With increase in molecular weight of the gas, the head developed by a centrifugal compressor will

Question: Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50 wt% B is
[A].

R ln 2

[B].

-R ln 2

[C].

3 R ln 2

[D].

-3R ln 2

Answer: Option A

Explanation:

No answer description available for this question.

Question: In multipass welds, shot peening is done after each pass to
[A].

close the surface porosity.

[B].

break the continuity of columnar grains.

[C].

flatten the weldment.

[D].

introduce texture in the weld.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Main alloying element in Elinvar used in precision instruments, hair springs for watches etc. is
[A].

chromium

[B].

nickel

[C].

zinc

[D].

aluminium

Answer: Option B

Explanation:

No answer description available for this question.