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Introduction to Forms of Supply

Total questions: 61

Worksheet time: 31mins

Name
Class
Date
1.

Which statement best explains why materials are supplied in different forms for manufacturing?

a)

To increase the number of suppliers involved

b)

To make storage more complicated for factories

c)

To avoid meeting safety regulations entirely

d)

To match process needs and part geometry

2.

Which example correctly matches a product with a suitable material form?

a)

Pipelines with casting material

b)

Engine blocks with pipe material

c)

Car panels with sheet material

d)

Car panels with powder material

3.

Which approach modifies material properties through thermal methods rather than mechanical methods?

a)

Cold working operations

b)

Heat treatment processes

c)

Rolling and drawing

d)

Pressing and bending

4.

Cold working is best described as which of the following?

a)

Powder sintering under high vacuum conditions

b)

Rapid quenching to increase ductility greatly

c)

Heating above melting temperature of the metal

d)

Plastic deformation below recrystallisation temperature

5.

Which set lists common cold working methods?

a)

Extrusion, injection molding, carburizing, quenching

b)

Solution treating, aging, hot isostatic pressing

c)

Rolling, drawing, pressing, bending, hammering

d)

Casting, forging, sintering, annealing, tempering

6.

Which supply form is typically used for long, uniform cross-sections such as round, square, or hex shapes?

a)

Plate stock with wide flat surfaces

b)

Sheet stock with thin flexible form

c)

Coated sheet with zinc layer

d)

Bar stock with consistent cross-section

7.

At what thickness does a flat metal product generally transition from being called a sheet to being called a plate?

a)

Around 0.5–1 mm thickness

b)

Around 2–3 mm thickness

c)

Around 6 mm thickness

d)

Around 12 mm thickness

8.

Which option best describes common uses of plates in engineering?

a)

Structural components and base plates

b)

Electrical wiring and small coils

c)

Precision springs and watch parts

d)

Thin cladding and roofing panels

9.

Which statement correctly distinguishes sheet from plate?

a)

Sheet is thicker and more rigid than plate

b)

Sheet is thinner and more formable than plate

c)

Sheet has irregular cross-sections unlike plate

d)

Sheet is only supplied with protective coatings

10.

What is the primary purpose of galvanised coated sheets in engineering applications?

a)

Improve electrical conductivity for circuits

b)

Enhance hardness through heat treatment

c)

Provide corrosion resistance via zinc coating

d)

Increase magnetic response for motors

11.

Which bar shape is LEAST typical for general bar stock?

a)

Wide flat plates for gussets

b)

Hex bars for fastener blanks

c)

Square bars for frames and keys

d)

Round bars for shafts and pins

12.

A fabricator needs thin material for deep drawing of automotive panels. Which supply form is most appropriate?

a)

Galvanised bar for corrosion resistance

b)

Hex bar for precision fasteners

c)

Sheet metal for high formability

d)

Thick plate for heavy machining

13.

Why might a designer specify galvanised sheet rather than plain sheet for an outdoor enclosure?

a)

To reduce density and weight significantly

b)

To allow magnetic induction hardening

c)

To obtain zinc-based corrosion protection

d)

To increase thickness beyond plate limits

14.

Which statement best distinguishes a pipe from a tube in engineering applications?

a)

Pipe is only round, tube is only rectangular or square

b)

Pipe is for structural loads only, tube is for fluids only

c)

Pipe has thinner walls always, tube has thicker walls always

d)

Pipe prioritizes flow capacity, tube prioritizes precise dimensions

15.

In casting complex shapes, what is the primary role of the mould?

a)

Rapidly quench the metal to improve hardness

b)

Apply compressive load to reduce porosity

c)

Increase alloy carbon content during solidification

d)

Provide cavity geometry for molten metal to solidify

16.

Which sequence correctly outlines a basic sand casting process?

a)

Extrude through die, stretch, solution treat

b)

Heat metal, hammer into die, water quench

c)

Cut billet, machine features, surface finish

d)

Prepare mould, pour molten metal, allow solidification

17.

Which defect most likely results from insufficient sand permeability during casting?

a)

Shrinkage cavities at isolated hot spots

b)

Hot tears near thick-to-thin transitions

c)

Cold shuts at converging metal fronts

d)

Gas porosity pockets within the casting

18.

When selecting between pipe and tube for a heat exchanger coil, which factor most strongly favors tube?

a)

Tight dimensional tolerances for fit and performance

b)

Maximizing internal flow rate at any cost

c)

Eliminating need for corrosion-resistant alloys

d)

Ensuring components remain strictly circular only

19.

Which statement best explains why forged components often have higher strength than cast parts?

a)

Cooling creates random grain orientation

b)

Surface finish hides internal defects

c)

Forging always uses harder alloy compositions

d)

Grain flow aligns with load paths in forging

20.

During extrusion, what primarily forces the billet through the die to create a continuous profile?

a)

Compressive stress applied by a ram

b)

Thermal expansion driving the metal

c)

Shear stress from rotating rolls

d)

Tensile stress pulling the billet

21.

