Question 1

Which material is most suitable for aircraft operating at high altitudes and temperatures?

Accepted Answer

Titanium, for its heat & strength resistance

Answer

Wood, for its ability to absorb shock

Answer

Steel, for its strong tensile properties

Answer

Aluminum, for its lightweight structure

Question 2

How can environmental damage to wood structures in historical aircraft be best prevented?

Accepted Answer

Apply protective treatments regularly

Answer

Coat the surface with aluminum

Answer

Use synthetic fabric instead of cotton

Answer

Increase wood thickness for durability

Question 3

Which modern material enhances aircraft durability in humid environments?

Accepted Answer

Carbon fiber

Answer

Spruce wood

Answer

Ash wood

Answer

Cotton fabric

Question 4

Which material combination ensures flexibility and easy repair in ultralight aircraft?

Accepted Answer

Wood-laminate and fabric

Answer

Titanium and fiberglass

Answer

Wood and Kevlar

Answer

Carbon fiber and aluminum

Question 5

Which material offers the highest tensile strength for aircraft landing gear?

Accepted Answer

Steel

Answer

Aluminum

Answer

Fiberglass

Answer

Wood

Question 6

What makes carbon fiber ideal for high-performance jets?

Accepted Answer

Exceptional strength-to-weight ratio

Answer

Low production cost

Answer

Ease of machining and shaping

Answer

High corrosion resistance

Question 7

Which material is best for aircraft parts exposed to extreme temperature changes?

Accepted Answer

Titanium for its heat resistance

Answer

Aluminum for its malleability

Answer

Steel for its high tensile strength

Answer

Carbon fiber for its stiffness

Question 8

What is a key advantage of composites over metals in aviation?

Accepted Answer

Composites resist corrosion and weigh less

Answer

Metals are cheaper and easier to mold

Answer

Metals perform better under high stress

Answer

Composites are stronger but need more upkeep

Question 9

Which innovation best solves corrosion issues in aircraft without adding weight?

Accepted Answer

Self-healing Kevlar composites

Answer

Steel with advanced coatings

Answer

High-temperature fiberglass

Answer

Aluminum with anodizing process

Question 10

How do synthetic fabrics like Dacron improve aircraft surface longevity?

Accepted Answer

By resisting UV and moisture damage

Answer

By allowing lighter aircraft design

Answer

By reducing the need for UV coatings

Answer

By increasing the fabric tensile strength

Question 11

What is the benefit of hot working metal in aircraft construction?

Accepted Answer

Makes metal more malleable and crack-free

Answer

Improves surface finish quality and efficiency

Answer

Increases hardness and strength

Answer

Reduces need for successive heat treatment

Question 12

What occurs when steel ingots are placed in soaking pits during hot working?

Accepted Answer

Interior solidifies as temperature equalizes

Answer

Ingots are rolled into shapes like sheets or bars

Answer

Brittleness increases through annealing

Answer

Ingots are cooled to stay molten

Question 13

Why is tempering important after hardening aircraft metal parts?

Accepted Answer

Increases toughness and reduces brittleness

Answer

Enhances hardness without losing toughness

Answer

Creates uniform grain structure

Answer

Improves malleability for further shaping

Question 14

Which process softens metal that is too hard and brittle after heat treatment?

Accepted Answer

Annealing

Answer

Normalizing

Answer

Cold working

Answer

Tempering

Question 15

When is smith forging most suitable in aircraft metalworking?

Accepted Answer

For making small, precise high-grade parts

Answer

For pressing large parts with a uniform force

Answer

For producing large aircraft structural components

Answer

For rolling billets into thin sheets

Question 16

Which pyrometer type best records furnace temperatures during heat treatment?

Accepted Answer

Recording pyrometer

Answer

Indicating pyrometer

Answer

Thermocouple pyrometer

Answer

Extension pyrometer

Question 17

Why are electric furnaces preferred in precision aircraft metalworking?

Accepted Answer

They offer better temperature control

Answer

They heat up faster than fuel-fired ones

Answer

They reduce metal oxidation risk

Answer

They reach higher operating temperatures

Question 18

What is a key limitation of cold working for aircraft parts?

Accepted Answer

Excessive brittleness needing heat treatment

Answer

No improvement in the ultimate tensile strength

Answer

Inability to change metal properties

Answer

Poor surface finish quality

Question 19

What is the main purpose of soaking metal parts during hot working?

Accepted Answer

To maintain uniform temperature

Answer

To cool metal rapidly after heating

Answer

To refine the grain structure

Answer

To harden metal for final use

Question 20

Which cooling medium best minimizes warping during metal quenching?

Accepted Answer

Oil

Answer

Water

Answer

Brine

Answer

Air

Question 21

Why were magnesium alloys introduced in aircraft during World War II?

