Test: Fluid Flow Kinematics - 3


10 Questions MCQ Test Topicwise Question Bank for Civil Engineering | Test: Fluid Flow Kinematics - 3


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QUESTION: 1

Consider the following parameters related to fluid flow:
1. Vorticity
2. Velocity potential
3. Stream function
Among these, those which exist both in rotational flows and irrotational flows would include 

Solution:
QUESTION: 2

The Toricelli theorem gives velocity of jet as

Solution:
QUESTION: 3

The basic principles of fluid flow are
1. conservation of mass
2. conservation of energy
3. conservation of momentum
Which of these statements are correct?

Solution:
QUESTION: 4

The mean velocities at two ends of a stream tube 10 cm apart are 2.5 m/s and 3 m/s. The convectional tangential acceleration mid-way is

Solution:

Convectional tangential acceleration is given by

= 13.75 m/sec2

QUESTION: 5

The flow of water in a wash hand basin when it is being emptied through a central opening, is an example of

Solution:

Free vortex flow is irrotational flow and total head (energy) remains constant throughout flow field.

QUESTION: 6

Given the x - component of the velocity u = 6xy - 2x2, the y-component of the flow velocity is given by:

Solution:

The flow must satisfy continuity equation, 

QUESTION: 7

Which one of the following represents two dimensional rotational flow?

Solution:

For rotational flow,

So


 

QUESTION: 8

If flow velocity in x and y directions are given by u = 2x + 3y and v = - 2y. The circulation around the circle of radius 2 unit will be

Solution:

u = 2x + 3y
v = - 2y

vorticity = 2 x rotational velocity 
= - 3
circulation = vorticity x area 

QUESTION: 9

Match List-I (stream line pattern) with List-II (type of acceleration) and select the correct answer using the code given below the lists:

Codes:

Solution:
QUESTION: 10

A stream function is given by, ψ = 2x2y + (x + 1 )y2. The flow rate across a line joining points A(3, 0) and B(0, 2) is 

Solution:


∴ Q = |0 - 4I = 4 units.

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