Hydraulics And Fluid Mechanics Set 19

Civil Engineering

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This set of Hydraulics and Fluid Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Hydraulics And Fluid Mechanics Set 19

Q1 | A structure whose width is
  • less than
  • more than
Answer: less than
Q2 | One poise is equal to
  • 0.1 N-s/m2
  • 1 N-s/m2
  • 10 N-s/m2
  • 100 N-s/m2
Answer: 0.1 N-s/m2
Q3 | According to equation of continuity,
  • w1a1 = w2a2
  • w1v1 = w2v2
  • a1v1 = a2v2
  • a1/v1 = a2/v2
Answer: a1v1 = a2v2
Q4 | An air vessel is provided at the summit in a syphon to
  • avoid interruption in the flow
  • increase discharge
  • increase velocity
  • maintain pressure difference
Answer: avoid interruption in the flow
Q5 | In a venturiflume, the flow takes place at
  • atmospheric pressure
  • gauge pressure
  • absolute pressure
  • none of these
Answer: atmospheric pressure
Q6 | The discharge over a triangular notch is
  • inversely proportional to H3/2
  • directly proportional to H3/2
  • inversely proportional to H5/2
  • directly proportional to H5/2
Answer: directly proportional to H5/2
Q7 | Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.
  • Yes
  • No
Answer: No
Q8 | The total energy of a liquid particle in motion is equal to
  • pressure energy + kinetic energy + potential energy
  • pressure energy - (kinetic energy + potential energy)
  • potential energy - (pressure energy + kinetic energy)
  • kinetic energy - (pressure energy + potential energy)
Answer: pressure energy + kinetic energy + potential energy
Q9 | The velocity of flow is same at all points in the cross-section of a channel.
  • TRUE
  • FALSE
Answer: FALSE
Q10 | A notch is used to measure
  • pressure
  • Disagree
  • velocity
  • volume
Answer: Disagree
Q11 | The most efficient section of a channel is
  • triangular
  • rectangular
  • square
  • trapezoidal
Answer: trapezoidal
Q12 | An orifice is said to be large, if
  • the size of orifice is large
  • the velocity of flow is large
  • the available head of liquid is more than 5 times the height of orifice
  • the available head of liquid is les than 5 times the height of orifice
Answer: the available head of liquid is les than 5 times the height of orifice
Q13 | A weir is said to be narrow-crested weir, if the width of the crest of the weir is
  • equal to
  • less than
  • more than
Answer: less than
Q14 | The rise, in water level, which occurs during the transformation of the unstable shooting flow to the stable streaming flow is called hydraulic jump.
  • Yes
  • No
Answer: Yes
Q15 | Water is a
  • real
  • ideal
  • newtonian
  • non-newtonian
Answer: newtonian
Q16 | A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
  • notch
  • weir
  • mouthpiece
  • nozzle
Answer: mouthpiece
Q17 | The body will sink down if the force of buoyancy is
  • equal to
  • less than
  • more than
Answer: less than
Q18 | In a short cylindrical external mouthpiece, the vena contracta occurs at a distance
  • equal to
  • one-fourth
  • one-third
  • one-half
Answer: one-fourth
Q19 | The viscosity of water at 20? C is
  • one stoke
  • one centistroke
  • one poise
  • one centipoise
Answer: one centipoise
Q20 | A thick liquid like a syrup has a
  • lesser
  • greater
Answer: greater
Q21 | Laminar flow
  • takes
  • does not take
Answer: takes
Q22 | The surface tension of mercury at normal temperature is
  • same as
  • lower than
  • higher than
Answer: higher than
Q23 | An error of 1% in measuring head over the apex of the notch (H) will produce an error of
  • 1%
  • 1.50%
  • 2%
  • 2.50%
Answer: 2.50%
Q24 | The pressure measured with the help of a piezometer tube is in
  • N / mm2
  • N / m2
  • head of liquid
  • all of these
Answer: head of liquid
Q25 | Bulk modulus of a fluid
  • remains same
  • decreases
  • increases
Answer: increases
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