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Worksheets

mr.cris papers

Total questions: 73

Worksheet time: 37mins

Name
Class
Date
1.

Metallic materials are sub-categorized into:

a)

Ferrous and Non-ferrous

b)

Plastic and Ceramic

c)

Organic and Inorganic

2.

A ferrous material contains:

a)

Aluminium

b)

Iron

c)

Copper

3.

A non-ferrous material contains:

a)

Iron

b)

Metals but not iron

c)

Only plastics

4.

Stress that tends to lengthen a material is:

a)

Tension

b)

Compression

c)

Shear

5.

Stress that tends to shorten a material is:

a)

Torsion

b)

Compression

c)

Bending

6.

Stress tending to twist a material is:

a)

Shear

b)

Torsion

c)

Elastic stress

7.

Maximum stress without permanent deformation is:

a)

Ultimate stress

b)

Yield strength

c)

Elastic limit

8.

Stress where a material fractures is:

a)

Yield strength

b)

Ultimate stress

c)

Elasticity

9.

Ability to recover size/shape after deformation is:

a)

Elasticity

b)

Plasticity

c)

Malleability

10.

Ability to be reshaped but not recover after deformation is:

a)

Plasticity

b)

Elasticity

c)

Ductility

11.

Ability to be drawn into thinner sections without breaking is:

a)

Toughness

b)

Ductility

c)

Brittleness

12.

Ability to deform without breaking is:

a)

Toughness

b)

Malleability

c)

Brittleness

13.

Material property opposite of toughness is:

a)

Brittleness

b)

Hardness

c)

Ductility

14.

Density of aluminium alloys is approx:

a)

2.7 kg/dm³

b)

4.5 kg/dm³

c)

1.7 kg/dm³

15.

Density of titanium alloys is approx:

a)

2.7 kg/dm³

b)

4.5 kg/dm³

c)

1.7 kg/dm³

16.

Density of magnesium alloys is approx:

a)

1.7 kg/dm³

b)

2.7 kg/dm³

c)

4.5 kg/dm³

17.

Carbon added to an alloy increases:

a)

Brittleness

b)

Yield strength

c)

Corrosion

18.

Chromium added to an alloy provides:

a)

Corrosion resistance

b)

Ductility

c)

Density increase

19.

Nickel added to an alloy improves:

a)

Strength, wear, corrosion resistance

b)

Brittleness

c)

Density

20.

Titanium added to alloys improves:

a)

Strength-to-weight ratio

b)

Conductivity

c)

Magnetism

21.

“CRES” stands for:

a)

Corrosion Resistant Steel

b)

Cold Rolled Elastic Steel

c)

Copper Resistance Element Steel

22.

“HHT” stands for:

a)

High Heat-Treated

b)

Hardened High-Toughness

c)

Heat Handling Test

23.

In “AISI 4130”, the digit “4” refers to:

a)

Nickel-Chromium alloy

b)

Manganese

c)

Copper

24.

In “AISI 4130”, the digit “1” refers to:

a)

Molybdenum content

b)

Chromium

c)

Carbon content

25.

In “AISI 4130”, the “30” means:

a)

0.30% Carbon

b)

30% Chromium

c)

3% Nickel

26.

Steel alloys 4130 and 4340 are:

a)

Low-alloy steels

b)

High-strength steels

c)

Stainless steels

27.

Steel alloy 300M is used for:

a)

Aircraft landing gear

b)

Wiring

c)

Corrosion testing

28.

Heat treatment of carbon steel is mainly to:

a)

Improve mechanical properties

b)

Reduce density

c)

Remove oxidation

29.

Tempering steel alloys is a:

a)

Heat treatment process

b)

Cold rolling process

c)

Machining process

30.

Hardening of steel alloys is achieved by:

a)

Heating and rapid cooling (quenching)

b)

Cold hammering

c)

Electrical current

31.

Quenching uses:

a)

Oil, water, or air cooling

b)

Heat only

c)

Freezing

32.

Annealing is a process of:

a)

Softening the metal

b)

Hardening

c)

Welding

33.

Stainless steel is surface protected by:

a)

Passivation

b)

Anodizing

c)

Painting only

34.

Pure aluminium (99%) is unsuitable for aircraft structures because of:

a)

Low strength

b)

High density

c)

Poor conductivity

35.

Pure aluminium can be hardened?

a)

Yes, by heat treatment

b)

No, only by alloying

c)

Yes, by tempering only

36.

Aluminium alloys are often “clad” with:

a)

Pure aluminium

b)

Titanium

c)

Copper

37.

ALCLAD means aluminium sheet metal:

a)

Alloy core with pure aluminium coating

b)

Pure aluminium sheet only

c)

Titanium bonded with aluminium

38.

Heat treatment of aluminium alloys has 3 steps in order:

a)

Solution heat treatment → Quenching → Age hardening

b)

Quenching → Tempering → Forging

c)

Cold working → Quenching → Welding

39.

