Font size
WorksheetsRobotics 1 Final Exam Review Part 1
Total questions: 135
Worksheet time: 12hrs 53mins
The term ____________ is defined as, "capable of easily igniting and rapidly burning."
flammable
trench
electrical hazard
A person who is capable of identifying existing and predictable hazards in the surroundings of working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.
Competent person
Qualified person
OSHA inspector
Ground fault protection is defined as _______________.
A safety device that protects against short circuits by cutting off power.
Personal protective equipment that prevents an employee from falling a large distance to the ground.
A protective barrier placed around an opening in the floor to prevent falls from occurring.
Which information of a hazardous substance is NOT required on a Material Safety Data Sheet.
Exposure limits
The date the material expires
The physical and chemical characteristics
Precautions for safe handling and use
An experience modification rate (EMR) is a rate computation to determine surcharge or credit to worker's compensation premium based on a company's previous accident experience.
True
False
An unplanned event or occurrence in which no one was injured and no damage to property occurred, but during which either could have happened is defined as a ___________.
Near-miss
Property damage
Minor injury
Failure to communicate is a key cause of accidents. Signs that communicate caution or tell you about potential hazards or warn against unsafe actions typically use the color ____________.
Yellow
Blue
Green
Red
Procrastination, carelessness, and horseplay are examples of ________________________, and is a cause of accidents.
Poor work habits
Intentional acts
Lack of skill
Failure to communicate
Which of the following are considered "unsafe acts" that cause accidents?
Lifting improperly
Failing to use personal protective equipment (PPE)
Servicing equipment in motion
All of the above
The physical state that is different from the acceptable, normal, or correct condition found on the job site that usually causes an accident is called a/an __________________. (An example is a congested workplace or poor ventilation)
Unsafe Condition
Unsafe Act
Management System Failure
Intentional Act
The Code of Federal Regulations (CFR) Part 1926 covers the OSHA standards for ____________________.
Construction Industry
General Industry
Mining Industry
Under federal law, employees have the right to report unsafe conditions in their work environments to OSHA without the fear of getting fired.
True
False
An OSHA inspectors top priority for inspection types due to workers facing an immediate risk of death or serious physical harm is called ___________________.
Imminent danger inspections
Catastrophe inspections
Monitoring inspections
If an employer/company has been inspected previously and has been issued a citation, the type of inspection OSHA will perform is called a/an _________________.
Follow-up inspection
Programmed inspection
Monitoring inspection
An employer must keep and maintain records for all occupational fatalities, injuries, and illnesses, as well as, employee safety training plans.
True
False
Construction has four leading causes of death, referred to as the four high-hazard areas constituting a total of 82% of all construction deaths. Most deaths occur from ______________ accidents.
Fall
Electrical
Caught in
Struck by
It is important to recognize hazards on the job site. Two tools are often utilized, the Job Safety Analysis (JSA) and the Task Safety Analysis (TSA). The ___________________ is a pre-printed checklist that is created rather than having the employee determine and document each step that a single job entails followed by describing each safety concern for each step.
Job Safety Analysis Form
Task Safety Analysis Form
Risk is a measure of the probability, consequences, and exposure related to an event.
True
False
In the class videos, President Roosevelt was described as creating the first federal laws surrounding labor conditions. Check all that apply. (Hint: choose three)
Occupational Safety and Health Act
Minimum wage
40 Hour work week
Social security
Material hazard communication standards
The measure of risk that is determined by the chance an event will occur is called ______________________.
Probability
Consequences
Exposure
How does an ‘IF’ statement differ from a while loop?
An IF statement is always run once; a WHILE loop is run as long as the condition in the parentheses is true.
A WHILE loop is always run once; An IF Statement is run as long as the condition in the parentheses is true
An IF statement can only be run while the condition is false; the WHILE loop can only be run as long as the condition is false
An IF statement is always longer than a WHILE statement
How is the robot able to determine it is veering off to one side or the other while attempting to move straight?
The left and right encoders are not the same value
A touch sensor on the side of the robot is pressed when the robot runs into a side wall
A light sensor on the front of the robot senses that it is traveling over a black line
It can’t – the programmer has to tell it that it is veering
How can the robot self-correct its forward motion?
Decrease the power to the wheel with the least encoder counts
Increase the power to the wheel with the most encoder counts
Assure that the power to both motors is the same
Decrease the power to the wheels with the most encoder counts
An IF-ELSE statement allows the robot to run two different portions of code at the same time.
