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Robotics 2 updated solution
How is electrical current created? - answer ✅✅All of the above What is electrical current? - answer ✅✅The migration of electrons from atom to atom through materials. Match the quantity with its unit of measure. - answer ✅✅Resistance = Ohms Voltage = Volts Current = Amperes What is a circuit? - answer ✅✅The path through which current flows in order to do work. On a breadboard, the terminal strips in the component connection area are connected... - answer ✅✅In columns Schematic and pictorial diagrams of circuits are.. - answer ✅✅often used simultaneously Which of the following is not a type of switch? - answer ✅✅Zener What are resistors NOT used for in circuits? - answer ✅✅Increase the power supply If resistance is added to a circuit, what effect does it have on the capacitor in that circuit? - answer ✅✅Increases its discharge time What does a diode do? - answer ✅✅Allows current to flow in one direction only
For what purpose are capacitors used? - answer ✅✅All of the above When measuring current, the meter is not connected in-circuit. True or False? - answer ✅✅False Ohm's law is expressed as... - answer ✅✅I=E/R Continuity testing is commonly used to... - answer ✅✅all of the above When measuring resistance in-circuit, the other devices in the circuit do not influence the reading. True or False? - answer ✅✅False Resistance is equal to the voltage divided by the current. True or False? - answer ✅✅True In parallel circuits, the total capacitance is equal to the sum of the individual capacitors. True or False? - answer ✅✅True In a parallel circuit, the same voltage is applied to each device, but the current may be different. True or False? - answer ✅✅True The current is the same through all devices in a series circuit, but the voltage is divided according to the resistance of each device. True or False? - answer ✅✅True A series circuit has more than one path through which the current travels. True or False? - answer ✅✅False How do you calculate resistance in a series circuit? - answer ✅✅Add the individual resistance values. What are the advantages of using series circuits? - answer ✅✅All of the above. How do you calculate resistance in a parallel circuit? - answer ✅✅Rt = 1/(1/R1+1/R2+1/R3+...)
Which is the correct order for these programming steps? - answer ✅✅Write the pseudocode, choose and declare your variables, write the program, and download it to the controller. What type of sensor provides feedback in the form of an ON or OFF electrical signal? - answer ✅✅A digital sensor. What two steps do you need to perform before you can use the controls in the On- Line Window? - answer ✅✅Verify Communications between your PC's COM port and the Vex Controller. AND. Download the On-Line code to your controller. How do you reset the hardware to run a program repeatedly? - answer ✅✅Turn the controller off and back on. What type of variable is the best choice for a single bit value? - answer ✅✅char What would you use in your program to make it check the value of a sensor over and over again? - answer ✅✅A "while" loop. UNIT 8 >>>>>> - answer ✅✅Unit 8 my guy To protect yourself while working with robots, you should: - answer ✅✅1. Avoid wearing loose fitting clothes, remove dangling jewelry, and keep hair tied back.
- Beware of pinch points.
- Wear proper footwear. What should you do first if your partner becomes entangled in the robot? - answer ✅✅Turn the robot off. Keps nuts must contact the metal frame to work correctly and should not be tightened onto plastic bearings. True or False? - answer ✅✅True ____________ should be worn at all times while working with the vex kit components.
Spacer should be used: - answer ✅✅1. in place of lock collars if possible to make assembly and disassembly easier.
- to prevent gears from sliding on the shaft and getting out of alignment. Use a __________ to produce a slower output speed. - answer ✅✅small to large gear combination Why would you choose a belt over a chain? - answer ✅✅Belts produce smoother, quieter operation. For high torque applications, chain and sprockets are more reliable than belts. True or False? - answer ✅✅True Match the components of a chain with their function. - answer ✅✅Act as axles for the rollers and as rivets between the link plates.Answer Pins. Maintain the spacing between the rollers and give chain its strength.Answer 2 Link plates. Is used to add a half link of length to the chain.Answer 3 Offset link. Connects two ends of a chain together.Answer 4 Master link. What can you do to tighten a chain? - answer ✅✅1. Remove links.
- Add a chain tensioner. Chain and sprockets can span larger distances than gears. The resulting advantage is: - answer ✅✅All of the above. A 6 wheel drive robot design may be chosen over a 4 wheel drive design to increase the robot's traction. True or False? - answer ✅✅True What is a holonomic drive train? - answer ✅✅A drive train that can move in any direction while simultaneously controlling rotational speed in that direction. What is the greatest challenge to designing a walking robot - answer ✅✅Maintaining balance.
Which of the following will the C programming language ignore? - answer ✅✅All of the above. In any function, you should declare the variables after they are used in a statement. True or False? - answer ✅✅False Before you can use a function in your program, you need to - answer ✅✅Declare it The Preprocessor Directive tells the compiler to include a particular file in with your code. True or False? - answer ✅✅True How is a Switch statement different from other conditional statements? - answer ✅✅It contains only the name of a variable. The Vex controller sets all inputs and interrupts to "1" until the condition is read. True or False? - answer ✅✅True What are Switch and Case function blocks used for? - answer ✅✅1. To easily create a software based state machine.
