In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

Question: Broaching tools are usually made of
[A].

cermets

[B].

high speed steel

[C].

tungsten carbide

[D].

stellite

Answer: Option B

Explanation:

No answer description available for this question.

Question: Deformation band is absent in materials having __________ lattice crystal structure.
[A].

fcc

[B].

bcc

[C].

hcp

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Out of the following, the most melleable material is
[A].

copper

[B].

aluminium

[C].

wrought iron

[D].

lead

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be
[A].

ΔQ = 0, ΔS=0

[B].

ΔQ = 0 , ΔS = +ve

[C].

ΔQ = 0, ΔS = -ve

[D].

ΔQ = +ve , ΔS= +ve

Answer: Option B

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.