| If the velocity, pressure, density, etc., change at a point with respect to time, the flow is called |
A) uniform
B) compressible
C) unsteady
D) incompressible
| A path line is a concept given by |
A) Lagrangian
B) Euler
C) Colebrook
D) Bernoulli
| The existence of the velocity potential indicates that |
A) the flow is irrotational
B) the flow is rotation
C) vorticity is zero
D) steady
| Streamlines and Equipotential lines are lines that |
A) Can be drawn graphically for viscous flow around any boundary
B) Form meshes of perfect squares
C) Are orthogonal wherever they meet
D) Can be determined mathematically for all boundary conditions
| The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as _____ |
A) Path line
B) Stream line
C) Steak line
D) Potential line
| Consider the following parameters related to fluid flow: (i) Vorticity (ii) Velocity potential (iii) Stream Function Which of these parameters exit both in rotational and irrotational flows |
A) i and ii
B) ii and iii
C) i and iii
D) i, ii and iii
| Stream lines and path lines always coincide (identical) in case of |
A) steady flow
B) laminar flow
C) uniform flow
D) turbulent flow
| In steady flow |
A) Velocity is constant along the flow direction with distance at any time
B) Velocity increases at constant rate at a point with time
C) Velocity is constant at a point with time
D) Rate of change of velocity remain constant along flow direction at any time
| The Euler’s equation for the motion of fluids is based on the assumption that (i) The fluid is non-viscous, homogenous, and incompressible. (ii) The velocity of flow is uniform over the section. (iii) The flow is continuous, steady and along the stream line |
A) Only (i)
B) (i) and (ii)
C) (ii) and (iii)
D) (i), (ii) and (iii)
| A velocity potential exists |
A) Whenever the real fluid flow exists
B) When the flow is real and rotational
C) When the flow satisfies the conditions of irrotational motion
D) When the flow satisfies the equation of continuity
