Tube height in a calendria type evaporator is normally less than __________ metr

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Question
Tube height in a calendria type evaporator is normally less than __________ metres.
Options
A. 1
B. 2
C. 3.5
D. 5.5

Correct Answer

2

Process Equipment and Plant Design problems

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1. Pick out the wrong statement pertaining to shell and tube heat exchanger.
Options
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.

2. Optimum economic pipe diameter for fluid flow is determined by the
Options
A. viscosity of the fluid.
B. density of the fluid.
C. total cost considerations (pumping cost plus fixed cost of the pipe).
D. none of these.

4. Filtration rate is affected by the
Options
A. pressure drop across the cake & filter medium.
B. cake & filter medium resistance.
C. area of filtering surface & the viscosity of filtrate.
D. all (a), (b) and (c).

6. A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is
Options
A. bending
B. deformation
C. shear
D. elongation

7. Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation
Options
A. increases capacity.
B. increases economy.
C. does not affect the capacity.
D. both 'b' & 'c'.

8. Souders Brown equation given by, , is used for the calculation of the __________ in a continuous distillation column.
Options
A. diameter of the bubble cap column
B. diameter of the seive plate column
C. tray pressure drop
D. residence time in the downcomer for the disengagement of entrained vapour

10. The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always
Options
A. 1
B. < 1
C. >1
D. equal to the order of reaction

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