Mechanical Operations Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of Stainless steel Concrete Flint or porcelain Bronze Stainless steel Concrete Flint or porcelain Bronze ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pine oil and cresylic acid are used as __________ in the froth floatation process. Conditioner Depressor Collector Frother Conditioner Depressor Collector Frother ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The main differentiation factor between tube mill and ball mill is the Size of the grinding media Final product size Operating speed Length to diameter ratio Size of the grinding media Final product size Operating speed Length to diameter ratio ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations With increase in drum speed, in a rotary drum filter, the filtration rate Is not affected Increases Decreases Increases linearly Is not affected Increases Decreases Increases linearly ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Screen efficiency is Recovery/rejection Rejection None of these Recovery Recovery/rejection Rejection None of these Recovery ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (Np) varies with NRe as Np ∝ NRe Np ∝ √NRe Np → constant Np ∝ 1/NRe Np ∝ NRe Np ∝ √NRe Np → constant Np ∝ 1/NRe ANSWER DOWNLOAD EXAMIANS APP
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