False
Trues
An IF-ELSE statement allows the robot to run one portion of code if the IF statement is false and another portion of code if it is true.
True
False
How do you create a multi-line comment in your program?
Type ‘/*’ at the beginning of your comment and ‘*/’ at the end of your comment
Type ‘/*’ at the beginning of your comment
Type ‘//’ at the beginning of your comment
Type ‘//’ at the beginning of your comment and again at the end of your comment
When using a variable, you must specify three things. They are:
Variable Type, Name, and Value
Sensor Type, Name, and Value
Which of these is an Integer?
-1
2.5
1.0
Which of these is a proper variable name?
LineCounter1
Line Counter 1
Line Counter
1LineCounter
Global variables should be created within task main and at the beginning.
True
False
What does it mean to “initialize” a variable?
It is given its initial value to store
It is given a value which may not be changed
Math operators (+, -, *, / ) can be used with assignment statements to perform calculations on the values before storing them.
True
False
All decision making conditions in programming must be formed in a way that where the answer is either a yes/no or true/false statement.
True
False
The following boolean operator compares two statements as "equal to." one another.
==
=
<=
!=
The Sensor Debug Window:
Provides real-time information on the values of all the sensors configured on the robot
Only provides information of all the sensors configured on the robot at the end of the program
Provides real-time information on all the motors and sensors configured on the robot
When using the logical operator '&&' in a conditional statement, which of the following sample comparison would result in the entire statement being true and the program being run?
(condition 1 true && condition 2 true)
(condition 1 False && condition 2 True)
(condition 1 True && condition 2 False)
(condition 1 False && condition 2 False)
When using the logical operator '| |' in a conditional statement, which of the following sample comparison would result in the entire statement being False and then the program would not run.
(condition 1 true && condition 2 true)
(condition 1 False && condition 2 True)
(condition 1 True && condition 2 False)
(condition 1 False && condition 2 False)
Encoder wires must be plugged into:
Any analog port
Any adjacent analog port
Any digital port
Any adjacent digital port
If your robot has wheels that are 5" in diameter, what is the linear distance 720 Encoder counts will travel?
31.4 inches
39.25 inches
15.7 inches
47.1 inches
__________ is a measure of how fast an object is moving, describes a change in position with time, and is a scalar quantity.
Speed
Torque
Velocity
Acceleration
________ is a change in speed over time, and is a vector quantity.
Velocity
Acceleration
Angular Velocity
Force
______ is how fast an object is traveling at a particular instant of time, possibly a very small time interval.
Instantaneous speed
Average velocity
Tangential velocity
Linear velocity
The distance a wheel will roll in one revolution is _________, and is equal to the circumference of the wheel.
Wheel rollout
Wheel slipping
Angular velocity
Which of the following is NOT necessary for estimating the robot's maximum speed.
The formula for average velocity
The maximum speed of the motor
The radius of the wheel
The formula for tangential velocity
Which law of Motion states that the acceleration of an object is directly proportional to the net or total force acting on the object and inversely proportional to the object's mass?
Newton's 1st Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion
_______ is the force due to the gravitational attraction that the Earth exerts on any object.
Weight (Newtons)
Mass (kilograms)
Acceleration due to gravity (9.8 m/s2)
The weight acts through the center of gravity of an object. This is an imaginary point where the weight of the object can be thought of as being concentrated.
True
False
Choose all that is true when defining friction.
The force that opposes an object's motion.
Occurs between two objects along their common surface.
Can either prevent both objects from moving
An increase in friction that occurs across the contact area
The force that prevents an object from moving in response to a push or a pull is defined as __________.
Static friction
Kinetic friction
Traction
_________ is the rotational analogue of force, is directed in a circle, and is described by the magnitude of the force multiplied by the distance it is from the center of rotation.
Torque
Angular Velocity
Free spin
Torque can either increase the angular velocity of a spinning object, or resist the tendency to rotate and decrease the angular velocity of a spinning object.
True
False
_________ for a motor occurs when it is unloaded and there is no gear train present and is when their is (virtually) no load placed on the motor. (Choose two correct answers)
Stall Torque (N-m)
Free Spin (RPM)
Maximum angular velocity
Stall current (Amp)
Current and Voltage are essential to converting electrical energy into mechanical energy by a motor.
True
False
The product of current and voltage is _______.
Electrical Power
Work
Rotational Power
Rotational power refers to the strength of the motor or its ability to turn when loaded. It is the product of __________.
