NAR HPR Level 2 Certification Practice Exam
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Question A1
Which of the following National Fire Protection Association standards provides a code for high power rocketry?
A. NFPA 1124
B. NFPA 1122
C. NFPA 1127
D. NFPA 1125
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Question A4
What is the maximum propellant weight allowable for a rocket which does not require a FAA Certificate of Waiver or Authorization (COA)?
A. 4 ounces (113 grams)
B. 1 pound (453 grams)
C. 4.4 ounces (125 grams)
D. 3.3 pounds (1500 grams)
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Question A6
What is the maximum total impulse permitted in a high power rocket per NFPA 1127?
A. 40,960 Newton-seconds
B. There is no impulse limit provided the altitude requirements listed in the FAA Certificate of Waiver or Authorization (COA) are not exceeded
C. 20,480 Newton-seconds
D. 81,920 Newton-seconds
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Question A8
What is the minimum age for user certification? [Note: Excludes NAR Jr. HPR program]
A. 16 years old
B. 18 years old
C. 21 years old
D. 25 years old
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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
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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.
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Question A16
Which of the following statements are true concerning the definition of a High Power Rocket Motor?
A. Total impulse is less than 81,920 Newton-seconds
B. The total impulse is more than 160 Newton-seconds
C. The motor must use either fiberglass or metal case materials
D. Both A and B above
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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
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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
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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
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Question B4
What are the units of measurement for the "100" in the motor designation H100-5?
A. Newtons per second
B. feet per second
C. Newtons
D. Newton-seconds
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Question B5
What is the maximum total 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
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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
B. 2
C. 4
D. 1
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Question C2
What is the maximum wind velocity allowable for launch operations?
A. 25 miles per hour
B. 15 miles per hour
C. 30 miles per hour
D. 20 miles per hour
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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. 1800 feet
B. 18,000 feet
C. 4500 feet
D. 9000 feet
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Question C6
The FAA has granted a waiver for high power rocket flight to 2500 feet for your 2xN clusterpowered rocket. What are the minimum launch site dimensions?
A. 500 feet
B. 4000 feet
C. 1500 feet
D. 1250 feet
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Question C10
A farm owner offers you his farm for a launch site. His house is located in the middle of the farm, which is one quarter (1/4) mile by one quarter (1/4) mile square. Assuming you can get an FAA waiver for 2500 feet, can you conduct a high power launch from this farm?
A. B) Yes, but the pads have to be the minimum personnel distance from the edge of the field.
B. A) Yes
C. D) No
D. C) Yes, but the house has to be empty
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Question C11
What is the minimum safe distance from a high power rocket containing a single "I" motor?
A. 50 feet
B. 75 feet
C. 100 feet
D. 200 feet
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Question C13
What is the minimum safe distance from a high power rocket containing two (2) "K" motors?
A. 300 feet
B. 500 feet
C. 100 feet
D. 50 feet
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Question C15
In the event of a misfire how long should you wait before approaching the launch pad?
A. As soon as signs of smoke are gone
B. 60 seconds
C. 5 minutes
D. 15 seconds
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Question C16
Which of the following is most likely to cause catastrophic failure of a black powder rocket motor?
A. High altitude
B. Vibration
C. Electromagnetic fields
D. Temperature cycling
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Question C17
Unless the motor manufacturer instructs otherwise, igniters for clustered rocket motors should be wired together in:
A. Open
B. Short Circuit
C. Parallel
D. Series
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Question C18
When should igniters installed in rocket motors be checked for continuity?
A. Only on the launch pad when ready for launch
B. Igniters should never be checked for continuity while installed in a rocket motor
C. Any time
D. Only in an enclosed shelter
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Question C20
Which of the following adhesives should not be used on rubber (or elastic) shock cord components?
A. Aliphatic resin-based (yellow) glues
B. White "Elmer's" glue
C. Slow-curing epoxy adhesives
D. Cyanoacrylate glues (super glue)
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Question C22
Which of the following adhesives is the best choice for motor mount construction using phenolic motor tubes?
