Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium?

Question: For preparation of porous bearings by powder metallurgy, preferred particle shape is
[A].

spherical

[B].

nodular

[C].

irregular

[D].

no preferred shape

Answer: Option A

Explanation:

No answer description available for this question.

Question: Lithium is a useful alloying addition to aluminium, because it
[A].

is cheap.

[B].

imparts solid solution strengthening.

[C].

lowers density and contributes to age hardening.

[D].

improves the corrosion resistance of aluminium.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as
[A].

Gr0.25, Gr

[B].

Gr0.25, Gr0.33

[C].

Gr, Gr0.25

[D].

Gr0.33, Gr0.25

Answer: Option A

Explanation:

No answer description available for this question.