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Biomedical Engineering Exam: Material Science for Higher Certificate Students, Exams of Materials science

Baddi University of Emerging Sciences and TechnologiesMaterials science

A past exam paper from the cork institute of technology for the higher certificate in engineering in biomedical engineering (nfq level 6) autumn 2006. The exam focuses on material science and lasts for 3 hours. It includes questions on the essential differences between covalent, ionic, and metallic bonds, the effect of cooling rate on grain growth, synthetic materials, steels and cast irons, grain orientation and tensile testing, non-destructive testing, phase equilibrium diagrams for cadmium bismuth alloys, and factors determining the fatigue life of metals and the concept of creep.

Typology: Exams

2012/2013

Uploaded on 04/13/2013

pankhudi
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Cork Institute of Technology
Higher Certificate in Engineering in Biomedical Engineering – Stage 1
(NFQ Level 6)
Autumn 2006
Material Science
(Time: 3 Hours)
Instructions
Answer FIVE questions.
All questions carry equal marks.
Examiners: Mr. J. Calvey
Mr. D. Tallon
Prof. P. McHugh
Q1. (a) Considering the fundamental structures of materials, name the essential differences between
a) a covalent bond
b) an ionic bond
c) a metallic bond (10 marks)
(b) With the aid of a sketch describe the effect of cooling rate on grain growth in metals.
(10 marks)
Q2. (a) Synthetic materials can be divided into three main groups, name them and give ONE
example each. (10 marks)
(b) Briefly explain the essential differences between steels and cast irons. (10 marks)
Q3. (a) Describe with the aid of diagrams how grain orientation can affect tensile test results.
(10 marks)
(b) With regard to tensile testing what is meant by “Proof stress”? (10 marks)
pf3

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Cork Institute of Technology

Higher Certificate in Engineering in Biomedical Engineering – Stage 1

(NFQ Level 6)

Autumn 2006

Material Science

(Time: 3 Hours)

Instructions Answer FIVE questions. All questions carry equal marks.

Examiners: Mr. J. Calvey Mr. D. Tallon Prof. P. McHugh

Q1. (a) Considering the fundamental structures of materials, name the essential differences between a) a covalent bond b) an ionic bond c) a metallic bond (10 marks)

(b) With the aid of a sketch describe the effect of cooling rate on grain growth in metals. (10 marks)

Q2. (a) Synthetic materials can be divided into three main groups, name them and give ONE example each. (10 marks) (b) Briefly explain the essential differences between steels and cast irons. (10 marks)

Q3. (a) Describe with the aid of diagrams how grain orientation can affect tensile test results. (10 marks) (b) With regard to tensile testing what is meant by “Proof stress”? (10 marks)

Q4. (a) Describe with the aid of sketches the Radiography method of non-destructive testing. (10 marks) (b) Explain why NDT is an important element of a programme of quality control and give examples of where it would be used. (10 marks)

Q5. (a) Fig.1 shows a phase equilibrium diagram for a Cadmium Bismuth alloy.

(1) Approximately what is the lowest melting point alloy that can be made from these two materials? (2) What is the name given to point E on the diagram? (3) What phases are present at point X and point Y?

Fig. 1 (10 marks)

(b) In relation to Alloys, what is meant by the term “Coring”? (10 marks)

Q6. (a) List four factors that can determine the fatigue life of a metal component. (10 marks) (b) Explain what is meant by the term “creep” and state the conditions under which it occurs. (10 marks)