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JEE Fluid Mechanics PYQs with Solutions

84 previous year questions from Fluid Mechanics (JEE Main & Advanced Physics) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

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About Fluid Mechanics PYQs

Fluid Mechanics has 84 previous year questions in the Quantrex Academy JEE Main & Advanced Physics bank. The 84 questions in this list come from Concepts Of Physics MCQ Edition [Volume 1] (84). Each question opens on its own page with the options, the correct answer and the worked solution where available.

Fluid Mechanics questions with solutions

1

As depicted in the figure, the heights of the mercury surfaces in the two arms of a manometer are 2 cm and 8 cm . The atmospheric pressure is given as 1.01 × 10^5 N m^ -2 .

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 2

The surface of water in a water tank located on the top of a house is 4 m above the tap level. Determine the pressure of water at the tap when the tap is closed. Is it necessary

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 3

A glass filled completely with water has a bottom area of 20 cm^2 , a top area of 20 cm^2 , a height of 20 cm , and a volume of half a litre. By considering the equilibrium of the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 4

As shown in the figure, the cross-sectional area of the wider tube is 900 cm^2 . If the boy standing on the piston weighs 45 kg , determine the difference in the water levels

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 5

A glass filled completely with water has a bottom area of 20 cm^2 , a top area of 20 cm^2 , a height of 20 cm , and a volume of half a litre. By considering the equilibrium of the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 6

A glass full of water has a bottom area of 20 cm^2 , a height of 20 cm , and a volume of 0.5 L . Assume the glass is enclosed by a jar and the air within the jar is entirely

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 7

In a manometer, the heights of the mercury surfaces in its two arms are 2 cm and 8 cm . The arm exposed to the atmosphere contains the 8 cm surface. The atmospheric pressure is

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 8

A glass full of water is enclosed by a jar, and the air within the jar is entirely evacuated. The force applied by the water on the bottom of the glass and the net vertical force

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 9

Suppose water is used to construct a barometer. What will be the height of the water column at standard atmospheric pressure ( 76 cm of mercury)?

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 10

Determine the force exerted by the water on a 2 m^2 plane surface of a large stone situated at the bottom of a sea 500 m deep. Does the force depend on the orientation of the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 11

A rectangular tank of dimensions 3 m × 2 m × 1 m is filled with water. Consider a vertical side of area 2 m × 1 m and a horizontal strip of width δ x metre within this side

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 12

An ornament weighs 36 g in air and 34 g in water. Assuming the ornament is prepared by mixing some copper with gold, determine the amount of copper present in it. The specific

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 13

An ornament weighs 36 g in air and 34 g in water. The goldsmith claims that no copper or other material has been mixed with the gold, but rather that some cavities might have been

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 14

As shown in the figure, a metal piece having a mass of 160 g rests in equilibrium within a glass of water. The piece makes contact with the bottom of the glass at only a few

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 15

A ferry boat has an internal volume of 1 m^3 and a weight of 50 kg . Neglecting the thickness of the wood, determine the fraction of the boat's volume that is immersed in water.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 16

A ferry boat has an internal volume of 1 m^3 and a weight of 50 kg . If a leak develops in the bottom and water begins coming in, what fraction of the boat's volume will be filled

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 17

A cubical block of ice floating in water must support a metal piece weighing 0.5 kg . Determine the minimum edge length of the block such that it does not sink in water. The

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 18

As shown in the figure, a cube of ice floats partly in water and partly in K.oil. Determine the ratio of the volume of ice immersed in water to that immersed in K.oil. The

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 19

A cubical box is to be built from iron sheets 1 mm thick. Determine the minimum value of the external edge so that the cube does not sink in water. The density of iron is 8000 kg

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 20

A cubical block of wood weighing 200 g has a lead piece fastened underneath. Determine the mass of the lead piece required to just allow the block to float in water. The specific

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 21

A lead piece is fastened to the top surface of a cubical block of wood weighing 200 g . Determine the mass of the lead piece if the block floats with its upper surface just

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 22

A cubical metal block with an edge of 12 cm floats in mercury such that one-fifth of its height is submerged. Water is then poured until the upper surface of the block is just

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 23

A hollow spherical body with inner and outer radii of 6 cm and 8 cm respectively floats half-submerged in water. Determine the density of the material of the sphere.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 24

A solid sphere with a radius of 5 cm floats in water. If a maximum load of 0.1 kg can be placed on it without getting the load wet, determine the specific gravity of the sphere's

