Working on my Level 2 cert for TRA
Newton’s first law: A body continues in its state of rest or of uniform motion in a straight line unless it is compelled to change that state by forces impressed upon it,
Newton’s second law: The rate of change of momentum is proportional to the force impressed and is in the same direction as that force.
Newton’s third law: To every action there is always an equal and opposite reaction.
That the blast deflector must be strong enough to push the rocket off the launch pad at ignition
That a rocket flies because the rocket motor “pushes” the rocket in a direction opposite of the exhaust jet
That the thrust of a rocket motor is proportional to the air density at the launch site
Thrust, Rocket Diameter and finish
Nose cone shape, thrust and drag
Gravity, thrust and aerodynamic drag
Lift-off weight, propellant weight and motor thrust
Fin size, propellant weight and motor thrust
Motor thrust, weight and aerodynamic drag
The CG must be behind the CP relative to the desired direction of flight
The CG must be forward of the CP relative to the desired direction of flight
The CG must move forward (in the desired direction of flight) during the motor burn
No, the CG should be at least two body diameters behind the CP
No, the CP must be behind the CG for the rocket to be stable
Yes, the CP is one body diameter in front of the CG
The balance point of the rocket without the motor
The total area of the fins, airframe and nose cone divided by two
The point at which aerodynamic lift on a rocket is centered
That the center of gravity should be at least one body diameter in front of the center of pressure
That the center of gravity should be very nearly at the same point as the center of pressure
The rocket should balance near or at the center of gravity
One can install a motor, recovery system and payload and determine the balance point of the rocket as it is ready for flight.
One can balance the rocket with the motor hardware alone because that is the condition of the rocket after motor burnout
It is not necessary to test for the center of gravity when using a heavier motor because it has more thrust
The CG stays the same
The CG shifts forward
The CG shifts aft
Using a heavier motor
Adding weight to the nose
Making the rocket shorter
Add weight to the nose, make the rocket longer, install the number of fins
Add weight to the nose, make the rocket longer, use a smaller (or lighter) motor
Add weight to the nose, make the rocket shorter, use a smaller motor
Make the rocket shorter, use larger fins, increase the number of fins
Make the rocket shorter, use smaller fins, add weight to the nose
Make the rocket shorter, change the number of fins, use a longer launch rod
A dimensionless number that represents the effect of gravity and Mach number of the rocket
A dimensionless number dependent on the rocket configuration, Mach number and angle of attack
The force, in newton’s, exerted on the rocket by the atmosphere
The Cd decreases
The Cd stays the same
The Cd increases
Motor thrust, body diameter, nosecone shape and fin shape
Speed, airframe dimensions, nosecone shape and fin shape
Gravity, airframe dimensions, nosecone shape and fin shape
No effect, a boat tail is only a cosmetic design feature
It incrases the Cd by changing the airflow over the fins
It decreases the Cd by reducing the base drag
Ignition, burnout and peak altitude
Powered flight, un-powered ascent and peak altitude
Powered flight, un-powered ascent and descent
A high initial thrust relative to the ending thrust of the motor
A lower initial thrust relative to the ending thrust
The thrust curve is flat
A general decrease in thrust during the burn
A general increase in thrust during the burn
About the same thrust at ignition as at burnout
Core burning motors always have a neutral
The area of burning propellant remains relatively constant
The core is centered in the propellant grain
To hold all of the parts in place prior to ignition of the rocket motor
To make the motor easier to clean if it is a reloadable motor
To keep the hot gasses of the motor from burning or melting the motor case
Ammonium Perchlorate
Ammonium Nitrate
Ammonium Chlorate
Ammonium Perchlorate
Ammonium Nitrate
Ammonium Chlorate
This hole vents excessive ejection charge pressure, reducing shock cord stress
The hole permits on-board altimeter to obtain air pressure readings
The hole vents internal air pressure as the rocket gains altitude to prevent premature separation
Wait!
Here's an interesting quiz for you.