Strain hardening effect in a metal subjected to cold working is due to the ______________ mechanism?

Question: Existence of velocity potential implies that the fluid is
[A].

irrotational

[B].

ideal

[C].

compressible

[D].

in continuum

Answer: Option A

Explanation:

No answer description available for this question.

Question: Oxide layer formed on the non-ferrous metal surface after its annealing is
[A].

removed by acid pickling.

[B].

hammered into the surface.

[C].

removed with coarse emery cloth.

[D].

left as such to protect the surface.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heat release during phase change is observed in case of a/an
[A].

boiler

[B].

condenser

[C].

evaporator

[D].

all (a), (b) & (c)

Answer: Option B

Explanation:

No answer description available for this question.

Question: Constituents of stellite are
[A].

zinc, copper & nickel.

[B].

cobalt, chromium & tungsten.

[C].

zinc, aluminium & nickel.

[D].

nickel, cobalt & vanadium.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Carburettor in a spark ignition engine is used to
[A].

mix air-fuel in the desired ratio.

[B].

maintain a constant speed at varying loads.

[C].

adjust the stroke length.

[D].

increase the compression ratio.

Answer: Option A

Explanation:

No answer description available for this question.

Question: With increase in temperature, the electrical conductivity of a __________ decreases.
[A].

semi-conductor

[B].

metal or alloy

[C].

dielectric

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.