Hydraulics And Fluid Mechanics Set 16

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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
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
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
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
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