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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