NAR HPR Level 2 Certification Practice Exam

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 A2
What part of the Federal Aviation Regulations govern rocket activity?
A. Part 125
B. Part 101
C. Part 95
D. Part 97

 

Question A7
What is the maximum allowable weight for a High Power Rocket permitted per NFPA 1127?
A. 3069 pounds
B. 400 pounds
C. There is no limit provided the rocket weighs less than 1/3 of the average certified thrust of the motors intended to be ignited at launch
D. 100 pounds

 

Question A9
Which of the following characteristics does NOT meet the definition of a High Power Rocket Motor?
A. Propellant weight greater than 125 grams
B. Total impulse is more than 160 Newton-seconds
C. The motor uses a "composite" propellant
D. Average thrust greater than 80 Newtons

 

Question A11
A launch site is defined as containing areas for which of the following activities?
A. Launching
B. Recovery
C. Parking
D. All of the above

 

Question A14
You're attending a launch that has a thin (but see-through) cloud layer at ~3,000 feet and clear blue skies above it. Is it okay to "punch" through this cloud layer with a High Power Rocket if there's a Certificate of Waiver or Authorization (COA) granting Class 2 flights up to 6,000 feet?
A. Yes, since there is an active COA, High Power Rockets can be flown up to the 6,000 foot altitude limit
B. No, flights into any clouds are prohibited unless specifically waived by the FAA
C. Yes, as long as the cloud layer can barely be seen through and the RSO allows it
D. Both "A" and "C" above

 

Question A15
You are attending a launch where the sky is almost completely obscured by clouds at 5,000 feet except for a ~1,000 foot wide "hole" directly over the launch pads. Is it okay to launch a High Power Rocket to 6,000 feet if there’s a Certificate of Waiver or Authorization (COA) granting Class 2 flights up to 8,000 feet?
A. Yes, as long as the High Power Rocket stays within the cloud opening
B. No, the five-tenths coverage and horizontal visibility limitations apply
C. Yes, as long as the RSO approves the launch and the COA is active
D. Both "A" and "B" above.

 

Question A17
Which of the following (hypothetical) rocket motors is NOT a High Power Rocket Motor?
A. An F90 with 40 grams of propellant
B. An H60 with 62 grams of propellant
C. A G35 with 66 grams of propellant
D. All of the above are High Power Rocket Motors

 

Question A18
What information does FAA FAR 101.29(a) require you to provide when filing for FAA Launch Authorization?
A. Estimated number of rockets and type of propulsion (liquid or solid), fuel(s) and oxidizer(s)
B. Description of the launcher(s) planned to be used, including any airborne platform(s) and description of recovery system
C. Highest altitude, above ground level, expected to be reached, launch site latitude, longitude, and elevation, and any additional safety procedures that will be followed
D. All of the above

 

Question A19
Which of the following are operating limitations for Class 2 High Power Rockets per the FAA's FAR 101 Regulations?
A. At any altitude where clouds or obscuring phenomena of more than five-tenths coverage prevails
B. At any altitude where the horizontal visibility is less than five miles
C. Into any cloud
D. All of the above

 

Question A20
According to NFPA 1127, a High Power Rocket shall only be launched if:
A. It contains any combination of motors having 40,960 Newton-secondsof total impulse or less
B. It contains a recovery system that is designed to return all parts to the ground intact and at a landing speed which the rocket does not present a hazard
C. It utilizes an electronically actuated recovery system as either a primary or backup deployment method if the installed total impulse is greater than 2560 Newton-seconds
D. All of the above

 

Question B3
What does the "5" in the motor designation H100-5 stand for?
A. It is the peak thrust (in kilograms) of the rocket motor
B. It is the rocket motor burn time
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
B. feet per second
C. Newtons per second
D. Newton-seconds

 

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

 

Question C1
What is the maximum launch angle, measured from vertical, for a high power rocket?
A. 10 degrees
B. 15 degrees
C. 20 degrees
D. 25 degrees

