Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity) ____________________?

Question: __________ can not increase the fatigue strength of a material.
[A].

Grain refining

[B].

Grain coarsening

[C].

Surface hardening

[D].

Shot peening

Answer: Option B

Explanation:

No answer description available for this question.

Question: Acetylene should never be conveyed through __________ pipe, as it forms an unstable compound that dissociates violently at the slightest shock.
[A].

stainless steel

[B].

copper

[C].

aluminium

[D].

brass

Answer: Option B

Explanation:

No answer description available for this question.

Question: Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.
[A].

grey

[B].

black

[C].

opaque

[D].

white

Answer: Option A

Explanation:

No answer description available for this question.

Question: Creep consideration is the most important in case of the
[A].

blades of gas turbines.

[B].

steam engine flywheel.

[C].

cast iron pipes.

[D].

cycle chains.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Wood is a/an __________ material.
[A].

amorphous

[B].

cellular

[C].

homogeneous

[D].

grannular

Answer: Option B

Explanation:

No answer description available for this question.