Rocket Propulsion MCQs

1. What is the principle of operation for a rocket engine?
(A) Electric propulsion
(B) Chemical reaction
(C) Nuclear fission
(D) Magnetic levitation

2. Which of the following is the primary propellant used in liquid rocket engines?
(A) Gunpowder
(B) Kerosene
(C) Solid fuel
(D) Liquid hydrogen

3. In rocket propulsion, what does ISP stand for?
(A) Interstellar Propulsion
(B) Ionization Speed Parameter
(C) Internal Specific Performance
(D) Specific Impulse

4. What type of rocket engine uses the combustion of a solid propellant?
(A) Liquid-propellant rocket engine
(B) Hybrid rocket engine
(C) Solid-propellant rocket engine
(D) Ion thruster

5. Which of these is an example of a liquid rocket propellant combination?
(A) RP-1 and liquid oxygen
(B) Ammonium perchlorate and binder
(C) Aluminum powder and ammonium nitrate
(D) Nitrous oxide and rubber

6. What is the function of a nozzle in a rocket engine?
(A) To ignite the propellant
(B) To control the flow rate of propellant
(C) To direct and accelerate exhaust gases
(D) To stabilize the rocket during flight

7. Which rocket propulsion concept involves using energy from nuclear reactions?
(A) Ion propulsion
(B) Electric propulsion
(C) Nuclear thermal propulsion
(D) Solid propulsion

8. What is the specific impulse of a rocket engine that provides 3000 Ns/kg of thrust with 150 kg/s of propellant flow rate?
(A) 20 s
(B) 200 s
(C) 300 s
(D) 2000 s

9. Which of the following is a disadvantage of solid rocket propulsion?
(A) High specific impulse
(B) Difficult to control thrust
(C) Low energy density
(D) Complex storage requirements

10. What is the primary advantage of a hybrid rocket engine compared to other types?
(A) Higher specific impulse
(B) Simplicity and safety
(C) Faster acceleration
(D) Lower operational cost

11. Which parameter characterizes the efficiency of a rocket engine?
(A) Thrust
(B) Impulse
(C) Efficiency
(D) Specific impulse

12. What is the primary advantage of using liquid propellants in rocket engines?
(A) Simplicity of storage
(B) Higher energy density
(C) Lower cost
(D) Ease of ignition

13. Which type of rocket propulsion system combines features of both liquid and solid rocket engines?
(A) Hybrid
(B) Nuclear thermal
(C) Ion
(D) Electric

14. In a rocket engine, what role does the oxidizer play?
(A) Provides thrust
(B) Initiates combustion
(C) Supports combustion
(D) Controls engine temperature

15. Which rocket engine type is commonly used in satellite propulsion due to its high efficiency over long durations?
(A) Solid-propellant
(B) Hybrid
(C) Ion
(D) Nuclear thermal

16. What is the purpose of a regenerative cooling system in a rocket engine?
(A) To enhance thrust
(B) To control combustion rate
(C) To prevent overheating of engine components
(D) To increase specific impulse

17. Which of these propellants is commonly used in solid rocket engines?
(A) Liquid oxygen
(B) Hydrogen peroxide
(C) Ammonium perchlorate
(D) Nitrous oxide

18. What is the primary advantage of using gaseous propellants in rocket engines?
(A) Higher energy density
(B) Easier handling and storage
(C) Lower combustion temperatures
(D) Reduced exhaust velocity

19. Which rocket engine type is often used in interplanetary missions due to its high efficiency in vacuum conditions?
(A) Liquid-propellant
(B) Hybrid
(C) Ion
(D) Solid-propellant

20. What is the primary challenge associated with nuclear thermal propulsion systems?
(A) High operational cost
(B) Radioactive fuel handling
(C) Low specific impulse
(D) Limited thrust capability