NAR HPR Level 2 Certification Practice Exam: Section C - Range and Safety Practices

There will be (20) questions on the actual exam from Section C's (54) question pool. For each question below, click on the circle next to the correct answer. When you have finished the test, Click the 'Score My Exam' button at the bottom of the page. Good luck!

 

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 C2
What is the maximum wind velocity allowable for launch operations?

A. 20 miles per hour
B. 25 miles per hour
C. 15 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. 100 feet
B. 320 feet
C. 750 feet
D. The launcher may be located anywhere on the launch site to compensate for wind

 

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

 

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. 1800 feet
B. 4500 feet
C. 9000 feet
D. 18,000 feet

 

Question C6
The FAA has granted a waiver for high power rocket flight to 2500 feet for your 2xN cluster-powered rocket. What are the minimum launch site dimensions?

A. 500 feet
B. 1250 feet
C. 1500 feet
D. 4000 feet

 

Question C7
In no case shall the minimum launch site dimension be less than __________ the estimated altitude of the high power rocket or __________.

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

 

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. 750 feet
B. 1500 feet
C. 3000 feet
D. You cannot launch unless the house is empty

 

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. Yes
B. Yes, but the pads have to be the minimum personnel distance from the edge of the field
C. Yes, but the house has to be empty
D. No

 

Question C11
What is the minimum safe distance from a high power rocket containing a single “I“ motor?

A. 200 feet
B. 100 feet
C. 75 feet
D. 50 feet

 

Question C12
What is the minimum safe distance from a high power rocket containing three (3) “H“ motors?

A. 200 feet
B. 100 feet
C. 75 feet
D. 50 feet

 

Question C13
What is the minimum safe distance from a high power rocket containing two (2) “K“ motors?

A. 50 feet
B. 100 feet
C. 300 feet
D. 500 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 C15
In the event of a misfire how long should you wait before approaching the launch pad?

A. 15 seconds
B. 60 seconds
C. 5 minutes
D. As soon as signs of smoke are gone

 

Question C16
Which of the following is most likely to cause catastrophic failure of a black powder rocket motor?

A. Temperature cycling
B. Electromagnetic fields
C. Vibration
D. High altitude

 

Question C17
Unless the motor manufacturer instructs otherwise, igniters for clustered rocket motors should be wired together in:

A. Series
B. Parallel
C. Short Circuit
D. Open

 

Question C18
When should igniters installed in rocket motors be checked for continuity?

A. Any time
B. Only in an enclosed shelter
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 C19
Which of the following is the preferred method for attaching fins to a high power rocket?

A. Tube surface mounting
B. “Wedge“ mount
C. “Though the wall“ mounting
D. All fin mounting methods are all equally strong; it does not matter

 

Question C20
Which of the following adhesives should not be used on rubber (or elastic) shock cord components?

A. Slow-curing epoxy adhesives
B. Cyanoacrylate glues (super glue)
C. Aliphatic resin-based (yellow) glues
D. White “Elmer’s“ glue

 

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. Aliphatic resin based glues
D. White “Elmer’s“ glue

 

Question C22
Which of the following adhesives is the best choice for motor mount construction using phenolic motor tubes?

A. Slow-curing epoxy adhesives
B. Cyanoacrylate glues (super glue)
C. Aliphatic resin based glues
D. “Hot melt“ adhesives

 

Question C23
The centering rings provided with your high power kit are a loose fit around the phenolic motor tube. Which of the following adhesives is the best choice for a strong joint?

A. Slow-curing epoxy adhesives
B. Cyanoacrylate glues (super glue)
C. Aliphatic resin based glues
D. “Hot melt“ 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. This hole allows excessive ejection charge pressures to vent to reduce shock cord stress
B. The hole is used to give air pressure readings for on board altimeters
C. The hole vents internal air pressure as the rocket gains altitude to prevent internal air pressure from 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. Composite rocket motors should be ignited first
B. Black powder rocket motors should be ignited first
C. It does not matter which motors are ignited first
D. Clusters should never mix composite and black powder motors

 

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. Composite motors are more likely to “cato“ than black powder motors
C. The exhaust products from black powder motors prevent composite motor ignition
D. Composite rocket motors are more powerful 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 have an audible as well as visual indication of igniter continuity
B. The launch control must provide additional current to ignite the additional igniters
C. The launch control must provide higher voltage to ignite the additional igniters
D. The launch control must use a car battery as a power source

 

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. They thicken when exposed to oxygen or nitrous oxide
B. They lose their lubricating properties when exposed to oxygen or nitrous oxide
C. There is a risk of spontaneous ignition or explosion
D. The lubricant can promote corrosion of the metal components in the presence 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. Low temperatures (frostbite)
C. Corrosive materials
D. High pressure gas