In aluminium tempering, letter “F” means:

a)

As fabricated

b)

Fully hardened

c)

Flame treated

40.

In aluminium tempering, letter “H” means:

a)

Strain hardened

b)

Heat treated

c)

Ham

41.

In aluminium tempering, letter “F” means:

a)

As fabricated

b)

Fully hardened

c)

Flame treated

42.

In aluminium tempering, letter “H” means:

a)

Strain hardened

b)

Heat treated

c)

Hammered

43.

In aluminium tempering, letter “W” means:

a)

Solution heat treated, unstable temper

b)

Work hardened

c)

Welding hardened

44.

“GLARE” stands for:

a)

Glass Laminate Aluminium Reinforced Epoxy

b)

General Laminate Aluminium Resin Epoxy

c)

Glass Layer Aluminium Resistant Epoxy

45.

Fibreglass is made of strands of:

a)

Glass

b)

Carbon

c)

Kevlar

46.

CFRP stands for:

a)

Carbon Fibre Reinforced Plastic

b)

Composite Fibre Resin Product

c)

Chemical Fibre Reinforced Polymer

47.

GFRP stands for:

a)

Glass Fibre Reinforced Plastic

b)

Graphite Fibre Resin Polymer

c)

Galvanised Fibre Reinforced Plastic

48.

In composites, “prepregs” means:

a)

Fibres pre-impregnated with resin

b)

Fibres without resin

c)

Dried fibres

49.

Common composite inspection method is:

a)

Tap test

b)

Magnetic test

c)

Dye penetrant

50.

In composites, delamination means:

a)

Separation of layers

b)

Resin curing

c)

Surface oxidation

51.

Water break test verifies:

a)

Surface cleanliness

b)

Corrosion depth

c)

Adhesive hardness

52.

Pot life refers to:

a)

Time before mixed adhesive hardens

b)

Shelf storage time

c)

Maximum curing temperature

53.

Shelf life refers to:

a)

Storage time before use

b)

Time before curing

c)

Maximum strength period

54.

Corrosion on metals is caused by:

a)

Natural chemical reactions with environment

b)

Only fatigue

c)

Only temperature

55.

Corrosion product of steel is:

a)

Rust (iron oxide)

b)

Aluminium oxide

c)

Magnesium chloride

56.

Corrosion product of aluminium is:

a)

Aluminium oxide

b)

Rust

c)

Zinc oxide

57.

Pitting corrosion appears as:

a)

Small cavities or holes

b)

Large surface flakes

c)

Smooth surface cracks

58.

Stress corrosion is:

a)

Cracking due to combined stress and corrosion

b)

Only surface oxidation

c)

Only heat effect

59.

Exfoliation corrosion is:

a)

Layer-like lifting of material grain boundaries

b)

Smooth surface rusting

c)

Polished surface cracks

60.

Rivet code “2117 AD” refers to:

a)

Standard aircraft rivet, dimpled head

b)

Common aircraft rivet (field rivet)

c)

Titanium rivet

61.

Rivet code “2024 DD” means:

a)

Extra strong aluminium rivet

b)

Monel rivet

c)

Steel rivet

62.

Rivet code “5056 B” is used where:

a)

Magnesium alloy structures

b)

Stainless steel structures

c)

Titanium alloys

63.

Titanium rivets are designated by letter:

a)

T

b)

Ti

c)

TT

64.

Hi-Lok rivets are:

a)

Threaded pin fasteners with collar

b)

Blind rivets

c)

Steel solid rivets

65.

Main advantage of Hi-Lite rivets is:

a)

Lighter than Hi-Lok

b)

Cheaper than solid rivets

c)

Stronger than bolts

66.

Lockbolts are:

a)

High-strength, vibration-resistant fasteners

b)

Ordinary blind rivets

c)

Temporary fasteners

67.

Olympic-Lok rivets are special because:

a)

Installed from one side only

b)

Made of titanium

c)

Pre-heated before use

68.

Aircraft rigid pipes are normally made of:

a)

Aluminium, steel, or titanium

b)

Plastic

c)

Wood

69.

Aircraft hoses must be installed:

a)

Untwisted, with slack for flexibility

b)

Twisted tightly

c)

With no slack at all

70.

Rivet code “MS 20470 AD 5-12”: the “AD” indicates:

a)

2117 aluminium alloy

b)

2024 aluminium alloy

c)

Steel alloy

71.

In rivet code “MS 20470 AD 5-12”, the number “5” refers to:

a)

Diameter in 32nds of an inch

b)

Length in 16ths of an inch

c)

Head type

72.

In rivet code “MS 20470 AD 5-12”, the number “12” refers to:

a)

Length in 16ths of an inch

b)

Diameter in inches

c)

Rivet alloy code

73.

Solution annealing of aluminium rivets is done to:

a)

Soften for driving

b)

Increase corrosion resistance

c)

Reduce density

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