Process Equipment and Plant Design

241. Saddle supports are used for supporting _________ vessels.

1. Horizontal cylindrical
2. Tall vertical
3. Thick walled vertical
4. Thick spherical

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242. Safety valves are provided in chemical equipments to guard against excessive

1. Temperature
2. Pressure/pressure fluctuation
3. Turbulence
4. Noise

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243. Scale up problem in design based on the similarity concept takes into account _________ similarity.

1. Geometrical
2. Kinematic
3. Dynamic
4. All (A), (B) and (C)

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244. Seamless pipe is made

1. From rolled strips formed into cylinders and seam-welded
2. By extrusion & casting into static and centrifugal molds
3. By forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing
4. Both (B) and (C)

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245. Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is

1. More
2. Same
3. Less
4. Twice

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246. Shortest distance between two tubes is

1. Called tube pitch
2. Called tube clearance
3. More in case of triangular pitch as compared to square pitch of tube layout
4. None of these

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247. Slope of counter-current flow rotary drier is in the range of _________ meter/metre.

1. 0 to 0.08
2. 0 to 0.8
3. 0 to 1.5
4. 0 to 2.2

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248. Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than _________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.

1. 25
2. 50
3. 75
4. 150

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249. Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

1. Relative volatility is close to one (e.g., separation of close boiling isomers)
2. Feed is not at its bubble point
3. Number of equilibrium stages in only stripping section is to be calculated
4. Number of equilibrium stages required is likely to be very small

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250. Souders Brown equation given by, U = Kv √(ρl - ρ_v)/ρ_v, is used for the calculation of the _________ in a continuous distillation column.

1. Diameter of the bubble cap column
2. Diameter of the sieve plate column
3. Tray pressure drop
4. Residence time in the downcomer for the disengagement of entrained vapour

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