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.Management Sciences
Category: Process Equipment and Plant Design
The ratio of shear stress to shear strain is called ____________________?
A. Bulk modulus
B. Shear modulus
C. Modulus of rigidity
D. Modulus of elasticity
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of_________________?
A. (1.2)3/2
B. (1.2)3/5
C. (1.2)2/3
D. (1.2)5/3
Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is ___________________?
A. More
B. Less
C. Same
D. Either A. or B.; depends upon the I.D. of the pipe
A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design____________________?
A. Only if the opening is on spherical vessel
B. Only if the opening is on a vertical cylindrical vessel
C. Only if the opening is on a horizontal cylindrical vessel
D. Irrespective of the shape of the vessel
____________ is the determining factor for the number of bubble caps to be used per tray?
A. Permissible slot velocity
B. Tray diameter
C. Liquid load
D. Vapor load
Which of the following packing materials provides for maximum mass transfer ?
A. Raschig rings
B. Raschig rings
C. Cross-partition rings
D. All give the same value
Cylindrical shell thickness of rotary drier is generally _______________ mm?
A. 2-3
B. 18-22
C. 6-8
D. 12-15
In distillation columns, bubble caps are held in place over trays by ________________?
A. Rivets
B. A hold down bar
C. Bolts
D. Both B. and C.
With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will________________?
A. Increase
B. Decrease
C. Remain unaffected
D. Increase or decrease depending on the nature of the dust
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