Chemical Engineering Fluid Dynamics Multiple Choice Questions - Set 27 - ObjectiveBooks

Chemical Engineering Fluid Dynamics Multiple Choice Questions - Set 27

Practice Test: Question Set - 27

1. Differential manometer measures the
    (A) Atmospheric pressure
    (B) Sub-atmospheric pressure
    (C) Pressure difference between two points
    (D) None of these

2. The maximum delivery pressure of compressors can be upto __________ atmospheres.
    (A) 10
    (B) 100
    (C) 250
    (D) 1000

3. With increase in temperature, the vapor pressure of liquids
    (A) Increases
    (B) Increases linearly
    (C) Decreases
    (D) Remain constant

4. Dean number is concerned with the
    (A) Fluid-particle interaction
    (B) Fluid flow through helical pipes
    (C) Power consumption in agitated vessels
    (D) Psychrometry

5. Medium viscosity lubricating oil can be most ideally pumped by a __________ pump.
    (A) Vane
    (B) Piston
    (C) Centrifugal
    (D) Plunger

6. Pick out the wrong statement.
    (A) Momentum transfer in laminar flow results from velocity gradient
    (B) A fluid in equilibrium is not free from shear stress
    (C) The viscosity of a non-Newtonian fluid is a function of temperature only
    (D) Both (b) and (c)

7. Remote control valve is a __________ valve.
    (A) Gate
    (B) Butterfly
    (C) Needle
    (D) Globe

8. A pipe is defined as 'hydraulically smooth', if the friction factor
    (A) Is not a function of Reynolds number
    (B) For a given Reynolds number remains constant even on further smoothening of the pipe
    (C) Is zero irrespective of the Reynolds number
    (D) None of these

9. Most of the centrifugal pumps used in chemical plants are usually __________ driven.
    (A) Steam
    (B) Diesel engine
    (C) Electric motor
    (D) Gas turbine

10. Pick out the correct statement.
    (A) A forced vortex occurs when fluid rotates as a solid about an axis
    (B) In laminar flow, Newton's law of viscosity does not apply
    (C) A free vortex occurs, when fluid rotates as a solid
    (D) In turbulent flow, there are neither cross-currents nor eddies

11. The uniformity of a gas fluidized bed depends upon the __________ of the solid particles.
    (A) Size
    (B) Surface properties
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

12. Pick out the wrong statement.
    (A) In a static mass of liquid, the pressure at a point is the same for all liquids
    (B) Pressure decreases exponentially with elevation in an isothermal atmosphere
    (C) Atmospheric pressure = absolute pressure ‒ gage pressure
    (D) As per Pascal's law, the pressure at a point in a static or uniformly moving fluid is equal in all directions

13. Permanent loss in a Venturimeter is about __________ percent of the pressure drop in the upstream cone.
    (A) 1
    (B) 10
    (C) 40
    (D) 70

14. The normal stress is the same in all directions at a point in a fluid, when the fluid is
    (A) Non-viscous
    (B) Incompressible
    (C) Both (a) and (b)
    (D) Having no motion of one fluid layer relative to the other

15. Mass velocity is independent of temperature & pressure, when the flow is
    (A) Unsteady through unchanged cross-section
    (B) Steady through changing cross-section
    (C) Steady and the cross-section is unchanged
    (D) Unsteady and the cross-section is changed

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