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This mock test of Fluid Dynamics NAT Level - 2 for Physics helps you for every Physics entrance exam.
This contains 10 Multiple Choice Questions for Physics Fluid Dynamics NAT Level - 2 (mcq) to study with solutions a complete question bank.
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*Answer can only contain numeric values

QUESTION: 1

A cube with a mass ** m** = 20

[S.T of water = 70

Solution:

Downward force = Buoyant force

The correct answer is: 23

*Answer can only contain numeric values

QUESTION: 2

If the container filled with liquid gets accelerated horizontally or vertically, pressure in liquid gets changed. In case of horizontally accelerated liquid (** a_{x}**), the free surface has the slope In case of vertically accelerated liquid (

Solution:

...(effective ** g** will be

The correct answer is: 45

*Answer can only contain numeric values

QUESTION: 3

A Siphon tube is discharging a liquid of specific gravity 0.9 from a reservoir as shown in the figure. The pressure at the highest point ** B** is given by

Solution:

The correct answer is: 4.36

*Answer can only contain numeric values

QUESTION: 4

A cylindrical tank 1 * m* in radius rests on a platforms 5

Solution:

The correct answer is: 9200

*Answer can only contain numeric values

QUESTION: 5

The ** U**-tube acts as a water siphon. The bend in the tube in 1

Solution:

Applying Bernoulli equation between points (1) and (2)

Since, area of reservoir >> area of pipe.

The minimum pressure in the bend will be at ** A**. Therefore applying

Bernoulli’s equation between (1) and

again v_{1} ≈ 0 and from conservation of mass * V_{A}* =

on putting the value, we have

The correct answer is: 2.27

*Answer can only contain numeric values

QUESTION: 6

Water filled in an empty tank of area 10** A** through a tap of cross sectional area

Solution:

Volume of water filled in tank in * t* = 15

The correct answer is: 45

*Answer can only contain numeric values

QUESTION: 7

An open tank 10** m** long and 2

Solution:

The correct answer is: 20

*Answer can only contain numeric values

QUESTION: 8

When jet of liquid strikes a fixed or moving surfaces, it exerts thrust on it due to rate of change of momentum

If surface is free and starts moving due to thrust of liquid, then at any instant, the above equation gets modified based on relative change of momentum with respect to surface. Let any instant the velocity of surface is ** u**, then above equation becomes :

Based on above concept, in the below given figure, if the cart is frictionless and free to move in horizontal direction. Then velocity (in ** m/s**) of cart at

Solution:

Given cross-section area of jet = 2 × 10^{–4}*m*^{2} velocity of jet *V*_{0} = 10 ** m/sec**., density of liquid = 1000

Mass of cart =

**V**_{0} – * u* = 2

The correct answer is: 8

*Answer can only contain numeric values

QUESTION: 9

Length of horizontal arm of a uniform cross-section *U*-tube is ** l** = 21

Solution:

Due to rotation, Let the shift of liquid is* x cm*.

Let cross-section area of tube =

In the right limb for compressed air

Force at the corner ** C** of right limb climb due to liquid above.

Mass of the liquid in horizontal arm

It is rotated about left limb, then centripetal force

But **F**_{1} = **F**_{2}

On solving ** x **= 1

then length of air column = 6 – 1 = 5

The correct answer is: 5

*Answer can only contain numeric values

QUESTION: 10

The velocity of the liquid coming out of a small hole of a vessel containing two different liquids of densities 2ρ and ρ as shown in figure is given by (* ngh*)

Solution:

Pressure at (1) :

Applying Bernoulli’s theorem between points (1) and (2)

The correct answer is: 4

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