Hydraulics and Fluid Mechanics problems
- 1. The sheet of water flowing over a notch or a weir is known as
Options- A. sill or crest
- B. nappe or vein
- C. orifice
- D. none of these Discuss
Correct Answer: nappe or vein
- 2. The most efficient section of a channel is
Options- A. triangular
- B. rectangular
- C. square
- D. trapezoidal Discuss
Correct Answer: trapezoidal
- 3. When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as
Options- A. centre of pressure
- B. centre of gravity
- C. centre of buoyancy
- D. metacentre Discuss
Correct Answer: metacentre
- 4. A flow in which the quantity of liquid flowing per second is not constant, is called
Options- A. streamline flow
- B. turbulent flow
- C. steady flow
- D. unsteady flow Discuss
Correct Answer: unsteady flow
- 5. The force per unit length is the unit of
Options- A. surface tension
- B. compressibility
- C. capillarity
- D. viscosity Discuss
Correct Answer: surface tension
- 6. In the manufacturing of lead shots, the property of surface tension is utilised.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 7. In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere.
Options- A. True
- B. False Discuss
Correct Answer: True
- 8. In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.
Options- A. equal to
- B. one-third
- C. two-third
- D. three-fourth Discuss
Correct Answer: two-third
- 9. When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure
Options- A. varies as the square of the radial distance
- B. increases linearly as its radial distance
- C. increases as the square of the radial distance
- D. decreases as the square of the radial distance Discuss
Correct Answer: varies as the square of the radial distance
- 10. The force present in a moving liquid is
Options- A. inertia force
- B. viscous force
- C. gravity force
- D. all of these Discuss
Correct Answer: all of these
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