Chemical Engineering - Chemical Engineering Basics

41. 

Dry saturated steam can be converted into superheated steam by

A. increasing its cross-sectional area of flow.
B. passing it through a pressure reducing valve.
C. forcing it downwards through a vertical tube.
D. none of these

Answer: Option B

Explanation:

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42. 

Pick out the wrong statement.

A. Copper is the metal having the highest electronic conductivity.
B. Hardenability & weldability of metals are inversely related.
C. Covalant bonding formed by sharing of electrons is present in all semi-conductor materials.
D. Glass transition temperature applies to 'polymers' but not to 'glasses'.

Answer: Option A

Explanation:

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43. 

Increasing sulphur content in pig iron tends to make it

A. soft
B. hard
C. tough
D. ductile & malleable

Answer: Option B

Explanation:

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44. 

Oxyacetylene reducing flame is used while carrying out welding on

A. alloy steel
B. grey cast iron
C. mild steel
D. high carbon steel

Answer: Option C

Explanation:

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45. 

M10 index of coke indicates its

A. compressive strength.
B. hardness.
C. abrasion resistance.
D. impact strength.

Answer: Option C

Explanation:

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