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Mechanical Engineering - Engineering Materials

Exercise : Engineering Materials - Section 4
36.
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called
coordination number
atomic packing factor
space lattice
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Which of the following statement is incorrect about duralumin?
It is prone to age hardening
It can be forged
It has good machining properties
It is lighter than pure aluminium
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The property of a material which enables it to retain the deformation permanently, is called
brittleness
ductility
malleability
plasticity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Sulphur in cast iron
makes the iron soft and easily machinable
increases hardness and brittleness
makes the iron white and hard
aids fusibility and fluidity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Cementite consist of
13% carbon and 87% ferrite
13% cementite and 87% ferrite
13% ferrite and 87% cementite
6.67% carbon and 93.33% iron
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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