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Chemical Engineering - Mechanical Operations

Exercise : Mechanical Operations - Section 1
36.
The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond's law) of the energy to grind the particles from a very large size to 50 μrn is
6.35 kWh/ton
9.0 kWh/ton
18 kWh/ton
25.4 kWh/ton
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Which of the following is the most suitable for cleaning of fine coal dust (<0.5 mm) ?
Trough washer
Baum jig washer
Spiral separator
Froth floatation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Pick out the correct statement:
Removal of iron from ceramic material is necessitated (by magnetic separation method) so as to avoid discolouration of ceramic products.
The operating cost of shaking screen is more than that of a vibrating screen.
Screen capacity does not depend upon the specific gravity of the minerals.
Asphalt is best crushed using toothed roll crusher.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is
0.01 to 0.1
0.1 to 0.3
0.2 to 0.8
0.2 to 0.4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Highly viscous liquids & pastes are agitated by
propellers
turbine agitators
multiple blade paddles
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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