There will be (3) questions on the actual exam from Section B's (9) question pool. For each question below, click on the circle next to the correct answer. When you have finished the test, Click the 'Score My Exam' button at the bottom of the page. Good luck!!

Question B1
What does the “H“ in the motor designation H100-5 stand for?

A. It is the first letter in the manufacturer’s name
B. It indicates the total power range or impulse range of the rocket motor
C. It indicates the total thrust of the rocket motor
D. It indicates that the motor uses black powder as the propellant

Question B2
What does the “100“ in the motor designation H100-5 stand for?

A. It is the peak thrust in pounds of the rocket motor
B. It is the rocket motor burn time in seconds
C. It is the average thrust in Newtons of the rocket motor
D. It is the manufacturer’s retail price code

Question B3
What does the “5“ in the motor designation H100-5 stand for?

A. It is the rocket motor burn time
B. It is the peak thrust (in kilograms) of the rocket motor
C. It is the average thrust of the rocket motor
D. It is the ejection charge delay time

Question B4
What are the units of measurement for the “100“ in the motor designation H100-5?

A. Newtons per second
B. Newtons
C. Newton-seconds
D. Feet per second

Question B5
What is the maximum allowable impulse for a “J“ rocket motor?

A. 320.00 Newton-seconds
B. 640.00 Newton-seconds
C. 1280.00 Newton-seconds
D. 2560.00 Newton-seconds

Question B6
Assuming that each motor has the full allowable impulse, how many “H“ motors have the same total impulse as a single “J“ motor?

A. 3 motors
B. 1 motor
C. 2 motors
D. 4 motors

Question B7
You have an H64-8 rocket motor which has been certified to have a total impulse of 320.00 Newton-seconds. What is the approximate burn time for this motor?

A. 3 seconds
B. 5 seconds
C. 8 seconds
D. 10 seconds

Question B8
The manufacturer’s test data shows a total impulse of 690 Newton-seconds for your motor. What impulse class does your motor represent?

A. "H"
B. "I"
C. "J"
D. "K"

Question B9
The manufacturer’s test data shows an average thrust of 100 Newtons for 6 seconds for your motor. What impulse class does your motor represent?

A. "H"
B. "I"
C. "J"
D. "K"

Move to:

Section A

Section C

Section D

NOTE: If you have any questions or comments or would like to report any errors in the above material, please contact the NAR HPR Services Committee. Thank You!

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