Search
.Management Sciences
Category: Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a basket type evaporator ?
A. It is used for high viscosity liquor having large rate of scaling
B. The tube bundle is suspended on bracket
C. There is no central downtake
D. Downtake is formed by the annular space between the bundle and the shell
Hole diameter of the sieve trays in the distillation column ranges from ______________ mm?
A. 1 to3
B. 4 to 8
C. 3 to 12.5
D. 12.5 to 18.5
Value of Peclet number = ∞, is the representative of___________________?
A. Laminar flow
B. Complete back mixing
C. Plug flow
D. Eddy diffusivity = 0
________________ liquor is best handled in a long tube vertical evaporator ?
A. Foamy
B. Scaling
C. Viscous
D. Salting
Diameter of bubble caps used in high pressure columns is ______________ as compared to that used in identical vacuum columns?
A. Less
B. More
C. Same
D. Either A. or B.; no generalisation can be made
Generally, elliptical dished heads____________________?
A. Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for
pressure vessels operating above a pressure of 1.5 MN/m2
B. Resist half the pressure rating compared to hemi spherical head provided on the cylindrical
shell of the same thickness and diameter
C. Are approximately as strong as seamless cylindrical shell having the corresponding I.D and
O.D
D. All A., B. and C.
____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?
A. Hemispherical
B. Dished
C. Ellipsoidal
D. Conical
Which of the following efficiencies can be greater than 100% ?
A. Overall plate efficiency
B. Murphree plate efficiency
C. Point efficiency
D. None of these
Longitudinal stress induced in a thin walled cylindrical storage vessel is __________________?
A. pD/2t
B. pD/4t
C. pD/3t
D. pD/6t
Recent Comments