What benefit does grain flow around features like hubs or ribs provide in a forged part?

a)

Improved fatigue resistance under cyclic loads

b)

Reduced melting point for easier machining

c)

Uniform electrical conductivity in service

d)

Higher thermal expansion to relieve stress

22.

Which choice describes a key difference between open‑die and closed‑die forging?

a)

Open‑die always produces continuous extruded profiles

b)

Closed‑die cannot control final geometry precisely

c)

Open‑die relies on tensile loading to shape parts

d)

Closed‑die uses shaped cavities for near‑net forms

23.

In extrusion, why is die design crucial for product quality and process efficiency?

a)

Ensures billet melts before forming starts

b)

Prevents all residual stresses in product

c)

Controls metal flow and exit speed evenly

d)

Eliminates need for lubrication entirely

24.

In the image of glowing steel on rollers, which process category is being highlighted for changing material properties?

a)

Surface finishing techniques

b)

Additive manufacturing methods

c)

Cold working and heat treatment

d)

Powder metallurgy processes

25.

Which statement best defines melting point as shown with the furnace scene?

a)

Temperature at which liquid becomes solid

b)

Temperature where liquid becomes gas

c)

Temperature at which a solid becomes liquid

d)

Temperature where solid becomes plasma

26.

Aluminium melts at about 660°C. Which application benefits from this property, as suggested by the image?

a)

Forging thick steel shafts

b)

Casting complex aluminium parts

c)

Sintering ceramic powders

d)

Carburising low-carbon steel

27.

The slide titled Tempering describes reheating quenched steel to a moderate temperature then cooling. What is the primary purpose?

a)

Increase brittleness significantly

b)

Reduce brittleness while keeping hardness

c)

Lower density by heat treatment

d)

Eliminate hardness entirely

28.

Which component is a typical application for tempered steel shown on the tempering slide?

a)

Electrical insulators

b)

Tools and machinery parts

c)

Concrete aggregates

d)

Food packaging films

29.

You compare samples by density to identify materials. Which simple procedure is most appropriate?

a)

Measure mass and calculate volume

b)

Measure color under sunlight

c)

Record surface roughness values

d)

Perform X-ray diffraction analysis

30.

A quenched steel is too brittle for a spring. Which sequence improves toughness while maintaining useful hardness?

a)

Anneal then quench steel

b)

Normalize then cold roll

c)

Quench then temper steel

d)

Case harden then age

31.

When selecting a supply form for manufacturing, which factor is most relevant to reduce waste for casting aluminium?

a)

Order thick square bar stock

b)

Buy oversized steel plate

c)

Use extruded copper tubing

d)

Choose near-net-shaped casting

32.

Which best describes cold working in metals?

a)

Rapid quenching from austenite phase

b)

Heating above melting point for shaping

c)

Plastic deformation below recrystallisation temperature

d)

Diffusion-based alloying at high temperature

33.

During cold working, how does hardness typically change?

a)

Oscillates with cyclic loading

b)

Remains unchanged with strain

c)

Decreases due to grain growth

d)

Increases due to work hardening

34.

What is the primary microstructural reason for work hardening during cold working?

a)

Increased dislocation density and interactions

b)

Reduction in atomic mass of lattice

c)

Formation of vacancies by annealing

d)

Transformation to amorphous structure

35.

A metal has been heavily cold worked and shows reduced ductility. Which process restores ductility most effectively?

a)

Shot peening to induce compressive stress

b)

Further cold rolling at room temperature

c)

Annealing above recrystallisation temperature

d)

Surface carburising for case hardening

36.

Which statement about recrystallisation temperature is most accurate?

a)

Exact value identical for all pure metals

b)

Temperature that maximises thermal conductivity

c)

Point where elastic limit becomes infinite

d)

Temperature where new strain-free grains nucleate

37.

Which statement best distinguishes mechanical modification from thermal modification in materials engineering?

a)

Mechanical changes composition; thermal changes shape

b)

Mechanical alters dislocation density; thermal alters microstructure

c)

Mechanical improves conductivity; thermal increases magnetism

d)

Mechanical increases melting point; thermal lowers density

38.

Cold working typically produces which combined effect on a metal?

a)

Higher ductility and toughness, lower strength and hardness

b)

Higher strength and hardness, lower ductility and toughness

c)

Higher conductivity and density, lower melting point

d)

Higher magnetism and corrosion resistance, lower strength

39.

During mechanical modification, what primary mechanism increases strength?

a)

Phase transformation creates liquid phase

b)

Dislocation multiplication hinders slip

c)

Diffusion removes alloying elements

d)

Grain growth reduces boundaries

40.

Which processing route most likely restores ductility lost during cold work?

a)

Quenching from ambient temperature

b)

Solutionizing below recrystallization

c)

Annealing above recrystallization

d)

More cold rolling at room temperature

41.

A designer needs high hardness for a formed steel bracket. Which sequence is most appropriate?

a)

Cold work moderately then stress relieve

b)

Cold work heavily then anneal fully

c)

Anneal then cold work lightly

d)

Hot forge then age harden

42.

