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VEX Robotics 1 Final review Flashcards | StudBud
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VEX Robotics 1 Final review
VEX Robotics 1 Final review
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Questions
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1
If you are missing a component from your kit, you should __________.
"Borrow" it from another group.
Report it to the teacher
Make due with what you have
Make note of it in your engineering notebook
2
Acceleration is defined as the change in
All of the above
Acceleration
Velocity
Speed
3
If the BaseBot travels 16 meters in 2 seconds, what is the average speed?
7.5 m/s
8 m/s
30 m/s2
30 m/s
4
How many joysticks control the robot's drive train in Tank control?
Three
Two
One
None, it uses the buttons on the transmitter
5
A motor works because of thousands of wire loops called:
armatures
poles
magnets
windings
6
Moving the right joystick up in the vertical direction while in Arcade control ___________.
moves the left side of the robot backward and the right side forward
does not move the robot, this channel is only used in Tank control
moves the left side of the robot forward and the right side backward
moves both the left and right side of the robot forward.
7
In the torque equation, "F" stands for ...
Force applied
Force of tension
Force of impulse
Force of torque
8
CW is an abbreviation for:
clock wait
clockwise
constant wave
charge wait
9
An autonomous robot ____________.
use an internal program and use sensor for feedback.
is controlled by remote control
is any robot that strongly resembles an automobile
has wheels
10
A PWM value of 0 will cause a Motor Module to:
Turn full speed CCW.
Stop moving
Turn full speed CW.
Turn on.
11
Compared to the kinetic coefficient of friction, the static coefficient of friction is
smaller
greater
the same
zero
12
Friction is a force that:
is bad thing in Robotics class
Is on surface
Is used on sandpaper
Opposes motion
13
What is the equation for calculating torque?
T = force+distance
T = force*distance
T = force–distance
T = force/distance
14
What is the difference between closed and open loop circuits?
Closed loop does not have feedback
Open loop does not have feedback, closed loop does
none are correct
Open loop has feedback
15
How many joysticks control the robot's drive train in Tank control?
two
zero
can't tell
one
16
Which force would create a larger torque?
Force B
Force A
17
Which type of gears does the Vex robotics kit contain?
spur
bevel
rack and pinion
helical
18
What is the "chassis" of a robot?
The body or base of a robot
The butt of a robot
The motor on a robot
The brain of a robot
19
The ___ code allows you to configure and operate the Vex robot without programming the robot.
basic
custom
default
generic
20
The coefficient of friction, μ, is
Ff/Fnet
Fnet/m
Ff * Fn
Ff/Fn
21
Force x Distance = Work Done
True
False
22
_________ are used to protect your eyes.
Mr. Hartman's fingers
Safety Glasses
Sun glasses
Presciption glasses
23
How many degrees of freedom are there?
6
4
2
3
24
A sensor that sends a signal to the whole robot when pressed. Usually causing motors to stop or reverse
Rubber band
Bump swtich
vex battery charger
Line Follower
25
Formula of Newtons secon law of motion F=ma is an equation.
True
No it is a formula
False
Formula and equation means same.
26
Define Newtons third law
For every action there is an equal and opposite reaction
For every reaction there is an equal action
*Insert bob ross music*
Marley made me type the Kahoot :(
27
Which of the following is not a step of the engineering design cycle?
Testing and optimization
Iteration
Analysis
Prototype
28
A robot has wheels with a 3 cm radius spinning at 100 RPM. How fastcan it go?
0.1 cm/s
11.3 cm/s
34.5 cm/s
31.5 cm/s
29
What is NOT a step of the Engineering Design Cycle?
Patent the idea
Test
Define the problem
Specify requirements
30
Which of the following is NOT an example of the drive train?
Plow
Axle
Tank Treads
Wheels
31
A 3/4-20 x 1.50" screw has how many threads per inch?
20
.75
can't tell from this info
1.5
32
A Vex motor is:
A device that uses gasoline to power the robot
A device that is an input to the VEX controller
A device that converts mechanical energy to electrical energy
A device that converts electrical energy to mechanical energy
33
Which gear ratio has the most torque?
2:1
1:1
1:2
4:1
34
What gear ratio is this?
12:3
what
1:2
3:5
35
When should a sensor be sampled:
Before installation and testing
When ever the robot starts oscillating or overhooting
Immediately before the program needs to make a decision
After the robot turns on the motors
36
Sensors provide ______ to a program via the controller.
program code
feedback
error messages
lights
37
The Mars Rover needed to have autonomous driving functions because:
The distance to Mars was too great..
Operators of the robot can't see where they want it to go.
Rover moves too fast for human control.
Rover used sensors to identify its objectives & go to them.
38
An engineering notebook needs to be
Clear and detailed
Missing pages
Stained with pizza
Hard to read
39
A structure system beam used to form the "skeleton" of the robot.
chassis rail
c-channel
cortex
plate structure
40
Which of the following statements is true of the line-following sensor?
Uses an LED and a photo detector to see the line.
Uses ambient light with a detector to see the line.
Returns on/off (digital) value to indicate on/off the line.
Is always plugged into motor port three (3).
41
A __________ is a device used to connect the transmitter directly to the Vex controller.
tether
antenna
receiver module
PWM cable
42
What is an engineering notebook?
A notebook that contains all details about your project.
A notebook used to keep pasta recipes.
A device to replicate virtual reality.
A spiral notebook.
43
Velocity can be defined as:
the same as speed.
distance traveled divided by the time it took.
how fast something is changing speeds.
displacement traveled divided by the time it took.
44
When should a sensor be sampled:
Immediately before the program needs to make a decision
Before installation and testing
When ever the robot starts oscillating or overhooting
After the robot turns on the motors
45
Friction is a force that always acts____.
in the same direction that the object is moving
perpendicular to the objects motion
opposed to the object’s motion
downwards against the surface
46
What are the units for torque?
Newton Meters (Nm)
Meters (M)
Newton Seconds (Ns)
Newtons (N)
47
What is the unit for force?
Pascals (Pa)
Metres (M)
Newtons (N)
Kilograms (Kg)
48
What are the units on the coefficient of friction?
None
Mu
Joules
Newtons
49
Sensors provide information to the robot concerning:
obstacles around the robot.
the robot's location.
All choices are correct
the robot’s environment
50
The Ultrasonic Sensor...
Uses reflected sound waves to measure distance.
Needs Bluetooth to run.
Uses a GPS to move around.
Needs the wire to run.
51
newtons first law
Heavier objects need a larger force to move them.
For every action there is an equal and opposite reaction.
An object won't change its motion unless acted upon by a force.
52
The __________ is the brain of the robot.
operator
Machines don't have brains
controller
joysick
53
An autonomous robot is one that:
Requires a human operator to carry out its tasks.
Has mechanisms to perform a variety of operations.
Uses its own program to handle different situations.
Is able to respond to joystick commands.
54
Speed of sound is 1000m/sec and echo takes 2500ms to ping to the reception, what is distance?
2500 meters
1250 meters
500 meters
2500 meters
55
A 2 lb force acting on a 2 inch wheel will produce a torque of:
64 oz in
32 oz in
4 lb in
Impossible to tell
56
VEX metal structural components...
All of the above.
form a machine or robot base.
contain square holes on a standardized 1/2" grid.
attach using 8-32 screws and nuts.
57
Positive torque will produce a
static rotation
not enough information
clockwise rotation
counterclockwise rotation
