MCQs on Introduction to Composites
1 - Question
Composites can be classified based on ___________
a) matrix type
b) reinforcement constituent
c) matrix type & Reinforcement constituent
d) neither on matrix type nor on reinforcement constituent type
Explanation: Composites cans be classified based on matrix types and reinforcement constituent types as shown below:
2 - Question
Which of the following is not a laminar composite?
Explanation: Wood is not a laminar composite. Bimetallic, cladding and paints are considered as laminar composites.
3 - Question
The composite constituents of both matrix and reinforcements are softer.
Explanation: Matrix constituents are generally softer whereas reinforced constituents provide hardness to the composites. advertisement
4 - Question
In sandwich composites, which of the following material can be used for filling purpose?
d) All of the mentioned
Explanation: Wood, cement, and polymer can be used to fill the gap in sandwich composites.
5 - Question
Which of the following have a greater impact on longitudinal strength of reinforced composites?
a) Fiber orientation
b) Fiber strength
c) Fiber length
d) Fiber diameter
Explanation: Longitudinal strength of reinforced composites is directly proportional to its fiber strength.
6 - Question
Which of the following may alter the mechanical properties of reinforced composites?
a) Constituent properties
b) Fiber length
c) Fiber orientation
d) All of the mentioned
Explanation: Constituent properties, fiber length etc affect the overall property of reinforced composites.
7 - Question
Which of the following property can be enhanced by reinforcing an aluminum alloy?
b) Torsion resistance
c) Wear resistance
Explanation: It is observed that for an aluminium alloy matrix composites when reinforced with ceramic particles, there is an increase in the wear resistance.
8 - Question
Which of the following is the correct size range of dispersoids (in micrometres) in dispersion strengthened composites?
Explanation: Dispersoids size varies from 0.01 micrometre to 0.1 micrometre. They are very small.
9 - Question
Which of the following is correct dimensional of flake composites?
Explanation: Flake composites are two dimensional in nature and can be easily represented on a plane of the paper.
10 - Question
Fire point of composite is high.
Explanation: Composites have low fire and flash point, and this is one of the main drawbacks.