21701. In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be
21702. Raschig ring made of procelain cannot be used for treating concentrated
21703. H2S present in naphtha reformed gas is removed by absorbing with
21704. During constant rate drying period, vaporisation rate per unit drying surface area
21705. Which type of tool is used to tighten bolt and nut with specified torque?
21706. In rectifying section of a continuous distillation column, the
21707. For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams
21708. According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to
21709. A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is
21710. Minimum reflux ratio in a distillation column results in
21711. Flooding in a distillation column is detected by a sharp
21712. In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)
21713. Two type of fuel supply system used in SI engine are
21714. In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.
21715. At constant pressure, with increase of temperature, the dew point will
21716. For a single component absorber, the operating line is straight only when plotted in term of __________ units.
21717. In case of unsaturated air
21718. For a binary mixture with low relative volatility,
21719. Plate efficiency
21720. Absorption accompanied by heat evolution results in
21721. Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the
21722. For a distillation column operating at minimum reflux, the
21723. A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))
21724. Flash distillation is suitable for the separation of components
21725. In Mcabe-Thiele method, at infinite reflux ratio
21726. Leaching rate is independent of the
21727. Use of packed towers for distillation is generally limited to the
21728. In the clutch disc,the torsional vibrations is absorbed by the
21729. Which of the following decreases during evaporative cooling process with recirculated water supply ?
21730. Laboratory determination of the dif-fusivity of vapor is done by __________ method.
21731. The minimum liquid rate to be used in an absorber corresponds to an operating line
21732. Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be
21733. For absorbing a sparingly soluble gas in a liquid, the
21734. A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.
21735. The boiling points of pure components of a binary system __________ with increase in total pressure of the system.
21736. The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the
21737. Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as
21738. Desulphurisation of petrol is done in a
21739. Chemisorption compared to physical absorption has
21740. Rate of adsorption increases as the
21741. Pick out the system with maximum boiling azeotrope at 1 atm.
21742. At 750°K and 1 atm, the approximate value of Schmidt number for air is
21743. Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.
21744. The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if
21745. Total strength of the UN at present is?
21746. Which of the following is used for the concentration of rubber latex ?
21747. As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages
21748. In triangular co-ordinates, the ternery composition point falls __________ of the triangle.
21749. In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)
21750. Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time)