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Mechanical Operations

Mechanical Operations
Sphericity of pulverised coal is

∞
>1
1

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Mechanical Operations
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a

Mixer-extruder
Banbury mixer
Pug mill
Muller mixer

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Mechanical Operations
Supporting legs of a plate and frame filter is normally made of

Wooden plank
Stainless steel
Cast iron
High speed steel

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Mechanical Operations
At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5 : Power number Re = ρ N D2/μ: Reynold's number N is the impeller rotational speed, and D is the impeller diameter.

Po ∝ Re-1.0
Po ∝ Re1.0
Po ∝ Re0.0
Po ∝ Re0.5

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Mechanical Operations
In a roll crusher, the specific power consumption and the production rate is affected by the

Reduction ratio
Neither A nor B
Differential roll speed
Both A & B

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Mechanical Operations
Which of the following is a pressure filter?

Rotary drum filter
Plate and flame filter
Sand filter
Leaf filter (Moore filter)

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