Materials 1 to 3

Select the most important group of properties for a smartphone screen protector.

density, modulus, strength

chemical inertness, formability, price,

thermal conductivity, impact resistance, high temperature strength

scratch resistance, optical quality transmittance, formability

Select the most important group of properties for the inspection window in a kiln for firing ceramics.

compressive strength, corrosion resistance, modulus

scratch resistance, optical quality transmittance, formability

thermal diffusivity, strength, formability

chemical inertness, formability, price

thermal conductivity, impact resistance, high temperature strength

density, modulus, strength

Select the most important group of properties for an automotive heat exchanger.

compressive strength, corrosion resistance, modulus

chemical inertness, formability, price

thermal diffusivity, strength, formability

density, modulus, strength

thermal conductivity, impact resistance, high temperature strength

scratch resistance, optical quality transmittance, formability

Select the most important group of properties for the poles used in scaffolding on buildings.

thermal conductivity, impact resistance, high temperature strength

density, modulus, strength

chemical inertness, formability, price

compressive strength, corrosion resistance, modulus

scratch resistance, optical quality transmittance, formability

thermal diffusivity, strength, formability

Select the most important group of properties for the wrist-strap of a sports watch.

thermal conductivity, impact resistance, high temperature strength

chemical inertness, formability, price

scratch resistance, optical quality transmittance, formability

compressive strength, corrosion resistance, modulus

density, modulus, strength

thermal diffusivity, strength, formability

Select the most important group of properties for the ramp which cars drive down from a multi-storey car park.

compressive strength, corrosion resistance, modulus

thermal conductivity, impact resistance, high temperature strength

thermal diffusivity, strength, formability

scratch resistance, optical quality transmittance, formability

Which of these statements about metals is true?

FCC metals are the most brittle.

Metals and ceramics are both usually brittle.

Metal crystal structures have no influence on mechanical properties.

Metals are usually good conductors of both heat and electricity.

Metals have lower Young's modulus values than polymers.

Which of the following statements is true about polymers?

Polymer crystallites are based on close-packed planes of atoms.

Polymers conduct electricity well.

Polymers melt at higher temperatures than most metals.

Polymers may be amorphous or semi-crystalline

Polymer components can only be manufactured in the solid state.

Which of the following statements is true about the structure of ceramics?

Silicon carbide and tungsten carbide are hard because of their amorphous, non-crystalline structure.

The form crystals with more than one ion type.

The ionic bonding makes ceramics electrically conducting.

Ceramics usually melt at higher temperatures than polymers but lower than metals.

The ions which form ceramic crystals are always the same size.

Which of the following is true about polymorphism?

Carbon is a shape-memory material.

Carbon shows polymorphism with different forms at different temperatures and pressures.

Carbon structures are always amorphous.

Which of the following is true about recoverable, elastic behaviour?

Shear modulus and Young's modulus are typically both about half the bulk modulus.

Poisson's ratio is a maximum of 0.3

Poisson's ratio is an elastic constant only for polymers like rubber.

Modulus values do not depend on the dimensions of a component.

Which of these statements is true about the design process?

Processing considerations are not part of materials selection.

Design concept developments always come last once materials are selected.

Design concepts are developed to address needs before detailed design.

Materials selection always needs a choice of metals, ceramics or polymers to be made first.

Design concept developments always come last once materials are selected.

Which of these statements is true about materials selection?

Materials indices of more than one property are always needed in materials selection.

Translation of needs into requirements can enable initial screening of materials for a particular objective.

Ranking of materials takes place before screening.

Screening always needs a plot with a materials index on a plot of more than one materials property.

Screening of materials can take place before objectives are set.

Which of these statements is true about how materials indices are created?

Constraints are a result of the materials index selection.

Objectives of the design are optional and used only if they help.

The problem is expressed as functional requirements, geometrical requirements and materials properties.tionall requirements,

Materials indices are usually expressed to be minimised.

Constraints are what makes the design possible not what limits it.

Which of these statements is true about materials indices?

The index to be maximised is expressed as an equation to plot a straight line on the graph of two materials properties.

The materials index plot must only be at one location on the property graph.

For a particular index the intercept but not the gradient are constant.

A materials index will only suggest materials of equal properties.

Materials indices are usually plotted as non-linear curves.

Which of these statements is true about materials indices?

The materials index line expresses the maximum values possible.

A materials index can lead to lines of different gradient.

If the index line is plotted with a positive gradient all materials to the top left above the line are better.

The line cannot be moved on the graph even if it only suggests a few materials.

No other factors are allowed for final selection.

Which of the following statements is true about the materials index of a panel which is E1/3/density?

Parallel lines of the same slope are not allowed with materials indices.

This index can lead to plots with gradient 1/3

The index can be rearranged to give a line of slope 3 on a modulus density graph.

This index can lead to plots with gradient 1 or 2 or 3 according to choice.

The loading conditions for a beam produce the same result.

Which of these statements is true about multiple objectives?

The problem must be solved analytically.

Trade-off lines can sometimes be drawn between different requirements.

Materials selection is not possible with multiple objectives.

One objective is always found to be not necessary.

There must be a mistake in the problem set-up.

Which of these statements is true about shape factors?

Each shape has a shape factor which also varies with dimensions.

They allow for different shapes such as tubes or I-beams with similar stiffness or weight.

They apply better in tension than in bending.

Which of the following statements is true?

Some materials depend on time and temperature and stress and strain are only linear at very small deflections.

Poisson's ratio does not apply when materials obey Hooke's Law.

Rate of strain does not affect the stress strain response of materials.

All materials are linear elastic until yielding or fracture.

Elastic constants cannot be defined if the material is non-linear.

Unlock and Upgrade

Remove all limits from your Quizzes

Materials 1 to 3

More Quizzes