L2 HPR Technical Quiz

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

#2. For an inherently stable rocket, which statement about the center of gravity (CG) and the center of pressure (CP) is true?

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

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

#5. For a cluster rocket, which construction technique will minimize the effect of one motor failing to ignite?

#6. 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?

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

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

#9. The average thrust of a rocket motor is 100 Newtons and the burn time is 4 seconds. What is the total impulse?

#10. What is NH 4 ClO 4 ?

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

#12. What happens to the coefficient of drag (C d ) as the rocket approaches the speed of sound?

#13. The definition of coefficient of drag (C d ) is:

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

#15. What are the three forces acting upon a rocket during flight?

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

#17. What is the purpose of a launch rod, rail or tower?

#18. When using an accelerometer-based altimeter in a rocket that may exceed Mach 1:

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

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

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

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

#23. The center of pressure (CP) of a rocket is generally defined as:

#24. What does the motor designation I220-8 mean?

#25. What is a cato?

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