A. Aliphatic resin based glues
B. Cyanoacrylate glues (super glue)
C. Slow-curing epoxy adhesives
D. "Hot melt" adhesives
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Question C23
The centering rings provided with your high power kit are a loose fit around the phenolic motor tube. Which of the following adhesives is the best choice for a strong joint?
A. Aliphatic resin based glues
B. Cyanoacrylate glues (super glue)
C. Slow-curing epoxy adhesives
D. "Hot melt" adhesives
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Question C25
When clustering combinations of black powder and composite motors, which type of rocket motor should be ignited first?
A. Composite rocket motors should be ignited first
B. Clusters should never mix composite and black powder motors
C. Black powder rocket motors should be ignited first
D. It does not matter which motors are ignited first
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Question C26
Why should composite motors be ignited first in a mixed composite and black powder cluster?
A. Composite rocket motors are more powerful than black powder motors
B. Composite motors are more likely to "cato" than black powder motors
C. Composite motors are more difficult and take longer to ignite
D. The exhaust products from black powder motors prevent composite motor ignition
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Question C31
The range safety officer says that your model is unsafe to fly. Who has the authority to overturn this ruling:
A. The Launch Control Officer (LCO)
B. The safety monitor's (RSO) decision cannot be overturned by anyone
C. Three certified high power fliers who agree the model is safe
D. The individual who "checked-in" the model
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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
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Question C37
Your payload section, with heavy payload, separated from your model immediately after motor burnout. What might be the cause?
A. The center of pressure at burnout was behind the center of gravity for the model
B. The payload shoulder was too loose in the body tube
C. The rocket motor had a failure of its delay system
D. Both "B" and "C" are correct
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Question C43
According to NAR studies, the vast majority of unsuccessful flights fail because of:
A. Recovery system failures
B. Rocket designs that are unstable
C. Rocket motor malfunctions
D. Rockets that are structurally unsound
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Question C48
The Range Safety Officer (RSO) is concerned about your High Power Rocket's stability. Which of the following can be applied to determine the model's stability?
A. Fly a sub-scale, model rocket version of the actual model
B. Perform manual calculations to determine the rocket's Center of Pressure (CP) location and verify the prelaunch Center of Gravity (CG) location
C. Provide simulation data showing the rocket's Center of Pressure (CP) location and prelaunch Center of Gravity (CG) locations
D. All of the above
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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 in winds up to about 6 miles an hour, if you have the pads at the upwind edge of the field
B. 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
C. You are limited only by the HPR maximum wind of 20 miles per hour
D. This field can only be used in calm winds for flights to the waiver altitude
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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
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Question C55
What is a common safety practice to follow just before hooking up the igniter leads to a rocket?
A. Stand next to the rocket for a photograph
B. Check the skies to ensure no aircraft are in the area
C. Touch the igniter clips together to test for sparks in case the launch system is still accidentally energized
D. Run an additional simulation to ensure the rocket and motor are a safe combination
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Question C57
Twisted wire pairs in rocket wiring are considered good practice because:
A. It resists electromagnetic interference from internal and external sources
B. It reduces resistance in wire bundles
C. It improves the routing of wire bundles
D. It reduces strain on solder joints
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Question D2
An unstable rocket can be made stable by:
A. Making the rocket sufficiently shorter
B. Moving the fins sufficiently forward towards the nosecone
C. Adding sufficient weight to the nosecone
D. Removing sufficient weight from the nosecone
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Question D3
Rocket stability can be estimated by:
A. Stability cannot be estimated before a test flight.
B. Center of pressure "Barrowman" equations
C. "Cardboard cutout" method
D. Determining the relative positions of the center of pressure and center of gravity
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Question D9
The definition of Positive Stability in regards to a rocket is:
A. Where the center of gravity (CG) is located ahead (forward) of the center of pressure (CP)
B. Where the center of gravity (CG) and the center of pressure (CP) lie at the same locations
C. Where the center of gravity (CG) is located behind (aft) of the center of pressure (CP)
D. None of the above
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Question E1
What is the airspeed velocity of an unladen swallow?
A. 1 furlong per fortnight
B. Mach 1
C. c
D. African or European?
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