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 25

Determine the ratio of the weights of a 1 kg block of iron and a 1 kg block of wood, as measured by a spring balance. The density of iron is 7800 kg m^ -3 , the density of wood is

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 26

A cylindrical object with an outer diameter of 20 cm and a mass of 2 kg floats in water, keeping its axis vertical. If it is slightly depressed and subsequently released

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 27

A vertical spring supports a cylindrical object with an outer diameter of 10 cm , a height of 20 cm , and a density of 8000 kg m^ -3 . The object rests half dipped in water in its

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 28

A cylindrical object of outer diameter 10 cm , height 20 cm , and density 8000 kg m^ -3 is held by a vertical spring of spring constant 500 N m^ -1 . The object is initially in

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 29

A wooden block of mass 0.5 kg and density 800 kg m^ -3 is attached to the free end of a vertical spring having a spring constant of 50 N m^ -1 , which is fixed at the bottom. The

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 30

A wooden block of mass 0.5 kg and density 800 kg m^ -3 is attached to the free end of a vertical spring having a spring constant of 50 N m^ -1 , which is fixed at the bottom. The

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 31

An ice cube with an edge of 4 cm is placed into an empty cylindrical glass having an inner diameter of 6 cm . The ice melts uniformly from each side, continuously maintaining its

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 32

A U-tube containing a liquid is subjected to a constant horizontal acceleration a_0 . Given that the separation between the vertical limbs is l , determine the difference in the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 33

At a certain confluence, river Yamuna mixes with the river Chambal and becomes river Kaveri. Suppose Yamuna has a width of 12 m , Chambal has a width of 8 m and Kaveri has a width

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 34

Water flows through a horizontal tube of variable cross section as shown in the figure. The cross-sectional areas at A and B are 4 mm^2 and 2 mm^2 respectively. If 1 cc of water

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 35

Water flows through a horizontal tube of variable cross section. The cross-sectional areas at A and B are 4 mm^2 and 2 mm^2 respectively. Given that 1 cc of water enters through A

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 36

Water flows through a horizontal tube of variable cross section. The cross-sectional areas at A and B are 4 mm^2 and 2 mm^2 respectively. If 1 cc of water enters through A per

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 37

Water flows through a vertical tube of variable cross section. The cross-sectional areas at A and B are 4 mm^2 and 2 mm^2 respectively. If 1 cc of water enters through A per

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 38

A tube with cross sections at A and B , having areas of 4 mm^2 and 2 mm^2 respectively, is kept vertical with B positioned upward. The distance separating A and B is (15)/(16) cm

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 39

A tube with cross sections at A and B , having areas of 4 mm^2 and 2 mm^2 respectively, is kept vertical with B positioned upward. The distance separating A and B is (15)/(16) cm

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 40

A tube with cross sections at A and B , having areas of 4 mm^2 and 2 mm^2 respectively, is kept vertical with B positioned upward. The distance separating A and B is (15)/(16) cm

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 41

Water travels through a tube as shown in the figure. The areas of cross section at A and B are 1 cm^2 and 0.5 cm^2 respectively. The height difference between A and B is 5 cm . If

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 42

Two speakers S_1 and S_2 , powered by a common amplifier, are situated at y = 1.0 m and y = -1.0 m as shown in the figure. These speakers vibrate in phase at 600 Hz . A man is

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 43

Water is flowing through a horizontal tube as depicted in the figure. Given that the difference in heights of the water columns in the vertical tubes is 2 cm , and the areas of

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 44

Water is flowing through the tube depicted in the figure. The cross-sectional areas of the wide and narrow portions of the tube are 5 cm^2 and 2 cm^2 , respectively. If the rate

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 45

Water leaks from an open tank via a hole of area 2 mm^2 at the bottom. Assume the tank is filled with water to a height of 80 cm and has a cross-sectional area of 0.4 m^2 . The

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 46

A water level is maintained up to a fixed height H in a cylindrical vessel. The vessel rests on a horizontal plane. At what height above the bottom should a hole be made in the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 47

A liquid can readily change its shape while a solid cannot, because

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 48

Given the equations P = _ Δ S → 0 (F)/(Δ S) and P_1 - P_2 = ρ g z , which of the following statements applies to an elevator that is accelerating upward?

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 49

Three vessels, as shown in the figure, possess identical base areas. Equal volumes of a liquid are poured into the three vessels. The force acting on the base will be

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 50

A siphon is depicted in the figure. The liquid present in the setup is water. Determine the pressure difference P_B - P_A between points A and B .

