Fluid Mechanics
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What occurs to the motion of liquid particles when its velocity exceeds the critical velocity?

  • The motion becomes laminar
  • The motion becomes streamlined
  • The motion becomes disordered or irregular (correct)
  • The motion becomes circular

    • What is the primary purpose of the energy spent in turbulent flow?

  • To produce eddies in the liquid (correct)
  • To create laminar flow
  • To maintain forward flow
  • To increase the critical velocity

    • What is the significance of the critical velocity?

  • It's the minimum velocity for laminar flow
  • It's the maximum velocity for turbulent flow
  • It's the velocity above which flow becomes turbulent (correct)
  • It's the velocity below which flow becomes streamlined

    • What is Reynold's number used to determine?

    <p>The nature of flow of liquid through a pipe</p> Signup and view all the answers

    What is an example of where eddies can be observed?

    <p>By the sides of a river bridge</p> Signup and view all the answers

    What does the Reynolds number indicate in the flow of a liquid?

    <p>The ratio of inertial force to viscous force per unit area</p> Signup and view all the answers

    What happens to the flow of liquid when the Reynolds number is between 2000 and 3000?

    <p>The flow changes from streamline to turbulent</p> Signup and view all the answers

    What is the condition for streamline flow according to the Reynolds number?

    <p>NR &lt; 2000</p> Signup and view all the answers

    What is the effect of increasing the radius of the pipe on the Reynolds number?

    <p>It decreases the Reynolds number</p> Signup and view all the answers

    What type of flow occurs when the Reynolds number is above 3000?

    <p>Turbulent flow</p> Signup and view all the answers

    What happens to the water level in the pond if the pieces are unloaded on the ground?

    <p>The water level falls</p> Signup and view all the answers

    What is a characteristic of streamline flow?

    <p>The velocity of the liquid particles is the same everywhere</p> Signup and view all the answers

    What is the relationship between the crowding of streamlines and the velocity of liquid particles?

    <p>The crowding of streamlines is directly proportional to the velocity of liquid particles</p> Signup and view all the answers

    What is the characteristic of laminar flow?

    <p>The velocity of the liquid flow is always less than the critical velocity of the liquid</p> Signup and view all the answers

    What is true about the flow of liquid in laminar flow?

    <p>The liquid moves in the form of layers of different velocities that do not mix with each other</p> Signup and view all the answers

    What is the ratio of the inertial force per unit area to the viscous force per unit area in a liquid flowing through a tube?

    <p>NR = v2ρ / ηr</p> Signup and view all the answers

    What is the condition for the flow of liquid in a pipe to be most streamlined?

    <p>NR &lt; 2000</p> Signup and view all the answers

    What happens to the Reynolds number when the radius of the pipe is increased?

    <p>It decreases</p> Signup and view all the answers

    What is the characteristic of the flow of liquid when the Reynolds number is between 0 to 2000?

    <p>Laminar flow</p> Signup and view all the answers

    What is the relationship between the velocity of liquid particles and the Reynolds number?

    <p>NR ∝ v^2</p> Signup and view all the answers

    What is the relationship between the mass of the unloaded pieces and the volume of water displaced?

    <p>The volume of water displaced is directly proportional to the mass of the unloaded pieces.</p> Signup and view all the answers

    What is the primary characteristic of laminar flow?

    <p>The flow of liquid occurs in the form of layers of different velocities.</p> Signup and view all the answers

    What is the significance of the crowding of streamlines in streamline flow?

    <p>It indicates the velocity of the liquid particles.</p> Signup and view all the answers

    What is the effect of unloading the pieces on the ground on the water level in the pond?

    <p>The water level in the pond falls.</p> Signup and view all the answers

    What is the primary difference between laminar flow and turbulent flow?

    <p>The mixing of layers of different velocities.</p> Signup and view all the answers

    What is the primary reason for the decrease in the forward flow of a liquid in turbulent flow?

    <p>Most of the energy is spent in producing eddies</p> Signup and view all the answers

    Which of the following is a characteristic of a liquid flow below its critical velocity?

    <p>The flow is streamlined and continuous</p> Signup and view all the answers

    What is the relationship between the Reynold's number and the flow of a liquid?

    <p>The Reynold's number determines the nature of flow of a liquid through a pipe</p> Signup and view all the answers

    What is the effect of increasing the velocity of a liquid above its critical velocity?

    <p>The flow becomes more turbulent and irregular</p> Signup and view all the answers

    What is the primary function of the energy spent in producing eddies in turbulent flow?

    <p>To create turbulence in the flow</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser