Metallurgy

Question 1

Define ductility:

Answer 1

The ability to deform or stretch without fracture under tension

Question 2

Define malleability:

Answer 2

The ability to deform under compressive forces

Question 3

What is the rate at which heat is conducted through a material?

Answer 3

Thermal conductivity

Question 4

High alloy steels have alloying elements of _________ or higher?

Answer 4

10%

Question 5

Which type of stainless steel contains the lowest level of chromium?

Answer 5

Martensitic stainless steel

Question 6

Which lattice structure shape does iron have at room temperature?

Answer 6

BCC

Question 7

Which lattice structure shape does aluminum have?

Answer 7

FCC

Question 8

When performing heat treat, which provides a finer grain structure?

Answer 8

Normalizing

Question 9

When performing heat treat, which process does not refine the grain structure?
A) annealing
B) normalizing
C) stress relieving
D) quenching and tempering

Answer 9

C) stress relieving

Question 10

Quenching is used to achieve a higher toughness.
True or false

Answer 10

Falsd

Question 11

What is the difference between annealing and normalizing?

Answer 11

Normalized material is air cooled

Question 12

What is stress relieving?

Answer 12

Equalization and stabilization of any residual stresses without any refinement of the grain structure.

Question 13

How many classifications of steel types are covered by CSA G40.21?

Answer 13

Seven

Question 14

Which organization is a professional society of engineers in the field of ground, air and space transportation?

Answer 14

SAE

Question 15

Which organization is an association of steel producers that issues steel specifications and co operates with SAE in using the same numbering system?

Answer 15

AISI

Question 16

Which organization is a professional society of mechanical engineers that issues codes for boilers and pressure vessels?

Answer 16

ASME

Question 17

CSA standards cover materials used for pressure equipment.
True or False

Answer 17

False

Question 18

Under the SAE and AISI systems, each steel is given a four- digit numerical index that relates to its composition. Which digit indicates the sub-class (which is often the percentage of major alloying element)?

Answer 18

The second digit

Question 19

What are the challenges when trying to identify materials using a colour coding method?

Answer 19

There can be loss of the marking from damage and marking systems are not standardized.

Question 20

An MTR includes material colour coding information.
True or false

Answer 20

False

Question 21

What indicates that a steel has been hot rolled?

Answer 21

Black mill scale

Question 22

Which two metals have a white fracture surface?

Answer 22

Aluminum and lead

Question 23

What cast irons have a melting point of 1260•C?

Answer 23

Grey, white, malleable

Question 24

What metal distorts when heat is applied?

Answer 24

Magnésium

Question 25

What metal has a light straw colour when oxidized?

Answer 25

Titanium

Question 26

Which metal is magnetic and has a 1500•C melting point?

Answer 26

Steel

Question 27

During a spark test, __________ produce orange lines, ending in pear shaped globules. There is very little branching and there are few carbon bursts.

Answer 27

High speed or cutting steels

Question 28

What type of test is important for helping to identify a metals susceptibility to hydrogen cracking?

Answer 28

A hardness test

Question 29

In the basic oxygen furnace, what does the term basic refer to?

Answer 29

The chemical nature of the refractory lining of the furnace

Question 30

Wire, certain grades of pipe, and some machining steels can be produced by the ___________ process.

Answer 30

Bessemer converter

Question 31

The highest quality of steel is produced through the use of a what?

Answer 31

Electric furnace

Question 32

What type of furnace is made of bricks and burns by heating gas?

Answer 32

Open hearth furnace

Question 33

What type of furnace blows oxygen into Liquid Metal?

Answer 33

Basic oxygen furnace

Question 34

What type of furnace produces the highest quality of steel?

Answer 34

Electric furnace

Question 35

What furnace has high production rates at lower costs?

Answer 35

Bessemer converter

Question 36

What type of steel ingot process offers an excellent rolled surface finish?

Answer 36

Rimmed steel

Question 37

Steels either a carbon content greater than _____% will originate from fully killed steels?

Answer 37

0.3%

Question 38

What type of steel is similar to rimmed steel with less segregation of impurities?

Answer 38

Capped steel

Question 39

Which type of steel may be susceptible to lamination issues after rolling?

Answer 39

Killed steel

Question 40

What type of finished product is a billet considered to be?

Answer 40

Semi finished

Question 41

Pre-coated steels cannot be coated with paint. True or false

Answer 41

False

Question 42

Cold-rolled material is typically worked below the material’s __________ temperature range.

Answer 42

Recrystallized

Question 43

What type of pipe is formed in ‘U’ shaped presses?

Answer 43

Large diameter

Question 44

What type of pipe is formed using rollers and a piercing mandrel?

Answer 44

Seamless pipe

Question 45

What type of pipe is welded with the ERW process?

Answer 45

Seamed pipe

Question 46

What type of casting process requires a high volume of production to make the process economical?

Answer 46

Die casting

Question 47

Which casting process offers a smooth surface finish?

Answer 47

Die casting