A dense structure of grinding wheel is not used for the_____________________?

Question: Direct conversion of thermal energy to electrical energy is facilitated by the
[A].

fuel cells.

[B].

photo voltaic cell.

[C].

magneto hydrodynamic generator.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Neutrons are present in all atoms except that of
[A].

He

[B].

C

[C].

H

[D].

Ar

Answer: Option C

Explanation:

No answer description available for this question.

Question: Change in volume of metals from absolute zero temperature to their melting points is
[A].

almost same for all metals.

[B].

different for different metals.

[C].

less for low melting point metals.

[D].

less for high melting point metals.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?
[A].

Cobalt: It contributes to rerl hardness by hardening ferrite.

[B].

Molybdenum: It forms abrasion resisting particles.

[C].

Phosphorous: It improves machinability in free cutting steels.

[D].

Silicon: It reduces oxidation resistance.

Answer: Option A

Explanation:

No answer description available for this question.