Stall torque and angular velocity
Friction and angular velocity
Stall torque and stall current
Stall torque and free current
Theoretical maximum power is the power that is available from the battery and can be found as the product of the voltage in the battery and the maximum current rating of the battery.
True
False
When using multiple motors on an application that requires more power than one motor can handle, the stall torques, stall currents, and free currents of each motor add together, but the free speed DOES NOT change.
True
False
As the speed of the motor increases, the _____ decreases.
Torque
Velocity
Acceleration
Force
If a motor is spinning at 25 RPM at 6 Volts, what would be the speed if the voltage was increased to 9 Volts?
37.5 RPM
16.6 RPM
75 RPM
50 RPM
The robot travels 4 feet in 3.5 seconds. How much time will it take for the robot to travel 6 feet and 3 inches?
5.47 seconds
7.14 seconds
5.51 seconds
7.2 seconds
A wheel turns 30 times in 24 seconds. Determine the angular velocity in RPM
75 RPM
0.02 RPM
1.25 RPM
12 RPM
What is wheel rollout of a 150mm wheel in centimeters?
47.1 cm
471 cm
235.5 cm
23.6 cm
Convert an angular velocity of 120 RPM in a 120 mm wheel to a linear velocity in cm/s. (use 3.14 for pi)
75.36 cm/s
753.6 cm/s
4521.6 cm/s
18.84 cm/s
Your robot has a mass of 1.75 kg and has four wheels, how much normal force is acting on each wheel?
4.29 N
68.6 N
.44 N
7 N
Your robot has a mass of 3 kg and it is pushing a ball that has a mass of 1.5 kg with an acceleration of 1.5 m/s2. How much force is applied?
6.75 N
3 N
11.25 N
2.25 N
What is the coefficient of static friction if it takes a push of 12 N from the motors to get a 3.0 kg robot moving?
.41
3.67
.27
Two motors act together (each with a torque of 25 N.cm) to turn an 84 tooth gear that has an 88.9 mm diameter. What is the tangential force acting at the teeth of the gear?
11.25N
5.62 N
1.12 N
222.25 N
As seen in the graphs, current and torque load are proportional. Which of the following statement is true.
More torque load means more current draw.
Current and rotational speed are inverse.
The faster the motor spins, the less current it draws.
All of the above
In the example, a known motor at a known voltage is driving a known robot arm. In this scenario, what is the maximum weight the robot can hold stationary? (Hint: To solve this problem, a designer must understand that the maximum weight the robot can hold stationary occurs at the stall torque of the motor.)
4 N
.25 N
40 N
25 N
In the example, and considering the torque load placed on the motor (s), how many VEX 393 motors would it take to hold the object stationary?
4 motors
2 motors
3 motors
1 motor
What is the name of the field dealing with the study of the bodies in motion?
Statics
Classical Mechanics
Physics
Aeronautics
Given P=I * V; a typical alkaline battery has a voltage of 1.5 volts and is capable of supplying .15 Amps of current. What is the power, in watts, that a battery is capable of producing?
.225 watts
.1 watts
10 watts
none of the above
A bumper switch is a _______________ digital sensor.
touch
VEX LED
Line Follower
Potentiometer
To make a VEX 393 Motor work please use a
lock plate bearing
analogue sensor
motor controller
large motor screw
What needs to be at the start and end of all coding (under task main)?
parathesis
stop
two back slashes
curly brackets
Which command means run time?
start
wait
stop
while
Which part do we write code?
1
2
3
4
To end a line of code what symbol is used?
;
:
.
<
Comments in Robot C are what color?
red
green
black
blue
What must you keep in mind while coding?
spaces
capitalization
spelling
Everything, spaces, capitalization, and spelling.
Using the picture, which part is being shown?
limit switch
cortex
battery pack
motor
A robot that operates solely on its sensors, motors, and code is considered to be...
Humaniod
Augmenting
Teleoperated
Autonomous
What coding language is Robot C?
C++
Python
Java
RENE
A line follower is a ____________ sensor.
digital
analog
motor
complicated
A while statement will
create a loop, repeating your code.
allow your motor to run
make your robot wait
only work if 1==2
What does untilTouch code for?
switches
levers
gates
motors
What does a bumper switch do?
It gives the motor a forward movement (increases speed).
It is a button that can start a line of code.
It is a bump your car can travel over.
To reverse the direction of motor movement
You can not reverse motor direction.
Type a negative before speed.
Move the motor arrangement on your robot.
Use the switch on the Motor.
