In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ?

Question: With decrease in the grain size of a material, its creep resistance
[A].

increases.

[B].

decreases.

[C].

remains constant.

[D].

either (a) or (b) ; depends on the material.

Answer: Option C

Explanation:

No answer description available for this question.

Question: A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid ?
[A].

Arsenic

[B].

Antimony

[C].

Lead

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: With increase in temperature, the electrical conductivity of a __________ decreases.
[A].

semi-conductor

[B].

metal or alloy

[C].

dielectric

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.