36601. Dust collection efficiency of electrostatic precipitator can be as high as 99.9%. Maximum temperature and pressure of dust laden gas that can be cleaned in an electrostatic precipitator is respectively.
36602. For efficient grinding, ball mills must be operated
36603. In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of __________ crushing.
36604. For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter)
36605. The reduction ratio for grinders is defined as(where, Df and Dp are average diameters of feed and product respectively).
36606. Pick out the wrong statement pertaining to the turbine agitator.
36607. A fluid energy mill is used for
36608. Which meter indicate the total mileage covered?
36609. Dry powdery solid materials are transported by a __________ conveyor.
36610. Fluid energy mill comes in the category of
36611. Filtration capacity of a rotary drum vacuum filter depends upon the
36612. __________ conveyors are also called scrapers.
36613. For laminar flow of filtrate through the cake deposited on septum, which of the following will be valid ?
36614. Which of the following is a continuous filter?
36615. During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration
36616. In screen analysis, the notation +5 mm/-10 mm means particles passing through
36617. rpm of a trommel at critical speed is given by (where, D = Diameter of trommel in ft)
36618. Optimum ratio of operating speed to critical speed of a trommel is
36619. The process opposite to 'dispersion' is termed as the
36620. The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.
36621. Grinding efficiency of a ball mill is of the order of __________ percent.
36622. Solid particles of different densities are separated by
36623. During agitation of liquids, power consumption during laminar flow is not proportional to the
36624. Trommels are revolving screens which normally operate in the range of __________ rpm.
36625. The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be
36626. Maximum size reduction in a fluid energy mill is achieved by
36627. Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate)
36628. 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
36629. Which one is a filter aid ?
36630. To remove dirt from the flowing fluid, we use a
36631. Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher ?
36632. Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the
36633. Ultrafine grinders operate principally by
36634. Which of the following comes in the category of primary crusher for hard and tough stone ?
36635. Crushing efficiency of a machine ranges between __________ percent.
36636. Screen capacity is expressed in terms of
36637. A screen is said to be blinded, when the
36638. What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls ?
36639. Percentage of drum submerged in the slurry in case of rotary drum filter is
36640. Filter medium resistance is that offered by the
36641. In a roll crusher, both the rolls
36642. Tube mill compared to ball mill
36643. For the preliminary breaking of hard rock, we use a
36644. Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.
36645. Which instrument is used to measure the speed of a running vehicle?
36646. Which of the following oxides is not present in hematite iron ore?
36647. Ribbon blenders are exclusively meant for
36648. In closed circuit grinding as compared to open circuit grinding, the
36649. Steering ratio of the steering gear is the ratio between
36650. Gelatinous solid (which plug the septum) can be filtered by a __________ filter.
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