Process Equipment and Plant Design MCQs with answers Page - 7

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A

Admin • 802.91K Points
Coach

Q. The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.

  • (A) 1.5 to 2
  • (B) 3 to 4
  • (C) 4 to 5
  • (D) >5

A

Admin • 802.91K Points
Coach

Q. Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

  • (A) 1/10th
  • (B) 1/20th
  • (C) 1/30th
  • (D) 1/50th

A

Admin • 802.91K Points
Coach

Q. Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

  • (A) Half
  • (B) Equal to
  • (C) Twice
  • (D) Eight times

A

Admin • 802.91K Points
Coach

Q. The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.

  • (A) Equal to
  • (B) Twice
  • (C) Four times
  • (D) Half

A

Admin • 802.91K Points
Coach

Q. The retention time of material in a rotary dryer depends upon its

  • (A) Rpm
  • (B) Slope & length
  • (C) Flights arrangement
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

  • (A) Hemispherical
  • (B) Ellipsoidal (2 : 1)
  • (C) Conical
  • (D) Flat plate

A

Admin • 802.91K Points
Coach

Q. Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger

  • (A) Permits the use of less tubes in a given shell diameter
  • (B) Facilitates comparatively easier external cleaning because of large clearance
  • (C) Permits the use of more tubes in a given shell diameter
  • (D) Both B and C

A

Admin • 802.91K Points
Coach

Q. In shell and tube heat exchangers, straight tie rods are used to

  • (A) Hold baffle in space
  • (B) Fix the tubes in position
  • (C) Account for thermal strain
  • (D) None of these

A

Admin • 802.91K Points
Coach

Q. In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

  • (A) Molal flow rate of vapour
  • (B) Vapour molecular weight
  • (C) Pressure and temperature
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

  • (A) Increases
  • (B) Decreases
  • (C) Remains same
  • (D) May increase or decrease depending upon the plate spacing

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