National Association of Rocketry (NAR) Level 2 Practice Exam

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• Which weight placement best supports stability by ensuring the center of gravity remains ahead of the center of pressure?
• What does the '100' in the motor designation H100-5 stand for?
• Which method can be used, in addition to the Barrowman method, to estimate a rocket's center of pressure?
• How does epoxy fillet contribute to structural integrity?
• Why is a small hole typically present near the top, but below the nosecone or payload section shoulder, of a high power rocket's booster section?
• If a field is 6000 by 6000 feet and you have a waiver to 12,000 feet, what is the minimum boundary-to-launcher distance for an altitude record attempt?
• In a hybrid rocket motor, which statement best describes the relationship between fuel and oxidizer?
• Rocket stability can be estimated by which approach?
• Which adhesive is the best choice for motor mount construction using phenolic motor tubes?
• What is the minimum safe distance from a high power rocket containing two (2) "K" motors?
• Which method is preferred for attaching fins to a high power rocket?
• Which statement best reflects the information required when filing an FAA waiver under FAR 101.29?
• What extra constraints apply when launching three or more high power rockets simultaneously?
• What is the minimum age for user certification?
• When filling an FAA waiver under FAR 101.29, which items must be provided?
• Name two common recovery methods used in high-power rockets.
• What battery safety practice helps prevent movement for high-power rocket avionics?
• Which impulse class corresponds to a total impulse of 600 Newton-seconds?
• Which factor explains why parachute ejection systems with barometric sensors might fail in flight conditions?
• Which factor most directly influences the center of pressure location aside from fin size/placement and nose cone shape?
• Why must motor total impulse be matched to the airframe’s rated capability?
• What role does backspacing or fin spacing play in stability?
• How can you minimize damage from ejection gases to the parachute?
• When clustering combinations of black powder and composite motors, which type of motor should be ignited first?
• Why is it important to inspect fins for cracks before a Level 2 flight?
• To address drifting due to winds greater than 10 mph from the northwest, which measures are recommended?
• When is activation of firing circuits allowed?
• What is the maximum propellant weight for a rocket without needing an FAA waiver?
• What is the purpose of a flight log entry for motor class and propellant?
• What is the maximum launch angle, measured from vertical, for a high power rocket?
• What is the maximum total impulse for a 'J' rocket motor?
• Which wind scenario applies to waiver altitude flights at a 1500 x 1500 ft field with a 3000 ft AGL waiver?
• What is the purpose of a flight readiness signal or beacon on a launch vehicle?
• If a motor has total impulse 320 N·s and burn time 5 s, what is the average thrust?
• If a centering ring is loose on the phenolic motor tube, which adhesive would most likely yield a strong joint?
• Which of the following igniters may be ignited by the continuity test of some launch controllers?
• What is altitude-based deployment and why is it used?
• Which condition is most likely to cause catastrophic failure of a black powder rocket motor?
• Which statement is NOT a requirement for an indoor Type 4 magazine?
• In some motors, titanium sponge is used to cause sparks in the exhaust. Which option describes this material?
• What is the recommended action if wind conditions make recovery planning unreliable?
• What should you do if a motor is not listed as approved by NAR for Level 2 flight?
• Which of the following is not listed as a safety hazard for hybrids?
• An unstable rocket can usually be made more stable by which action?
• Which of the following is true about high power operation limits under NFPA 1127?
• Which of the following is true regarding the purchase of high power rocket components by a certified person?
• How can you improve the reliability of a Level 2 deployment?
• What is meant by range rules in the context of NAR launches?
• Which statement about NFPA 1127's weight-thrust rule is correct?
• What is the minimum safe distance from a high power rocket containing three (3) "H" motors?
• A launch site is defined as containing areas for which activities?
• A person shall fly a high power rocket only in compliance with which regulations?
• In best practice, who should be appointed as a spotter for each rocket to warn the LCO of unsafe flight or recovery anomalies?
