# Fluid Mechanics Notes

## Fluid Mechanics Lecture Notes

Hand-Written Notes

Important Topics

Note – More topics will be added soon, subscribe to avail offers and notifications.

Numerical Problems

We are working on this

Theory Problems

We are working on this

MCQs

1. Laminar developed flow at an average velocity of 5 m/s occurs in a pipe of 10 cm radius. The velocity at 5 cm radius is?

A. 6.5 m/s

B. 7 m/s

C. 7.5 m/s

D. 8m/s

Using the Formula

U = 2Uavg. [1 – (r/R)² ]

2. Flow separation is caused by –

C. reduction of pressure to local vapor pressure

D. thinning of boundary layer thickness to zero

3. A centrifugal pump is started with its delivery valve kept –

A. fully closed

B. fully open

C. partially open

D. 50% open

4. Ir-rotational flow occurs when?

A. there is no net rotation of the fluid element about its mass center

B. streamlines are curved

C. fluid element does not undergo any change in size or shape

D. flow takes place in a duct of a uniform cross section at a constant mass flow rate

5. Which of the following forces act on a fluid at rest?

1. Gravity force
2. Hydrostatic force
3. Surface tension
4. Viscous force

A. All of these

B. 1 and 2

C. 1, 2 and 4

D. 1, 2 and 3

Viscous force do not act when fluid is at rest.