 

Question C31
The range safety officer says that your model is unsafe to fly. Who has the authority to overturn this ruling:

A. The Launch Control Officer (LCO)
B. The individual who “checked-in“ the model
C. Three certified high power fliers who agree the model is safe
D. The safety monitor’s (RSO) decision cannot be overturned by anybody

 

Question C32
Parachute ejection systems that sense barometric pressure for activation need a vent to the outside in their compartment because:

A. This hole allows excessive ejection charge pressures to vent
B. The hole is used to give outside air pressure readings
C. The hole vents internal air pressure as the rocket gains altitude to prevent internal air pressure from prematurely separating the model
D. The hole allows easy verification that the battery is installed

 

Question C33
Which of the following individuals has the final authority in permitting a high power rocket to fly?

A. The launch control officer (LCO)
B. The range safety officer (RSO)
C. The check-in officer
D. The rocket owner

 

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 C35
Parachute ejection systems that sense barometric pressure can malfunction during supersonic flight because:

A. Aerodynamic heating changes the values of electronic components
B. The outside pressure distribution is not continuous around the model
C. Static discharges will “zap“ sensitive electronic components
D. Both answers “A“ and “B“ are correct

 

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 C37
Your payload section, with heavy payload, separated from your model immediately after motor burnout. What might be the cause?

A. The center of pressure at burnout was behind the center of gravity for the model
B. The payload shoulder was too loose in the body tube
C. The rocket motor had a failure of its delay system
D. Both “B“ and “C“ are correct

 

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

 

Question C40
What is the distance around a launcher to-clear all burnable materials away for a rocket using a single J motor that burns a titanium sponge to emit sparks?

A. 30 feet
B. 50 feet
C. 75 feet
D. 150 feet

 

Question C41
What is “titanium sponge?“

A. A substitute for ejection wadding
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 lightweight material used in nose cones on supersonic rockets

 

Question C42
Consequences of inadequate motor retention can include:

A. The motor being ejected at apogee instead of the parachute, resulting in two falling objects
B. The motor being ejected from a cluster, and flying on its own, under power
C. The motor flying through the rocket, destroying it
D. All of the above

 

Question C43
According to NAR studies, the vast majority of unsuccessful flights fail because of:

A. Rocket designs that are unstable
B. Rocket motor malfunctions
C. Recovery system failures
D. Rockets that are structurally unsound

 

Question C44
The kinetic energy of a descending rocket is a function of:

A. Its mass
B. Its velocity
C. Its mass times its velocity
D. Its mass times the square of its velocity

 

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 C46
Your rocket has an altimeter for deployment, and you’ve installed a switch to interrupt the current path from the altimeter to the ejection charges. When may you turn on the altimeter?

A. When the rocket is at the pad or at an RSO-designated area
B. To demonstrate the altimeter to the RSO at check-in
C. To check continuity after loading the charges in the prep area
D. At apogee

 

Question C47
What equipment is required at launch sites?

A. Fire Suppression devices such as fire extinguishers
B. First aid kits
C. Fire suppression devices and First aid kits
D. Fire suppression devices, First aid kits, and a way of communicating with everyone on the launch site

 

Question C48
You have an unproven design for a high power rocket. Which of the following is NOT an acceptable means to ensure that it is safe to fly?

A. Fly it as a “heads up“ flight on the first flight
B. Fly a smaller (non-HPR) scale model
C. Perform a swing test
D. Use a simulation program

 

Question C49
Your high-power rocket lands in a power line. Which of the following is true?

A. You can retrieve it if the power line is on a wooden (not metal) pole
B. You must leave it alone and you must call the power company
C. You can retrieve it if you have a non-conductive tool, such as a “hot-stick“
D. You can retrieve it if part of it is already on the ground

 

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 are limited only by the HPR maximum wind of 20 miles per hour
B. You can fly at 15 mph, if you have the pads at the upwind edge of the field and tilt into the wind
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 and the rocket flies vertically
D. This field can only be used in calm winds for flights to the waiver altitude

 

Question C51
When can launch organizers operate in violation of the NAR Safety Code?

A. The property owner consents
B. The local authorities give written permission
C. Local laws are followed and two thirds of the NAR Board of Trustees give written permission for a project that offers commensurate levels of safety
D. Never

 

Question C52
Which of the following is not a required feature of a rocket motor ignition system?

A. A removable interlock device is in series with the launch switch
B. The system is electrically operated
C. The launching switch will return to the “off“ position when released
D. An audible or visual indicator shows continuity through the rocket motor igniter

 

Question C53
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 C54
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. 25 feet
C. 50 feet
D. 75 feet

 


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