Understanding medical terminology

Case study
In addition to understanding medical terminology, it is also helpful to understand the roles of the healthcare professionals. In this assignment you will research two different careers in the healthcare industry as well as exploring a specialty area.RESOURCES for this Assignment:2. View the healthcare videos on “what an typical day is like” at the link below:http://www.drkit.org/careervideos/3. Link to US News Ranking of the best healthcare jobs:http://money.usnews.com/careers/best-jobs/rankings/best-healthcare-jobs4. Link to information on members of the Healthcare Team:http://dcahec.gwumc.edu/education/session3/members.html

 

Don't use plagiarized sources. Get Your Custom Essay on
Understanding medical terminology
Just from $10/Page
Order Essay

 

ME 260                            Intro. to Engineering Materials                         SPRING 04

 

 

 

 

 

 

TEST 2 SOLUTIONS

           

(Time allocated = 50 min)

 

 

 

Student name: _________________________

 

 

 

 

This is a closed book, closed notes examination.  You may use a calculator and a scale or straight edge. Show your work for each problem clearly and concisely.  Label any figures you use.  The instructor reserves the right to deduct points for poor presentation of your answers.  Indicate answers and units by underlining them or putting them in boxes.  The point value for each problem is indicated in square brackets, e.g., [5 pts].  You have 50 minutes to work on the exam.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. Multiple Choice [10pts]

 

  1. Plain Carbon steels are
  2. A mixture of iron and carbon
  3. A mixture of iron and carbon and small amounts of alloying elements
  4. A mixture of iron and carbon and a large amount of alloying elements
  5. none of the above.

 

  1. Materials with FCC unit cells
  2. are very brittle
  3. do not have a ductile-to-brittle transition temperature
  4. can have a ductile-to-brittle transition temperature at low temperatures
  5. have an atomic packing factor of 0.68

 

  1. Hypo-eutectoid plain carbon steel alloys
  2. Have compositions below 0.76wt.%C
  3. Have compositions greater 0.76wt.%C
  4. Are phases that form at temperatures above the eutectoid temperature
  5. all of the above

 

  1. Creep is important to consider
  2. a) above a homologues temperature of 0.3.
  3. b) above a homologues temperature of 0.4
  4. c) above a homologues temperature of 0.5
  5. d) all of the above.

 

5)   Pearlite

  1. a) is a phase that consists of lamellar arrangement of ferrite and cementite
  2. b) is harder than bainite
  3. c) is softer than ferrite
  4. d) all of the above.

 

  1. TRUE or FALSE, Circle the answer (if answer is false you must give the true answer to receive full credit). [30pts]

 

  1. Fracture toughness values of ceramics are higher than those of metals

    TRUE          FALSE

lower

 

  1. Grey cast iron is a mixture of ferrite and course cementite . TRUE FALSE

 

ferrite and graphite flakes

 

  1. Martensite is a phase that is produced through a diffusion-controlled transformation of

Austenite.       TRUE          FALSE

diffusionless

  1. The fracture strengths of ceramics are predictable. TRUE FALSE

 

random flaws

 

  1. According to the TTT diagram if you heat martensite of eutectoid composition to a temperature of 650oC, it should transform to pearlite (Eutectoid temperature=723oC) TRUE FALSE

 

tempered martensite

 

  1. One of the pre-requisites for precipitation hardening is a solid solubility limit that does not change with temperature. TRUE  FALSE

 

solid solubility limit increasing with temperature

 

  1. By increasing the carbon content of plain carbon steel from 0.76 wt.%C (eutectoid composition) to 0.9 wt.%C we will increase its ductility. TRUE FALSE

 

decrease in ductility or increase in strength

 

  1. Grey cast iron is less ductile in compression than in tension. TRUE FALSE

 

less ductile in tension

 

 

  1. Binary isomorphous alloys are alloys in which both metals making up the alloy are

partially soluble in one another.      TRUE          FALSE

 

complete solubility

 

 

  1. Coring occurs due to very slow cooling during solidification of an alloy from the melt

 

       TRUE          FALSE

 

Fast cooling

 

 

 

 

 

 

 

 

 

 

  1. Considering the phase diagram in Fig. 1. [36]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. Is Fig. 1 a eutectic or eutectoid phase diagram, explain? [4]
Answer:

 

 

 

eutectic

 

  1. What phase(s) are present at the following conditions:

 

  1. Temperature = 800 oC, composition 20 wt% Ag. [2]
Answer:

 

 

Alpha+liquid

Answer:
  • Temperature = 700 oC, composition 71.9 wt% Ag.[2]

 

Alpha+beta

  1. Consider an alloy of  composition 40 wt.% Ag at 778 oC:

 

