Chemical Engineering - Chemical Engineering Basics

16. 

Hoope's cell is predominantly used for the electrolytic refining of

A. zinc
B. copper
C. aluminium
D. tin

Answer: Option C

Explanation:

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17. 

Lead percentage in pure galena is about

A. 8.6
B. 86.6
C. 35.8
D. 61.4

Answer: Option A

Explanation:

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18. 

Pick out the wrong statement.

A. Erosion corrosion which is identified by surface grooves, occurs due to the combined action of corrosive environment and mechanical abrasion.
B. Stress corrosion occurs due to the combined action of corrosive environment and the compressive stress.
C. Stainless steel is prone to stress corrosion in solution containing chloride ion.
D. In case of stress corrosion, the direction of crack propagation is perpendicular to the applied tensile stress.

Answer: Option B

Explanation:

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19. 

The life of a ball bearing is inversely proportional to

A. (load)1
B. (load)2
C. (load)3
D. (load)0.33

Answer: Option C

Explanation:

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20. 

Pick out the wrong statement.

A. Partnership is suitable for medium size business.
B. A certain minimum of subscription of capital is required for legally starting a business in a Public Limited Joint Stock Company.
C. Public Limited Joint Stock Company is legally bound to issue prospectus after registration.
D. A small scale industry is the one, which has a minimum capital investment of Rs. 50 lakhs and maximum 100 lakhs.

Answer: Option D

Explanation:

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