Chemical Engineering - Chemical Engineering Basics

46. 

Which of the following has rotten eggy smell ?

A. Hydrogen sulphide
B. Styrene
C. Phenol
D. Dimethyl amine

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

47. 

Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of

A. hydrochloric acid
B. methyl alcohol
C. formic acid
D. nitric acid

Answer: Option D

Explanation:

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48. 

In hot working, dynamic recovery occurs in

A. metals of low stacking fault energy.
B. metals of high stacking fault energy e.g. α-iron.
C. single crystal of Ni-based superalloys.
D. none of these.

Answer: Option B

Explanation:

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49. 

Which of the following manufacturing processes produces the strongest components ?

A. Forging
B. Cold rolling
C. Hot rolling
D. Die casting

Answer: Option A

Explanation:

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50. 

Cast iron compared to steel is better in

A. ductility
B. strength
C. malleability
D. fluidity & castability

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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