To have your robot run while not connected to the computer you need to download and then
turn off the cortex, undo the USB cord, and turn cortex on.
you can't run a robot without the computer connected.
take out the batteries, then put them back in.
choose the wireless VEXNET option.
What does compile program function do on RobotC?
analyzes your code and fixes your mistakes.
analyzes your code and shows mistakes.
analyzes your code and inserts comments.
analyzes your code and makes you mad.
What symbol is this?
START
oval
begin the flowchart
circle
What shape is this?
START
oval
begin the flowchart
circle
What symbol is this?
Read DataItem
rectangle
slanted box
Input
parallelogram
What shape is this?
Read DataItem
rectangle
slanted box
Input
parallelogram
What symbol is this?
Set Ans = calculation
rectangle
Processing
calculation
What shape is this?
Set Ans = calculation
rectangle
Processing
calculation
What symbol is this?
Question?
Decision
diamond
YES
NO
What shape is this?
Question?
Decision
diamond
YES
NO
What symbol is this?
Print Ans
parallelogram
slanted box
Output
rectangle
What shape is this?
Print Ans
parallelogram
slanted box
Output
rectangle
What symbol is this?
arrow
downward arrow
down
direction
What shape is this?
arrow
downward arrow
down
direction
What symbol is this?
Stop
oval
end of flowchart
circle
What shape is this?
Stop
oval
end of flowchart
circle
This is an example of...
Narrative
Flowchart
IPO Chart
diagram
A robot with 1 rotary joint and 2 linear joints will have a:
cartesian work envelope
cylindrical work envelope
partial spherical work envelope
full spherical work envelope
A robot with 2 rotary joints and 1 linear joint will have a:
cartesian work envelope
cylindrical work envelope
partial spherical work envelope
full spherical work envelope
A robot with 3 linear joints will have a:
cartesian work envelope
cylindrical work envelope
partial spherical work envelope
full spherical work envelope
A robot with 3 rotary joints will have a:
cartesian work envelope
cylindrical work envelope
partial spherical work envelope
full spherical work envelope
Roll, pitch, or yaw?
roll
pitch
yaw
Roll, pitch, or yaw? (the plane in the image is seen from above, and is turning left and right)
roll
pitch
yaw
Roll, pitch, or yaw? (the plane in the image is seen from above, and is turning left and right)
roll
pitch
yaw
Roll, pitch and yaw movement of a robot actuator will require 3 . . .
linear joints
rotary joints
Movement in cartesian space of a robot actuator will require 3 . . .
linear joints
rotary joints
Pick the true statement:
A robot can have 6 degrees of freedom: translational movement in the x, y, and z axes, plus roll, pitch and yaw.
The number of degrees of freedom for each joint of a robot contributes to the overall number of degrees of freedom for the robot.
Mechanisms are used to . . .
change the direction of movement.
change the speed or torque of movement.
change the type of movement.
all of these
Will these gear rotate in the same or opposite directions?
Same direction
Opposite directions
Will the first and last gears in this gear train rotate in the same direction?
Yes
No
Which gear is the INPUT?
Left gear
Right gear
The gear ratio is the relationship between . . .
an input gear and output gear.
speed and torque.
the number of teeth and the diameter of a gear.
none of these
Which gear is the INPUT?
Left gear
Right gear
Which gear is the OUTPUT?
Left gear
Right gear
Which gear is the OUTPUT?
Left gear
Right gear
In this gear train, the output speed _____.
increases.
decreases.
remains constant.
In this gear train, the output speed _____.
increases.
decreases.
remains constant.
In this gear train, the output speed _____.
increases.
decreases.
remains constant.
In this gear train, the output torque _____.
increases.
decreases.
remains constant.
In this gear train, the output torque _____.
increases.
decreases.
remains constant.
In this gear train, the output torque _____.
increases.
decreases.
remains constant.
Speed and torqure are _____ related.
directly
inversely
What is the gear ratio of this gear train?
Left gear = 36 teeth
Right gear = 12 teeth
36 : 12
12 : 36
What is the gear ratio of this gear train?
Left gear = 60 teeth
Right gear = 36 teeth
60 : 36
36 : 60
What is the gear ratio if the input gear has 48 teeth and the output gear has 12 teeth?
48 : 12
12 : 48
What is the gear ratio if the input gear has 10 teeth and the output gear has 50 teeth?
10 : 50
50 : 10
Do extra gears between an input and output gear change the gear ratio?
Yes
No
