Fluid Mechanics

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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?

The nature of flow of liquid through a pipe (D) Signup and view all the answers

What is an example of where eddies can be observed?

By the sides of a river bridge (A) Signup and view all the answers

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

The ratio of inertial force to viscous force per unit area (D) Signup and view all the answers

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

The flow changes from streamline to turbulent (C) Signup and view all the answers

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

NR < 2000 (C) Signup and view all the answers

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

It decreases the Reynolds number (D) Signup and view all the answers

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

Turbulent flow (A) Signup and view all the answers

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

The water level falls (D) Signup and view all the answers

What is a characteristic of streamline flow?

The velocity of the liquid particles is the same everywhere (A) Signup and view all the answers

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

The crowding of streamlines is directly proportional to the velocity of liquid particles (D) Signup and view all the answers

What is the characteristic of laminar flow?

The velocity of the liquid flow is always less than the critical velocity of the liquid (B) Signup and view all the answers

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

The liquid moves in the form of layers of different velocities that do not mix with each other (A) 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?

NR = v2ρ / ηr (D) Signup and view all the answers

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

NR < 2000 (A) Signup and view all the answers

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

It decreases (B) Signup and view all the answers

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

Laminar flow (D) Signup and view all the answers

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

NR ∝ v^2 (D) Signup and view all the answers

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

The volume of water displaced is directly proportional to the mass of the unloaded pieces. (A) Signup and view all the answers

What is the primary characteristic of laminar flow?

The flow of liquid occurs in the form of layers of different velocities. (C) Signup and view all the answers

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

It indicates the velocity of the liquid particles. (A) Signup and view all the answers

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

The water level in the pond falls. (C) Signup and view all the answers

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

The mixing of layers of different velocities. (B) Signup and view all the answers

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

Most of the energy is spent in producing eddies (A) Signup and view all the answers

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

The flow is streamlined and continuous (A) Signup and view all the answers

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

The Reynold's number determines the nature of flow of a liquid through a pipe (C) Signup and view all the answers

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

The flow becomes more turbulent and irregular (C) Signup and view all the answers

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

To create turbulence in the flow (C) Signup and view all the answers