Streamline Flow

Q. 17.If y represents pressure & x represents velocity gradient dimensions of d2y/dx2 are??

Q.

Explain the property of fluid viscosity.

Q.

The spherical shape of rain-drop is due to

1. Density of the liquid

2. Surface tension

3. Atmospheric pressure

4. Gravity

Q. A water pump is used to deliver the water at constant rate. How should the power of pump be increased so that the rate at which water is delivered is increased x times

Q. A body of uniform cross section area floats in a liquid of density thrice its value .the portion of exposed height will be 1) 2/3 2) 5/6 3) 1/6 4) 9/10

Q. The phase of a particle in SHM at time t is pi/6. The following interference is drawn from this :- (1) The particle is at x = a/2 and moving in +X direction (2) The particle is at x = a/2 and moving in -X direction (3) The particle is at x = -a/2 and moving in +X direction (4) The particle is at x = -a/2 and moving in -X direction

Q. The velocity beyond which the flow of the liquid becomes turbulent is called velocity.

1. critical
2. terminal
3. instantaneous

Q. Which of the following is not the property of an ideal fluid?

1. Fluid flow is irrotational
2. Fluid flow is streamline
3. Fluid is incompressible
4. Fluid is viscous

Q.

A cylindrical tank stands on a frictionless surface. The seal over a circular hole of radius 0.5 cm in the wall of the tank ruptures when the level of water above the hole is 1 metre. The force that a person must apply on the cylinder to keep it from being set in motion is

1. 

2. 

3. 

4. 

Q. Six particles situated at the corners of a regular hexagonof side a move at a constant speed v. Each particlemaintains a direction towards the particle at the nextcorner. Calculate the time the particles will take to meeteach other.

Q. A pump is used to deliver water at a certain rate from a given pipe. To obtain water 2 times in the same time, the power of the pump has to be made : (a) 2 times (b) 4 times (c)8 times (d)16 times

Q. derive newtons 2nd law from 1st la

Q. Streamline flow is more likely for liquids with

1. high density and high viscosity
2. low density and low viscosity
3. high density and low viscosity
4. low density and high viscosity

Q. The velocity beyond which the flow of the liquid becomes turbulent is called velocity.

1. critical
2. terminal
3. instantaneous

Q. Position of a particle moving along x-axis at any time t is given by x=3t^2-12t+5. Then find the distance covered in 4s

Q. a farmer wants to double the water flowing out per unit time then power of pump required if initially be is using pump of power 2hp

Q. If dimensions of critical velocity (Vc) of liquid flowing through a tube is expressed as (Nx Py Rz) where N, P and R the coefficient of viscosity of liquid, density of liquid and radius of the tube respectively then the value of the x, y, z is given by

Q.

Whats the statement for Principle of Continuity??

Q. Steady flow is a streamlined flow.

1. False
2. True

Q.

In a Streamline flow

1. The speed of a particle always remains same

2. The kinetic energy of all the particles arriving at a given point are the same

3. The momenta of all the particles arriving at a given point are the same.

4. The velocity of a particle always remains same

Q. When air resistance is taken into account while dealing with the motion of the projectile which of the following properties shows an increase? a. range b. maximum height c. speed with which it strikes the ground d. the angle at which the projectile hits the ground

Q. Which of the following is not the property of an ideal fluid?

1. Fluid flow is irrotational
2. Fluid flow is streamline
3. Fluid is incompressible
4. Fluid is viscous

Q. A non viscous liquid is flowing through the pipe .cross sectional area ofA1 andA2 of liquid through A1 is 10 cm/s . Diffusion in hight between x and y is 15 cm density of liquid ρ =1000 kg/m∧3. work down by the pressure per unit volume will be