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This set of Hydraulics and Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Hydraulics And Fluid Mechanics Set 22
Q1 | The pressure of a liquid measured with the help of a piezometer tube is
- vacuum pressure
- gauge pressure
- absolute pressure
- atmospheric pressure
Q2 | The pressure of liquid at throat in a venturimeter is
- higher
- lower
Q3 | The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
- Yes
- No
Q4 | In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be
- double
- four times
- eight times
- sixteen times
Q5 | A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.
- Yes
- No
Q6 | An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be
- equal to
- directly proportional
- inversely proportional
Q7 | When the pipes are in series, the total head loss is equal to the sum of the head loss in each pipe.
- Yes
- No
Q8 | The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called
- density of liquid
- specific gravity of liquid
- compressibility of liquid
- surface tension of liquid
Q9 | In an external mouthpiece, the absolute pressure head at vena contracta is
- less than
- more than
Q10 | The unit of kinematic viscosity in S. I. units is
- N-m/s
- N-s/m2
- m2/s
- N - m
Q11 | Re-entrant or Borda's mouthpiece is an
- internal
- external
Q12 | The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is
- one-half
- one-third
- two-third
Q13 | The coefficient of venturiflume, generally lies between
- 0.3 to 0.45
- 0.50 to 0.75
- 0.75 to 0.95
- 0.95 to 1.0
Q14 | An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called.
- weir
- notch
- orifice
- none of these
Q15 | In a venturimeter, the velocity of liquid at throat is
- higher
- lower
Q16 | When a body is placed over a liquid, it will float if
- gravitational force is equal to the upthrust of the liquid
- gravitational force is less than the upthrust of the liquid
- gravitational force is more than the upthrust of the liquid
- none of the above
Q17 | The hydraulic gradient line may be above or below the centre line of the pipe.
- TRUE
- FALSE
Q18 | The property of a liquid which enables into resist tensile stress is called its surface tension.
- Agree
- Disagree
Q19 | In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.
- TRUE
- FALSE
Q20 | The viscosity of a liquid
- effects
- does not effect
Q21 | A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
- 2.89 kM
- 8.29 kN
- 9.28 kN
- 28.9 kN
Q22 | A flow is called sonic, if the Mach number is unity.
- Agree
- Disagree
Q23 | An internal mouthpiece is said to be running free if the length of the mouthpiece is
- less than twice
- more than twice
- less than three times
- more than three times
Q24 | The hydraulic mean depth or the hydraulic radius is the ratio of
- area of flow and wetted perimeter
- wetted perimeter and diameter of pipe
- velocity of flow and area of flow
- none of these
Q25 | When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure
- less than
- more than