Fourier’s law applies to the heat transfer by

Question: In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.
[A].

μ , α and θ all have units of m/s.

[B].

μ , α and θ all have units of m2/s.

[C].

α and θ have units of m2/s, while μ has unit of m/s.

[D].

α and θ have units of m/s, while μ has unit of m2/s.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Heat treatment of steel is done mainly to change its
[A].

mechanical properties.

[B].

physical properties,

[C].

chemical composition.

[D].

all ‘a’, ‘b’ & ‘c’.

Answer: Option A

Explanation:

No answer description available for this question.