Hydraulics problems
- 1. The dimensionless parameter not applicable to flowing liquids, is
Options- A. Reynold number
- B. Weber number
- C. Pressure coefficient
- D. Kinematic viscosity
- E. Friction factor. Discuss
Correct Answer: Kinematic viscosity
- 2. A floating body attains stable equilibrium if its metacentre is
Options- A. at the centroid
- B. above the centroid
- C. below the centroid
- D. anywhere. Discuss
Correct Answer: above the centroid
- 3. For critical flow, the Froude number is :
Options- A. 1.0
- B. less than 1.0
- C. more than 1.0
- D. 2 Discuss
Correct Answer: 1.0
- 4. The velocity of flow at the critical depth (hc) is called critical velocity (Vc) which is equal to
Options- A. Vc = g x hc
- B. g x hc
- C.
- D. None of these. Discuss
Correct Answer: g x hc
- 5. 'Flow net' can be drawn only if the flow is
Options- A. turbulent
- B. rotational
- C. distortion
- D. none of these. Discuss
Correct Answer: distortion
- 6. Pick up the correct statement from the following :
Options- A. Discharge over a triangular notch is proportional to H5/2
- B. Discharge over a rectangular notch is proportional to H3/2
- C. Both (a) and (b)
- D. Neither (a) nor (b). Discuss
Correct Answer: Both (a) and (b)
- 7. In C.G.S. system the unit of visocity is
Options- A. dyne
- B. joule
- C. poise
- D. Newton
- E. none of these. Discuss
Correct Answer: poise
- 8. Though angle of deviation of liquid is more in internal mouth piece, the contraction of the jet, is
Options- A. more in the internal mouth piece
- B. less in the internal mouth piece
- C. equal to external mouth piece
- D. none of these. Discuss
Correct Answer: more in the internal mouth piece
- 9. When a liquid rotates at constant angular velocity about a vertical axis of a rigid body, the pressure
Options- A. increases linearly to its radial distance
- B. varies inversely as the altitude along any vertical line
- C. varies as the square of the radial distance
- D. decreases as the square of the radial distance
- E. none of these. Discuss
Correct Answer: varies as the square of the radial distance
- 10. The intensity of pressure due to sudden closure of a valve of a pipe in which water flows with velocity v, is directly proportional to :
Options- A. square root of the bulk modulus of elasticity of water
- B. bulk modulus of elasticity of water
- C. specific weight of water
- D. none of these. Discuss
Correct Answer: square root of the bulk modulus of elasticity of water
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