CHEM MATERIAL 2014 AUTUMN Essay

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Autumn 2014- Main Exam

STUDENT NUMBER:

~UTS

I .I \I l I I I I I

SURNAME:
(FAMILY NAME)

UNIVERSITY OF TECHNOLOGY, SYilNEY

OTHER NAMES:

This paper and all materials issued mu$t.be returned at the end of the examination.
They are not to be removed from the exam centre.
Examination Conditions: lt is your responsibility to fill out and complete your details in the space provided on all the examination material provided to you. Use the time before your examination to do so as you will not be allowed any extra time once the exam has ended.
You are not permitted to have onyout desk or on your person any tmauthorised material. This includes butnot limited to:

Mobile phones

Smart watches

Electronic devices

Draft paper (unless provided)

Textbooks (unless specified)

Notes (l.lhless specified)
You are not permitted to obtain assistance by improper means or ask for help from or give help to any other person.
You are not permitted to leave your seat
(including to use the toilet):

Until 90 mins has elapsed

During the final 15 mins
During the examination you must first seek permission (by raising your hand) from a supervisor before:

Leaving early (after 90

Using the toilet

Accessing your bag

60101 Chemistry & Materials Science
Saturday, 141h June 2014. 2.00pm- 5.00pm

Time Allowed: 3 hour$
No reading time

This is a Closed Book exam
Please refer to the permitted material!!; below:

Permitted materials forthis.exam:


Calculators (non-programmable only)



Drawing instruments
i.e. Rl..llers, Set Squares and Compasses

Materials provided for this exam:


This examination paper



One (1) multiple choice answer sheet (GPAS-240R)

Students please note:


Equations and relevant data are provided at the end of the exam paper Disciplinary action will.be taken against you if you infringe universiijrules.

Do not turn over or open your exam paper until instructed.
Faculty of Science

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Do not write your answers on this page.

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Autumn 2014

60101 Chemistry & Materials Science
--~-----------------------------------------------------------------------------------------------------·--------------------------·

Tensile Testing
1. Which one of the following types of stress strain relationship best describes the behaviour of brittle materials such as ceramics and thermosetting plastics:

(a)
(b)
(c)
(d)

elastic and perfectly plastic, elastic and strain hardening, perfectly elastic, or none of the above.

2. Which one of the following types of stress strain relationship best describes the behaviour of most metals at room temperature:

(a)
(b)
(c)
(d)

elastic and perfectly plastic, elastic and strain hardening, perfectly elastic, or none of the above

3. A 100-mm~long steel bar is tested in tension, so that the change in the length is 0.05 mm. If
E 200 GPa, what is the stress developed in the bar?

=

(a)
(b)
(c)
(d)

200 MPa
100 MPa
50 MPa
None of these

4. A steel shaft is subjected to a tensile stress of 500kN. If the shaft has a diameter of 50mm,

what is the stress in the shaft?

(a)
(b)
(c)
(d)
(e)

0.3 MPa .
300 MPa
200 MPa
64 MPa
255 MPa

5. If this steel shaft increases in length by 1mm, what will be the strain on the shaft given the initial length is 1m and E= 200GPa?
(a)
(b)
(c)
(d)
(e)

1
0.001
0.001 mm
0.01 mm
1mm

Questions

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200

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100

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