Chemical Engineering - Mechanical Operations

46.
In a ball mill, the volume occupied by the balls (when the mill is stopped) is about __________ percent of the volume of the mill.
35
50
70
85
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
Separation of materials of the same density based on their sizes by using then-different rates of flow is called
sorting
sizing
flocculation
elutriation
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a
pug mill
mixer-extruder
banbury mixer
muller mixer
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are
carbonates
sulphates
silicates & phosphates
bi-carbonates
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter (d) as
d
d
d2
1/d
Answer: Option
Explanation:
No answer description is available. Let's discuss.