• A rocket's center of pressure can be estimated by which methods?
• Which statement best describes range rules?
• What is the maximum total impulse permitted in a high power rocket per NFPA 1127?
• To operate a rocket without FAA waiver, which propellant weight category is allowed?
• Which statement describes not an acceptable means to ensure safety for an unproven high-power rocket?
• The centering rings provided with your high power kit are a loose fit around the phenolic motor tube. Which adhesive is best for a strong joint?
• How should you respond to a failed Level 2 launch?
• For a clustered model using multiple igniters, which indication is typically required of igniter continuity?
• Parachute packing density should be:
• Assuming that each motor has the full allowable impulse, how many 'H' motors have the same total impulse as a single 'J' motor?
• 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'?
• Which characteristic does NOT meet the definition of a High Power Rocket Motor?
• What is 'titanium sponge'?
• How should a Level 2 rocket be balanced to achieve stable flight?
• In the designation H100-5, what does the H represent?
• What primarily indicates the structural load a rocket experiences at liftoff?
• Which impulse class corresponds to a total impulse of 1280 Newton-seconds?
• How is a rocket’s stability assessed during design?
• What does the '5' in the motor designation H100-5 stand for?
• What is the maximum wind velocity allowable for launch operations?
• The FAA has granted a waiver for high power rocket flight to 18,000 feet for your event. Flights up to that altitude are expected. What is the minimum launch site dimension?
• Which adhesive should be avoided for rubber shock cords to ensure long-term performance?
• What is the value of maintaining a detailed build log?
• The total impulse of a motor is measured in which units?
• Why is a quality control log important for Level 2 projects?
• What is the best practice for deploying a Level 2 rocket's recovery system in variable wind conditions?
• If the rocket's speed doubles while mass stays the same, by what factor does its kinetic energy increase?
• What is the primary design emphasis of Level 2 airframes?
• You have an H64-8 rocket motor which has total impulse 320.00 Newton seconds. What is the approximate burn time for this motor?
• According to NFPA 1127, which statement about a complex high power rocket is true?
• Which activities are prohibited for participants prepping or launching high power rockets and for spectators in prep areas?
• Which person has the ultimate responsibility to ensure that the rocket was built in a safe manner?
• The kinetic energy of a descending rocket is a function of:
• Per the ATF-Explosives Law and Regulation (Orange Book) what kind of explosive material is black powder?
• What is the minimum launch site dimension for a high power rocket under the 2500-foot waiver for a 2xN cluster-powered rocket?
• Which NFPA standard provides the code for high power rocketry?
• What is the difference between a single-use motor and a reloadable motor?
• Which adhesive is most susceptible to weakening in humid environments and is commonly used in general glue tasks?
• Which fin mounting method is considered the preferred choice for high power rockets?
• 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'?
• What is a flight readiness checklist?
• Which statement best describes deployment mechanism compatibility with avionics?
• For static stability, where must the center of pressure be relative to the center of gravity?
• Igniters for clustered rocket motors should be wired together in which configuration unless the motor manufacturer specifies otherwise?
• 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?
• What is the main reason for ensuring secure connections in a Level 2 rocket's wiring?
• Which activity is most likely to inform future design changes after a Level 2 flight?
• Thrust-to-weight ratio is defined as what?
• The minimum age for an explosive permit application is:
• When launching three or more rockets, what criterion determines the minimum spectator distance?
• In the event of a misfire how long should you wait before approaching the launch pad?
• Consequences of inadequate motor retention can include:
• What is the maximum wind limit for high-power rocket operations under general rules, regardless of waiver altitude?
• What is the maximum net weight of regulated materials that may be stored in an indoor Type 4 magazine?
• What is the minimum safe distance from a high power rocket containing a single "I" motor?
• What are the units of measurement for the '100' in the motor designation H100-5?
• How should parachute lines be arranged to prevent tangling?
• What is the recommended practice for transporting high-power rockets to a launch site?