- A neater way of creating a series of conditional statements. Inserting a Break block after any code in a Case statement will cause the program to leave the Switch statement. True or False? - answer ✅✅True Competition templates start moving the robot as soon as the robot's controller is turned on. True or False? - answer ✅✅False If statements can be used to create a program to choose between two autonomous modes by looking for a jumper in digital output 6. True or False? - answer ✅✅False What are the sections of a competition template in easyC PRO? - answer ✅✅1. Autonomous
- Initialize
- Initialize
UNIT 9 >>>>>>> - answer ✅✅Unit 9 my guy The Error calculation in a proportional controller is... - answer ✅✅Always the difference between the current value and the target value A properly configured P system is best described as: - answer ✅✅Critically Damped Proportional Control is only effective in one direction of a robot's motion, typically forward. True or False? - answer ✅✅False In a system with a kp value which is far too low, which result would be most likely: - answer ✅✅The system will be unresponsive. The yellow regions on the graph represent: - answer ✅✅The saturation region. Saturation can be a problem because... - answer ✅✅Output values can exceed the range accepted by the Vex Motors Which of the following has the greatest impact on derivative control: - answer ✅✅The rate of change of Error. When might you use an easyC Timer? - answer ✅✅When a wait statement would prevent a loop from properly executing. Select the true statement from the following: - answer ✅✅Two variables are responsible for derivative behavior; kd and the time interval. What is the derivative at the identified point in the graph? - answer ✅✅ 0 The main concern of integral windup is: - answer ✅✅iError becoming too large and overwhelming P and D.
Which is the correct order of the following wild rabbit behaviors in order of priority: - answer ✅✅Run from predators, Eat , Sleep , Reproduce The three elements of a behavior based program are: - answer ✅✅Sensing, Arbitration and Actuation A behavior based program with simple behaviors is limited to simple interactions with its environment. True or False? - answer ✅✅False A carnival features "Calvin" - an animatronic head. Calvin spends most of his time 'sleeping' with his eyes closed. When someone approaches or is near, a proximity sensors detects the movement and his eyes open (he is awake). If Calvin can not answer questions while his eyes are closed, the 'sleeping' behavior has a ___________ priority than scanning for movement. - answer ✅✅lower It is good practice to make each behavior its own "if" statement. True or False? - answer ✅✅True A carnival features "Calvin" - an animatronic head. When someone asks Calvin something his programming does not recognize, he uses the standard response "I'm sorry, I don't understand the question". Calvin always finishes a response before listening for another question. This behavior is typical of: - answer ✅✅A ballistic behavior. A carnival features "Calvin" - an animatronic head. Calvin spends most of his time 'sleeping' with his eyes closed. When someone approaches, a proximity sensors detects the movement and his eyes open. At this point, Calvin can respond to questions. When the person leaves, his eyes close again. This behavior is: - answer ✅✅A servo behavior. Of the following, which will yield a random number with the fewest requirements?
- answer ✅✅Polling a timer whenever a bump switch is hit, if the program has a loop time of 7 ms. Which of the following situations yields a 'truly' random result? - answer ✅✅Measuring the decay of a radioactive element.
Some uses for random numbers in programming might include all of the following except: - answer ✅✅Defining array structures 15 % 3 equals: - answer ✅✅ 0 UNIT 10 >>>>> - answer ✅✅Unit 10 my guy Starting at the knuckle, how many degrees of freedom does a pointer finger have? - answer ✅✅ 4 An accurate robot is always precise. True or False? - answer ✅✅False Robots are used in place of humans when a task is: - answer ✅✅All of the above. Match the terms below - answer ✅✅Swaying = Moving left an right. Heaving = Moving up and down. Yawing = Turning left and right. Pitching = Tilting up and down. Inverse kinematics is calculating the ________. - answer ✅✅Angles when the position is known. During a typical homing process, a robot will: - answer ✅✅move until a switch is pressed, move until a switch is not pressed, note its location Hard limits are: - answer ✅✅a failsafe A potentiometer loses all data when it loses power. True or false? - answer ✅✅False What prevents a hobby servo from turning too far? - answer ✅✅the hard stop
A part that is taken out of a machine is known as a raw material. True or False? - answer ✅✅False Parts on a template are always raw materials. True or False? - answer ✅✅False Pallets are removed from the conveyor together with the templates on them. True or False? - answer ✅✅False In the template shown, where is the gripping location? - answer ✅✅A The template with a part can arrive at any station in the CIM cell. True or False? - answer ✅✅True UNIT 11 >>>>>>>> - answer ✅✅Unit 11 my guy Which of the following lift types can retract the lowest? - answer ✅✅Scissor lift Why would you choose an arm design instead of a lift design? - answer ✅✅Design must be able to flip the robot back on to its wheels in case it got tipped over. If each stage of a multiple stage lift rises one at a time, it must have _______ rigging. - answer ✅✅continuous A flag pole is an example of a ________. - answer ✅✅single stage lift Which of the following lift designs consist of linkages? - answer ✅✅1. Scissor lift
- Four bar lift Helical gears tend to be quieter than spur gears but less efficient because of ________. - answer ✅✅tooth length
Transmissions are designed to ______. - answer ✅✅permit vehicles to change gear ratios in the drive train Which of the following formulas will give you the efficiency of a mechanism? - answer ✅✅All of the above Which of the following is not found in the power train of an automobile? - answer ✅✅The distributor. Which of the following drive trains cannot produce a 90 degree offset in operating angle? - answer ✅✅A drive train using spur gears. Which of the following would not be found on a conveyor? - answer ✅✅Linear slides. Conveyors are useful because they ________. - answer ✅✅move a lot of objects quickly Which of the following is not an example of a roller? - answer ✅✅Lawn Mower. A roller system moves material by _______. - answer ✅✅sweeping objects into the robot La Fine - answer ✅✅The End
