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.Management Sciences
Category: Process Equipment and Plant Design
What is the slope of the feed line, if the feed to a distillation column is a saturated liquid ?
A. 0
B. ∞
C. > 1
D. < 1
Value of Peclet number = 0, is the representative of ____________________?
A. Laminar flow
B. Complete back mixing
C. Plug flow
D. Eddy diffusivity = 0
Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle ?
A. Segmental baffle
B. Flat plate extending across the wall
C. Disk type baffle
D. Helical type baffle
Rate of filtrate delivery is inversely proportional to the___________________?
A. Filtering area & the pressure difference driving force
B. Viscosity of filtrate
C. Cake & filter medium resistance
D. Both A. and B.
In a vertical short tube evaporator (Calandria type), the ______________________?
A. Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylindrical drum dia of 1-6 metres are
normally used
B. Area of central downtake is equal to 40 to 100% of total cross-sectional area of the
surrounding tube
C. Liquor is inside the tube while the steam is outside the tube
D. All A., B. & C.
In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a __________________?
A. Clearance of 25-75 mm
B. Cap pitch of 1.3-2 times the cap diameter
C. Either A. or B.
D. Neither A. nor B.
The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is ______________ stress?
A. Shear
B. Tensile
C. Compressive
D. Thermal
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________?
A. 0.4-0.6
B. 0.35-0.75
C. 0.1-0.2
D. 0.55-0.85
(Le/D) for fully open gate valves would be __________________?
A. Much more than that for fully open globe valves
B. Much less (say 2% than that for fully open globe valves)
C. Around 7
D. Both B. and C.
Slope of counter-current flow rotary drier is in the range of ____________ meter/metre?
A. 0 to 0.08
B. 0 to 0.8
C. 0 to 1.5
D. 0 to 2.2
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