A. Run at very high rpm
B. Suitable for sticky materials
C. Suitable for highly abrasive materials
D. All A., B. and C.
Screw conveyors are________________? Read More »
Mechanical Operations A. Jigging
B. Tabling
C. Froth floatation
D. Elutriation
Gold ore concentration is mostly done using___________________? Read More »
Mechanical Operations A. Jaw crusher
B. Rod mill
C. Ball mill
D. Fluid energy mill
A. Frother
B. Collector
C. Depressor
D. Conditioner
Pine oil and Cresylic acid are used as ______________ in the froth floatation process? Read More »
Mechanical Operations A. 4
B. 1/4
C. 1
D. 1/2
A. 0.5
B. 1
C. < 1
D. √3
For raschig rings, the sphericity is_____________________? Read More »
Mechanical Operations A. μ > tan α
B. μ ≥ tan α
C. μ > tan 2α
D. μ ≤ tan α
A. Electric spark
B. Corona discharge
C. Alternating current
D. None of these
A cottrell precipitator makes use of the ______________ for dusty air cleaning? Read More »
Mechanical Operations A. Fine (e.g. – 200 mesh size coal)
B. Sticky (e.g. clay paste)
C. Small lumpy (e.g. grains and sand)
D. Free flowing
Bucket elevators are not suitable for the vertical lifting of __________ materials? Read More »
Mechanical Operations A. cm-1
B. gm/cm-1
C. cm/gm-1
D. gm-1
The unit of filter medium resistance is________________? Read More »
Mechanical Operations