### Hydraulics And Fluid Mechanics Set 16

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
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