National Association of Rocketry (NAR) Level 2 Practice Exam

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