Discussion
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- Question
The mass per unit volume of a liquid at a standard temperature and pressure is called
Options- A. specific weight
- B. mass density
- C. specific gravity
- D. none of these
- Correct Answer
- mass density
- 1. A body floating in a liquid is said to be in neutral equilibrium, if its metacentre
Options- A. coincides with its centre of gravity
- B. lies above its centre of gravity
- C. lies below its centre of gravity
- D. lies between the centre of buoyancy and centre of gravity Discuss
- 2. The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)
Options- A. wH/2
- B. wH
- C. wH2/2
- D. wH2/4 Discuss
- 3. The highest efficiency is obtained with a channel of __________ section.
Options- A. circular
- B. square
- C. rectangular
- D. trapezoidal Discuss
- 4. The centre of pressure acts __________ the centre of gravity of immersed surface.
Options- A. at
- B. above
- C. below Discuss
- 5. One cubic metre of water weighs
Options- A. 100 litres
- B. 250 litres
- C. 500 litres
- D. 1000 litres Discuss
- 6. In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
Options- A. running full
- B. running free
- C. partially running full
- D. partially running free Discuss
- 7. The shear stress between the two liquid layers is __________ proportional to the distance between two layers.
Options- A. directly
- B. indirectly Discuss
- 8. According to Kelvin-Planck's statement of second law of thermodynamics,
Options- A. it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
- B. it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
- C. it is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
- D. none of the above Discuss
- 9. The area under the temperature-entropy curve (T - s curve) of any thermodynamic process represents
Options- A. heat absorbed
- B. heat rejected
- C. either (a) or (b)
- D. none of these Discuss
- 10. For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
Options- A. p v = constant, if T is kept constant
- B. v/T = constant, if p is kept constant
- C. p/T = constant, if v is kept constant
- D. T/p = constant, if v is kept constant Discuss
Hydraulics and Fluid Mechanics problems
Search Results
Correct Answer: coincides with its centre of gravity
Correct Answer: wH2/2
Correct Answer: trapezoidal
Correct Answer: below
Correct Answer: 1000 litres
Correct Answer: running free
Correct Answer: indirectly
Correct Answer: it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
Correct Answer: either (a) or (b)
Correct Answer: p v = constant, if T is kept constant
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