 

Question C3
The minimum launch site dimension for your field is 1500 feet. Assuming no public highways or occupied buildings in the area, what is the minimum distance between the launch site boundary and the launcher for a 320 Newton-second motor?
A. 750 feet
B. 100 feet
C. The launcher may be located anywhere on the launch site to compensate for wind
D. 320 feet

 

Question C5
The FAA has granted a waiver for high power rocket flight to 18000 feet for your event. Flights up to that altitude are expected. What is the minimum launch site dimension?
A. 18,000 feet
B. 1800 feet
C. 4500 feet
D. 9000 feet

 

Question C9
A farm owner offers you his farm for a launch site. His house is located in the middle of the farm, which is two (2) miles square. What is the minimum distance allowable for location of a high power launch pad from the owner's house, assuming it is occupied?
A. 3000 feet
B. You cannot launch unless the house is empty
C. 750 feet
D. 1500 feet

 

Question C12
What is the minimum safe distance from a high power rocket containing three (3) "H" motors?
A. 100 feet
B. 50 feet
C. 200 feet
D. 75 feet

 

Question C14
Which of the following igniters may be ignited by the continuity test of some launch controllers?
A. Nichrome wire
B. Flashbulbs
C. Very low current electric matches
D. Both "B" and "C" above

 

Question C16
Which of the following is most likely to cause catastrophic failure of a black powder rocket motor?
A. Electromagnetic fields
B. High altitude
C. Vibration
D. Temperature cycling

 

Question C18
When should igniters installed in rocket motors be checked for continuity?
A. Only on the launch pad when ready for launch
B. Only in an enclosed shelter
C. Any time
D. Igniters should never be checked for continuity while installed in a rocket motor

 

Question C20
Which of the following adhesives should not be used on rubber (or elastic) shock cord components?
A. Slow-curing epoxy adhesives
B. White "Elmer's" glue
C. Cyanoacrylate glues (super glue)
D. Aliphatic resin-based (yellow) glues

 

Question C22
Which of the following adhesives is the best choice for motor mount construction using phenolic motor tubes?
A. Slow-curing epoxy adhesives
B. Aliphatic resin based glues
C. Cyanoacrylate glues (super glue)
D. "Hot melt" adhesives

 

Question C24
A small hole is typically recommended near the top, but below the nosecone or payload section shoulder, of a high power rocket's booster section. Why?
A. The hole vents internal air pressure as the rocket gains altitude to prevent internal air pressure from prematurely separating the model
B. The hole allows easy verification that a parachute is installed
C. The hole is used to give air pressure readings for on board altimeters prematurely separating the model
D. This hole allows excessive ejection charge pressures to vent to reduce shock cord stress

 

Question C29
Petroleum based lubricants should not be used with the oxygen or nitrous oxide systems used in hybrids. Why?
A. There is a risk of spontaneous ignition or explosion
B. They thicken when exposed to oxygen or nitrous oxide
C. They lose their lubricating properties when exposed to oxygen or nitrous oxide
D. The lubricant can promote corrosion of the metal components in the presence oxygen or nitrous oxide

 

Question C34
Which of the following individuals has the ultimate responsibility to ensure that the rocket was built in a safe manner?
A. The launch control officer (LCO)
B. The safety monitor (range safety officer or RSO)
C. The rocket owner/builder
D. All of the above

 

Question C35
Parachute ejection systems that sense barometric pressure can malfunction during supersonic flight because:
A. Aerodynamic heating changes the values of electronic components.
B. The outside pressure distribution is not continuous around the model.
C. Static discharges will "zap" sensitive electronic components.
D. Both answers "A" and "B" are correct.

