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.

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Results

#1. Which of the following has a total impulse (It) in the J motor range?

#2. Rocket A is descending at 10 feet per second, rocket B weighs the same but is descending at 20 feet per second. Which statement is true?

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

#4. A Bates grain has an essentially neutral thrust curve because:

#5. The definition of coefficient of drag (Cd) is:

#6. What is the most common function of a motor liner and the O-ring seals in a solid rocket motor?

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

#8. When doing an air-start of an L class motor, which of the following would be considered the safest configuration?

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

#10. What is a Newton?

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

#12. What is NH4ClO4?

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

#14. For a subsonic rocket, what factors most greatly affect the coefficient of drag (C d)?

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

#16. What is a shred?

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

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

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

#20. A 4" diameter rocket with its motor is determined to have the center of gravity (CG) four inches behind the center of pressure (CP). Is this a rocket likely to be stable?

#21. What is the most common oxidizer in commercially available high power composite solid rocket motors?

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

#23. 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?

#24. What ordinarily happens to the center of gravity (CG) of a rocket during a solid rocket motor’s thrusting phase?

#25. What is a Newton?

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