Process Equipment and Plant Design

231. Pressure differential maintained across a continuous rotary vacuum filter is in the range of _________ mm Hg column.

  1. 50 to 100
  2. 100 to 150
  3. 250 to 500
  4. 600 to 700

Correct answer: (C)
250 to 500

232. Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as

  1. Δp = G
  2. Δp = G0.5
  3. Δp = G2
  4. Δp = 1/G0.6

Correct answer: (C)
Δp = G2

233. Pressure drop due to pipe fittings can be estimated by the equation, ΔP/ρ = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45° elbow and 180° close return bends would be respectively around

  1. 5 and 10
  2. 45 and 75
  3. 180 and 300
  4. 300 and 500

Correct answer: (B)
45 and 75

234. Pressure drop per tray in the atmospheric distillation column is about _________ psi.

  1. 0.01 - 0.5
  2. 0.07 - 0.12
  3. 0.5 - 1.0
  4. 43891

Correct answer: (B)
0.07 - 0.12

235. Rate of filtrate delivery is inversely proportional to the

  1. Filtering area & the pressure difference driving force
  2. Viscosity of filtrate
  3. Cake & filter medium resistance
  4. Both (A) and (B)

Correct answer: (D)
Both (A) and (B)

236. Ratio of tube length to shell diameter for a shell and tube heat exchanger is

  1. 8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers
  2. 4 : 1 to 8 : 1 for liquid-liquid exchanger
  3. < 4 : 1 for gas-gas exchangers
  4. Both (B) & (C)

Correct answer: (D)
Both (B) & (C)

237. Reflux ratio variation in a distillation column is between

  1. Zero and infinity
  2. Zero and one
  3. Minimum and infinity
  4. None of these

Correct answer: (C)
Minimum and infinity

238. Removable connection of tubes to tube sheet is called

  1. Ferrule
  2. Socket
  3. Nipple
  4. Saddle

Correct answer: (A)
Ferrule

239. Rivets are generally specified by the

  1. Head diameter
  2. Shank diameter
  3. Overall length
  4. None of these

Correct answer: (B)
Shank diameter

240. Rotary driers are most economically designed for the number of heat transfer units (HTU) from

  1. 0.01 to 1
  2. 1.5 to 2.5
  3. 5 to 10
  4. 10 to 20

Correct answer: (B)
1.5 to 2.5

Previous
Page 24 of 37
Next
Copyright © EngineeringMCQ.com