Mechanical Operations

Fluid energy mill comes in the category of________________? A. Grinder B. Crusher C. CutterD. Ultrafine grinder

Which of the following is used for primary crushing of very hard lumpy materials ? A. Toothed roll crusherB. Gyratory crusher C. Ball mill D. Tube mill

Dry powdery solid materials are transported by a ______________ conveyor? A. Belt B. BucketC. Screw D. None of these

Which is the most suitable conveyor for transportation of sticky material ? A. Apron conveyor B. Belt conveyorC. Screw conveyor D. Pneumatic conveyor

In classification, particles are said to be equal settling, if they have the same terminal velocities in the_______________? A. Different fluids B. Same fluid C. Same field of forceD. Both B. and C.

Introduction of slurry in a plate and frame filter press is done through a plate in each frame. The plate of this filter has a _______________ surface? A. Plane B. CurvedC. Ribbed D. Either A. or B.

Which of the following clay mixing devices is vacuum operated for deairation of clay ? A. Banbury mixerB. Pug mill C. Muller-mixer D. None of these

With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge________________? A. Increases B. Decreases C. Remains constant D. Increases linearly

There is practically no alternative/competitor to _________________ in the beneficiation treatment of sulphide ores? A. Classification B. Tabling C. JiggingD. Froth floatation

Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a ______________ conveyor? A. DragB. Ribbon C. Screw D. Slat