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 51

A beaker containing a liquid is placed inside a large closed jar. If the air within the jar is continuously pumped out, the pressure in the liquid near the bottom will

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 52

The pressure in a liquid is equal at two points in the same horizontal plane. Consider an elevator accelerating upward and a car accelerating on a horizontal road. This statement

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 53

Three identical cylindrical vessels A, B, and C contain equal masses of three liquids. The densities of the liquids satisfy ρ_A < ρ_B < ρ_C . The force exerted on the base will be

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 54

A barometer placed inside an upward accelerating elevator reads 76 cm . The air pressure within the elevator is

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 55

To assemble a barometer, a tube of length 1 m is completely filled with mercury and inverted in a mercury cup. On a certain day, the barometer reading is 76 cm . Suppose a 1 m

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 56

A piece of wood is floating in water kept inside a bottle. The bottle is connected to an air pump. Neglecting the compressibility of water, when additional air is pushed into the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 57

Water is kept in a beaker, and a wooden object floats in it. The object is located near one side of the beaker, as shown in the figure. Let P_1 , P_2 , and P_3 denote the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 58

Water flows into end A of a cylindrical tube AB at a speed v_1 and exits from end B at a speed v_2 . The tube remains entirely full of water at all times. Consider three cases: in

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 59

Water flows through a long horizontal tube. Suppose P_A and P_B represent the pressures at two distinct points A and B within the tube.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 60

Bernoulli's theorem is based upon the conservation of

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 61

Water and mercury fill two cylindrical vessels to an identical height. Each vessel features a hole in the wall near its bottom. The velocities of the water and mercury emerging

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 62

A large cylindrical tank contains a hole of area A at its bottom. Water is poured into the tank via a tube of the same cross-sectional area A , which ejects water at a speed v .

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 63

Let P_1 denote the pressure at the surface of the mercury inside a barometer tube, while P_2 represents the pressure at the mercury surface in the cup.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 64

Suspended from a spring balance is a 20 N metal block. A beaker containing some water is placed on a weighing machine, which initially reads 40 N . The spring balance is

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 65

When at rest, a barometer kept inside an elevator shows a reading of 76 cm . If the elevator ascends with increasing speed, the reading will become

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 66

A metal cube is placed inside an empty vessel. When water is added to the vessel such that the cube is completely immersed, the force on the bottom of the vessel in contact with

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 67

A closed cubical box is entirely filled with water and undergoes a horizontal acceleration a towards the right. The resultant normal force exerted by the water on the top of the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 68

A closed cubical box is completely filled with water and is accelerated horizontally towards right with an acceleration a . Let the water push the left wall by a force F_1 and the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 69

A solid is fully immersed in a liquid. The force exerted by the liquid on the solid will

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 70

A closed vessel is half-filled with water. Air is pumped out through a hole located near the top of the vessel.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 71

For a streamline flow,

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 72

A solid is floating in a liquid in a partially dipped state.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 73

Water flows through two identical tubes A and B . In a specified time interval, a volume V_0 of water passes through tube A while 2V_0 passes through tube B . Which of the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 74

A spring balance measures the weight of an empty balloon to be W_1 . After filling the balloon with air, its weight becomes W_2 . Let w denote the weight of the air itself.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 75

Water flows in streamline motion through a tube having a horizontal axis. Consider two points, A and B , inside the tube at an identical horizontal level.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 76

An open tank filled with a liquid has a small hole near its bottom. The speed of the ejected liquid does not depend on the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 77

An open tank filled with a liquid has a small hole near its bottom. The speed of the ejected liquid does not depend on the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 78

Water flows in streamline motion through a tube having a horizontal axis. Consider two points, A and B , inside the tube at an identical horizontal level.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 79

A solid is fully immersed in a liquid. The force exerted by the liquid on the solid will

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 80

A closed vessel is half-filled with water. Air is pumped out through a hole located near the top of the vessel.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 81

A spring balance measures the weight of an empty balloon to be W_1 . After filling the balloon with air, its weight becomes W_2 . Let w denote the weight of the air itself.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 82

A solid is floating in a liquid in a partially dipped state.

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 83

Water flows through two identical tubes A and B . In a specified time interval, a volume V_0 of water passes through tube A while 2V_0 passes through tube B . Which of the

Concepts Of Physics MCQ Edition [Volume 1] Solution View → 84

For a streamline flow,

Concepts Of Physics MCQ Edition [Volume 1] Solution View →
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