L2 HPR Technical Quiz

The quiz includes a random selection of 25 questions. Answer each of the questions and then click on the FINISH button at the bottom of the quiz.

Your quiz will then be automatically marked. Pass mark is 90%.

Correct answers will be highlighted in green and incorrect answers will be highlighted in pink.

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#1. A rocket with a motor cluster consisting of a central composite motor and four black powder motors, using five identical igniters:

#2. You are at the launch site and decide to fly your rocket on a heavier motor than you simulated it on. Which statement regarding CG is true?

#3. Rocket A weighs twice as much as rocket B. Both are descending at 20 feet per second. Which statement is true?

#4. How do you convert Newtons of thrust to pounds of thrust?

#5. What can happen if all the motors of a cluster do not ignite at launch?

#6. Which describes the thrust curve of a progressive motor?

#7. In general terms, the specific impulse of a rocket motor is:

#8. What is a Newton?

#9. Which of the following is most likely in dual-deployment rockets that use a drogue and a main parachute?

#10. What is the oxidizer most commonly used in a commercial hybrid rocket motor?

#11. How does Newton’s Third Law “To every action there is always an equal and opposite reaction” relate to rocketry?

#12. What is NH4ClO4?

#13. For a rocket with a much less than 10:1 “length to diameter” (L/D) ratio, such as spools and pyramids, what type of drag contributes significantly to stability and makes it possible to fly without much, if any, nose weight?

#14. The flight of a high-power rocket can be separated into three portions; they are:

#15. Which of the motors listed below has the highest total impulse?

#16. How can a statically unstable rocket be made stable?

#17. What are the three major factors that determine the maximum altitude of a high-power rocket in vertical flight?

#18. Which describes the thrust curve of a regressive motor burn?

#19. What is a shred?

#20. When using a pressure-sensor altimeter in a rocket that will not reach Mach 1:

#21. What is the difference between a J640 and a J320 high power rocket motor (assume full 1280 Newton-second J motors)?

#22. Which of the motors listed below has the highest average thrust?

#23. What typically happens to a marginally stable rocket with a hybrid motor during the thrusting phase?

#24. What is the primary requirement for a rocket motor ignitor?

#25. Which of Newton’s Laws best describes the behavior of a rocket motor?