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 101
C. Part 95
D. Part 97

 

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. The ability to understand written English instructions
C. A citizen of the United States of America
D. No felony convictions

 

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

 

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

 

Question A13
Which of the following statements is always true concerning the definition of a hybrid rocket motor?
A. The fuel component is composed of either paper or plastic
B. The fuel is in a different physical state (solid, liquid, or gaseous) than the oxidizer
C. The oxidizer component is nitrous oxide
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 B2
What does the "100" in the motor designation H100-5 stand for?
A. It is the rocket motor burn time in seconds
B. It is the manufacturer's retail price code
C. It is the peak thrust in pounds of the rocket motor
D. It is the average thrust in Newtons of the rocket motor

 

Question B4
What are the units of measurement for the "100" in the motor designation H100-5?
A. feet per second
B. Newtons per second
C. Newtons
D. Newton-seconds

 

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

 

Question C2
What is the maximum wind velocity allowable for launch operations?
A. 15 miles per hour
B. 25 miles per hour
C. 20 miles per hour
D. 30 miles per hour

 

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. 320 feet
D. The launcher may be located anywhere on the launch site to compensate for wind

 

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. 1/2, 1500 feet
B. 1/4, 2500 feet
C. 1/4, 1500 feet
D. 1/2, 2500 feet

 

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. 1500 feet
C. 3000 feet
D. 750 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 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

 

Question C13
What is the minimum safe distance from a high power rocket containing two (2) "K" motors?
A. 50 feet
B. 300 feet
C. 500 feet
D. 100 feet

 

Question C15
In the event of a misfire how long should you wait before approaching the launch pad?
A. 5 minutes
B. As soon as signs of smoke are gone
C. 15 seconds
D. 60 seconds

 

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

 

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. This hole allows excessive ejection charge pressures to vent to reduce shock cord stress
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

 

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. It does not matter which motors are ignited first
D. Composite rocket motors should be ignited first

 

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

 

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. The lubricant can promote corrosion of the metal components in the presence oxygen or nitrous oxide
D. They lose their lubricating properties when exposed to oxygen or nitrous oxide

 

Question C30
Which of the following safety hazards may be associated with hybrid rocket motors?
A. High pressure gas, low temperatures (frostbite)
B. High pressure gas
C. Corrosive materials
D. Low temperatures (frostbite)

 

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 allows easy verification that the battery is installed
D. The hole is used to sample air pressure outside the rocket's airframe

 

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 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 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. Rockets that are structurally unsound
D. Recovery system failures

 

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. 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

 

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 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 reduces resistance in wire bundles
D. It resists electromagnetic interference from internal and external sources

 

Question C60
Which sequence below provides the highest level of range safety when launching a rocket utilizing an onboard electronically actuated recovery system?
A. Arm recovery system electronics, install igniter, touch igniter clips together, connect clips to igniter
B. Install igniter, touch igniter clips together, connect clips to igniter, arm recovery system electronics
C. Install igniter, arm recovery system electronics, touch igniter clips together, connect clips to igniter
D. None of the above

 

Question D3
Rocket stability can be estimated by:
A. Stability cannot be estimated before a test flight.
B. "Cardboard cutout" method
C. Center of pressure "Barrowman" equations
D. Determining the relative positions of the center of pressure and center of gravity

 

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 D5
An unstable rocket can usually be made more stable by:
A. Using a shorter nosecone
B. Using a larger, heavier rocket motor
C. Increasing the rocket diameter
D. Increasing the size of the aft fins

 

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