Objective Type Questions on Fluid Mechanics - Set 19 - ObjectiveBooks
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# Practice Test: Question Set - 19

1. A large Reynold number is indication of
(A) Smooth and streamline flow
(B) Laminar flow
(D) Highly turbulent flow

2. Which of the following statement is wrong?
(A) A flow whose streamline is represented by a curve is called two dimensional flow.
(B) The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy.
(C) The length of divergent portion in a Venturimeter is equal to the convergent portion.
(D) A pitot tube is used to measure the velocity of flow at the required point in a pipe.

3. Density of water is maximum at
(A) 0° C
(B) 0° K
(C) 4° C
(D) 100° C

4. A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.
(A) Equal to
(B) Less than
(C) More than
(D) None of these

5. The bulk modulus of elasticity
(A) Has the dimensions of 1/pressure
(B) Increases with pressure
(C) Is large when fluid is more compressible
(D) Is independent of pressure and viscosity

6. A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be
(A) (2A√H₁)/(Cd × a√2g)
(B) (2AH₁)/(Cd × a√2g)
(C) (2AH₁3/2)/(Cd × a√2g)
(D) (2AH₁²)/(Cd × a√2g)

7. Kinematic viscosity is equal to
(A) Dynamic viscosity/density
(B) Dynamic viscosity × density
(C) Density/dynamic viscosity
(D) 1/dynamic viscosity × density

8. The atmospheric pressure at sea level is
(A) 103 kN/m2
(B) 10.3 m of water
(C) 760 mm of mercury
(D) All of these

9. The conditions for the stable equilibrium of a floating body are
(A) The metacentre should lie above the center of gravity
(B) The center of buoyancy and the center of gravity must lie on the same vertical line
(C) A righting couple should be formed
(D) All the above are correct

10. A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because
(A) It is easier to see through the glass tube
(B) Glass tube is cheaper than a metallic tube
(C) It is not possible to conduct this experiment with any other tube
(D) All of the above

11. To avoid an interruption in the flow of a siphon, an air vessel is provided
(A) At the inlet
(B) At the outlet
(C) At the summit
(D) At any point between inlet and outlet

12. When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
(A) 1.84(L - 0.1nH)H3/2
(B) 1.84(L - nH)H2
(C) 1.84(L - 0.1nH)H5/2
(D) 1.84(L - nH)H3

13. In an isothermal atmosphere, the pressure
(A) Decreases linearly with elevation
(B) Remain constant
(C) Varies in the same way as the density
(D) Increases exponentially with elevation

14. The pressure of a liquid measured with the help of a Piezometer tube is
(A) Vacuum pressure
(B) Gauge pressure
(C) Absolute pressure
(D) Atmospheric pressure

15. If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm", the pressure at a depth of 50 m below the oil surface will be
(A) 2 meters of water column
(B) 3 meters of water column
(C) 5 meters of water column
(D) 6 meters of water Column

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