Mechanical Operations The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to N³ N² N° N¹ N³ N² N° N¹ ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Use of grinding aids results in the Enhanced production rate Both A & B Neither A nor B Finer products Enhanced production rate Both A & B Neither A nor B Finer products ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are Bi-carbonates Sulphates Silicates & phosphates Carbonates Bi-carbonates Sulphates Silicates & phosphates Carbonates ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A compressible cake has the Maximum porosity at the upstream side Same porosity throughout the cake thickness None of these Maximum porosity at the filter medium Maximum porosity at the upstream side Same porosity throughout the cake thickness None of these Maximum porosity at the filter medium ANSWER DOWNLOAD EXAMIANS APP
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 ∝ Re0.0 Po ∝ Re0.5 Po ∝ Re-1.0 Po ∝ Re1.0 Po ∝ Re0.0 Po ∝ Re0.5 Po ∝ Re-1.0 Po ∝ Re1.0 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Equivalent diameter of a particle is the diameter of the sphere having the same Ratio of surface to volume as the actual volume None of these Volume as the particle Ratio of volume to surface as the particle Ratio of surface to volume as the actual volume None of these Volume as the particle Ratio of volume to surface as the particle ANSWER DOWNLOAD EXAMIANS APP
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