Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

chapter 3 > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

Grain growth can be retarded by the use of which of the following methods? (Multiple Choice)
Question options:

A) Using small amounts of micro alloying elements such as zirconium or titanium

B) Retarding cooling in the ferrite range by use of stepped cooling in a furnace

C) Holding at high temperatures in the austenitizing range, cool, and furnace cool

D) Add gases such as oxygen and carbon dioxide to the melt and slow coo

A

A) Using small amounts of micro alloying elements such as zirconium or titanium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The ductility measured through the thickness of the plate is usually the lowest of all. The welding of large heavily restraint tee joints may therefore result in: (Multiple Choice)
Question options:

A) ductile tearing.

B) lamellar tearing.

C) hydrogen tearing.

D) brittle tearing.

A

B) lamellar tearing.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

There are several metallurgical phases in a steel depending on its carbon content and heating history. How is ferrite best described? (Multiple Choice)
Question options:

A) A complex phase that occurs above 723 °C

B) A phase that depends on fulfilling its structure by fast cooling

C) A solid solution in a face-centered cubic (FCC) phase of iron that dissolves only small amounts of carbon

D) A solid solution in a body-centred cubic (BCC) phase of iron that dissolves very small amounts of carbon

A

A) A complex phase that occurs above 723 °C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a prime requirement when purchasing steel? (Multiple Choice)
Question options:

A) No requirement

B) The thickness

C) The physical properties

D) The steel specifications

A

D) The steel specifications

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which one of the following elements influences the shifting of lines in the phase diagram of steel to a point where steel becomes 100% austenite? (Multiple Choice)
Question options:

A) Nickel

B) Silicon and oxygen

C) Chromium and sulphur

D) Carbon

A

A) Nickel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Grain boundaries are the regions where atoms are in perfect order. (True/False)
Question options:
True
False

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Two examples of grain refining elements are: (Multiple Choice)
Question options:

A) aluminum and vanadium.

B) oxygen and aluminum.

C) vanadium and oxygen.

D) carbon and aluminum.

A

A) aluminum and vanadium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is taconite? (Multiple Choice)
Question options:

A) it is coke

B) it is iron ore

C) it is cast iron

D) it is cementite

A

B) it is iron ore

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The best elements in a drill bit in order to maintain resistance to tempering should be: (Multiple Choice)
Question options:

A) carbon and silicon.

B) chromium and tungsten.

C) nickel and cobalt.

D) vanadium and nickel.

A

B) chromium and tungsten.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A typical temperature for thermal stress relief treatment of welded fabrication is in the region of: (Multiple Choice)
Question options:

A) 225 °C

B) 425 °C

C) 625 °C

D) 825 °C

A

C) 625 °C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Resistance to tempering is a term that describes a material’s ability to retain: (Multiple Choice)
Question options:

A) ductility at high temperature.

B) hardness at high temperature.

C) chemical composition at high temperature.

D) grain structure at high temperature.

A

B) hardness at high temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

If more than 0.8% carbon is added to iron: (Multiple Choice)
Question options:

A) the resulting steel can no longer be forged.

B) the resulting material is called cast iron.

C) the resulting material will contain cementite and pearlite.

D) the resulting material will contain martensite and pearlite.

A

C) the resulting material will contain cementite and pearlite.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What can occur in large heavily restrained T-joints if a steel has poor ductility in the through-thickness direction? (Multiple Choice)
Question options:

A) Hot cracking in a lamellar mode and associated with the heat-affected zone microstructure

B) Tearing of the plate at the fusion line in a lamellar mode

C) Hydrogen assisted cold cracking in the weld

D) Lamellar tearing occurring in the parent plate

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which elements are added to molten steel specifically for deoxidation purposes? (Multiple Choice)
Question options:

A) Manganese and oxygen

B) Silicon and oxygen

C) Manganese and aluminum

D) Carbon and manganese

A

B) Silicon and oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How is the yield point phenomenon explained? (Multiple Choice)
Question options:

A) The natural resistance of metals to external force

B) Dislocations are pinned by interstitial atoms

C) The displacement of atoms

D) None of the above

A

A) The natural resistance of metals to external force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Why are silicon and/or aluminum added to steel? (Multiple Choice)
Question options:

A) They are added to increase the carbon content

B) They are added to increase the grain size of the steel

C) They are added to remove dissolved oxygen

D) They are added to reduce the toughness of steel

A

C) They are added to remove dissolved oxygen

17
Q

Elements commonly used to form substitutional solid solutions include: (Multiple Choice)
Question options:

A) nitrogen.

B) carbon.

C) copper.

D) oxygen.

A

B) carbon.

18
Q

When a pressure vessel is made from formed plates, they are usually arranged: (Multiple Choice)
Question options:

A) with the rolling direction around the circumference.

B) with the rolling direction in a pattern alternating between around the circumference and along the length of the pipe.

