engineering economics.

1. PSV COLLEGE OF ENGINEERING AND TECHNOLOGY, KRISHNAGIRI
DEPARTMENT OF MECHANICAL ENGINEERING
ME6604 & GAS DYNAMICS AND JET PROPULSION
UNIT V ROCKET PROPULSION
PART –A
1. Distinguish between air breathing engine and rocket engine.
2. Give any two advantages and disadvantages of rockets compared to air breathing engine.
3. Why rocket engines are called as non-breathing engines?
4. How rockets are classified?
5. What is monopropellant? Give examples.
6. List out any two used of solid propellant rocket systems.
7. What are the types of liquid propellants? Give examples.
8. List the desirable properties of liquid propellants.
9. List the desirable properties of solid propellants.
10. What is the use of inhibitors in solid propellants?
11. What are cryogenic propellants?
12. What is characteristic velocity?
13. Compare the merits and demerits of bipropellants with monopropellants.
14. What is weight flow co-efficient?
15. Define escape velocity.
16. Name any two solid propellant fuels and oxidizers.
17. Write down the merits of hybrid propellant rockets.
18. Give two reasons for addition of additives with principal ingredients.
19. What is meant by thrust coefficient of a rocket engine?
20. How is solid propellant ignited?
21. What is the need of liquid propellant feeding system for rockets?
22. A space craft’s engine ejects mass at a rate of 30kg/s with an exhaust velocity of
3100m/s. The pressure at the nozzle exit is 5kPa and the exit area is 0.7m2
. What is the
thrust of a engine in a vacuum?
23. What is specific impulse of a rocket?
24. What is IWR?
PART –B
1. Deduce expressions for propulsive efficiency, specific impulse and overall efficiency of a
rocket engine.
2. (i) Explain the construction and operation of a solid propellant rocket engine. Also
Name any four solid propellants.
(ii) What are the advantages and disadvantages of liquid propellants compared to
solid propellants?
3. Explain with neat sketch the working of a turbo-pump feed system used in a liquid
propellant rocket.
4. Write short notes on:
i. Theory of rocket propulsion.
ii. Types of rocket engine.
5. Describe the important properties of liquid and solid propellants desired for rocket
propulsion.
6. (i) Derive the expressions for the characteristic velocity in terms of combustion
Chamber temperature.
(ii) Describe the working of a multi-stage rocket.
7. Describe with the aid of illustrative diagrams of any two arrangements of solid
propellant grains employed for restricted and unrestricted burning. Indicate the
directions of burning and flow of gases.