JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III ROCKET AND SPACECRAFT PROPULSION Previous Question Paper (May - 2019 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
What is the influence of air-fuel ratio on ignition temperature?
Answer
The air-fuel ratio significantly influences the ignition temperature by altering the mixture's chemical kinetics. Mixtures near the stoichiometric ratio generally exhibit the lowest ignition temperature, while excessively lean or rich mixtures require higher temperatures to initiate combustion due to insufficient fuel molecules or cooling effects, respectively.
What is the need of propellant tanks in rockets?
Answer
Propellant tanks are essential to store the fuel and oxidizer in a stable, pressurized state until they are required for combustion. They maintain the structural integrity of the rocket, ensure proper mass distribution, and provide the necessary feed pressure to the engine's injection system to maintain consistent thrust.
How the lift and drag forces develop on rockets?
Answer
Sign in to view the complete answer paper.
What is meant by rocket dispersion?
Answer
Sign in to view the complete answer paper.
What is the effect of gravitational forces on lift forces?
Answer
Sign in to view the complete answer paper.
Write two-dimensional rocket motion.
Answer
Sign in to view the complete answer paper.
What are the various separation technique?
Answer
Sign in to view the complete answer paper.
What are the advantages of multi-stage rockets?
Answer
Sign in to view the complete answer paper.
What is significance of strength to weight ratio in the selection of materials?
Answer
Sign in to view the complete answer paper.
What materials are selected to withstand high temperatures?
Answer
Sign in to view the complete answer paper.
PART - B
How the propellant tanks are arranged in the rockets and explain about multi-tank arrangement?
Answer
Sign in to view the complete answer paper.
How the tank pressurization is done to have efficient feeding of liquid fuel?
Answer
Sign in to view the complete answer paper.
What is Geysering effect in the missiles and how can it be eliminated?
Answer
Sign in to view the complete answer paper.
What are the various factors to be considered in the design of combustion chamber of rockets?
Answer
Sign in to view the complete answer paper.
How the long range navigation is developed in the rockets?
Answer
Sign in to view the complete answer paper.
What is the importance of centre of pressure and centre of gravity on the stability of rockets?
Answer
Sign in to view the complete answer paper.
What is the effect of lift and drag forces on the performance of missile?
Answer
Sign in to view the complete answer paper.
How the nose design is done for reducing drag forces coming on to the missile?
Answer
Sign in to view the complete answer paper.
How the drag free space flight operation can be obtained and explain the factors?
Answer
Sign in to view the complete answer paper.
What are the equations of motion in free space and gravitational field for a rocket?
Answer
Sign in to view the complete answer paper.
Describe the vertical velocity of rocket in the gravitational field.
Answer
Sign in to view the complete answer paper.
Derive the equations to find the altitude and range in the free space and mention the effect of gravity?
Answer
Sign in to view the complete answer paper.
How does the rocket path is controlled to avoid any derivation?
Answer
Sign in to view the complete answer paper.
Explain about secondary injection TVCS.
Answer
Sign in to view the complete answer paper.
What are the various means of thrust vectoring of rockets and explain about reactive fluid injection?
Answer
Sign in to view the complete answer paper.
What forces are developed about at the time of separation of stages and explain its working?
Answer
Sign in to view the complete answer paper.
What materials are used for high specific strength and high specific modulus?
Answer
Sign in to view the complete answer paper.
What are the adverse conditions developed during flight travel and explain the materials selected?
Answer
Sign in to view the complete answer paper.
What materials are selected for solid rocket motor case and high pressure gas bottles?
Answer
Sign in to view the complete answer paper.
What is the need of composite materials and explain their use in the rockets and missiles?
Answer
Sign in to view the complete answer paper.