10. Which one of the following polymers is recommended for bearing applications

Question

10. Which one of the following polymers is recommended for bearing applications
a.
Polyamides

b.
Epoxy

c.
Polyester

d.
Rubber

e.
None of the above



11. Silicon-oxygen tetrahedron is the basic structural unit of all silicates. It contains of
a.
One silicon atom surrounded by four oxygen tomes

b.
Two silicon atom surrounded by four oxygen tomes

c.
One silicon atom surrounded by two oxygen tomes

d.
Three silicon atom surrounded by one oxygen tomes

e.
None of the above



12. In the clay processes, firing causes major changes in the product volume. Which one of the following statements is correct
a.
At very high level of temperature (above 800

Explanation / Answer

d. Rubber a. One silicon atom surrounded by four oxygen tomes b. At very high level of temperature (above 800 ºC), very high expansion in volume takes place a. Stress concentration a. 900 ºC d. All gas-forming reaction are completed d. Design the part with sharp edges d. Porcelain c. 35 % SiO2

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