A. Produces mainly axial flow
B. Is used for mixing high viscosity pastes
C. Runs at very slow speed (2 rpm)
D. All A., B. and C.
Related Mcqs:
- Toothed roll crushers achieve size reduction by___________________?
A. Tearing (shear) and compression
B. Impact and attrition
C. Both A. & B.
D. Neither A. nor B. - A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _______________ flow of filtrate?
A. Compressible cakes and laminar
B. Incompressible cake and laminar
C. Compressible cake and turbulent
D. Incompressible cake and turbulent - Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the ___________________?
A. Light metal powder down upto 4 mesh size
B. Dry chemicals
C. Heavy tonnages of rocks or gravel
D. Powdered food & granular materials - Which of the following is a continuous filter ?
A. Plate and frame filter
B. Cartridge filter
C. Shell and leaf filter
D. None of these - Trommels are revolving screens which normally operate in the range of _______________ rpm?
A. 1 – 2
B. 15 – 20
C. 40 – 50
D. 60 – 75 - In case of grinding in a ball mill__________________?
A. Wet grinding achieves a finer product size than dry grinding
B. Its capacity decreases with increasing fineness of the products
C. Grinding cost and power requirement increases with increasing fineness of the products
D. All A., B. and C - A 30% (by volume) suspension of spherical sand particles in a viscous oil has a hindered settling velocity of 4.44 μm/s. If the Richardson Zaki hindered settling index is 4.5, then the terminal velocity of a sand grain is_________________?
A. 0.90 μm/s
B. 1 μm/s
C. 22.1 μm/s
D. 0.02 μm/s - Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a ______________ conveyor?
A. Flight
B. Slat or drag
C. Ribbon
D. Screw - Tank filter (e.g., Nutsche filter) is___________________?
A. A high pressure filter
B. A continuous filter
C. Used for small scale filtration work
D. A leaf filter - The work index in Bond’s law for crushing of solids has the following dimensions__________________?
A. No units (dimensionless)
B. kWh/ton
C. kW/ton
D. kWh.m1/2/ton
