Question

1. Circle the correct statements:
   1. In steady flow, all properties of the flow remain constant with respect to time.
   2. Turbulent flow motion is irregular and predictable.
   3. Lagrangian flow description uses field representation of the flow.
   4. Streamlines are a series of curves drawn tangent to the velocity vectors.
   5. Equation of continuity describes the conservation of energy.
   6. In a control volume, the volume is conserved.
   7. Bernoulli equation describes the conservation of energy in a real fluid flow.
   8. Energy line shows the distribution of piezometric head.
   9. Hydraulic grade line shows the distribution of total head.
   10. Stagnation point is where the velocity becomes zero.

Answer 1

a. Correct statement;

Given statement is definition of steady flow.

b. Incorrect statement because turbulent flow is irregular and unpredictable.

C.correct statement

d. Correct statement ;

A strem lines is an imaginary curves drawn through a flowing field in such way so that the tangent to it at any point gives the direction of the instantaneous velocity of flow at that point.

e. Incorrect statement ;

Continuity equation is based on principle of conservation of mass.

f. Correct statement

g. Incorrect statement ;

Bernouli equation describes the conservation of the energy in a ideal fluid flow.

h. Incorrect statement ;

Energy line shows distribution of total head.

I. Incorrect statement ;

Hydraulic grade line shows distribution of piezometric head.

j. Correct statement;

In a fluid flow system, where the velocity of flow becomes equal to zero, is known as stagnation point.

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