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MMET 207 > Exam II > Flashcards

Exam II Flashcards

(69 cards)

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1
Q

What is corrosion?

A

Corrosion is the degradation of materials, usually metals, due to chemical reactions with their environment.

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2
Q

True or False: Corrosion can only occur in metals.

A

False

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3
Q

What is the primary cause of rusting in iron?

A

The primary cause of rusting in iron is the reaction with oxygen and moisture.

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4
Q

Fill in the blank: The process of applying heat to steel to alter its properties is known as _______.

A

heat treating

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5
Q

What is the main purpose of heat treating steel?

A

The main purpose of heat treating steel is to improve its hardness, strength, and ductility.

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6
Q

What are carbon steels primarily composed of?

A

Carbon steels are primarily composed of iron and carbon.

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7
Q

Multiple Choice: Which element is NOT commonly found in alloy steels? A) Carbon B) Manganese C) Lead D) Chromium

A

C) Lead

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8
Q

What is the difference between carbon steel and alloy steel?

A

Alloy steel contains additional alloying elements, while carbon steel mainly consists of iron and carbon.

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9
Q

True or False: Tool steels are designed to withstand high temperatures and maintain their hardness.

A

True

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10
Q

Name one common application of tool steel.

A

One common application of tool steel is in the manufacturing of cutting tools.

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11
Q

What does the term ‘heat treatment’ refer to?

A

Heat treatment refers to a controlled process of heating and cooling metals to alter their physical and sometimes chemical properties.

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12
Q

Fill in the blank: Stainless steel is a type of _______ steel that contains chromium.

A

alloy

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13
Q

What is the primary function of alloying elements in steel?

A

Alloying elements improve properties such as strength, toughness, and corrosion resistance.

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14
Q

What type of heat treatment is used to increase hardness?

A

Quenching

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15
Q

Multiple Choice: Which of the following is a common alloying element in tool steels? A) Nickel B) Gold C) Zinc D) Sodium

A

A) Nickel

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16
Q

What is the carbon content range for low carbon steel?

A

Low carbon steel typically has a carbon content of 0.05% to 0.25%.

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17
Q

True or False: Galvanizing is a method to prevent corrosion.

A

True

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18
Q

What is the role of manganese in steel?

A

Manganese improves the strength, toughness, and hardenability of steel.

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19
Q

Fill in the blank: The process of slowly heating steel to a specific temperature and then cooling it is called _______.

A

tempering

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20
Q

What is the effect of carbon content on steel hardness?

A

Higher carbon content increases the hardness of steel.

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21
Q

What is the purpose of annealing steel?

A

The purpose of annealing steel is to relieve internal stresses and improve ductility.

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22
Q

Multiple Choice: Which type of steel is known for its high wear resistance? A) Mild Steel B) Tool Steel C) Stainless Steel D) Cast Iron

A

B) Tool Steel

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23
Q

What is the main characteristic of stainless steel?

A

Stainless steel is resistant to corrosion due to its chromium content.

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24
Q

True or False: All steels are magnetic.

