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 1122
B. NFPA 1124
C. NFPA 1125
D. NFPA 1127
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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. 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 A5
Which of the following is a requirement for High Power Rocket Motor User Certification [Note: Excludes NAR Jr. HPR Participation Program]:
A. A minimum of 18 years of age
B. A citizen of the United States of America
C. No felony convictions
D. The ability to understand written English instructions
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Question A6
What is the maximum total impulse permitted in a high power rocket per NFPA 1127?
A. 81,920 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. 40,960 Newton-seconds
D. 20,480 Newton-seconds
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Question A12
A person shall fly a high power rocket only in compliance with:
A. NFPA 1127
B. Federal Aviation Administration Regulations, Part 101
C. Federal, state, and local laws, rules, regulations, statutes, and ordinances
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 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 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
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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 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. 2
B. 3
C. 1
D. 4
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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 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. 100 feet
B. 750 feet
C. 320 feet
D. The launcher may be located anywhere on the launch site to compensate for wind
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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. 18,000 feet
B. 1800 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. 1250 feet
D. 1500 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. 1/4, 1500 feet
C. 1/2, 1500 feet
D. 1/2, 2500 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. 5 minutes
C. 60 seconds
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. Temperature cycling
B. High altitude
C. Vibration
D. Electromagnetic fields
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Question C17
Unless the motor manufacturer instructs otherwise, igniters for clustered rocket motors should be wired together in:
A. Short Circuit
B. Open
C. Series
D. Parallel
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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. Slow-curing epoxy adhesives
B. Aliphatic resin based glues
C. Cyanoacrylate glues (super glue)
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. It does not matter which motors are ignited first
D. Black powder rocket motors should be ignited first
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Question C26
Why should composite motors be ignited first in a mixed composite and black powder cluster?
A. The exhaust products from black powder motors prevent composite motor ignition
B. Composite motors are more likely to "cato" than black powder motors
C. Composite rocket motors are more powerful than black powder motors
D. Composite motors are more difficult and take longer to ignite
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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 use a car battery as a power source
D. The launch control must provide additional current to ignite the additional igniters
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Question C28
What is (are) the advantages of using a "relay" type launch control?
A. It is cheaper than a non-relay launch control
B. The relay allows a better indication of igniter continuity
C. It can deliver more power to the rocket motor igniters
D. Both "B" and "C" above
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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 individual who "checked-in" the model
B. The safety monitor's (RSO) decision cannot be overturned by anyone
C. The Launch Control Officer (LCO)
D. Three certified high power fliers who agree the model is safe
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Question C32
Parachute ejection systems that sense barometric pressure for activation need a vent to the outside in their compartment because:
A. This hole vents internal air pressure as the rocket gains altitude to prevent internal air pressure from prematurely separating the model
B. This hole allows excessive ejection charge pressures to vent
C. The hole is used to sample air pressure outside the rocket's airframe
D. The hole allows easy verification that the battery is installed
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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 range safety officer (RSO)
B. The rocket owner
C. The check-in officer
D. The launch control officer (LCO)
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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 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 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. 75 feet
D. 30 feet
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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. 30 feet
D. 10 feet
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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 C47
What equipment is required at launch sites?
A. Fire suppression devices and First aid kits
B. Fire Suppression devices such as fire extinguishers
C. First aid kits
D. Fire suppression devices, First aid kits, and a way of communicating with everyone on the launch site
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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 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. You can fly in winds up to about 6 miles an hour, if you have the pads at the upwind edge of the field
D. This field can only be used in calm winds for flights to the waiver altitude
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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 improves the routing of wire bundles
C. It reduces resistance in wire bundles
D. It reduces strain on solder joints
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Question C58
Black powder charges for recovery systems can be unintentionally fired by:
A. Electrostatic discharge (static electricity)
B. Electromagnetic fields, e.g. nearby radios
C. Control electronics malfunction
D. All of the above
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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 D2
An unstable rocket can be made stable by:
A. Adding sufficient weight to the nosecone
B. Making the rocket sufficiently shorter
C. Removing sufficient weight from the nosecone
D. Moving the fins sufficiently forward towards the nosecone
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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
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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
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