Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent
Paper industry employs __________ driers.
Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of h2/ky.Cz is around
Pick out the wrong statement:
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its
The wetted wall tower is used to determine
The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law.
Prandtl number for water at 20°C is about
Make up water is supplied during cooling tower operation to compensate for water losses due to
In case of constant underflow extraction operation, the __________ at all solute concentration.
Water entrained by circulating air in cooling towers is termed as
The rate of mass transfer is not dependent upon the
When the feed to a distillation column is a saturated liquid, slope of the feed line is
In distillation column design, the McCabe-Thiele procedure is inadequate and a Ponchan-Savarit procedure is needed, when
Critical humidity of a solid salt means the humidity
The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are
A slurry is to be dried to produce flaky solid. Which dryer would you recommend ?
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent ?
The reciprocal of stripping factor is termed as
In paper industry, paper is dried in a __________ dryer.
The minimum number of theoretical plates is required for achieving a given separation in distillation column with
Weight of 1 m3 of humid air as compared to 1 m3 of dry air, under the same conditions, is
Leaching of uranium ore and gold ore is done in
Pick out the wrong statement.
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.)
To get high tray efficiency
Acm xcm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It tookseconds for the weight of the sheet to reduce to 1.kg. Anotherxx 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is
__________ extractor uses centrifugal force for separating the two phases.
Large scale drying of wheat is done in a __________ dryer.
Leaching of sugar from sugar beets is done by
In an interphase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be
Ponchan-Savarit method analyses the fractional equipment based on
Blowdown in a cooling tower
With increase in temperature, the leaching rate increases because of the
The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is
Pick out the wrong statement. Generally for physical adsorption, a gas of
With increase in temperature, the rate of leaching increases, because the
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.
In a binary distillation column, if the feed containsmole % vapour, the q line will have a slope of
Azeotropic distillation is employed to separate
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )
As the reflux ratio decreases, the
During constant rate period, the rate of drying decreases with the
In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in
Pick out the wrong statement.
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes
Antibiotics are best handled in a
Acetic acid will be most economically separated from a dilute solution of acetic acid in water by