# What are the viva questions for fluid mechanics lab?

My answer to What are the viva questions for fluid mechanics lab?

Flow measurement devices.

1. What is meant by calibration?
2. What is meant by coefficient of discharge?
3. What is the use of Venturimeter?
4. What is the use of measuring tank?
5. What is discharge? What is its unit?
6. What is mass flow rate? Mention its unit?
7. What is volume flow rate? write its unit.
8. Why do we use logarithmic graphs?
9. State the equation for theoretical discharge.
10. How will you find out actual discharge?
11. Describe the principle of manometers and its uses.
1. What is meant by Head?
2. What is the density of water?
3. What is density of mercury?
4. Calculate head of 10.3 meters of water in terms of head of mercury.
5. Where is the application of Notches?
6. What is use of plotting different graphs in this experiment?
7. Is the Coefficient of discharge a constant for all notches?
8. What are the aims of this experiment?
9. What do you understand from the graphs that we have plotted?
10. Give the equation for theoretical discharge.
11. Metacentric height
12. Explain the physical significance of Radius of gyration
13. What is meant by  metacentric height?
14. What is the effect of center of  gravity on the stability of the floating body?
15. What is the effect of mass of the floating body on the mean time of oscillation?
1. Write Bernoulli’s equation.
2. Classify turbo machines.
3. Classify turbines based on the working, based on head and based on flow.
4. What are the uses of characteristic curves?
5. Explain the working of Pelton wheel.
6. Explain the working of Kaplan turbine?
7. Why reaction turbines are called so?
8. Why Pelton wheel is called an impulse turbine?
9. What is specific speed?
10. Define a) Volumetric efficiency b) Mechanical efficiency c) Overall  efficiency.
11. Give expression for water Power.
12. Give expression for shaft power.
13. Differentiate between power and work.
14. What is Venturimeter constant?
15. Discuss about different losses in turbines.

Pumps

1. Classification of pumps
2. Define slip.
3. What is the function of air vessel?
4. What is meant by positive displacement pump? Give examples
5. Discuss different losses in pumps
6. Working principle of centrifugal pump
7. Working principle of reciprocating pump.
8. What is the use of characteristic curves of pump?
9. What is meant by operating point?
10. Describe the effect of discharge on efficiency of the pump.

20 TOP MOST FLUID MECHANICS VIVA Questions and Answers Mechanical VIVA Questions