Mechanical Operations A tube mill compared to a ball mill Has a higher diameter/length ratio Uses much larger balls Has a higher length/diameter ratio Produces a coarser product Has a higher diameter/length ratio Uses much larger balls Has a higher length/diameter ratio Produces a coarser product ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The operating speed of a ball mill should be __________ the critical speed. At least equal to Much more than Slightly more than Less than At least equal to Much more than Slightly more than Less than ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Screw conveyors are Suitable for sticky materials Suitable for highly abrasive materials Run at very high rpm All of these Suitable for sticky materials Suitable for highly abrasive materials Run at very high rpm All of these 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 Carbonates Sulphates Silicates & phosphates Bi-carbonates Carbonates Sulphates Silicates & phosphates ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Ore concentration by jigging is based on the difference in the __________ of the particles. Specific gravities Wettability Shape None of these Specific gravities Wettability Shape None of these ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is not a wet classifier? Hydrocyclones Sharpies supercentrifuge None of these Dorr Oliver rake classifier Hydrocyclones Sharpies supercentrifuge None of these Dorr Oliver rake classifier ANSWER DOWNLOAD EXAMIANS APP
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