Metals

Question 1

What study?

Nature, behavior, and use of materials; relationships that exist between the structures and properties; interdisciplinary field

Answer 1

Material Science

Question 2

Characteristics of Metals

Answer 2

1. Stiff and strong
2. Resistant fracture
3. Not transparent
4. Lustrous
5. Some has magnetic properties

Question 3

The structure of a material usually relates to the arrangement of its internal components

Answer 3

Structure

Question 4

Alloy of brass

Answer 4

copper and zinc

Question 5

Alloy of bronze

Answer 5

copper and tin

Question 6

Alloy of stainless steel

Answer 6

iron, chromium, nickel

Question 7

Material trait in terms of the kind and magnitude of response to a specific imposed stimulus

Answer 7

Property

Question 8

Traditional process for making metallic components begin with melting of the metal or alloy

Answer 8

Casting

Question 9

Materials that have a large number of non-localized electrons; strong yet deformable

Answer 9

Metals

Question 10

Fundamental classes of materials

Answer 10

1. Metallic
2. Ceramic
3. Polymeric

Question 11

5 Major Classes of Materials

Answer 11

1. Metals
2. Ceramics
3. Polymers
4. Composites
5. Advanced materials

Question 12

Composed of one or more metallic elements, with small amount of nonmetallic elements

Answer 12

Metals

Question 13

From fundamental classes of Materials,

which materials are the most ordered and dense?

Answer 13

Metals

Question 14

Yes of No?

Are metals opaque materials?

Answer 14

Yes

Question 15

Metallic elements that are highly resistant to heat and wear

Answer 15

Refractory metals

Question 16

Stringent point for refractory metal

Answer 16

MP > 2000°C
MP 1850-2000°C

Question 17

Forms of Magnet

Weakly attracted to magnetic field

Answer 17

Paramagnetic

Question 18

Forms of Magnetic

Repelled to magnetic field due to presence of paired electrons

Answer 18

Diamagnetic

all paired electrons in valence shell

Question 19

Forms of Magnetic

Behaves like iron when placed in a magnetic field

Answer 19

Ferromagnetic

Question 20

Element used for the production of modern super strong permanent magnets

Answer 20

Neodynium

Question 21

Alloy alnico means?

Answer 21

Aluminum, Nickel, Cobalt

Question 22

Alloyed with steel to give a resistance to corrosion

Answer 22

Chromium

Question 23

Liquid or solid?

Which state of matter has a lower boiling points?

Answer 23

Liquid

PHB Table 2-1

like Hg as it’s liquid at room temperature

Question 24

Metal that has the highest electrical conductivity

Answer 24

Silver

Question 25

Which of the following is true about refractory metals: Resistant to * oxidation * corrosion * heat * sun's rays

Answer 25

heat

Question 26

# High or low MP? Melting point of metal

Answer 26

Low MP | Ceramics have relative higher MP

Question 27

Most used metal in the world

Answer 27

Steel

Question 28

Metal that has maximum ductility

Answer 28

Copper

Question 29

Added in low carbon steels to prevent them from becoming porous

Answer 29

Silicon

Question 30

Raises yield point for low carbon steels and improves the resistance to atmospheric corrosion

Answer 30

Phosphorous

Question 31

Impurity in cast iron which makes it hard and brittle

Answer 31

Sulphur

Question 32

What does vanadium do to tensile sterength when added to steel?

Answer 32

increases tensile strength

Question 33

# High or low Refractory metals have ____ thermal coefficient of expansion.

Answer 33

low

Question 34

Chromite is a *basic/acidic/neutral* refractory?

Answer 34

neutral