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. 4.4 ounces (125 grams)
B. 3.3 pounds (1500 grams)
C. 4 ounces (113 grams)
D. 1 pound (453 grams)

 

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

 

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. 81,920 Newton-seconds
C. 40,960 Newton-seconds
D. 20,480 Newton-seconds

 

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

 

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 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 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

 

Question B3
What does the "5" in the motor designation H100-5 stand for?
A. It is the peak thrust (in kilograms) of the rocket motor
B. It is the rocket motor burn time
C. It is the ejection charge delay time
D. It is the average thrust of the rocket motor

 

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

 

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

 

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

 

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. 1/2, 2500 feet
C. 1/4, 1500 feet
D. 1/4, 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. 750 feet
B. 5280 feet (1 mile)
C. 1500 feet
D. 3000 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 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

 

Question C11
What is the minimum safe distance from a high power rocket containing a single "I" motor?
A. 200 feet
B. 50 feet
C. 75 feet
D. 100 feet

 

Question C12
What is the minimum safe distance from a high power rocket containing three (3) "H" motors?
A. 100 feet
B. 50 feet
C. 75 feet
D. 200 feet

 

Question C14
Which of the following igniters may be ignited by the continuity test of some launch controllers?
A. Nichrome wire
B. Flashbulbs
C. Very low current electric matches
D. Both "B" and "C" above

 

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

 

Question C19
Which of the following is the preferred method for attaching fins to a high power rocket?
A. All fin mounting methods are all equally strong; it does not matter
B. Tube surface mounting
C. "Though the wall" mounting
D. "Wedge" mount

 

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

 

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

 

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 rocket motors are more powerful than black powder motors
D. Composite motors are more likely to "cato" than black powder motors

 

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

 

Question C29
Petroleum based lubricants should not be used with the oxygen or nitrous oxide systems used in hybrids. Why?
A. They thicken when exposed to oxygen or nitrous oxide
B. There is a risk of spontaneous ignition or explosion
C. They lose their lubricating properties when exposed to oxygen or nitrous oxide
D. The lubricant can promote corrosion of the metal components in the presence oxygen or nitrous oxide

 

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

 

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 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. 30 feet
D. 75 feet

 

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. 30 feet
B. 10 feet
C. 75 feet
D. 50 feet

 

Question C41
What is "titanium sponge?"
A. A lightweight material used in nose cones on supersonic rockets
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 substitute for ejection wadding

 

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

 

Question C45
You have an excellent flying field, except that when the winds are from the northwest at over 10 mph, rockets often drift into neighboring fields where you don't have permission to fly. Your alternatives include:
A. Limit flights to lower altitudes so rockets stay on the field
B. Move the launch pad closer to the NW edge of the field, provided there are no roads or houses within 1500 feet
C. Don't fly on days with problematic winds
D. All of the above

 

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

 

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

 

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

 

Question D6
During boost a rocket powered by a solid rocket motor tends to:
A. Become unstable
B. Have no change in stability
C. Become less stable in flight
D. Become more stable in flight

 

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 least 1.0 body tube diameters behind 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 the same location as the center of gravity

 

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