Chapter 2

Question 1

True or False:

Steels and cast irons can also contain other alloying elements besides carbon

Answer 1

True

Question 2

Occurs with high friction or speed.

Answer 2

surface cracking

Question 3

True or False:

Metals conduct heat better than ceramics or polymers

Answer 3

True

Question 4

The pure properties of this alloy are ductile, malleable,good electrical / thermal conductor and very soft

Answer 4

copper alloys

Question 5

Special grades of alloy steels used for a variety of tooling, with very close control of the alloying element additions

Answer 5

tool steels

Question 6

___ refers to heating and soaking metal at suitable temperature for a certain time, and slowly cooling

Answer 6

Annealing

Question 7

Cross section of a round rod / wire is reduced by pulling it through a die.

Answer 7

drawing

Question 8

Deformation that occurs under constant temperature

Answer 8

Isothermal forming

Question 9

___ is the resistance to sliding along an interface

Answer 9

Friction

Question 10

Also called noble metals because chemically inert

Answer 10

precious metals

Question 11

Starting form of casting

Answer 11

cast

Question 12

It is so-called for having high-performance alloys for strength and resistance to surface degradation at high service temperatures

Answer 12

superalloys

Question 13

Remarkable metal for it has the highest melting point among metals, one of the densest, also the stiffest (highest modulus of elasticity) and hardest of all pure metals

Answer 13

tungsten

Question 14

Plastic deformation below the recrystallization temperature

Answer 14

cold working

Question 15

A hollow ram pushes the die back through a stationary, confined billet

Answer 15

indirect extrusion

Question 16

True or False:

The usage of lubricants in metal forming can decrease the force or power requirements

Answer 16

True

Question 17

True or False:

Wrought metal is the metal that has been worked or can be worked before casting

Answer 17

False

Question 18

Heated billet is fed into the gap between two large, convex-tapered rolls and forces the billet to deform into a rotating ellipse

Answer 18

piercing

Question 19

Primarily selected to reduce friction and tool wear, but may be used as a thermal barrier, coolant, or corrosion retardant

Answer 19

lubrication

Question 20

___ is a mixture or compound of two or more elements, at least one of which is metallic.

Answer 20

Alloy

Question 21

High-pressure fluid surrounds the workpiece and applies the force to execute extrusion

Answer 21

hydrostatic extrusion

Question 22

True or False:

Heat treating is done to enhance properties of metals

Answer 22

True

Question 23

Large increase in hardenability with very small addition of element

Answer 23

boron

Question 24

True or False:

In cold working, heavier and more powerful equipment and stronger tooling are required

Answer 24

True

Question 25

It can predict how a material will respond to a rolling process, fill a forging die, flow through an extrusion die, or solidify in a casting

Answer 25

models

Question 26

Metals capable of enduring high temperatures - maintaining high strength and hardness at elevated temperatures

Answer 26

refractory metals

Question 27

True or False:

Tin-lead alloys melt at lower temperatures that’s why it is considered to be in eutectic composition

Answer 27

True

Question 28

High strength aircraft structures

Answer 28

aluminum alloys

Question 29

True or False:

Ferrous, non ferrous and alloys are the classification of metals

Answer 29

False

Question 30

Designated as cold when combined with other forging operations. This is also called as impact extrusion

Answer 30

Cold extrusion

Question 31

True or False:

Steel and cast iron belong to non ferrous metals

Answer 31

False

Question 32

True or False:

Force or power requirements belongs to dependent variables in metal forming

Answer 32

True

Question 33

The phase at room temperature is alpha called

Answer 33

ferrite

Question 34

True or False:

In metals, as the carbon content increases, the tensile strength also increases.

Answer 34

True

Question 35

Metals whose major element is not Iron

Answer 35

Non – ferrous metals

Question 36

It is similar to heating and soaking cycle as in full annealing, but faster cooling rates.

Answer 36

Normalizing

Question 37

The pure metal properties of this alloy are lightweight,strong (per unit volume) and flammable in fine sizes

Answer 37

magnesium alloys

Question 38

Plastic deformation of metals at a temperature above the recrystallization temperature

Answer 38

hot working

Question 39

Metal is compressed and forced to flow through a shaped die to form a product with a constant cross section

Answer 39

extrusion

Question 40

True or False:

Most engineering applications require the enhanced properties obtained by alloying

Answer 40

True

Question 41

True or False:

In metals, as the carbon content increases, the percentage of elongation also increases.

Answer 41

False

Question 42

capacity to absorb energy better than other classes of materials

Answer 42

toughness

Question 43

Deformations produced at temperatures intermediate to cold and hot working

Answer 43

warm working

Question 44

It is the ability of a material to flow as a solid without deterioration of properties

Answer 44

plasticity

Question 45

It is used to describe it because its chemical composition is intermediate between two phases

Answer 45

intermediate phase