B.TECH - Semester 8 propulsion engineering Question Paper 2019 (dec)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What are the fundamental laws of jet propulsion? Explain.
- Compare turbojet and turbofan engines.
- Define rain recovery ratio. Obtain an expression for the same.
- Explain any one method of thrust augmentation in turbojet engines.
- Write short notes on compressor-turbine matching.
- Draw energy flow diagram for a rocket engine. Explain the different efficiencies.
- Classify solid propellants. Quote examples.
- Describe the combustion instability in liquid propulsion engines.
- Make notes on multi staging or rockets.
- What do you mean by flight testing? Explain.
- Withneat sketches, explain the working of (a) Air screw
- Withneat sketches, explain the working of (b) Turboprop engine
- Withneat sketches, explain the working of (c) Scramjet engine
- Withneat sketches, explain the working of (d) Pulsejet engine
- (a) Derive an expression for propulsive efficiency of a turbojet engine. Obtain the condition for maximum efficiency.
- (b) An aircraft flies at $800 \mathrm{~km} / \mathrm{hr}$. One of its turbojet engines takes in $40 \mathrm{~kg} / \mathrm{s}$ of air and expands the gases to ambient pressure. The fuel air ratio is 0.02 and the calorific value of the fuel is $43 \ma...
- (a) Compare the different types of combustion chambers used in turbojet engines.
- (b) Give an account of air intake and exhaust methods in a turbojet engine. OR
- (a) Classify chemical rockets and point out their significance.
- (b) Illustrate the working of nuclear fission and nuclear fusion rockets.
- (a) What are the commonly used liquid propellants in chemical rockets?
- (b) Explain desirable properties of the fuels and oxidisers used in liquid engines.
- (a) Derive an expression for altitude gain during powered flight of a rocket or missile.
- (b) Calculate altitude gain during powered and coasting flights for a missile with maximum flight to jet speed ratio 0.21 , specific impulse 204 seconds and burn out time 8 seconds.