Process Equipment and Plant Design Quiz 6

Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effects in evaporation ?

The practical representative values of HETP for a number of commercial operations lies within a range of _______ metre?

The ratio of linear stress to linear strain is termed as the ______?

The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called______?

The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is______?

The minimum plate spacing in most of the petroleum refinery distillation columns (of dia > 3 ft) is normally ______ inches?

The ratio of down take area to cross-sectional area of the tube, for calandria type evaporator ranges from__________?

The average velocity in the tubes of a 1-4 heat exchanger is _______ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate ?

The normal range of velocity of steam in pipes is ___________ m/sec?

The clearance between two tubes in a shell and tube heat exchanger is known as ?ligament?, whose minimum value is ______ the outside diameter of the tube, but in no case it should be less than 4.5 mm?

The most common standard size of bubble caps used in industrial operation is_____?

The minimum shell thickness for tank ? 15 metres diameter is limited to ________ mm, for reasons of elastic stability?

The minimum tray spacing in distillation column of diameter less than 3 ft is normally ______ inches?

The ends of a cylindrical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure ?

Souders Brown equation given by, U = Kv ?(?l ? ?v)/?v, is used for the calculation of the _______ in a continuous distillation column?

The dust collection efficiency of electrostatic precipitator increases with increase in the__________?

The dust collection efficiency of a cyclone separator__________?

The distance between the centres of a rivet hole to the nearest edge of the plate is called __________?

The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the ________ stress?

The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)__________?

Speed of industrial paddle agitator ranges from ______ rpm?

The circumferential (hoop) stress in a thin walled cylindrical vessel under internal pressure is________?

The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the__________?

The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?

The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?

The longitudinal stress induced in a thin walled cylindrical vessel under internal pressure is__________?

The LMTD correction factor (FT) is defined as the ___________?

The minimum baffle height should be _______?

The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from___________?

The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the ______ stress?

The ratio of shear stress to shear strain is called ______?

The function of manholes provided in the shell of a distillation column is to ___________?

The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area ?A? is given by (where, P = perimeter of the channel in contact with the fluid) ?

The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing?

The force due to wind load acting on a tall vessel depends upon its_____?

The necessary wall thickness for a metallic storage vessel is a function of the _____?

Speed of the drum of the rotary vacuum filter normally ranges from ______ rpm?

The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is _________ cms?

The length of straight rectangular weir used on cross-flow trays is generally _________ the column diameter ?

The ratio of lateral strain to linear strain is termed as the_____?

The diameter of a propeller agitator used in agitation tank ranges from _____ percent of the tank diameter and its peripheral speed is normally 300 to 500 metres/minute ?

The operating pressure drop range in a bag filter is about _______ mm water gauge?

The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always ?

The normal range of velocity of water in pipes is ________ m/sec?

Spherical shaped pressure vessel is considered to be the most ideal, because it can_____?

The equivalent diameter for pressure drop is ________ that for heat transfer?

Steam is preferred to be used as a heating medium in heat exchangers, because of its__________?

The buckling tendency of compression members is always in the direction of the _______?

Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about ______ kcal/hr.m2.?C?

The maximum liquid gradient over a tray must not exceed___________?