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WorksheetsDay 29-Oct 17-Worksheet-Diploma-Types of flow & fluid lines
Total questions: 15
Worksheet time: 10mins
If velocity at a point in a 2-D flow is given by V = 3x²y î + 4xy² ĵ m/s, then the flow is —
Steady and uniform
Unsteady and compressible
Steady and non-uniform
Irrotational and uniform
For laminar flow through a pipe, the velocity distribution follows —
Linear law
Parabolic law
Logarithmic law
Hyperbolic law
In a steady incompressible flow, the rate of change of mass within a control volume is —
Zero
Constant
Equal to inflow rate
Depends on pressure
For compressible flow, fluid density __________ with pressure and temperature.
Remains same
Varies
The discharge through a 250 mm diameter pipe is 0.045 m³/s. Compute the mean velocity.
(a)
In a one-dimensional steady flow, velocity varies as V = 3x² m/s. Find the convective acceleration at x = 2 m.
(a)
In uniform flow, velocity does not vary with space but may vary with time.
True
False
For irrotational flow, the curl of the velocity vector is non-zero.
True
False
Assertion (A): Pathlines can intersect each other in unsteady flow. Reason (R): Different particles may pass through the same point at different instants of time.
Both (A) and (R) are true, and (R) correctly explains (A).
Both (A) and (R) are true, but (R) does not explain (A).
(A) is true, (R) is false.
(A) is false, (R) is true.
Both (A) and (R) are false.
The line whose tangent at any point represents the instantaneous velocity direction is called a (a) .
The continuity equation expresses the principle of (a)
The Reynolds number is the ratio of __________ forces to __________ forces.
(a)
In an incompressible steady flow through varying cross-section, velocity is (a) proportional to area.
Match the following
Streamline
Tangent gives instantaneous velocity
Pathline
Based on Lagrangian description
Streakline
Formed by particles passing a fixed poin
Two points A and B lie on the same streamline of a steady, incompressible flow.
Which statement about the flow is correct?
Fluid particles can cross the streamline connecting A and B
The mass flow rate between A and B is variable
Velocity component normal to the streamline is zero
Pressure at both points must be the same
