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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

- steady
- stream line
- turbulent
- unsteady

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
- adhesion
- 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