NAR HPR Level 2 Certification Practice Exam
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Question A3
What is the maximum launch weight allowable for a rocket which does not require a FAA Certificate of Waiver or Authorization (COA)?
A. 1 pound (453 grams)
B. 3.3 pounds (1500 grams)
C. 4 ounces (113 grams)
D. 4.4 ounces (125 grams)
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Question A5
Which of the following is a requirement for High Power Rocket Motor User Certification [Note: Excludes NAR Jr. HPR Participation Program]:
A. A citizen of the United States of America
B. The ability to understand written English instructions
C. No felony convictions
D. A minimum of 18 years of age
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Question A6
What is the maximum total impulse permitted in a high power rocket per NFPA 1127?
A. There is no impulse limit provided the altitude requirements listed in the FAA Certificate of Waiver or Authorization (COA) are not exceeded
B. 20,480 Newton-seconds
C. 81,920 Newton-seconds
D. 40,960 Newton-seconds
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Question A7
What is the maximum allowable weight for a High Power Rocket permitted per NFPA 1127?
A. 400 pounds
B. 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
C. 100 pounds
D. 3069 pounds
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Question A10
Which of the following is (are) true of a complex high power rocket per NFPA 1127?
A. The rocket is multi-staged or propelled by a cluster of rocket motors
B. The rocket contains electrical or electronic devices intended for control of the rockets functions, e.g. staging, recovery initiation
C. The rocket uses other than parachute or streamer recovery, e.g. helicopter or glide recovery
D. Both "A" and "B" above
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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
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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 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 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 A22
According to NFPA 1127, the definition of a High Power Rocket is a rocket vehicle that:
A. Is propelled by one or more High Power Rocket motors
B. Is propelled by a combination of model rocket motors having an installed total impulse of more than 320 Newton-seconds or a combination of model rocket motors having more than a total of 125 grams (4.4 ounces) of propellant weight
C. Weighs more than 1500 grams (53 ounces or 3.3 pounds) with motor(s) installed
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. feet per second
B. Newtons
C. Newton-seconds
D. Newtons per second
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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. 4
B. 2
C. 3
D. 1
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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. "K"
C. "J"
D. "I"
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Question C2
What is the maximum wind velocity allowable for launch operations?
A. 30 miles per hour
B. 15 miles per hour
C. 25 miles per hour
D. 20 miles per hour
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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. 320 feet
B. 750 feet
C. 100 feet
D. The launcher may be located anywhere on the launch site to compensate for wind
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Question C4
You plan to break the altitude record for H motors with a flight to 10,900 feet. You have a field that is 6000 feet by 6000 feet. You have an FAA waiver up to 12,000 feet. Assuming no public highways or occupied buildings are in the area, what is the minimum distance between the launch site boundary and the launcher for an H-powered altitude record attempt?
A. 3000 feet
B. The launcher may be located anywhere on the launch site to compensate for wind.
C. 1500 feet
D. 100 feet
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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. 9000 feet
D. 4500 feet
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Question C7
Except as provided in NFPA 1127 Paragraph 4.14.2(3), in no case shall the minimum launch site dimension be less than __________ the estimated altitude of the high power rocket or __________.
A. 1/4, 2500 feet
B. 1/2, 2500 feet
C. 1/2, 1500 feet
D. 1/4, 1500 feet
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Question C8
Your launch site borders on an interstate freeway. What is the minimum distance allowable for location of a high power launch pad from the interstate freeway?
A. 750 feet
B. 5280 feet (1 mile)
C. 3000 feet
D. 1500 feet
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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. You cannot launch unless the house is empty
B. 3000 feet
C. 1500 feet
D. 750 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. C) Yes, but the house has to be empty
D. D) No
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Question C12
What is the minimum safe distance from a high power rocket containing three (3) "H" motors?
A. 50 feet
B. 200 feet
C. 75 feet
D. 100 feet
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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
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Question C21
Which of the following adhesives is most likely to be weakened under humid or wet weather conditions?
A. Slow-curing epoxy adhesives
B. Cyanoacrylate glues (super glue)
C. White "Elmer's" glue
D. Aliphatic resin based glues
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Question C27
If individual igniters are used for igniting a clustered model's motors, which of the following statements is typically true:
A. The launch control must provide higher voltage to ignite the additional igniters
B. The launch control must have an audible as well as visual indication of igniter continuity.
C. The launch control must provide additional current to ignite the additional igniters
D. The launch control must use a car battery as a power source
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Question C33
Which of the following individuals has the final authority in permitting a high power rocket to fly?
A. The rocket owner
B. The check-in officer
C. The launch control officer (LCO)
D. The range safety officer (RSO)
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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"
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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 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
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Question C42
Consequences of inadequate motor retention can include:
A. The motor being ejected at apogee instead of the parachute, resulting in two falling objects
B. The motor being ejected from a cluster, and flying on its own, under power
C. The motor flying through the rocket, destroying it
D. All of the above
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Question C43
According to NAR studies, the vast majority of unsuccessful flights fail because of:
A. Rocket motor malfunctions
B. Rockets that are structurally unsound
C. Recovery system failures
D. Rocket designs that are unstable
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Question C44
The kinetic energy of a descending rocket is a function of:
A. Its mass
B. Its mass times the square of its velocity
C. Its velocity
D. Its mass times its velocity
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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 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. 75 feet
D. 25 feet
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Question C56
An electronically actuated recovery system, as either a primary or backup deployment method, is required if the installed total impulse exceeds:
A. 1280 N-sec
B. 2560 N-sec
C. 5120 N-sec
D. 10240 N-sec
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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 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
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Question D7
Which of the following can cause unstable flight?
A. Weak tubes or couplers that permit airframe bending
B. Misaligned motor mount tube or motor nozzle
C. Inadequate airspeed leaving the launch tower on a breezy day
D. All of the above
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Question D8
As a rule of thumb, how far should the center of pressure be from the center of gravity?
A. The center of pressure should be 1.0 body tube diameters ahead of the fin leading edge; the center of gravity does not matter
B. The center of pressure should be at the same location as the center of gravity
C. The center of pressure should be at least 1.0 body tube diameters ahead of the center of gravity
D. The center of pressure should be at least 1.0 body tube diameters behind the center of gravity
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Question E1
What is the airspeed velocity of an unladen swallow?
A. 1 furlong per fortnight
B. Mach 1
C. African or European?
D. c
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