Mechanical Operations The critical speed of a trommel (N) is related to its dia (D) as N ∝ 1/D N ∝ D N ∝ √D N ∝ 1/√D N ∝ 1/D N ∝ D N ∝ √D N ∝ 1/√D ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of __________ mm. 0.3 0.014 0.007 50 0.3 0.014 0.007 50 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge Decreases Remains constant Increases Increases linearly Decreases Remains constant Increases Increases linearly ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake) Independent of ΔP ∝ ΔP ∝ 1/ ΔP ∝ √ΔP Independent of ΔP ∝ ΔP ∝ 1/ ΔP ∝ √ΔP ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Helical screw agitator is used for Blending immiscible liquids Mixing liquids at very high temperature (> 250 °C) None of these Mixing highly viscous pastes Blending immiscible liquids Mixing liquids at very high temperature (> 250 °C) None of these Mixing highly viscous pastes ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Gravity settling process is not involved in the working of a Classifier Dorr-thickener Sedimentation tank Hydrocyclone Classifier Dorr-thickener Sedimentation tank Hydrocyclone ANSWER DOWNLOAD EXAMIANS APP
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