Accepted Answer

To reduce weight in performance components

Answer

To improve elasticity in aircraft structural parts

Answer

To increase thermal conductivity

Answer

To enhance corrosion resistance

Question 22

What key property makes carbon fiber composites widely used in aircraft today?

Accepted Answer

Excellent strength-to-weight ratio

Answer

Low electrical conductivity

Answer

High hardness and surface durability

Answer

Superior malleability and shaping

Question 23

Why was riveting important in aircraft design during the 1920s?

Accepted Answer

It allowed lightweight joining of metal sheets

Answer

It reduced malleability of metal sheets

Answer

It enhanced thermal conductivity of components

Answer

It improved fusibility during welding

Question 24

Why is aluminum commonly used for wing spars in aircraft?

Accepted Answer

Low density and lightweight

Answer

High electrical conductivity

Answer

High fusibility during welding

Answer

High brittleness under stress

Question 25

Which metal property is most important for landing gear components?

Accepted Answer

Toughness to absorb impact

Answer

Ductility for shaping

Answer

Thermal expansion regulation

Answer

Fusibility for stress-free welding

Question 26

What property of steel is most vital for aircraft engine mounts?

Accepted Answer

Strength to resist vibration

Answer

Brittleness under pressure

Answer

Conductivity for heat transfer

Answer

Fusibility for welding

Question 27

Which property ensures spring steel returns to shape after landing impact?

Accepted Answer

Elasticity for shape recovery

Answer

Toughness to resist damage

Answer

Ductility for easy forming

Answer

Brittleness for rigidity

Question 28

Why are nickel-based superalloys used in jet engines?

Accepted Answer

For resistance to extreme heat

Answer

For impact absorption during landing

Answer

For efficient electrical conductivity

Answer

For high fusibility in welding

Question 29

High fusibility in metals is needed for which aircraft maintenance task?

Accepted Answer

Welding joints and components

Answer

Increasing aircraft material hardness

Answer

Reducing aircraft componentsâ€™ density

Answer

Conducting electrical signals

Question 30

What is the main benefit of aluminum-lithium alloys in aircraft?

Accepted Answer

Reduced weight with retained strength

Answer

Higher malleability than aluminum

Answer

Greater thermal expansion capability

Answer

Lower cost than traditional alloys

Question 31

Why do ferrous metals like steel need coatings or alloying elements?

Accepted Answer

To prevent rust and corrosion

Answer

To make them non-magnetic

Answer

To improve magnetic properties

Answer

To increase tensile strength

Question 32

What distinguishes stainless steel from carbon steel in corrosion resistance?

Accepted Answer

Stainless steel has chromium for corrosion resistance

Answer

Carbon steel is naturally corrosion-resistant

Answer

Carbon steel doesnâ€™t need protective coatings

Answer

Stainless steel needs nickel to resist corrosion

Question 33

How does cold working affect ferrous metals like steel?

Accepted Answer

Increases strength but reduces weldability

Answer

Decreases strength and increases ductility

Answer

Increases malleability but lowers toughness

Answer

Improves formability and reduces hardness

Question 34

Why are nickel steels used in aviation applications?

Accepted Answer

For corrosion resistance in harsh environments

Answer

For superior malleability and shaping

Answer

For high tensile strength and toughness

Answer

For lightweight and easy forming

Question 35

Which metal is best for aircraft control cables?

Accepted Answer

18-8 Stainless Steel

Answer

Carbon steel

Answer

Chrome-Vanadium steel

Answer

High carbon steel

Question 36

Why is beryllium copper used in aircraft bearings and bushings?

Accepted Answer

High strength after heat treatment

Answer

Excellent magnetic properties

Answer

Corrosion resistance in saltwater

Answer

Low weight and good heat transfer

Question 37

Why is magnesium used in aircraft wing and instrument panels?

Accepted Answer

Lightweight, good strength to weight ratio

Answer

High corrosion resistance

Answer

More superior tensile strength over titanium

Answer

Better malleability than aluminum

Question 38

What safety measure is required for extinguishing magnesium fires?

Accepted Answer

Use graphite or soapstone powder

Answer

Cover with sand to smother fire

Answer

Use water to cool the flames

Answer

Use carbon dioxide extinguishers

Question 39

Why is 2024 Aluminum Alloy preferred for aircraft skin?

Accepted Answer

High strength with fatigue resistance

Answer

Better corrosion resistance than 7075

Answer

High weldability and easy forming

Answer

High strength-to-weight ratio

Question 40

Why are 3000 series aluminum alloys non-heat treatable?

Accepted Answer

Manganese is the primary element

Answer

Magnesium forms silicide compounds

Answer

Silicon is the dominant additive

Answer

Zinc is the main alloying element

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