C) with the rolling direction along the length of the pipe.

D) randomly.

A

A) with the rolling direction around the circumference.

19
Q

The first step in converting iron ore into steel is the production of pig iron in the: (Multiple Choice)
Question options:

A) iron furnace.

B) smelt furnace.

C) electric furnace.

D) blast furnace.

A

D) blast furnace.

20
Q

If more than 1.7% carbon is added to iron: (Multiple Choice)
Question options:

A) the resulting steel can no longer be forged.

B) the resulting material is called cast iron.

C) the resulting material will contain cementite and pearlite.

D) the resulting material will contain martensite and pearlite.

A

B) the resulting material is called cast iron.

21
Q

When designing a steel to improve its hardenability and thus its strength, what is the normal approach? (Multiple Choice)
Question options:

A) Increase the grain size of the steel

B) Use a heat treatment that is guided by the mill followed by a stress relief.

C) Use a small amount of several hardening elements as the effect is better than using a single element

D) Use a single element such as carbon which has great hardenability and improves the weldability of the steel

A

C) Use a small amount of several hardening elements as the effect is better than using a single element

22
Q

What are the three main components when charging a blast furnace? (Multiple Choice)
Question options:

A) Iron ore, nickel pellets, and limestone.

B) Iron ore, manganese ore, and coke

C) Iron ore, limestone, and coke

D) Iron ore, nickel pellets, and coke

A

C) Iron ore, limestone, and coke

23
Q

Iron can change its crystallographic form as temperature changes. What form does iron take at a temperature of 250 degrees Celcius? (Multiple Choice)
Question options:

A) The body-centered cubic ferrite lattice form

B) The face-centered cubic austenite lattice form

C) The close-packed hexagonal delta lattice form

D) The distorted lattice form known as pearlite

A
24
Q

Iron can change its crystallographic form as temperature changes. What form does iron take at a temperature of 250 degrees Celcius? (Multiple Choice)
Question options:

A) The body-centered cubic ferrite lattice form

B) The face-centered cubic austenite lattice form

C) The close-packed hexagonal delta lattice form

D) The distorted lattice form known as pearlite

5.2

A

A) The body-centered cubic ferrite lattice form

25
Q

What is the maximum solubility of carbon in austenite and above which a steel becomes cast iron? (Multiple Choice)
Question options:

A) The maximum solubility of carbon in austenite is 17.0%

B) The maximum solubility of carbon in austenite is 0.80%

C) The maximum solubility of carbon in austenite is 0.3%%

D) The maximum solubility of carbon in austenite is 1.7%

A

D) The maximum solubility of carbon in austenite is 1.7%

26
Q

The formation of a martensitic structure can be assisted by which of the following techniques? (Multiple Choice)
Question options:

A) Providing a slower cooling rate once the steel has entered the ferrite range

B) Adding alloying elements to the steel such as chromium

C) Reducing the carbon content helps drive the formation of martensite

D) Adding gases to the melt prior to cooling, such as oxygen

A

B) Adding alloying elements to the steel such as chromium

27
Q

Examination of a steel bar that has been deformed in tensile loading will reveal many bands on the surface. What does this indicate? (Multiple Choice)
Question options:

A) Elastic deformation has occurred by a process known as slip

B) Deformation has occurred by a process known as banding of dislocations

C) That dislocation density increased significantly in the elastic portion of deformation

D) That plastic deformation has occurred by a process known as slip

A

D) That plastic deformation has occurred by a process known as slip

28
Q

Increases in carbon content can affect the properties of steel in which of the following areas? (Multiple Choice)
Question options:

A) The tensile strength increases but the ductility and weldability decrease

B) The ductility and weldability increase and the strength reduces marginally

C) The weldability, toughness, and hardness all decrease

D) The hardness decreases and the strength and weldability increase

A

A) The tensile strength increases but the ductility and weldability decrease

29
Q

The carbon content for quenched and tempered steels used for earth moving and mining equipment will be: (Multiple Choice)
Question options:

A) 0.2% C max

B) 0.5% C max

C) 0.8% C max

D) 1.2% C max

A

A) 0.2% C max

30
Q

Which of the following steels will require the most stringent control of the welding procedure? (Multiple Choice)
Question options:

A) 400W

B) 350WT

C) 700Q

D) 230G

A
31
Q

Ferrite is the phase that at room temperature: (Multiple Choice)
Question options:

A) contains almost no carbon.

B) contains almost all the austenite in the steel.

C) contains almost all the carbon in the steel.

D) contains almost all the graphite in the steel.

A

A) contains almost no carbon.

32
Q

What is coke? (Multiple Choice)
Question options:

A) Another name for coal

B) A residue distillation of coal

C) An element in the periodic table

D) Cementite

A

B) A residue distillation of coal

33
Q
A

chapter 3 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions