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This set of Hydraulics and Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Hydraulics And Fluid Mechanics Set 14
Q1 | The Bernoulli's equation is based on the assumption that
- There is no loss of energy of the liquid flowing
- The velocity of flow is uniform across any cross-section of the pipe
- No force except gravity acts on the fluid
- All of the above
Q2 | The flow in a pipe is turbulent when Reynold number is
- Less than 2000
- Between 2000 and 2800
- More than 2800
- None of these
Q3 | When the flow parameters at any given instant remain same at every point, then flow is said to be
- Quasi-static
- Steady state
- Laminar
- Uniform
Q4 | Rain drops are spherical because of
- Viscosity
- Air resistance
- Surface tension forces
- Atmospheric pressure
Q5 | The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.
- Plus
- Minus
- Divide
- None of these
Q6 | The sheet of water flowing over a notch or a weir is known as
- Sill or crest
- Nappe or vein
- Orifice
- None of these
Q7 | A structure used to dam up a stream or river over which the water flows is called
- Orifice
- Notch
- Weir
- Dam
Q8 | A body floating in a liquid is said to be in neutral equilibrium, if its metacentre
- Coincides with its centre of gravity
- Lies above its centre of gravity
- Lies below its centre of gravity
- Lies between the centre of buoyancy and centre of gravity
Q9 | General energy equation holds for
- Steady flow
- Turbulent flow
- Laminar flow
- Non-uniform flow
Q10 | The buoyancy depends on
- Mass of liquid displaced
- Viscosity of the liquid
- Pressure of the liquid displaced
- Depth of immersion
Q11 | The centre of gravity of the volume of the liquid displaced is called
- Centre of pressure
- Centre of buoyancy
- Metacentre
- None of these
Q12 | The Reynold's number of a ship is __________ to its velocity and length.
- Directly proportional
- Inversely proportional
- Square root of velocity
- None of these
Q13 | In the above question, if the angular velocity ? is doubled, then the depth of parabola will be
- halved
- two times
- four times
- eight times
Q14 | The total pressure on the top of a closed cylindrical vessel competely filled up with a liquid is
- directly proportional to (radius)2
- inversely proportional to (radius)2
- directly proportional to (radius)4
- inversely proportional to (radius)4
Q15 | The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch
- plus
- minus
Q16 | The coefficient of discharge for an external mouthpiece is
- 0.375
- 0.5
- 0.707
- 0.855
Q17 | A fluid having no viscosity is known as
- real fluid
- ideal fluid
- newtonian fluid
- non-newtonian fluid
Q18 | A wwir is said to be broad crested weir. If the width of the crest of the weir is
- equal to
- less than
- more than
Q19 | The velocity through a channel of circular section will be maximum when the depth of water is
- 0.34 times
- 0.67 times
- 0.81 times
- 0.95 times
Q20 | The pressure of the liquid flowing through the divergent portion of a venturimeter
- remains constant
- increases
- decreases
- depends upon mass of liquid
Q21 | An error of 1% in measureing head over the crest of the notch (H) will produce an error of
- 1%
- 1.50%
- 2%
- 2.50%
Q22 | In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is
- equal to
- one-third
- two-third
- three-fourth
Q23 | To force present in a moving liquid is
- inertia force
- viscous force
- gravity force
- all of these
Q24 | If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.
- TRUE
- FALSE
Q25 | Which of the following is an example of maninar flow?
- Under ground flow
- Flow past tiny bodies
- Flow of oil in measuring insturments
- all of these