With increase in drum speed, in a rotary drum filter, the filtration rate
With increase in drum speed, in a rotary drum filter, the filtration rate
Maximum size reduction in a fluid energy mill is achieved by
Maximum size reduction in a fluid energy mill is achieved by
For a cyclone of diameter 0.2 m with a tangential velocity of 15 m/s at the wall, the separation factor is
For a cyclone of diameter 0.2 m with a tangential velocity of 15 m/s at the wall, the separation factor is
Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a __________ conveyor.
Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a __________ conveyor.
Sulphuric acid mist is arrested by using a __________ scrubber.
Sulphuric acid mist is arrested by using a __________ scrubber.
Which of the following is not a non-metalliferous mineral?
Which of the following is not a non-metalliferous mineral?
Pick out the wrong statement.
Pick out the wrong statement.
Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a __________ conveyor.
Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a __________ conveyor.
Which of the following minerals is not subjected to magnetic separation method?
Which of the following minerals is not subjected to magnetic separation method?
Moisture can be removed from lubricating oil using
Moisture can be removed from lubricating oil using
To produce talcum powder, use
To produce talcum powder, use
__________ conveyors are also called scrapers.
__________ conveyors are also called scrapers.
Limestone is normally crushed in a
Limestone is normally crushed in a
Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called
Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a
Fluid medium used in the classification technique of mineral beneficiation is
Fluid medium used in the classification technique of mineral beneficiation is
In the cyclone separator used for separation of dust from dust laden gas, the gas
In the cyclone separator used for separation of dust from dust laden gas, the gas
Mixing of light fine powder such as insecticides is done by
Mixing of light fine powder such as insecticides is done by
A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is
A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is
The energy consumed by a ball mill depends on
The energy consumed by a ball mill depends on
__________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals.
__________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals.
Gravity settling process is not involved in the working of a
Gravity settling process is not involved in the working of a
Which of the following is the softest material?
Which of the following is the softest material?
The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be __________ cms.
The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be __________ cms.
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
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
Driving force in case of filtration by a centrifuge is the
Driving force in case of filtration by a centrifuge is the
In a roll crusher, the specific power consumption and the production rate is affected by the
In a roll crusher, the specific power consumption and the production rate is affected by the
The capacity of a pneumatic conveying system depends upon the
The capacity of a pneumatic conveying system depends upon the
Electrical energy consumed by a jaw crusher is not a function of the
Electrical energy consumed by a jaw crusher is not a function of the
Which of the following is not used as a surface active agent in a flocculation operation?
Which of the following is not used as a surface active agent in a flocculation operation?
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is
Mass flow of granular solid (M) through a circular opening of dia, D follows
Mass flow of granular solid (M) through a circular opening of dia, D follows
Which of the following is the hardest material?
Which of the following is the hardest material?
Coal is finally pulverised to 200 mesh size for burning in boilers by a
Coal is finally pulverised to 200 mesh size for burning in boilers by a
Work index is defined as the
Work index is defined as the
Filtration capacity of a rotary drum vacuum filter depends upon the
Filtration capacity of a rotary drum vacuum filter depends upon the
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?
The main differentiation factor between tube mill and ball mill is the
The main differentiation factor between tube mill and ball mill is the
Which one is a filter aid?
Which one is a filter aid?
Gravity stamp mill is meant for the __________ crushing.
Gravity stamp mill is meant for the __________ crushing.
Tube mill compared to ball mill
Tube mill compared to ball mill
The most common filter aid is
The most common filter aid is
Froth floatation is the most suitable for treating
Froth floatation is the most suitable for treating
For transporting pasty material, one will use a/an
For transporting pasty material, one will use a/an
__________ is used for producing a thick suspension from a thin slurry.
__________ is used for producing a thick suspension from a thin slurry.
Production rate __________ with increased fineness, with a given energy input to the size reduction machine.
Production rate __________ with increased fineness, with a given energy input to the size reduction machine.
Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate)
Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate)
In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the
In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the
Mixer used for rubber compounding is
Mixer used for rubber compounding is
The filter medium resistance is controlled by
The filter medium resistance is controlled by
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?
Size reduction of __________ is accomplished in steam heated rollers and roll crushers.
Size reduction of __________ is accomplished in steam heated rollers and roll crushers.
As per Taggart's formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms )
As per Taggart's formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms )
Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.
Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.
Pick out the wrong statement.
Pick out the wrong statement.
Which of the following is not a cutting machine?
Which of the following is not a cutting machine?
Pick out the wrong statement.
Pick out the wrong statement.
Which of the following is not a wet classifier?
Which of the following is not a wet classifier?