 

Question C36
Your rocket was returned from its flight with "zipper" damage where the shock cord tore through the model. What is the most likely cause:
A. Parachute ejection occurred too soon after motor burnout
B. Parachute ejection occurred too late after apogee
C. Parachute ejection occurred at apogee on a vertical flight
D. Both "A" and "B"

 

Question C38
What is the distance around a launcher for a "J" powered model that must be cleared of easy to burn material, assuming the motor isn't "sparky?"
A. 10 feet
B. 50 feet
C. 30 feet
D. 75 feet

 

Question C39
What is the distance around a launcher for a rocket using a 3-motor cluster of J motors that must be cleared of easy to burn material, assuming the motors aren't "sparky?"
A. 75 feet
B. 50 feet
C. 10 feet
D. 30 feet

 

Question C41
What is "titanium sponge?"
A. A substitute for ejection wadding
B. A lightweight material used in nose cones on supersonic rockets
C. An ingredient used in some rocket motors that causes them to eject sparks in the exhaust
D. An effective cleaning tool for high power rocket motor casings

 

Question C46
When should onboard energetics and/or electronic controls be activated and when should they be inhibited?
A. The function of firing circuits and onboard energetics shall be inhibited until the high power rocket is in the launching position, than they can be activated when non-essential personal leave the pad area.
B. When the rocket is in the prep area.
C. Both "A" and "D"
D. The function of firing circuits and onboard energetics shall be inhibited prior to removing the high power rocket from the launching position, and doing so only when non-essential personal are not in the pad area

 

Question C50
Your field is 1500 x 1500 feet, and your FAA waiver is 3000 feet AGL. If you use parachutes sized to bring your rocket down at 20 feet per second, what is the maximum wind you can fly in for rockets that fly to the waiver altitude?
A. You can fly at 15 mph, if you have the pads at the upwind edge of the field, tilt into the wind and the rocket flies vertically
B. You are limited only by the HPR maximum wind of 20 miles per hour
C. This field can only be used in calm winds for flights to the waiver altitude
D. You can fly in winds up to about 6 miles an hour, if you have the pads at the upwind edge of the field

 

Question C52
According to NFPA 1127, which of the following are prohibited activities for participants prepping or launching high power rockets and for spectators in the prepping areas?
A. Consumption of alcohol
B. Use of medication that could affect judgment, movement, or stability
C. Both "A" and "B" above
D. None of the above

 

Question C53
According to NFPA 1127, High Power Rocket motors, motor reloading kits, and pyrotechnic modules shall be stored at least __________ away from smoking, open flames, and other sources of heat.
A. 10 feet
B. 50 feet
C. 25 feet
D. 75 feet

 

Question C55
What is a common safety practice to follow just before hooking up the igniter leads to a rocket?
A. Check the skies to ensure no aircraft are in the area
B. Run an additional simulation to ensure the rocket and motor are a safe combination
C. Stand next to the rocket for a photograph
D. Touch the igniter clips together to test for sparks in case the launch system is still accidentally energized

 

Question C57
Twisted wire pairs in rocket wiring are considered good practice because:
A. It improves the routing of wire bundles
B. It reduces strain on solder joints
C. It resists electromagnetic interference from internal and external sources
D. It reduces resistance in wire bundles

 

Question D1
For a rocket to be stable which of the following statements is true?
A. The center of pressure (CP) must be in front of the center of gravity (CG)
B. The length of the body tube must be at least 5 times the model diameter
C. The center of pressure (CP) must be behind the center of gravity (CG)
D. The rocket must have fins

 

Question D2
An unstable rocket can be made stable by:
A. Removing sufficient weight from the nosecone
B. Moving the fins sufficiently forward towards the nosecone
C. Adding sufficient weight to the nosecone
D. Making the rocket sufficiently shorter

 

Question D4
A rocket's center of pressure can be estimated by:
A. The "Barrowman" method
B. Finding the point where the model balances
C. "Cardboard cutout" method
D. Both "A" and "C" above

 

Question E1
What is the airspeed velocity of an unladen swallow?
A. Mach 1
B. African or European?
C. c
D. 1 furlong per fortnight