Chemical Plant Design Equipment Online Test - Set 24 - ObjectiveBooks

Chemical Plant Design Equipment Online Test - Set 24

Practice Test: Question Set - 24

1. For high pressure process equipments/vessels, the connected nozzle should be
    (A) Welded
    (B) Screwed
    (C) Flanged
    (D) Brazed

2. In case of bubble cap distillation column of diameter greater than 1.2 meters, the cap diameter is roughly about _________ cms.
    (A) 10
    (B) 20
    (C) 30
    (D) 35

3. 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) Remain same
    (D) May increase or decrease depending upon the plate spacing

4. _________ tray arrangement is recommended for distillation column having diameter upto 4 ft.
    (A) Radial flow
    (B) Cross flow
    (C) Split flow
    (D) Cascade

5. Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure?
    (A) Larger dia vessel
    (B) Smaller dia vessel
    (C) Larger dia long vessel
    (D) Strength of the vessel is same irrespective of the diameter

6. Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is
    (A) More
    (B) Less
    (C) Same
    (D) Either (a) or (b); depends upon the I.D. of the pipe

7. For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurized cylindrical vessel, what value of weld joint efficiency should be used?
    (A) 0.8
    (B) 0.9
    (C) 1.0
    (D) (0.8)0.5

8. Speed of the drum of the rotary vacuum filter normally ranges from _________ rpm.
    (A) 0.1 to 2
    (B) 5 to 7
    (C) 3 to 8
    (D) 8 to 15

9. 25 per cent cut segmental baffle means that the baffle
    (A) Height is 75% of the I.D. of the shell
    (B) Height is 25% of the I.D. of the shell
    (C) Spacing is 75% of its height
    (D) Width is 25% of its height

10. In a continuous distillation column, the optimum reflux ratio ranges from _________ times the minimum reflux ratio.
    (A) 1.1 to 1.5
    (B) 1.6 to 2
    (C) 2.2 to 2.6
    (D) 2.7 to 3

11. In a shell and tube heat exchanger, the 'tube pitch' is defined as the
    (A) O.D. of the tube for square pitch
    (B) Shortest distance between two adjacent tube holes
    (C) Shortest center to center distance between adjacent tubes
    (D) None of these

12. The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is _________ stress.
    (A) Shear
    (B) Tensile
    (C) Compressive
    (D) Thermal

13. A riveted joint does not fail by _________ of rivets.
    (A) Tearing
    (B) Shearing
    (C) Tearing of the plate across a row
    (D) None of these

14. Reflux ratio variation in a distillation column is between
    (A) Zero and infinity
    (B) Zero and one
    (C) Minimum and infinity
    (D) None of these

15. 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
    (A) More
    (B) Same
    (C) Less
    (D) Twice

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