Hydraulics And Fluid Mechanics Set 23

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This set of Hydraulics and Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Hydraulics And Fluid Mechanics Set 23

Q1 | According to Pascal's law, the intensity of pressure at any point in a fluid at rest is the same in all directions.
  • Agree
  • Disagree
Q2 | When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as
  • narrow-creasted weir
  • broad-crested weir
  • Ogee weir
  • submerged weir
Q3 | A manometer is used to measure
  • low pressure
  • moderate pressure
  • high pressure
  • atomospheric pressure
Q4 | Stoke is the unit of
  • kinematic viscosity in C.G.S. units
  • kinematic viscosity in M.K.S. units
  • dynamic viscosity in M.K.S. units
  • dynamic viscosity in S.I. units
Q5 | Coefficient of resistance is the ratio of
  • actual velocity of jet at vena contracta to the theoretical velocity
  • area of jet at vena contracta to the area of orifice
  • 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
Q6 | The discharge in an open channel corresponding to critical depth is
  • zero
  • minimum
  • maximum
Q7 | The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced.
  • TRUE
Q8 | Bulk modulus of a fluid is the ratio of
  • shear stress to shear strain
  • increase in volume to the viscosity of fluid
  • increase in pressure to the volumetric strain
  • critical veloity to the viscosity of fluid
Q9 | The tangential velocity of the water element having a free vortex is
  • directly proportional to its distance from the centre
  • inversely proportional to its distance from the centre
  • directly proportional to its (distance)2 from the centre
  • inversely proportional to its (distance)2 from the centre
Q10 | When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of
  • a triangle
  • a paraboloid
  • an ellipse
  • none of these
Q11 | The vlow in a pipe is neither laminar nor turbulent when Reynold number is
  • less than 2000
  • between 2000 and 2800
  • more than 2800
  • none of these
Q12 | When the Mach number is more than 6, the flow is called
  • sub-sonic flow
  • sonic flow
  • super-sonic flow
  • hyper-sonic flow
Q13 | A flow in which
  • elastic
  • surface tension
  • viscous
  • inertia
Q14 | The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
  • The bodies A and B have equal stability
  • The body A is more stable than body B
  • The body B is more stable than body A
  • The bodies A and B are unstable
Q15 | When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid.
  • TRUE
Q16 | The discharge of a depressed nappe is 6 to 7 percent
  • less than
  • more than
Q17 | The ratio of the inertia force to the gravity force is called Froud's number.
  • Agree
  • Disagree
Q18 | When the corfficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
  • 1.84 (L-0.1 nH) H3/2
  • 1.84 (L-nH) H2
  • 1.84 (L-0.1 nH) H5/2
  • 1.84 (L-nH) H3
Q19 | The specific weight of water in S.I. units is taken as
  • 9.81 kN/m3
  • 9.81 x 103 N/m3
  • 9.81 x 10-6 N/mm3
  • any of these
Q20 | The vacuum pressure can be measured with the help of a piezometer tube.
  • TRUE
Q21 | A flow through a long pipe at decreasing rate is called
  • steady
  • unsteady
Q22 | A venturiflume is a flumed structure constructed across a channel by restricting its width.
  • TRUE
Q23 | The specific gravity of an oil whose specific weight is 7.85 kN / m3, is
  • 0.8
  • 1
  • 1.2
  • 1.6
Q24 | When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water.
  • TRUE
Q25 | In case of flow through parallel pipes,
  • the head loss for all the pipes is same
  • the total discharge is equal to the sum of discharges in the various pipes
  • the total head loss is the sum of head losses in the various pipes
  • all of the above