Which trade-off is most important when selecting mechanical versus thermal modification for cost efficiency?

a)

Mechanical creates magnetism; thermal removes iron

b)

Mechanical improves color; thermal enhances appearance

c)

Mechanical raises melting point; thermal reduces density

d)

Mechanical increases tooling wear; thermal increases energy use

43.

Which property pair correctly categorizes physical vs mechanical properties for materials selection?

a)

Toughness is physical; conductivity is mechanical

b)

Melting point is mechanical; ductility is physical

c)

Hardness and strength are mechanical; density is physical

d)

Density and color are mechanical; hardness is physical

44.

Which statement best describes the primary purpose of annealing in steels?

a)

Refine grain size and increase yield strength

b)

Create martensite and raise wear resistance

c)

Increase hardness and reduce toughness

d)

Reduce hardness and improve ductility

45.

During normalising of steel, what is the typical sequence of steps?

a)

Rapid quench from room temperature

b)

Cold work then temper at low heat

c)

Heat above critical, air cool freely

d)

Heat below critical, furnace cool slowly

46.

Compared to annealing, normalising most commonly results in which microstructural outcome?

a)

Graphitic structure without pearlite

b)

Fully martensitic structure

c)

Coarser grains with residual stresses

d)

Finer, more uniform pearlite

47.

Which condition would most likely require annealing rather than normalising?

a)

Improving cast steel’s uniform grain size

b)

Relieving cold-work strains in sheet metal

c)

Producing martensite for high wear parts

d)

Increasing through-hardness in tool steel

48.

A steel component is heated above the austenitising temperature and then allowed to cool in still air on a rack. What property change is most expected?

a)

Extreme softness with large grains

b)

Maximum hardness from martensite

c)

No change because temperature is low

d)

Improved strength with refined grains

49.

Which pairing correctly matches process to cooling method?

a)

Annealing—furnace cool slowly

b)

Tempering—air cool from cold

c)

Hardening—cool inside furnace

d)

Normalising—quench in brine

50.

Which property best matches the image of multiple thin metal strands being pulled apart into long filaments?

a)

Hardness resisting surface indentation under load

b)

Ductility enabling elongation into continuous wires

c)

Toughness absorbing energy before fracturing

d)

Malleability forming broad flat metal sheets

51.

A manufacturer needs copper conductors for electrical wiring. Which heat treatment is most appropriate before drawing to balance softness and formability?

a)

Tempering to slightly reduce brittleness

b)

Quenching to increase martensitic hardness

c)

Annealing to reduce hardness and improve ductility

d)

Normalizing to refine grain without softening

52.

Which statement correctly distinguishes malleability from ductility when shaping metals?

a)

Malleability relates to forming sheets; ductility to forming wires

b)

Both describe energy absorption during impact

c)

Malleability relates to forming wires; ductility to forming sheets

d)

Both describe hardness increase during quench

53.

For producing thin aluminum foil from an ingot, which process-property combination is most suitable?

a)

Cold quench increasing hardness for rolling

b)

Surface hardening improving wear during forging

c)

Austempering improving toughness for wire drawing

d)

Full anneal increasing malleability for sheet forming

54.

Which step immediately follows heating steel to its austenitizing temperature during hardening?

a)

Quenching in water or oil

b)

Tempering at low temperature

c)

Normalizing in still air

d)

Air cooling to room temperature

55.

What is the primary purpose of quenching in the hardening process?

a)

Increase ductility of the steel

b)

Form hard martensitic structure

c)

Remove residual stresses only

d)

Improve corrosion resistance

56.

Tempering is performed after quenching mainly to achieve which outcome?

a)

Reduce hardness dramatically

b)

Increase brittleness significantly

c)

Eliminate grain boundaries completely

d)

Balance hardness with toughness

57.

For a thin, high-carbon steel blade, which quenching medium is most likely to reduce the risk of cracking while still achieving hardening?

a)

Forced air with a fan

b)

Warm oil with slower cooling

c)

Ice water at near freezing

d)

Brine solution with high salinity

58.

Which statement best describes the hardness–toughness relationship after tempering?

a)

Toughness increases with some hardness reduction

b)

Both hardness and toughness sharply increase

c)

Neither hardness nor toughness changes

d)

Hardness increases while toughness decreases

59.

A gear is quenched too rapidly and becomes very brittle. What adjustment most directly improves its service performance?

a)

Skip tempering completely

b)

Reheat and temper appropriately

c)

Polish the surface finish

d)

Anneal then leave unquenched

60.

Which process sequence correctly represents hardening and tempering of steel?

a)

Heat, temper, quench, normalize

b)

Heat, quench, temper, cool

c)

Quench, heat, temper, forge

d)

Normalize, temper, quench, heat

61.

Looking at the racing car image of impact-prone components, which property is most important for parts like bumpers after heat treatment?

a)

Extreme surface roughness

b)

Maximized corrosion resistance

c)

High electrical conductivity

d)

Adequate toughness with hardness