### Hydraulics And Fluid Mechanics Set 21

This set of Hydraulics and Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Hydraulics And Fluid Mechanics Set 21

Q1 | Barometer is used to measure
• velocity of liquid
• atmospheric pressure
• pressure in pipes and channels
• difference of pressure between two points in a pipe
Q2 | An ideal fluid is frictionless and incompressible.
• Correct
• Incorrect
Q3 | The vacuum pressure is always the negattive gauge pressure.
• Yes
• No
Q4 | The Cippoletti weir is a
• rectangular
• triangular
• trapezoidal
• circular
Q5 | The density of a liquid in kg / m3 is numerically equal to its specific gravity.
• TRUE
• FALSE
Q6 | The specific gravity of water is taken as
• 0.001
• 0.01
• 0.1
• 1
Q7 | The frictional resistance of a pipe varies approximately with
• pressure
• velocity
• square of velocity
• cube of velocity
Q8 | The intensity of pressure at any point, in a liquid, is
• equal
• directly proportional
• inversely proportional
Q9 | A fluid which obeys the Newton's law of viscosity is termed as
• real fluid
• ideal fluid
• newtonian fluid
• non-newtonian fluid
Q10 | A flow in which the quantity of liquid flowing per second is constant, is called
• stream line
• turbulent
Q11 | The atmospheric pressure at sea level is
• 103 kN / m3
• 10.3 m of water
• 760 mm of mercury
• all of the above
Q12 | Viscous force is the
• sum
• different
• product
• ratio
Q13 | For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called
• continuity equation
• Bernoulli's equation
• Pascal's law
• Archimede's principle
Q14 | The pressure of fluid due to hammer blow is
• directly proportional to density of fluid
• inversely proportional to density of fluid
• directly proportional to (density)1/2 of fluid
• inversely proportional to (density)1/2 of fluid
Q15 | Surface tension force is the product of surface tension per unit length and cross-sectional area of flow.
• Correct
• Incorrect
Q16 | The mercuty does not wet the glass. This is due to the property of the liquid known as
• cohesion
• viscosity
• surface tension
Q17 | In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as the of the atmosphere.
• TRUE
• FALSE
Q18 | The value of coefficient of velocity for a sharp edged orifice
• decrease
• increases
Q19 | The specific weight is also known as weight density.
• Correct
• Incorrect
Q20 | In a footstep bearing, if the speed of the shaft is doubled, then the torque required to over-come the viscous resistance will be
• double
• four times
• eight times
• sixteen times
Q21 | To product of mass and accelaration of flowing liquid is called
• inertia force
• viscous force
• gravity force
• pressure force
Q22 | The maximum efficiency of transmission through a pipe is
• 50%
• 56.70%
• 66.67%
• 76.66%
Q23 | Euler's number is the ratio of
• inertia
• gravity
• viscous
Q24 | To to of the weir over which the water flows in known as
• sill or crest
• nappe or vein
• oriffice
• none of these
Q25 | A weir is usually made of masonry or concrete.
• Yes
• No