Consider the following pairs of plastics and their distinct characteristics:
1. Acrylics…. Very good transparency to light
2. Polycarbonate…. Poor impact resistance
3. PTFE …. Low coefficient of friction
4. polypropylene ….. Excellent fatigue strength
Which of these statements are correct?
Option (A)
2 and 3
Option (B)
1 and 3
1 and 4
2 and 4
Correct Option:
Question Solution:
Polytetrafluoroethylene has very low coefficient of friction and it does not stick to other materials. Poly propylene has the capability to be bent repeatedly has the capability to be bent repeatedly and no crack will develop in it