
Britleness
Ductility
What is this definition of? Ability to transmit heat or electricity
Fusibility
Malleability
Ductility
Conductivity
What is this definition of? Ability to return to its original shape, when force which causes the change of shape is removed
Malleability
Ductility
Conductivity
Elasticity
What is this definition of? Ability to withstand tearing, stretching and deforming without breaking
Malleability
Ductility
Elasticity
Toughness
Mass of a unit volume of a material is?
Humidity
Density
Increased aircraft frame and engine performance
Decreased aircraft frame and engine performance
What is the main element in ferrous metal?
Iron
Copper
Gold
Silver
Pig iron is made of? Combination of Iron and?
limestone
Copper
Gold
Silver
Why do you add carbon to steal?
Make it cheaper
Make it softer
Make it easier to weld
Make it harder
Low Carbon steel is used for making _________
Safety Wire
Nuts
Cable brushings
All of the others
Medium Carbon steel is adaptable for
Machining or forging
Making bitcoin
making my mama proud
Pagod ako
What is this definition of? A small amount of other metal is added to the base metal
Tungsten
Carbon steel
Stainless steel
Alloy
True or false? Carbon steel can be used to form the base of steel alloys including Chromium, Cobalt, etc
True
False
Steel alloys are alloyed with which material to improve its properties of steel?
Carbon steel
Stainless steel
Structural steel
Tool steel
Society of Automotive Engineers (SAE) numerical index system designates what numbers in Carbon and Alloy Steels?
First digit - the type of steel
Second digit - major alloying element
Last two digits - approximate % of carbon
All of the others
What is special about stainless steel?
Corrosion resistant
Extreme light weight
Easy to weld
Shiny
Chrome Molybdenum, also referred to as Chrom-moly provides?
Ease of fabrication
Weldability
Mild hardenability
All of the other answers
Which characteristic is not true of tungsten?
Very resistant to corrosion
Has the highest melting point
Highest tensile strength of any element
Easy to shape
What is heat treatment of steel?
series of operations involving the heating and cooling
series of operations involving the heating metal
series of operations involving the heating, cooling and heating the steel
series of operations to make alloys
What is this definition of? Heating the metal to relieve internal stress, soften the metal and make it more ductile
Hardening
Softening
Molding
Annealing
What is this definition of? Increasing the strength of steel and making it less ductile by heating the steel and rapidly cooling it by plunging it into water or oil
Hardening
Annealing
Normalizing
Casehardening
Tempering reduces which characteristic?
Fusiblity
Melleability
Ductility
Brittleness
Tempering is always followed by or performed after which process?
Hardening
Softening
Normalizing
Annealing
What is this definition of? Removing the internal stress by welding, machining, forming or any type of handling
Annealing
Softening
Normalizing
Hardening
What is case hardening?
Hardening the engine of case
Hardening the core structure
A hard wear-resistant surface
Hard painted on surface
Types of case hardening include?
Nitriding
Carburizing
Both
True or false? Carburizing is a process of case hardening where its surface is hardened, but its core is relatively soft
True
False
True or false? Nitriding is a case hardening process which requires special nitriding furnace
True
False
True or false? Hardening and tempering is required before nitriding
True
False
Why do we nitride?
To achieve desired thickness
To achieve desired fusibility
To achieve desired mellability
To achieved desired conductivity
What causes corrosion?
Decarboxylation
Oxidation
Polymerisation
hydrogenation
What is the best way to protect steel from corrosion?
Keep it indoors
Spray it with oxygen
Keep it away from water
Paint it
What is the difference Warren Truss and Pratt Truss?
Warren Truss has vertical members
Pratt Truss has vertical members
Warren Truss has Horizontal members
Pratt Truss has horizontal members
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