Which of the following comes in the category of primary crusher for hard and tough stone ?
A. Jaw crusher
B. Cone crusher
C. Gyratory crusher
D. None of these
Mechanical Operations
Mesh indicates the number of holes per_________________?
Mesh indicates the number of holes per_________________?
A. Square inch
B. Linear inch
C. Square foot
D. Linear foot
Which of the following conveyors cannot be recommended for transportation of abrasive materials ?
Which of the following conveyors cannot be recommended for transportation of abrasive materials ?
A. Belt conveyor
B. Apron conveyor
C. Flight conveyor
D. Chain conveyor
For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the ______________ filter?
For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the ______________ filter?
A. Plate & frame
B. Shell & leaf
C. Sand
D. Rotary vacuum
Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ρ = bulk density of material, kg/m3) ?
Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ρ = bulk density of material, kg/m3) ?
A. 3.6 W.D.V.ρ
B. 3.6 W.D.V
C. 3.6 W.V.ρ
D. 3.6 D.V.ρ
Addition of filter aid to the slurry before filtration is done to _______________ of the cake?
Addition of filter aid to the slurry before filtration is done to _______________ of the cake?
A. Increase the porosity
B. Increase the compressibility co-efficient
C. Decrease the porosity
D. Decrease the compressibility co-efficient
Sulphuric acid mist is arrested by using a ____________ scrubber?
Sulphuric acid mist is arrested by using a ____________ scrubber?
A. Packed wet
B. Hollow wet
C. Venturi
D. Co-current
Which of the following must be stored in silos and not in open yard ?
Which of the following must be stored in silos and not in open yard ?
A. Coke breeze
B. High V.M. bituminous coal
C. Sand
D. None of these
Froth floatation is the most suitable for treating ____________________?
Froth floatation is the most suitable for treating ____________________?
A. Iron ores
B. Sulphide ores
C. Quartzite
D. None of these
Mixer used for rubber compounding is__________________?
Mixer used for rubber compounding is__________________?
A. mixer-extruder
B. Banbury internal mixer
C. Muller mixer
D. Pug mill