### ME6604  GD&JP Important Questions

Anna University Regulation 2013 Mech ME6604  GD&JP Important Questions for all 5 units and MECH 6th SEM ME6604  GAS DYNAMICS AND JET PROPULSION  Answer Key is listed down for students to make perfect utilization and score maximum marks with our study materials.

ME6604  GD&JP Important Questions

UNIT -1 BASIC CONCEPT AND ISENTROPIC FLOWS

PART- A (2 Marks)

1. Distinguish between nozzle and diffuser.
2. When does maximum flow occur for a isentropic flow with variable are duct?
3. Differentiate between compressible and incompressible flow?
4. Name the four reference velocities that ate used in expressing the third velocities in nondimensional form.
5. „Zone of Silence‟ is absent in subsonic flow, Why?
6. What is the cross section of the nozzle required to increase the velocity of compressible fluid flow from (a) subsonic to supersonic, (b) subsonic to sonic.
7. What is subsonic, sonic and supersonic flow with respect to Mach number?
8. How the area and velocity vary in supersonic flow of nozzle and diffuser?
9. Define compressible flow and Mach number.
10. Predict stagnation state.
1. Express the stagnation enthalpy in terms of static enthalpy and velocity of flow.
2. List the condition for choking in CD nozzle.
3. Draw the disturbances wave propagation in compressible flow M = 1 and M>1.
4. When M* is used instead of M?
5. Rewrite the advantage of using M* (second kind of Mach number) instead of M (local Mach number) in some cases?
6. The wave front caused by firing a bullet gave a Mach angle of 35˚. Find the velocity of the bullet if the static temperature of atmosphere is 276K.
7. What is a Mach cone?
8. Define Mach number.
9. Describe compressible flow.
10. Discuss stagnation temperature and stagnation pressure.

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