Process Equipment And Plant Design MCQ

Test your knowledge with important Process Equipment And Plant Design MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Process Equipment And Plant Design MCQs on Bissoy. Bissoy App

• Tube height in a calendria type evaporator is normally less than __________ metres.
  ক

  1

  খ

  2

  গ

  3.5

  ঘ

  5.5
• The units of Young's modulus of elasticity and __________ are the same.
  ক

  Strain

  খ

  Stress

  গ

  Modular ratio

  ঘ

  None of these
• In a __________ rivetted joint, the rivets in the various rows are opposite to each other.
  ক

  Zig-zag

  খ

  Chain

  গ

  Diamond

  ঘ

  None of these
• $$\frac{{{{\text{L}}_{\text{e}}}}}{{\text{D}}}$$ for 90° elbow (medium radius) and 90° square elbow would be respectively around
  ক

  25 and 60

  খ

  3 and 5

  গ

  100 and 250

  ঘ

  250 and 600
• Needle valves are generally not used for
  ক

  Very large diameter pipes

  খ

  High pressure throttling service

  গ

  Very accurate flow control

  ঘ

  Smaller sizes of pipe
• Liquid gradient over a tray can be minimised by
  ক

  Providing a higher skirt clearance or a higher weir

  খ

  Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must flow

  গ

  Using split flow, radial flow or cascade flow for column diameter large than 4 ft

  ঘ

  All of the above
• In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes
  ক

  Are easier to clean

  খ

  Are less prone to fouling

  গ

  Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less

  ঘ

  None of these
• With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.
  ক

  Fixed charges initially

  খ

  Running cost of cooling water for condenser

  গ

  Vapour & liquid load both

  ঘ

  Running cost of steam for reboiler
• Hole diameter of the seive trays in the distillation column ranges from __________ mm.
  ক

  1 to 3

  খ

  4 to 8

  গ

  3 to 12.5

  ঘ

  12.5 to 18.5
• __________ tray arrangement is recommended for distillation column having diameter upto 4 ft.
  ক

  Radial flow

  খ

  Cross flow

  গ

  Split flow

  ঘ

  Cascade
• Pick out the wrong statement about the design of seive plate column and the bubble cap column.
  ক

  The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

  খ

  Weir length for a bubble cap plate is the same as that for the seive plate

  গ

  Weir height for a bubble cap plate column is the same as that for a seive plate column

  ঘ

  Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate
• $$\frac{{{{\text{L}}_{\text{e}}}}}{{\text{D}}}$$ for fully open gate valves would be
  ক

  Much more than that for fully open globe valves

  খ

  Much less (say 2% than that for fully open globe valves)

  গ

  Around 7

  ঘ

  Both B and C
• Two iron pipes of the same nominal diameter but different schedule numbers will have the same
  ক

  Inside diameter

  খ

  Outside diameter

  গ

  Wall thickness

  ঘ

  None of these
• Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally __________ the outside diameter of the tube but in no case it should be less than 22 mm $$\left( {{{\frac{7}{8}}^{''}}} \right).$$
  ক

  Half

  খ

  Three fourth

  গ

  Equal to

  ঘ

  1.5 times
• The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from
  ক

  2 to 3

  খ

  3 to 5

  গ

  4 to 8

  ঘ

  6 to 12
• Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to
  ক

  5 cms

  খ

  40% of the I.D. of the shell

  গ

  25 cms

  ঘ

  I.D. of the shell
• Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor.
  ক

  5-10

  খ

  15-20

  গ

  30-35

  ঘ

  35-40
• Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from
  ক

  1.5-2.5

  খ

  3.5-5.5

  গ

  7.5-10.0

  ঘ

  10-15
• For pipe flows, head is proportional to __________ at constant capacity (where D = pipe diameter).
  ক

  $$\frac{1}{{\text{D}}}$$

  খ

  $$\frac{1}{{{{\text{D}}^2}}}$$

  গ

  $$\frac{1}{{{{\text{D}}^5}}}$$

  ঘ

  $${{\text{D}}^2}$$
• In a shell and tube heat exchanger, the 'tube pitch' is defined as the
  ক

  O.D. of the tube for square pitch

  খ

  Shortest distance between two adj acent tube holes

  গ

  Shortest centre to centre distance between adjacent tubes

  ঘ

  None of these
• Larger depth of liquid on the trays of a distillation column
  ক

  Leads to high tray efficiency

  খ

  Results in higher pressure drop per tray

  গ

  Both A & B

  ঘ

  Neither A nor B
• Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is
  ক

  More

  খ

  Less

  গ

  Same

  ঘ

  Cither A or B; depends upon the I.D. of the pipe
• 1.2 to 3.8 cms is the value of the
  ক

  Downcomer liquid seal in case of a balanced tray design

  খ

  Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)

  গ

  Skirt clearance for bubble caps

  ঘ

  All of the above
• The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the
  ক

  Equal sized reactors are the best

  খ

  Smaller reactor should come first

  গ

  Larger reactor should come first

  ঘ

  None of these
• In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.
  ক

  n^th

  খ

  $${\left( {\frac{1}{{\text{n}}}} \right)^{{\text{th}}}}$$

  গ

  0.5 n^th

  ঘ

  1.5 n^th
• Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.
  ক

  Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

  খ

  Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hence insulation required is less

  গ

  Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²

  ঘ

  Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²
• Spherical shaped pressure vessel is considered to be the most ideal, because it can
  ক

  Withstand higher pressure for a given metallic shell thickness

  খ

  Be fabricated very easily

  গ

  Be designed without wind load considerations

  ঘ

  Be supported very easily
• For turbine agitator, the impeller diameter is about
  ক

  0.3 to 0.5 d

  খ

  0.1 to 0.2 d

  গ

  0.65 to 0.85 d

  ঘ

  0.95 d
• For high pressure process equipments/vessels, the connected nozzle should be
  ক

  Welded

  খ

  Screwed

  গ

  Flanged

  ঘ

  Brazed
• Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.
  ক

  Less than

  খ

  More than

  গ

  Same as

  ঘ

  Either more or less (depending upon relative volatility)