Mechanical Operations In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced. Tailing None of these Concentrate Middling Tailing None of these Concentrate Middling ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Pick out the wrong statement pertaining to the roll crushers. For hard material's crushing, the reduction ratio should not exceed 4 Both the rolls run necessarily at the same speed Maximum feed size determines the required roll diameter Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced For hard material's crushing, the reduction ratio should not exceed 4 Both the rolls run necessarily at the same speed Maximum feed size determines the required roll diameter Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Which of the following is not categorised as a "mechanical operation"? Humidification Size enlargement Agitation Filtration Humidification Size enlargement Agitation Filtration ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size ) S/c C/s 1/s . c S . c S/c C/s 1/s . c S . c ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Reduction ratio of crushers is the Ratio of discharge opening to feed opening None of these Determining factor for minimum dia of the feed and the product Ratio of feed opening to discharge opening Ratio of discharge opening to feed opening None of these Determining factor for minimum dia of the feed and the product Ratio of feed opening to discharge opening ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations A screen is said to be blinded, when the Screen capacity is abruptly increased Undersizes are retained in oversize fraction Oversizes are present in undersize fraction Screen is plugged with solid particles Screen capacity is abruptly increased Undersizes are retained in oversize fraction Oversizes are present in undersize fraction Screen is plugged with solid particles ANSWER DOWNLOAD EXAMIANS APP
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