Hydraulics and Fluid Mechanics Theory Test - Set 33 - ObjectiveBooks

Hydraulics and Fluid Mechanics Theory Test - Set 33

Practice Test: Question Set - 33

1. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
    (A) Gauge pressure
    (B) Absolute pressure
    (C) Positive gauge pressure
    (D) Vacuum pressure

2. If the coefficient of discharge is 0.6, then the discharge over a right angled notch is
    (A) 0.417 H5/2
    (B) 1.417 H5/2
    (C) 4.171 H5/2
    (D) 7.141 H5/2

3. The most efficient section of a channel is
    (A) Triangular
    (B) Rectangular
    (C) Square
    (D) Trapezoidal

4. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
    (A) Notch
    (B) Weir
    (C) Mouthpiece
    (D) Nozzle

5. An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.
    (A) Equal to
    (B) Directly proportional
    (C) Inversely proportional
    (D) None of these

6. The coefficient of discharge for an external mouthpiece is
    (A) 0.375
    (B) 0.5
    (C) 0.707
    (D) 0.855

7. The process of diffusion of one liquid into the other through a semi permeable membrane is called
    (A) Viscosity
    (B) Osmosis
    (C) Surface tension
    (D) Cohesion

8. One stoke is equal to
    (A) 10-2 m2/s
    (B) 10-3 m2/s
    (C) 10-4 m2/s
    (D) 10-6 m2/s

9. Falling drops of water become spheres due to the property of
    (A) Surface tension of water
    (B) Compressibility of water
    (C) Capillarity of water
    (D) Viscosity of water

10. The specific gravity of an oil whose specific weight is 7.85 kN/m3, is
    (A) 0.8
    (B) 1
    (C) 1.2
    (D) 1.6

11. The length of the divergent cone in a Venturimeter is __________ that of the convergent cone.
    (A) Equal to
    (B) Double
    (C) Three to four times
    (D) Five to six times

12. If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in
    (A) Neutral equilibrium
    (B) Stable equilibrium
    (C) Unstable equilibrium
    (D) None of these

13. The stress-strain relation of the Newtonian fluid is
    (A) Linear
    (B) Parabolic
    (C) Hyperbolic
    (D) Inverse type

14. The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
    (A) Effects
    (B) Does not effect
    (C) Both A and B
    (D) None of these

15. The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.
    (A) Less than
    (B) More than
    (C) Equal to
    (D) None of these

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