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Material Science - Midterm > Chapter 1 > Flashcards

Chapter 1 Flashcards

1
Q

Losing an electron makes it electropositive (positive ion)

True or False?

A

True

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2
Q

_________________ alter a material’s properties in a controlled manner to produce components of products.

A

Manufacturing Processes

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3
Q

Helium has greater ionization energy than Hydrogen.

True or False?

A

True

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4
Q

Polymeric materials that are formed into a variety of three-dimensional shapes; large molecules (bulky) ; molecules are not compact (low density) ; polymers are flexible

A

Plastics

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5
Q

Production is performed on a start-and- stop basis, such as for the manufacture of made-to-order products.

A

Intermittent Production System

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6
Q

It has an electrical conductivity value falling between that of a conductor and an insulator.

A

Semiconductors

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7
Q

The process of extrusion belongs to what category of shaping process

A

Deformation Process

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8
Q

Starting material is used and no subsequent machining is required to achieve final part geometry

A

Net shape Processes

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9
Q

Strength, toughness, ductility, hardness, elasticity, fatigue, and creep belong to what property ?

A

Mechanical properties

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10
Q

It is the property of a material that shows little or no plastic deformation before fracture when a force is applied.

A

brittleness

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11
Q

Type of bonding in which electrons are shared between atoms in their outmost shell to become stable.

A

Covalent

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12
Q

atoms are located at regular and recurring positions in three dimension

A

Crystalline Structures

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13
Q

In _________ bonding , there is sharing of outer shell electrons by all atoms to form a general electron cloud that permeates the entire block

A

Metallic

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14
Q

Such materials which only melt a very high temperatures are called _____ materials.

A

fusibility

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15
Q

Sodium has larger atomic radius than hydrogen

True or False?

A

True

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16
Q

Strength is the ability of a material to resist applied forces without fracturing.
True or False?

A

True

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17
Q

_____ is defined as the gradual extension of a material over a long period of time whilst the applied load is kept constant.

A

Creep

18
Q

The resistance of magnetic circuit is referred to as

A

Reluctance

19
Q

Surface processing that refers to mechanical working such as sand blasting, and physical processes like diffusion

A

Surface Treatments

20
Q

This is the ease with which materials will melt.

A

Fusibility

21
Q

Medium production quantity ranges

A

100 to 10,000 units

22
Q

These includes such properties as density, and the properties displayed when a force is applied to a material, e.g. yield strength, strength, stiffness,hardness, toughness

A

Mechanical properties

23
Q

Examples of this classification of industry are banking, education, government, legal services, retail trade, transportation

A

Tertiary industries

24
Q

Density, Thermal expansion, conductivity, specific heat, melting point, and electrical and magnetic properties are under _____ property

A

Physical

25
Q

Low strength and high resistance to corrosion

A

Non-Ferrous Matals

26
Q

It combines high production volume with high product variety.

A

Mass Customization

27
Q

The good magnetic conductors have low reluctance

True or false?

A

True

28
Q

Gaining an electron (negative ion) – electropositive

True or false?

A

False

29
Q

groups of atoms that are normally agglomerated together

A

Microscopic

30
Q

The resistance of magnetic circuit is referred to as

A

Reluctance

31
Q

It is the ability of a material to deform under load and return to its original size and shape when the load is removed.

A

Elasticity

32
Q

metals and alloys containing a high proportion of the element iron.

A

Ferrous metals

33
Q

starting material is a ductile/brittle solid, from which material is removed

A

Material Removal Processes

34
Q

Basic structural unit of matter

A

Atoms

35
Q

It is the ability of a material to withstand scratching (abrasion) or indentation by another hard body

A

Hardness

36
Q

These are, for example, relevant in considerations of abrasion and wear,
corrosion and solvent resistance

A

Surface Properties

37
Q

strongest materials available and are used for applications where high strength is required at relatively low cost and where weight is not of primary importance.

A

Ferrous metals

38
Q

Classification of industry that cultivates and exploits natural resources

A

Primary Industries

39
Q

It is the state of a material which has been loaded beyond its elastic limit so as to cause the material to deform permanently.

A

Plasticity

40
Q

starting material is a heated liquid that solidifies to form part geometry

A

Solidification Processes

Material Science - Midterm (4 decks)

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