Chemical Engineering - Mechanical Operations

41. 

The value of 'angle of nip' is generally about

A. 16°
B. 32°
C. 52°
D. 64°

Answer: Option B

Explanation:

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

42. 

Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.

A. metalliferrous ores
B. non-metallic ores
C. basic slags
D. asbestos & mica

Answer: Option A

Explanation:

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

43. 

Sulphuric acid mist is arrested by using a __________ scrubber.

A. packed wet
B. hollow wet
C. venturi
D. co-current

Answer: Option C

Explanation:

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

44. 

The main size reduction operation in ultrafine grinders is

A. cutting
B. attrition
C. compression
D. impact

Answer: Option B

Explanation:

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

45. 

In case of a hammer crusher,

A. crushing takes place by impact breaking.
B. maximum acceptable feed size is 30 cms.
C. reduction ratio can be varied by adjusting the distance from cage to hammers.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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