Work index is defined as the
Work index is defined as the
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 )
Sulphuric acid mist is arrested by using a __________ scrubber.
Sulphuric acid mist is arrested by using a __________ scrubber.
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?
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
Gravity settling process is not involved in the working of a
Gravity settling process is not involved in the working of a
The filter medium resistance is controlled by
The filter medium resistance is controlled by
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
The energy consumed by a ball mill depends on
The energy consumed by a ball mill depends on
Driving force in case of filtration by a centrifuge is the
Driving force in case of filtration by a centrifuge is the
The capacity of a pneumatic conveying system depends upon the
The capacity of a pneumatic conveying system depends upon the
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
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
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
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
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 conveyors cannot be recommended for transportation of abrasive materials?
Which of the following conveyors cannot be recommended for transportation of abrasive materials?
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
Filtration capacity of a rotary drum vacuum filter depends upon the
Filtration capacity of a rotary drum vacuum filter depends upon the
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
Mixer used for rubber compounding is
Mixer used for rubber compounding is
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?
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.
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
Which of the following is not a wet classifier?
Which of the following is not a wet classifier?
Which of the following minerals is not subjected to magnetic separation method?
Which of the following minerals is not subjected to magnetic separation method?
Gravity stamp mill is meant for the __________ crushing.
Gravity stamp mill is meant for the __________ crushing.
Moisture can be removed from lubricating oil using
Moisture can be removed from lubricating oil using
Limestone is normally crushed in a
Limestone is normally crushed in a
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
Pick out the wrong statement.
Pick out the wrong statement.
__________ conveyors are also called scrapers.
__________ conveyors are also called scrapers.
The most common filter aid is
The most common filter aid is
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
Froth floatation is the most suitable for treating
Froth floatation is the most suitable for treating
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.
__________ 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.
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.
Which of the following is not a cutting machine?
Which of the following is not a cutting machine?
Which one is a filter aid?
Which one is a filter aid?
To produce talcum powder, use
To produce talcum powder, use
Maximum size reduction in a fluid energy mill is achieved by
Maximum size reduction in a fluid energy mill is achieved by
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.
Which of the following is the hardest material?
Which of the following is the hardest material?
Pick out the wrong statement.
Pick out the wrong statement.
For transporting pasty material, one will use a/an
For transporting pasty material, one will use a/an
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.
The main differentiation factor between tube mill and ball mill is the
The main differentiation factor between tube mill and ball mill is the
Tube mill compared to ball mill
Tube mill compared to ball mill
__________ is used for producing a thick suspension from a thin slurry.
__________ is used for producing a thick suspension from a thin slurry.
Which of the following is the softest material?
Which of the following is the softest material?
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.
Mixing of light fine powder such as insecticides is done by
Mixing of light fine powder such as insecticides is done by
Size reduction of __________ is accomplished in steam heated rollers and roll crushers.
Size reduction of __________ is accomplished in steam heated rollers and roll crushers.
