Process Equipment and Plant Design

341. What is the slope of the operating line in the rectifying section of a distillation column?

  1. 0
  2. ∞
  3. > 1
  4. <1

Correct answer: (D)
<1

342. What is the slope of the operating line in the stripping section of a distillation column ?

  1. 0
  2. ∞
  3. > 1
  4. < 1

Correct answer: (C)
> 1

343. What is the value of 'q' for saturated vapor feed to a distillation column? (where q = fraction of the feed stream that is liquid.)

  1. 0
  2. 1
  3. < 0
  4. > 1

Correct answer: (A)
0

344. When one of the fluids is highly corrosive and has fouling tendency, it should

  1. Preferably flow inside the tube for its easier internal cleaning
  2. Preferably flow outside the tube
  3. Flow at a very slow velocity
  4. Flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current

Correct answer: (A)
Preferably flow inside the tube for its easier internal cleaning

345. Which of the following efficiencies can be greater than 100%?

  1. Overall plate efficiency
  2. Murphree plate efficiency
  3. Point efficiency
  4. None of these

Correct answer: (B)
Murphree plate efficiency

346. Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower?

  1. Size, shape, orientation and surface of the packing particles
  2. Density and viscosity of fluids
  3. Fluid flow rates
  4. All (A), (B) and (C)

Correct answer: (D)
All (A), (B) and (C)

347. Which of the following factors determine the amount of entrainment in a distillation column?

  1. Plate spacing
  2. Depth of liquid above the bubble cap slots
  3. Vapour velocity in the volume between the plates
  4. All (A), (B) and (C)

Correct answer: (D)
All (A), (B) and (C)

348. 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?

  1. Sorel-Lewis method
  2. McCabe-Thiele's method
  3. Ponchon-Savarit method
  4. None of these

Correct answer: (A)
Sorel-Lewis method

349. Which of the following is the best tube material from thermal conductivity point of view alone?

  1. Aluminium
  2. Stainless steel
  3. Copper
  4. Carbon steel

Correct answer: (C)
Copper

350. Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger?

  1. 75% cut segmental baffle
  2. 25% cut segmental baffle
  3. Orifice baffle
  4. Disk and doughnut baffle

Correct answer: (B)
25% cut segmental baffle

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