Chemical Engineering Fluid Mechanics Viva Questions - Set 45 - ObjectiveBooks
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# Practice Test: Question Set - 45

1. Hydraulic intensifier is used for increasing the
(A) Rate of velocity of liquid supply
(B) Rate of flow through delivery pipeline of a pump
(C) Intensity of pressure of the liquid
(D) Momentum rate through delivery pipe

2. One dimensional fluid flow implies the
(A) Flow in straight lines only
(B) Uniform flow
(D) Flow in which transverse components are zero

3. The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by (where, x = each side of the square duct).
(A) x
(B) √(πx)
(C) √(2x)
(D) √(x/2)

4. For laminar flow through a closed conduit
(A) Vmax = 2Vav
(B) Vmax = Vav
(C) Vmax = 1.5Vav
(D) Vmax = 0.5Vav

5. The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is
(A) 0.5
(B) 1
(C) 2
(D) 0.66

6. Each term in Bernoulli’s equation represents the __________ of the fluid.
(A) Energy per unit mass
(B) Energy per unit weight
(C) Force per unit mass
(D) None of these

7. Nature of fluid flow during the opening of a valve in a pipeline is
(A) Laminar
(D) Uniform

8. For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is
(A) More
(B) Less
(C) Equal
(D) Independent of porosity

9. Capacity of a hydraulic accumulator is defined in terms of maximum
(A) Amount of energy stored
(B) Flow rate through accumulator
(C) Rate of falling of ram
(D) Volume available in the cylinder

10. The nominal size of a hose pipe is specified by its
(A) I.D.
(B) O.D.
(C) Thickness
(D) None of these

11. The continuity equation in ideal fluid flow states that
(A) Net rate of inflow into any small volume must be zero
(B) Energy is not constant along a streamline
(C) Energy is constant along a streamline
(D) There exists a velocity potential

12. 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

13. With increase in the temperature, viscosity of a liquid
(A) Increases
(B) Decreases
(C) Remain constant
(D) May increase or decrease; depends on the liquid

14. An equipotential line is __________ to the velocity vector at every point.
(A) Normal
(B) Parallel
(C) Tangential
(D) None of these

15. The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is
(A) Hyperbolic
(B) Parabolic
(C) Linear
(D) None of these

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