Related Mcqs:

1. A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be _______________ cms?

   A. 17
   B. 42
   C. 84
   D. 1.8

2. Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?

   A. H
   B. 12.6 H
   C. 13.6 H
   D. 14.6 H

3. Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of ______________ pressure?

   A. Small differential
   B. Atmospheric
   C. Absolute
   D. Gage

4. Very small pressure difference (< 5 mm water column) can be most conveniently measured by a/an _____________ manometer?

   A. U-tube water
   B. U-tube mercury
   C. Inclined tube mercury
   D. Inclined tube water

5. Correction for capillary effect in manometers (used for pressure measurement) need not be applied, if diameter of the manometer tube is _____________ mm?

   A. 4
   C. > 12.5
   D. < 10

6. Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m3, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is________________?

   A. 90
   B. 60
   C. 45
   D. 30

7. Two liquids manometer is used for measuring small pressure differences in___________________?

   A. Liquids
   B. Gases
   C. Mixture of hydrocarbons
   D. None of these

8. A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any „x‟? Assume incompressible one dimensional flow i.e., no gradients in the radial direction ?

   A. VX = V0 + q (x3/L2D)
   B. VX = V0 + ⅓q (x3/L2)
   C. VX = V0 + 2q (x2/LD)
   D. VX = V0 + (4/3) q (x3/L2D)

9. Pressure drop for turbulent fluid flow through a circular pipe is given by_________________?

   A. 64/Re
   B. 32μLV/gc.D2
   C. 4f (L/D) (v2/2gc). ρ
   D. f (L/D) (v2/2gc). ρ

10. The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides ‘x’ & ‘y’ is given by_________________?

    A. 2xy/(x + y)
    B. xy/(x + y)
    C. (x + y)/2xy
    D. (x + y)/xy