NAR HPR Level 2 Certification Practice Exam
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Question A2
What part of the Federal Aviation Regulations govern rocket activity?
A. Part 125
B. Part 97
C. Part 101
D. Part 95
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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
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Question A8
What is the minimum age for user certification? [Note: Excludes NAR Jr. HPR program]
A. 25 years old
B. 21 years old
C. 16 years old
D. 18 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. Average thrust greater than 80 Newtons
B. Propellant weight greater than 125 grams
C. The motor uses a "composite" propellant
D. Total impulse is more than 160 Newton-seconds
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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 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 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 B2
What does the "100" in the motor designation H100-5 stand for?
A. It is the manufacturer's retail price code
B. It is the average thrust in Newtons of the rocket motor
C. It is the peak thrust in pounds of the rocket motor
D. It is the rocket motor burn time in 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. 4
C. 1
D. 3
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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. "K"
B. "I"
C. "H"
D. "J"
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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
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Question C2
What is the maximum wind velocity allowable for launch operations?
A. 15 miles per hour
B. 25 miles per hour
C. 30 miles per hour
D. 20 miles per hour
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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. 18,000 feet
B. 1800 feet
C. 4500 feet
D. 9000 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. 5280 feet (1 mile)
B. 3000 feet
C. 1500 feet
D. 750 feet
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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 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. 15 seconds
C. 60 seconds
D. 5 minutes
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Question C17
Unless the motor manufacturer instructs otherwise, igniters for clustered rocket motors should be wired together in:
A. Series
B. Open
C. Parallel
D. Short Circuit
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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. This hole allows excessive ejection charge pressures to vent to reduce shock cord stress
B. The hole vents internal air pressure as the rocket gains altitude to prevent internal air pressure from prematurely separating the model
C. The hole is used to give air pressure readings for on board altimeters prematurely separating the model
D. The hole allows easy verification that a parachute is installed
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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. Clusters should never mix composite and black powder motors
B. Black powder rocket motors should be ignited first
C. Composite 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 motors are more difficult and take longer to ignite
B. The exhaust products from black powder motors prevent composite motor ignition
C. Composite motors are more likely to "cato" than black powder motors
D. Composite rocket motors are more powerful than black powder motors
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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 use a car battery as a power source
C. The launch control must provide additional current to ignite the additional igniters
D. The launch control must have an audible as well as visual indication of igniter continuity.
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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 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 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. An ingredient used in some rocket motors that causes them to eject sparks in the exhaust
C. An effective cleaning tool for high power rocket motor casings
D. A lightweight material used in nose cones on supersonic rockets
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Question C43
According to NAR studies, the vast majority of unsuccessful flights fail because of:
A. Rocket motor malfunctions
B. Rocket designs that are unstable
C. Recovery system failures
D. Rockets that are structurally unsound
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Question C44
The kinetic energy of a descending rocket is a function of:
A. Its mass times the square of its velocity
B. Its mass
C. Its mass times its velocity
D. Its velocity
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Question C47
What equipment is required at launch sites?
A. Fire suppression devices and First aid kits
B. First aid kits
C. Fire suppression devices, First aid kits, and a way of communicating with everyone on the launch site
D. Fire Suppression devices such as fire extinguishers
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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 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
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Question C57
Twisted wire pairs in rocket wiring are considered good practice because:
A. It reduces resistance in wire bundles
B. It reduces strain on solder joints
C. It resists electromagnetic interference from internal and external sources
D. It improves the routing of wire bundles
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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 D5
An unstable rocket can usually be made more stable by:
A. Increasing the rocket diameter
B. Increasing the size of the aft fins
C. Using a shorter nosecone
D. Using a larger, heavier rocket motor
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Question D6
During boost a rocket powered by a solid rocket motor tends to:
A. Have no change in stability
B. Become unstable
C. Become more stable in flight
D. Become less stable in flight
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Question E1
What is the airspeed velocity of an unladen swallow?
A. Mach 1
B. African or European?
C. 1 furlong per fortnight
D. c
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