Chemical Engineering Fluid Mechanics Quiz Test Questions - Set 46 - ObjectiveBooks
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# Practice Test: Question Set - 46

1. A Newtonian liquid (ρ = density, μ = viscosity) is flowing with velocity ‘v’ in a tube of diameter 'D'. Let Δp be the pressure drop across the length 'L'. For a laminar flow, Δp is proportional to
(A) Lρv2/D
(B) LμV/D2
(C) Dρv2/L
(D) μV/L

2. Surge tanks are provided in high pressure water pipelines to
(A) Store a definite quantity of water all the time
(B) Reduce the water hammer
(C) Facilitate easy dismantling of pipeline for cleaning and maintenance
(D) None of these

3. In frictional fluid flow, the quantity, (P/ρ) + (V2/2gc) + gz/gc) is
(A) Constant along a streamline
(B) Not constant along a streamline
(C) Increased in the direction of flow
(D) None of these

4. Mercury is an ideal barometric fluid mainly due to its
(A) High density
(B) Low compressibility
(C) Low capillary action
(D) Very low vapor pressure

5. The fluid jet discharging from a 2" diameter orifice has a diameter of 1.75" at its vena-contracta. The co-efficient of contraction is
(A) 1.3
(B) 0.766
(C) 0.87
(D) None of these

6. The line of action of the buoyant force passes through the center of gravity of the
(A) Submerged body
(B) Displaced volume of the fluid
(C) Volume of fluid vertically above the body
(D) Horizontal projection of the body

7. For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to
(A) R
(B) R2
(C) R4
(D) R0.5

8. Which of the following is not dimension-less?
(A) Froude number
(B) Kinematic viscosity
(C) Pressure co-efficient
(D) None of these

9. With increase in the schedule number of a pipe of a particular nominal size, the
(A) Wall thickness also increases
(B) I.D. of the pipe decreases
(C) O.D. of the pipe remains constant
(D) All (a), (b) and (c)

10. Which of the following may be termed as a variable orifice flow-meter?
(A) Rotameter
(B) Pitot tube
(C) V-notch
(D) All (a), (b) and (c)

11. Specific speed for a centrifugal pump is
(A) NQ/H3/4
(B) NQ/H2/3
(C) N3D5/H1/3
(D) NQ/H

12. Open channel liquid flow is most conveniently measured by a
(A) Hot wire anemometer
(B) Notch
(C) Rotameter
(D) Segmental orifice

13. Rubber latex is an example of a __________ fluid.
(A) Pseudo plastic
(B) Bingham plastic
(C) Dilatent
(D) Newtonian

14. The Navier-Stokes equation deals with the law of conservation of
(A) Mass
(B) Energy
(C) Both (a) & (b)
(D) Momentum

15. The continuity equation
(A) Is independent of the compressibility of the fluid
(B) Is dependent upon the viscosity of the fluid
(C) Represents the conservation of mass
(D) None of these

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