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This set of Hydraulics and Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Hydraulics And Fluid Mechanics Set 16

Q1 | Bernoulli's equation is applied to

- venturimeter
- orifice meter
- pitot tube
- all of these

Q2 | The flow in a pipe is laminar, when Reynold number is less than 2000.

- TRUE
- FALSE

Q3 | Select the wrong statement

- Weber's number is the ratio of inertia force to elastic force.
- Weber's number is the ratio of gravity force to surface tension force.
- Weber's number is the ratio of viscous force to pressure force.
- Weber's number is the ratio of inertia force to surface tension force.

Q4 | A vessel of 4 m3 contains an oil which weighs 30 kN. The specific weight of the oil is

- 4.5 kN / m3
- 6 kN / m3
- 7.5 kN / m3
- 10 kN / m3

Q5 | The quantity of a liquid flowing per second through a section of a pipe or a channel is called discharge and is measured in cumecs (m3/s).

- TRUE
- FALSE

Q6 | Water is

- a compressible
- an incompressible

Q7 | The specific weight of sea water is

- same as
- less than
- more than

Q8 | The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.

- Agree
- Disagree

Q9 | The specific weight of compressible fluids does not remain constant.

- TRUE
- FALSE

Q10 | An internal mouthpiece is said to be runing

- free
- partially
- full

Q11 | Turbulent flow takes place at high velocities.

- Agree
- Disagree

Q12 | The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

- surface tension
- compressibility
- capillarity
- viscosity

Q13 | The ratio of the inertia force to the surface tension force is called Weber's number.

- Correct
- Incorrect

Q14 | A venturiflume is used to measure

- pressure of liquid
- discharge of liquid
- pressure difference between two points in a channel
- pressure difference between two points in a pipe

Q15 | A fluid whose viscosity changes with the rate of deformation or shear strain is known as non-newtonian fluid.

- TRUE
- FALSE

Q16 | Falling drops of water become spheres due to the property of

- surface tension of water
- compressibility of water
- capillarity of water
- viscosity of water

Q17 | A flow in which the quantity of liquid flowing per second is not constant, is called

- streamline flow
- turbulent flow
- steady flow
- unsteady flow

Q18 | A flow whose streamline is represented by a straight line, is called

- one
- two
- three
- four

Q19 | The rise of liquid along the walls of a revolving cylinder about the initial level is

- same as
- less than
- more than

Q20 | A nirform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is

- 3.53 kN
- 33.5 kN
- 35.3 kN
- none of these

Q21 | A point, in a compressible flow where the velocity of fluid is zero, is called

- critical point
- vena contracta
- stagnation point
- none of these

Q22 | The coefficient of viscosity may be determined by

- capillary tube method
- orifice type viscometer
- rotating cylinder method
- all of these

Q23 | Coefficient of contraction is the ratio of

- actual velocity of jet at vena contracta to the theoretical velocity
- loss of head in the orifice to the head of water available at the exit of the orifice
- actual discharge through an orifice to the theoretical discharge
- area of jet at vena contracta to the area of orifice

Q24 | In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.

- Correct
- Incorrect

Q25 | When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.

- Agree
- Disagree