Answer:
  • What are the compositions of the primary á and eutectic phases present respectively. [4]

 

Alpha 8wt%, eutectic  71.9wt%

Answer:
  • What are the mass fractions of both phases, explain the steps you used to arrive at your answer [6]

 

 

~ 0.5 & ~0.5

 

 

 

 

 

 

 

 

 

Answer:
  • What are the mass fraction of total á and total â, explain the steps you used to arrive at your answer [6]

 

 

Alpha =0.615

Beta = 0.385

 

 

 

 

 

 

 

 

 

 

 

 

Answer:
  • Is it possible to precipitation harden an alloy belonging to this system? If so what composition and heat treatment would you use? [6]

 

 

Yes, choose comp. below 8wt% Ag. Heat into alpha region, quench to room temperature, heat again to temp. below the solvus for specified time then cool to room temperature.

 

 

 

 

 

 

 

 

  1. Sketch the microstructure obtained at room temperature for an alloy of composition 71.9 wt% previously cooled from 800 oC to room temperature. Label all phases present, and explain IN DETAIL why or how this particular microstructure was obtained. [6]
Answer:

 

 

 

 

See text
beta
alpha

 

 

 

 

 

 

  1. ANSWER THE FOLLOWING

 

Answer:
  1. a) i) Define fatigue & creep . [4pts]

 

 

 

see text

 

 

 

 

  1. ii) Where do fatigue cracks usually originate? [2pts]
Answer:

 

 

 

surface

 

 

iii) State two precautions or remedies you can do to reduce the risk of

fatigue.[4pts]

Answer:

 

 

 

 

 

see text

 

 

 

 

 

 

 

 

 

 

Figure 2 shows S-N curves for three alloys.

 

  1. b) Which of the alloy(s) in Figure 1 do not have a fatigue limit? [4 pts]
Answer:

 

 

 

 

brass and Al alloy

 

 

 

 

 

 

Answer:
  • What is the fatigue life of the 2014-T6 aluminum alloy in Figure 1 at a stress amplitude of 200 MPa? If the mean stress was increased would the fatigue life of this sample increase or decrease? [4 pts]

 

 

 

106   decrease

 

 

 

 

 

 

 

 

 

 

Answer:
  • The fracture surface of a specimen that had failed by fatigue contains 20 beachmarks and 3000 striations. What do these numbers tell you about the loading pattern in service and the number of cycles to failure of this component? [6 pts]

 

 

 

No. of machine start and stop = 20

No. of cycles to failure=3000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2. Stress amplitude versus cycles to failure for a steel, an aluminum alloy, and a brass.

Get professional assignment help cheaply

Are you busy and do not have time to handle your assignment? Are you scared that your paper will not make the grade? Do you have responsibilities that may hinder you from turning in your assignment on time? Are you tired and can barely handle your assignment? Are your grades inconsistent?

Whichever your reason may is, it is valid! You can get professional academic help from our service at affordable rates. We have a team of professional academic writers who can handle all your assignments.

Our essay writers are graduates with diplomas, bachelor, masters, Ph.D., and doctorate degrees in various subjects. The minimum requirement to be an essay writer with our essay writing service is to have a college diploma. When assigning your order, we match the paper subject with the area of specialization of the writer.

Why choose our academic writing service?

  • Plagiarism free papers
  • Timely delivery
  • Any deadline
  • Skilled, Experienced Native English Writers
  • Subject-relevant academic writer
  • Adherence to paper instructions
  • Ability to tackle bulk assignments
  • Reasonable prices
  • 24/7 Customer Support
  • Get superb grades consistently

 

 

 

 

 

 

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

We value our customers and so we ensure that what we do is 100% original..
With us you are guaranteed of quality work done by our qualified experts.Your information and everything that you do with us is kept completely confidential.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

The Product ordered is guaranteed to be original. Orders are checked by the most advanced anti-plagiarism software in the market to assure that the Product is 100% original. The Company has a zero tolerance policy for plagiarism.

Read more

Free-revision policy

The Free Revision policy is a courtesy service that the Company provides to help ensure Customer’s total satisfaction with the completed Order. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.

Read more

Privacy policy

The Company is committed to protect the privacy of the Customer and it will never resell or share any of Customer’s personal information, including credit card data, with any third party. All the online transactions are processed through the secure and reliable online payment systems.

Read more

Fair-cooperation guarantee

By placing an order with us, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Open chat
1
You can contact our live agent via WhatsApp! Via +1 817 953 0426

Feel free to ask questions, clarifications, or discounts available when placing an order.

Order your essay today and save 20% with the discount code VICTORY