Chemical Engineering - Chemical Engineering Basics

6. 

Which of the following alloying elements when added in steel does not improve its lachinability ?

A. Sulphur
B. Phosphorous
C. Copper
D. Lead

Answer: Option C

Explanation:

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7. 

Largest application of laser welding is in __________ welding.

A. microspot
B. under water
C. precious metals
D. heavy structure

Answer: Option A

Explanation:

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8. 

Which of the following is a neutral flux used in the pyrometallurgy of metal extraction?

A. Quartz
B. Flourspar
C. Dolomite
D. Manganese ore

Answer: Option B

Explanation:

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9. 

The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2 .

A. 273.15
B. 225.65
C. 100.03
D. 373.15

Answer: Option B

Explanation:

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10. 

Value of a material is usually considered as a relationship between

A. cost and profit.
B. utility and appearance.
C. utility and cost.
D. reliability and utility.

Answer: Option C

Explanation:

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