Introduction to Fluid Dynamics MCQ

Test your knowledge with important Introduction to Fluid Dynamics MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Introduction to Fluid Dynamics MCQs on Bissoy. Bissoy App

• The best place to place a pitot tube on an aircraft for velocity measurement is just behind the jet engine.
  ক

  True

  খ

  False
• In the equation, the unit of E CANNOT be written as ______
  ক

  m2/s2

  খ

  J/kg

  গ

  Pa/m3

  ঘ

  kg.m/s2
• The below figure shows a pipe with a circular cross section of diameter 5 cm on the left end and a square cross section with diagonal 5 cm on the right end. Water enters the left end with a velocity 20 m/s and leaves the right end with a velocity V2. Find V2 (neglect losses in the pipe).
  ক

  V2 cannot be found as the length of the pipe is not given

  খ

  V2 cannot be found as the intermediate cross sections are not given.

  গ

  31.41 m/s

  ঘ

  20 m/s
• What does a pitot tube measure? Upon which principle does a pitot tube work?
  ক

  Pressure, Bernoulli’s principle

  খ

  Velocity, Bernoulli’s principle

  গ

  Pressure, Euler’s equation

  ঘ

  Velocity, Euler’s equation
• If compressibility force and surface tension force are neglected from the Newton’s second law of motion, which of the following equations result?
  ক

  Navier-Stokes equation

  খ

  Euler’s equation

  গ

  Bernoulli’s equation

  ঘ

  Reynolds equation
• A student wishes to find the velocity of air flowing through a pipe. He has a pressure gauge which displays only the dynamic pressure. The pressure gauge reads 0.018 mm Hg. Assume density of air to be 1.225 kg/m3, find the velocity V of air (ρHg = 13600 kg/m3).
  ক

  4 m/s

  খ

  2 m/s

  গ

  20 m/s

  ঘ

  40 m/s
• A water flows through a pipe at a velocity 2 m/s. The pressure gauge reading is 2 bar. The datum head is given to be 2 m. Find the piezometric head. (Assume all Bernoulli’s assumptions, Density of water = 1000 kg/m3, g = 9.8 m/s2).
  ক

  22.4 m

  খ

  22.6 m

  গ

  20.4 m

  ঘ

  20.6 m
• The Bernoulli’s equation in fluid dynamics is valid for _________
  ক

  Compressible flows

  খ

  Transient flows

  গ

  Continuous flows

  ঘ

  Viscous flows
• Which of the following equations is a result of momentum conservation for inviscid steady flows?
  ক

  Bernoulli’s equation

  খ

  Navier-Stokes equation

  গ

  First law of thermodynamics

  ঘ

  Euler’s equation
• Which of the following is NOT a type of force considered in the Navier-Stokes equation?
  ক

  Gravity force

  খ

  Pressure force

  গ

  Surface tension force

  ঘ

  Viscous force