• An unstable rocket can be stabilized by which action?
• What is the minimum age for an explosive permit application?
• Under NFPA 1127, which statement best describes the weight-thrust relationship for high power rockets?
• Under Orange Book classifications, black powder is considered which type of explosive material?
• If a launch site borders an interstate freeway, what minimum distance must the high power launch pad be from the interstate?
• What aerodynamic concept is affected by fin spacing and must be maintained for stability?
• Which statement best describes typical content in a Level 2 flight log?
• Which statement is always true concerning a hybrid rocket motor?
• For motor mounts using phenolic tubes, which adhesive is typically recommended for a durable joint?
• With a farm middle-of-field scenario and a waiver for 2500 feet, can you conduct a high power launch from this farm?
• What design approach reduces drag without compromising stability?
• Besides altitude, which metrics might be tracked during Level 2 flights?
• For a high power rocket containing two K motors, what is the minimum safe distance?
• During boost, a rocket powered by a solid rocket motor tends to become which of the following?
• The minimum launch site dimension must be at least half the estimated altitude of the high power rocket, but not less than how many feet?
• Which item is NOT typically included in Level 2 flight documentation?
• The manufacturer's test data shows a total impulse of 690 Newton-seconds for your motor. What impulse class does your motor represent?
• If a motor ejects at apogee in a rocket, which consequence is described in typical discussions of motor retention?
• 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?
• What is the maximum launch weight allowable for a rocket which does not require FAA waiver?
• In motor classification, what does total impulse describe?
• Which of the following is a requirement for high power certification?
• What does the 'H' in the motor designation H100-5 stand for?
• What criteria determine payload suitability for Level 2?
• For a high power rocket with three H motors, what is the minimum safe distance to the nearest person?
• Static stability is indicated when the center of pressure is behind the center of gravity by how much?
• In a continuity test, which items may be ignited on some launch controllers?
• Which document or regulation applies to conducting high power rocket flights?
• Which practices help prevent accidental ignition or arming of a high-power rocket?
• Which of the following can cause unstable flight?
• When evaluating a payload for Level 2 compatibility, which criterion is essential?
• What is the maximum total impulse allowed for a rocket which does not require an FAA waiver?
• Which of the following statements is true about a High Power Rocket Motor's total impulse?
• What is the distance around a launcher to clear of all combustible and burnable materials for a rocket using a single J motor that burns a titanium sponge to emit sparks?
• If parachute packing density is not proper, what issue could arise?
• Ground tests before flight are important because they:
• Which of the following is a valid wind constraint for high power rocket launches?
• What distance must be maintained for storage of high power rocket motors, motor reloading kits, and pyrotechnic modules from sources of heat?
• Which is a common sign of a faulty deployment system in a Level 2 rocket?
• What does static margin refer to in rocket stability?
• Which factors influence the nose cone shape for stability?
• Which adhesive should not be used on rubber (or elastic) shock cord components?
• In no case shall the minimum launch site dimension be less than __________ the estimated altitude of the high power rocket or __________.
• How does a recovery streamer differ from a parachute in Level 2 designs?
• Which of the following individuals has the ultimate responsibility to ensure that the rocket was built in a safe manner?
• After a failure, why is it beneficial to consult a mentor before attempting future flights?
• A payload section with heavy payload separated from the model immediately after motor burnout. What might be the cause?
• Petroleum based lubricants should not be used with the oxygen or nitrous oxide systems used in hybrids. Why?
• What role does a nose cone shape play in stability and drag?
• Which of the following safety hazards may be associated with hybrid rocket motors?
• Parachute ejection systems that sense barometric pressure can malfunction during supersonic flight because:
• How can you adjust static margin without redesigning the airframe?
• 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?
• What is the maximum allowable weight for a high power rocket permitted per NFPA 1127?
• On a farm where the house is in the middle of the farm, which is occupied, what is the minimum distance from the house to the high power launch pad?
• What is the purpose of a launch lug or rail buttons?
