Mechanical Engineering Hydraulics Practice Exams - Set 32 - ObjectiveBooks

# Practice Test: Question Set - 32

1. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)
(A) K
(B) K
(C) ρ/K
(D) None of these

2. A fluid having no viscosity is known as
(A) Real fluid
(B) Ideal fluid
(C) Newtonian fluid
(D) Non-Newtonian fluid

3. In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be
(A) 1/16 to 1/8
(B) 1/8 to 1/4
(C) 1/4 to 1/3
(D) 1/3 to 1/2

4. Liquids transmit pressure equally in all the directions. This is according to
(A) Boyle's law
(B) Archimedes principle
(C) Pascal's law
(D) Newton's formula

5. The discharge over a triangular notch is
(A) Inversely proportional to H3/2
(B) Directly proportional to H3/2
(C) Inversely proportional to H5/2
(D) Directly proportional to H5/2

6. A flow whose streamline is represented by a straight line, is called __________ dimensional flow.
(A) One
(B) Two
(C) Three
(D) Four

7. The body will float if the force of buoyancy is __________ the weight of the liquid displaced.
(A) Equal to
(B) Less than
(C) More than
(D) None of these

8. The velocity corresponding to Reynold number of 2000 is called
(A) Sub-sonic velocity
(B) Super-sonic velocity
(C) Lower critical velocity
(D) Higher critical velocity

9. A structure, whose width is __________ the width of the channel, is called a flumed structure.
(A) Less than
(B) More than
(C) Equal
(D) None of these

10. The force of buoyancy is always __________ the weight of the liquid displaced by the body.
(A) Equal to
(B) Less than
(C) More than
(D) None of these

11. The density of water is 1000 kg/m3 at
(A) 0° C
(B) 0° K
(C) 4° C
(D) 20° C

12. Bulk modulus of a fluid __________ as the pressure increases.
(A) Remain same
(B) Decreases
(C) Increases
(D) None of these

13. The coefficient of viscosity may be determined by
(A) Capillary tube method
(B) Orifice type viscometer
(C) Rotating cylinder method
(D) All of these

14. Center of pressure on an inclined plane is
(A) At the Centroid
(B) Above the Centroid
(C) Below the Centroid
(D) At metacentre

15. When the Mach number is less than unity, the flow is called
(A) Sub-sonic flow
(B) Sonic flow
(C) Super-sonic flow
(D) Hyper-sonic flow

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