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.Management Sciences
Category: Process Equipment and Plant Design
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_________________?
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A. Equal sized reactors are the best
B. Smaller reactor should come first
C. Larger reactor should come first
D. None of these
Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally ____________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8″)?
A. Half
B. Three fourth
C. Equal to
D. 1.5 times
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 ?
A. To increase the residence time of shell side fluid
B. To provide support to the tube bundle
C. To reduce the induced vibration in the tubes
D. To increase the tube side heat transfer co-efficient by inducing turbulence
Spherical shaped pressure vessel is considered to be the most ideal, because it can___________________?
A. Withstand higher pressure for a given metallic shell thickness
B. Be fabricated very easily
C. Be designed without wind load considerations
D. Be supported very easily
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