### Hydraulics And Fluid Mechanics Set 23

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
• 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
• FALSE
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
• FALSE
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
• FALSE
Q21 | A flow through a long pipe at decreasing rate is called
Q22 | A venturiflume is a flumed structure constructed across a channel by restricting its width.
• TRUE
• FALSE
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
• FALSE
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