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.

To switch to the Safety questions click here.

Results

Congratulations!

You have passed the test.

Unlucky.

You have not passed the test this time.

Keep practising.

#1. What is the major issue with accelerometer-based altimeters?

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

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

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

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

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

#7. What are three methods used to shift the center of pressure (CP) aft?

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

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

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

#11. Which of the following has a total impulse (I t ) in the J motor range?

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

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

#14. 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?

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

#16. What is the purpose of a launch lug or rail buttons?

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

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

#19. 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?

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

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

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

#23. What are three methods used to shift the center of gravity (CG) of a rocket forward?

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

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

Finish