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

 

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. Total impulse is more than 160 Newton-seconds
C. Propellant weight greater than 125 grams
D. The motor uses a "composite" propellant

 

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 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 A14
You're attending a launch that has a thin (but see-through) cloud layer at ~3,000 feet and clear blue skies above it. Is it okay to "punch" through this cloud layer with a High Power Rocket if there's a Certificate of Waiver or Authorization (COA) granting Class 2 flights up to 6,000 feet?
A. Yes, since there is an active COA, High Power Rockets can be flown up to the 6,000 foot altitude limit
B. No, flights into any clouds are prohibited unless specifically waived by the FAA
C. Yes, as long as the cloud layer can barely be seen through and the RSO allows it
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 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 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 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 rocket motor burn time in seconds
C. It is the average thrust in Newtons of the rocket motor
D. It is the peak thrust in pounds of the rocket motor

 

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 average thrust of the rocket motor
D. It is the ejection charge delay time

 

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 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

 

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

 

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. The launcher may be located anywhere on the launch site to compensate for wind.
B. 100 feet
C. 1500 feet
D. 3000 feet

 

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. 4500 feet
C. 1800 feet
D. 9000 feet

 

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. 1250 feet
B. 4000 feet
C. 500 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 C13
What is the minimum safe distance from a high power rocket containing two (2) "K" motors?
A. 50 feet
B. 500 feet
C. 300 feet
D. 100 feet

 

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 C21
Which of the following adhesives is most likely to be weakened under humid or wet weather conditions?
A. Cyanoacrylate glues (super glue)
B. White "Elmer's" glue
C. Aliphatic resin based glues
D. Slow-curing epoxy adhesives

 

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. The hole is used to give air pressure readings for on board altimeters prematurely separating the model
C. This hole allows excessive ejection charge pressures to vent to reduce shock cord stress
D. The hole allows easy verification that a parachute is installed

 

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

 

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. 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 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. Three certified high power fliers who agree the model is safe
D. The Launch Control Officer (LCO)

 

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 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

 

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 C47
What equipment is required at launch sites?
A. Fire suppression devices and First aid kits
B. First aid kits
C. Fire Suppression devices such as fire extinguishers
D. Fire suppression devices, First aid kits, and a way of communicating with everyone on the launch site

 

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 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

 

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 strain on solder joints
C. It improves the routing of wire bundles
D. It reduces resistance in wire bundles

 

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

 

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

 

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

 

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 at least 1.0 body tube diameters ahead of the center of gravity
B. The center of pressure should be 1.0 body tube diameters ahead of the fin leading edge; the center of gravity does not matter
C. The center of pressure should be at the same location as the center of gravity
D. The center of pressure should be at least 1.0 body tube diameters behind 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