100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Power Engineering 2A2 - Part 1 Exam Questions And Answers 100% Pass CA$17.84   Add to cart
Quickly navigate to
Preview
  2.  
  3. Power Engineering
  4.  
  5. Power Engineering

Exam (elaborations)

Power Engineering 2A2 - Part 1 Exam Questions And Answers 100% Pass
 1 view  0 purchase
  • Course
  • Power Engineering
  • Institution
  • Power Engineering

Power Engineering 2A2 - Part 1 Exam Questions And Answers 100% Pass 3 defined groups/categories of Metallurgy? - answer- Extractive - Mechanical - Physical Define 'Extractive' Metallurgy. - answer- The study of extraction and purification of metals from their ores. This includes a stepped pro...

[Show more]

Preview 4 out of 38  pages

Document information

  • November 3, 2024
  • 38
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • power engineering 2a2 part 1 exam questions and

Written for

  • Power Engineering
  • Power Engineering

Seller

avatar-seller
Thebright

Content preview

©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM


Power Engineering 2A2 - Part 1 Exam
Questions And Answers 100% Pass


3 defined groups/categories of Metallurgy? - answer✔- Extractive
- Mechanical
- Physical

Define 'Extractive' Metallurgy. - answer✔- The study of extraction and purification of metals
from their ores. This includes a stepped process which can utilize Pyrometallurgy,
Hydrometallurgy or Electrometallurgy

Define Pyrometallurgy: - answer✔- Melting the ore in a furnace to release the metal

Define Hydrometallurgy: - answer✔- Dissolving the metal from the ore and recovering it as a
powder

Define Electrometallurgy: - answer✔- Dissolving the metal from the ore with the use of
electricity, plate the metal out of solution

What is Mechanical Metallurgy? - answer✔- The study of the techniques and mechanical forces
that shape and make finished forms of metal
- The study of the effects of stress, time and temperature

What is Physical Metallurgy? - answer✔- The study of the structure of metals - property of
metals are intimately related to their structures
- The physical metallurgy - or structure of a metal - can be changed by modifying chemical
composition, alloys and heat treatments

General characteristics of 'Metals'? - answer✔- Good conductors of heat and electricity
- Generally malleable and ductile
- Occur naturally in ores in the form of chemical compounds such as sulphides or oxides

, ©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM

What are Noble Metals? - answer✔- A metal that resists chemical action and does not corrode
or oxidize, and is not easily attacked by acids

Metals can exist in 3 common physical states depending on what? - answer✔Temperature and
pressure

Describe 'latent heat of fusion' in relation to metals. - answer✔- Het energy is added until
temperature no longer increases and the cohesive bonds holding the individual atoms together
break. This causes the metal to melt.

The main concern with metallurgy and industry is...? - answer✔- The complexity of the solid-to
liquid-to solid phase changes metals go through as they are refined
- The chemical and physical properties exhibited by them during these transitions

Define 'Unit Cells' in relation to the atomic structure of metals. - answer✔- When a metal
changes state from molten to solid, the rigid atomic structure of the atoms settles in 1 of 3
possible configurations:
1) Face-centered cubic (FCC) unit cells
2) Body-centered cubic (BCC) unit cells
3) Close Packed Hexagonal (CPH) unit cells

Face-centered Cubic (FCC) unit cells? - answer✔- 14 atoms make up the FCC cell
- Properties include: high ductility, low shear, low tensile strength, but good thermal and
electrical conductivity

Define Ductility: - answer✔- A measure of a metals ability to undergo significant plastic
deformation before rupture, which may be expressed as elongation or percent area reduction
from a tensile test.
- Often characterized by a materials ability to be stretched into a wire

Define Malleability: - answer✔- A materials ability to deform under compressive stress; often
characterized by a materials ability to form a thin sheet by hammering or rolling - without
fracture.

Both ductility and malleability are aspects of a materials...? - answer✔- Plasticity: the extent to
which a solid material can be plastically deformed without fracture
- The plasticity is dependant on temperature and pressure

, ©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM

Ductility and malleability are not always coextensive. True or False? - answer✔True. Gold is
both ductile and malleable while Lead has a very low ductility but high malleability.

What is Shear Strength? - answer✔- The strength of a material or component against the type
of yield or structural failure when the component fails in shear.

What is Shear Load? - answer✔- A force that tends to produce a sliding failure on a material
along a plane that is parallel to the direction of the force.

Metals that have FCC unit cell structures in the solid state? - answer✔- Gold, aluminum, silver,
lead, nickel, gamma iron (iron between temperatures 910 - 1390 deg.C)

# of atoms contained in a BCC structure? - answer✔9 atoms total

Characteristics of metals with the Body-centered cubic structure? - answer✔- High strength
- Low ductility
- Very resistant to shear deformities

Examples of BCC metals? - answer✔Chromium, tungsten, molybdenum, vanadium, alpha iron
(solid state iron below 910 deg.C) and delta iron (iron above 1390 deg.C)

How many atoms make up a Close-packed hexagonal structure? - answer✔17 atoms total

Characteristics of CPH structured unit cells? - answer✔Intermediate strength and Intermediate
ductility

Materials that possess CPH unit cell structures? - answer✔Zinc, magnesium, cadmium, titanium

When molten metal cools and solidifies, what action do unit cells take? - answer✔- Unit cells
become packed together to form 3 dimensional crystals that occupy a space lattice.
Further growth of these crystals form dendrites (evergreen tree looking crystals)

Properties of materials with small grain size? - answer✔- High tensile strength
- Highly ductile

Properties of materials with large grain size? - answer✔- High creep/deformation resistance
under constant loading
- More prone to cracking

, ©THEBRIGHT EXAM SOLUTIONS
10/30/2024 11:32 PM

Shear strength of metals is primarily determined by the type of Unit Cell Structure exhibited.
True or False? - answer✔True.
1) HIGH ATOM PACKED DENSITY FCC structures are very ductile (easy to elongate) with a low
shear strength - Ex.) Lead.
2) LOW ATOM PACKED DENSITY BCC structures have high hardness and a high shear strength.
Ex.) Iron

Opposite of metal hardness is...? - answer✔- A hard metal is does not possess TOUGHNESS.
- Hardness: resistance to deformation

What is Polymorphism and what does it have to do with metals? - answer✔- The ability of a
metal to change its unit cell structure through varying temperature ranges.
- Most metals exhibit this property; most important for the study of iron.

What is the allotropy of Iron? - answer✔- The change in atomic cell structure dependant on
temperature
- Various physical forms of metals can affect their: melting point, hardness, metal solubility, and
alloying chemistry.

Properties of pure Iron? - answer✔- Relatively soft
- Ductile
- Low strength
- Possesses few of the noble properties commonly associated with steel

Percentage carbon content in Carbon Steels and Cast Iron? - answer✔Carbon Steels: Alloys
containing 2% or less carbon
Cast Iron: 2% - 6% carbon

Three grades of Carbon Steel? - answer✔Low carbon steel: .04% to .30% carbon (mild steel)
Medium carbon steel: .31% to .60% carbon steel
High carbon steel: .61% to 1-1.50% carbon steel (tool steel)

Steel properties as carbon content increases? Decreases? - answer✔1) Hardness and brittleness
increase as carbon content increases

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller Thebright. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$17.84. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

82871 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling

Recently viewed by you

Exam (elaborations) ·

(0)

2023/2024 NFL Agent Exam

CA$17.84
  • (0)
  Add to cart