Chemical Engineering - Chemical Engineering Basics

21. 

The trace metal present in insulin is

A. Cu
B. Zn
C. Fe
D. Ni

Answer: Option B

Explanation:

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

22. 

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

A. retained austenite.
B. martensite formation.
C. relatively high sulphur content in the base metal.
D. sufficient hydrogen present in the welding arc.

Answer: Option B

Explanation:

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

23. 

Drossing is a __________ operation.

A. smelting
B. dressing
C. roasting
D. dressing

Answer: Option C

Explanation:

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

24. 

Most of the phosphorous present in the blast furnace burden enters into

A. hot metal
B. flue gases
C. slag
D. refractory lining

Answer: Option A

Explanation:

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

25. 

During sensible heating of humid air

A. relative humidity increases.
B. dew point remains constant.
C. dry bulb & wet bulb temperature increases.
D. both 'b' & 'c'.

Answer: Option D

Explanation:

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