A

False

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25
What is a common method to protect steel from corrosion?
A common method to protect steel from corrosion is painting or coating.
26
Fill in the blank: The term for the process of removing surface layers from metals is called _______.
pickling
27
What is the significance of the Rockwell hardness test?
The Rockwell hardness test measures the hardness of metals and alloys.
28
What is the typical carbon content in high carbon steel?
High carbon steel typically has a carbon content of 0.60% to 1.00%.
29
Multiple Choice: Which type of heat treatment involves heating the material to a temperature above its critical point? A) Quenching B) Annealing C) Normalizing D) Tempering
C) Normalizing
30
What property does chromium add to steel?
Chromium adds corrosion resistance and increases hardness.
31
True or False: Alloy steels can be tailored for specific applications by varying their composition.
True
32
What is a key advantage of using tool steel over other types of steel?
Tool steel has superior hardness and wear resistance.
33
Fill in the blank: The heat treatment process that increases toughness and reduces brittleness is called _______.
tempering
34
What is the primary purpose of quenching in heat treatment?
The primary purpose of quenching is to rapidly cool the material to increase its hardness.
35
What is the role of vanadium in tool steels?
Vanadium improves wear resistance and toughness in tool steels.
36
Multiple Choice: Which type of corrosion occurs due to electrochemical reactions? A) Uniform Corrosion B) Galvanic Corrosion C) Pitting Corrosion D) All of the above
D) All of the above
37
What is the common method of measuring the hardness of steel?
The common method of measuring the hardness of steel is the Brinell hardness test.
38
True or False: The presence of moisture accelerates the corrosion process.
True
39
What is the impact of temperature on the corrosion rate of metals?
Higher temperatures generally increase the corrosion rate of metals.
40
Fill in the blank: The process of adding carbon to iron to create steel is called _______.
carbonization
41
What is the primary characteristic of high-speed steel?
High-speed steel retains its hardness at elevated temperatures.
42
Multiple Choice: Which of the following is a method to prevent galvanic corrosion? A) Use of Sacrificial Anodes B) Coating with Paint C) Avoiding Dissimilar Metals D) All of the above
D) All of the above
43
What is the main disadvantage of using high carbon steel?
The main disadvantage of using high carbon steel is its brittleness.
44
True or False: The addition of nickel to steel improves its toughness.
True
45
What is the effect of sulfur in steel?
Sulfur can improve machinability but decreases ductility.
46
Fill in the blank: Alloys with a high percentage of chromium and nickel are referred to as _______ steels.
stainless
47
What is the significance of tempering after quenching?
Tempering reduces brittleness and relieves stresses in the steel.
48
Multiple Choice: Which type of steel is best suited for cutting tools? A) Low Carbon Steel B) Alloy Steel C) Tool Steel D) Stainless Steel
C) Tool Steel
49
What is the main feature of alloy steels?
Alloy steels have enhanced properties due to the addition of various alloying elements.
50
True or False: Corrosion can be completely eliminated.
False
51
What is the effect of alloying elements on the melting point of steel?
Alloying elements can either raise or lower the melting point of steel.
52
Fill in the blank: The process of cooling steel in air is known as _______.
air cooling
53
What is the primary use of carbon steel in construction?
Carbon steel is primarily used for structural applications due to its strength.
54
Multiple Choice: Which type of corrosion is characterized by localized attack on the material? A) Uniform Corrosion B) Pitting Corrosion C) Crevice Corrosion D) All of the above
B) Pitting Corrosion
55
What is the common method to test for corrosion resistance in materials?
Salt spray testing is a common method to test for corrosion resistance.
56
True or False: Tool steels are often used to make molds and dies.
True
57
What is the effect of heat treatment on the microstructure of steel?
Heat treatment alters the microstructure, affecting hardness and strength.
58
Fill in the blank: The primary alloying element in stainless steel is _______.
chromium
59
What is the purpose of using a protective coating on steel?
The purpose of using a protective coating is to prevent corrosion by creating a barrier.
60
Multiple Choice: Which heat treatment method involves heating to a temperature and then air cooling? A) Quenching B) Normalizing C) Annealing D) Tempering
B) Normalizing
61
What role does silicon play in alloy steels?
Silicon increases strength and improves hardenability.
62
True or False: All tool steels are high carbon steels.
False
63
What is a key advantage of using stainless steel in construction?
Stainless steel offers excellent corrosion resistance.
64
Fill in the blank: The process of heating steel above its transformation temperature is known as _______.
austenitizing
65
What is the importance of the critical temperature in heat treatment?
The critical temperature is the point at which phase changes occur in steel.
66
Multiple Choice: Which of the following is NOT a type of corrosion? A) Uniform B) Pitting C) Intergranular D) Vapor Corrosion
D) Vapor Corrosion
67
What does the term 'hardness' refer to in materials science?
Hardness refers to a material's resistance to deformation or indentation.
68
True or False: Heat treatment can improve the fatigue resistance of steel.
True
69
What is the primary goal of surface hardening processes?
The primary goal is to increase surface hardness while maintaining a tough core.

MMET 207 (10 decks)

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