• What is the maximum propellant weight allowable for a rocket which does not require an FAA waiver?
• What is the function of the avionics bay in high-power rockets?
• What is the maximum launch weight allowable for a rocket when complying with FAR 101 regulations for now waiver required?
• Parachute ejection systems that sense barometric pressure for activation need a vent to the outside in their compartment because:
• Under NFPA guidelines, which location is permissible for an indoor Type 4 magazine?
• Which two methods are used to estimate the rocket's center of pressure?
• Which adhesive is most likely to be weakened under humid or wet weather conditions?
• Which of the following is a correct interpretation of the 320 N-s motor minimum distance requirement cited in the guidelines?
• According to NAR studies, the vast majority of unsuccessful flights fail because of:
• What is the purpose of insulation of wiring in an avionics bay?
• Total impulse is the product of average thrust and burn time. Which expression correctly represents this relationship?
• Which equipment is required at launch sites?
• What is the static margin in rocketry?
• When should igniters installed in rocket motors be checked for continuity?
• If a motor's total impulse is 1280 N·s, which impulse class does it belong to?
• Which of the following individuals has the final authority in permitting a high power rocket to fly?
• How can you determine an appropriate static margin for a given rocket?
• According to the NFPA, in which location can a Type 4 magazine be permitted, assuming the authority having jurisdiction and the BATF approve?
• Why should composite motors be ignited first in a mixed cluster?
• The Barrowman method is used to estimate which parameter?
• During a flight readiness check, which item is typically verified to ensure safe operation?
• Which statement best describes a practical deployment method used in high-power rockets?
• Why is it essential to perform post-flight inspection?
• Which of the following is true about the ejection system in Level 2 rockets?
• In a dual deployment system, what is the effect of deploying a small parachute at apogee?
• In range safety, the decision by the range safety officer (RSO) is final and cannot be overturned by anybody. Which option best reflects this rule?
• Which of the following is a required attribute for high power certification?
• What combination of parachute ejection timing is most likely to cause zipper damage in a rocket?
• Under which conditions can launch organizers operate in violation of the NAR Safety Code?
• If the ejection charge is insufficient, which outcome is most likely?
• For stable flight, where should the center of gravity be in relation to the center of pressure?
• When individual igniters are used for igniting a clustered model's motors, which statement is typically true?
• What is the purpose of an antigravity or pressure-safe vent in avionics?
• In the kinetic energy formula used for rockets, which term represents velocity's contribution?
• Under standard safety procedures, which statement best describes the inhibition of firing circuits and onboard energetics?
• How does fin size and placement influence the center of pressure (CP)?
• What is (are) the advantages of using a relay type launch control?
• What part of the Federal Aviation Regulations governs rocket activity?
• What is the function of a delay element in a deployment charge?
• What are typical materials used for Level 2 airframes?
• As a rule of thumb, how far should the center of pressure be from the center of gravity?
• In addition to the initial inhibition, when else must firing circuits be inhibited?
• Why is a safe ejection charge important in Level 2 rockets?
• Which practice best reduces the risk of accidental ignition during ground handling?
• Which action is commonly used to improve static stability of a rocket?
• Which motor in the given examples is NOT a High Power Rocket motor?
• Which is not a required feature of a rocket motor ignition system?
• Which impulse class corresponds to a total impulse of 320 Newton-seconds?
• If the payload shoulder is loose in the body tube, what outcome is most likely?
• What is the recommended action if a high-power rocket lands in a power line?
• Which statement is true about purchasing an L motor reloadable casing at a launch by a certified individual?
• What is the purpose of a preflight range safety check?
• Which statement best describes the metrics tracked in Level 2 flights besides altitude?
• The range safety officer says that your model is unsafe to fly. Who has the authority to overturn this ruling?
• What is the primary goal of NAR Level 2 certification?
• What is the purpose of a dual deployment system in a Level 2 rocket?
• When should a flight readiness beacon indicate readiness?