Fluid Mechanics PYQs - Last 5 Years

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Practice 178 MHT CET Physics questions from Fluid Mechanics. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 5 Years Fluid Mechanics Questions

Showing 28 of 178 filtered questions.

1Fluid Mechanics

Two spherical soap bubbles of radii '\(a\)' and '\(b\)' in vacuum coalesce under isothermal conditions. The resulting bubble has a radius equal to

2Fluid Mechanics

The fundamental frequency of a sonometer wir carrying a block of mass '\(M\)' and density '\(\rho\)' is '\(n\)' Hz. When the block is completely immerse in a liquid of density '\(\sigma\)' then the new frequency will be

3Fluid Mechanics

Venturimeter is used to

4Fluid Mechanics

Twenty seven droplets of water each of radius \(0.1 \mathrm{~mm}\) merge to form a single drop then the energy released is

5Fluid Mechanics

A large number of water droplets each of radius '\(t\)' combine to form a large drop of Radius '\(R\)'. If the surface tension of water is '\(T\)' & mechanical equivalent of heat is '\(\mathrm{J}\)' then the rise in temperature due to this ...

6Fluid Mechanics

If work done in blowing a soap bubble of volume \(V\) is \(W\), then the work done in blowing the bubble of volume \(2 \mathrm{~V}\) from same soap solution is

7Fluid Mechanics

There is hole of area \(A\) at the bottom of a cylindrical vessel. Water is filled to a height \(h\) and water flows out in \(t\) second. If water is filled to a height \(4 h\), it will flow out in time (in second)

8Fluid Mechanics

The excess pressure inside a first spherical drop of water is three times that of second spherical drop of water. Then the ratio of mass of first spherical drop to that of second spherical drop is

9Fluid Mechanics

A spherical drop of liquid splits into 1000 identical spherical drops. If '\(\mathrm{E}_1\)' is the surface energy of the original drop and '\(\mathrm{E}_2\)' is the total surface energy of the resulting drops, then $$\frac{E_1}{E_2}=\frac{...

10Fluid Mechanics

Consider a soap film on a rectangular frame of wire of area \(3 \times 3 \mathrm{~cm}^2\). If the area of the soap film is increased to \(5 \times 5 \mathrm{~cm}^2\), the work done in the process will be (surface tension of soap solution is...

11Fluid Mechanics

Select the WRONG statement from the following. In a streamline flow

12Fluid Mechanics

A spherical metal ball of radius '\(r\)' falls through viscous liquid with velocity '\(\mathrm{V}\)'. Another metal ball of same material but of radius \(\left(\frac{r}{3}\right)\) falls through same liquid, then its terminal velocity will ...

13Fluid Mechanics

Eight small drops of mercury each of radius '\(r\)', coalesce to form a large single drop. The ratio of total surface energy before and after the change is

14Fluid Mechanics

A body of density '\(\rho\)' is dropped from rest at a height '\(h\)' into a lake of density '\(\sigma' (\sigma>\rho)\). The maximum depth to which the body sinks before returning to float on the surface is (neglect air dissipative forces)

15Fluid Mechanics

A spherical liquid drop of radius \(\mathrm{R}\) is divided into 8 equal droplets. If surface tension is \(\mathrm{S}\), then the work done in this process will be

16Fluid Mechanics

Two capillary tubes of the same diameter are kept vertically in two different liquids whose densities are in the ratio \(4: 3\). The rise of liquid in two capillaries is '\(h_1\)' and '\(h_2\)' respectively. If the surface tensions of liqui...

17Fluid Mechanics

What should be the diameter of a soap bubble, in order that the excess pressure inside it is \(25.6 \mathrm{~Nm}^{-2}\) ? [surface tension of soap solution \(\left.=3 \cdot 2 \times 10^{-2} \mathrm{~Nm}^{-2}\right]\)

18Fluid Mechanics

A fluid of density '\(\rho\)' is flowing through a uniform tube of diameter '\(d\)'. The coefficient of viscosity of the fluid is '\(\eta\)', then critical velocity of the fluid is

19Fluid Mechanics

A liquid drop of radius '\(R\)' is broken into '\(n\)' identical small droplets. The work done is [T = surface tension of the liquid]

20Fluid Mechanics

The height of liquid column raised in a capillary tube of certain radius when dipped in liquid '\(A\)' vertically is \(5 \mathrm{~cm}\). If the tube is dipped in a similar manner in another liquid '\(B\)' of surface tension and density doub...

21Fluid Mechanics

Three liquids have same surface tension and densities \(\rho_1, \rho_2\), and \(\rho_3\left(\rho_1>\rho_2>\rho_3\right)\). In three identical capillaries rise of liquid is same. The corresponding angles of contact \(\theta_1, \theta_2\) and...

22Fluid Mechanics

Water flows through a horizontal pipe at a speed '\(\mathrm{V}\)'. Internal diameter of the pipe is '\(\mathrm{d}\)'. If the water is coming out at a speed '\(V_1\)' then the diameter of the nozzle is

23Fluid Mechanics

A metal sphere of mass '\(m\)' and density '\(\sigma_1\)' falls with terminal velocity through a container containing liquid. The density of liquid is '\(\sigma_2\)'. The viscous force acting on the sphere is

24Fluid Mechanics

At critical temperature, the surface tension of liquid is

25Fluid Mechanics

'\(n\)' number of liquid drops each of radius '\(r\)' coalesce to form a single drop of radius '\(R\)'. The energy released in the process is converted into the kinetic energy of the big drop so formed. The speed of the big drop is
$$[\math...

26Fluid Mechanics

A steel coin of thickness '\(\mathrm{d}\)' and density '\(\rho\)' is floating on water of surface tension '\(T\)'. The radius of the coin \((R)\) is [\(\mathrm{g}=\) acceleration due to gravity]

27Fluid Mechanics

The work done in blowing a soap bubble of radius \(\mathrm{R}\) is '\(\mathrm{W}_1\)' at room temperature. Now the soap solution is heated. From the heated solution another soap bubble of radius \(2 \mathrm{R}\) is blown and the work done i...

28Fluid Mechanics

The excess pressure inside a soap bubble of radius \(2 \mathrm{~cm}\) is 50 dyne/cm\(^2\). The surface tension is