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.Management Sciences
Category: Process Equipment and Plant Design
Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate ?
A. Triangular pitch
B. Square pitch
C. Diagonal square pitch
D. Heat transfer rate is independent of tube arrangement
In condenser, the cooling water is passed in the tube side in a pass arrangement, because________________?
A. It reduces heat transfer area
B. More thinner tubes can be used
C. Pressure drop is reduced
D. It makes condenser compact
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for______________?
A. Reducing scale deposition
B. Increasing pressure drop
C. Fixing the tubes
D. Creating turbulence
Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation ?
A. Sorel-Lewis method
B. McCabe-Thiele’s method
C. Ponchon-Savarit method
D. None of these
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by______________?
A. An increase in liquid viscosity
B. An increase in relative volatility for rectification columns
C. Decrease in gas solubility for absorbers
D. All A., B. and C.
Which of the following types of reactors is the safest from operation point of view ?
A. A vapor phase reactor
B. Pot type reactor
C. A liquid phase reactor
D. A liquid phase catalytic reactor
For a given design of bubble cap, the number of bubble caps to be used per tray is set by the _________________?
A. Allowable gas velocity through the slots
B. Plate spacing
C. Diameter of the column
D. All A., B. and C.
Pick out the wrong statement pertaining to shell and tube heat exchanger_______________?
A. Clearance between shell & baffles and between tube & baffles should be minimum to avoid
by-passing of the fluid, but it should be enough to permit the removal of tube bundle
B. Baffles are supported independently of the tubes by tie rods and positioned by spacers
C. Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum
number of tie rods is 4 with at least 10 mm diameter
D. Bracket supports are used for horizontal shell, while saddle support is used for vertical shell
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