Chemical Engineering Basics

Question: For an ideal gas, Cp – Cv is
[A].

R

[B].

-R

[C].

0

[D].

(3/2) R

Answer: Option A

Explanation:

No answer description available for this question.

Question: In which of the following reactions, application of vacuum will help ?
[A].

Number of gas molecules in the product side is more than that on the reactant side.

[B].

Number of gas molecules in the reactant side is more than that on the product side.

[C].

Number of gas molecules are the same on both the reactant & the product side.

[D].

None of the above.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Often earing defects are found during deep drawing operation, because the
[A].

surface finish of the sheet is poor.

[B].

sheet material has been given substantial spring back.

[C].

starting sheet has planer anisotropy due to its texture.

[D].

starting sheet has normal anitropy due to its texture.

Answer: Option C

Explanation:

No answer description available for this question.

Question: A jet engine turbine blade is normally manufactured by
[A].

forging.

[B].

shell moulding.

[C].

investment casting.

[D].

pressure die casting.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In age-hardenable alloys, maximum ductility is obtained
[A].

in as cast state.

[B].

immediately after solution treatment and subsequent quenching.

[C].

after optimum ageing.

[D].

after overageing.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be
[A].

higher, as it gives higher wavelength.

[B].

lower, as it gives higher wavelength.

[C].

higher, as it gives shorter wavelength.

[D].

lower, as it gives shorter wavelength.

Answer: Option C

Explanation:

No answer description available for this question.

Question: An alloy of Fe – 0.4 % C is
[A].

cast iron.

[B].

hypo-eutectoid steel.

[C].

hyper-eutectoid steel.

[D].

eutectoid steel

Answer: Option B

Explanation:

No answer description available for this question.

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: In a good rimming steel
[A].

carbon and silicon should be low.

[B].

silicon should be low but carbon should be high.

[C].

both silicon & carbon should be high.

[D].

silicon should be high but carbon should be low.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Yield strength of a polycrystalline metal with an average grain size, d, is proportional to
[A].

d1/2

[B].

d-1/2

[C].

d

[D].

d-1

Answer: Option B

Explanation:

No answer description available for this question.