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WorksheetsPLTW AR ASSESSMENT REVIEW
Total questions: 17
Worksheet time: 9mins
Name
Class
Date
1.
1. In a simple gear train with idler, which of the following statements is true?
a)
a. The driven gear is also referred to as the output.
b)
b. The middle gear is also referred to as the driving gear.
c)
c. The driving gear is also referred to as the output.
d)
d. The output gear is where the movement starts.
2.
2. Refer to the simple gear train set up below. The outer gears rotate in the _______________ direction of the middle gear.
a)
a. same
b)
b. opposite
3.
3. Your group wants to program a motor to drive forward for 2 seconds, stop for 1 second and then drive in the opposite direction for 4 seconds and stop. You create the following code. Will this code execute as you intended?
a)
a. No, they should change the first DRIVE block to “reverse”.
b)
b. Yes, this programming code meets all the requirements.
c)
c. No, they should change the first WAIT block to “1” second.
d)
d. Yes, but they should change the last DRIVE block to “2” seconds.
4.
4. What is the difference between a repeat loop and a forever loop?
a)
a. A forever loop repeats steps for a set number of times, whereas a repeat loop repeats steps until the program stops running.
b)
b. A repeat loop is used to copy and paste the same set of code, in order, and a forever loop is used if you want to copy and paste the same set of code in reverse order.
c)
c. A repeat loop repeats for a designated number of times, whereas a forever loop repeats until the program stops running.
d)
d. A forever loop is used to copy and paste the same set of code, in order, and a repeat loop is used if you want to copy and paste the same set of code in reverse order.
5.
5. Drew, Anaya, and Olivia are working together on a gear train. They want the output speed to be faster than the input speed. How should they assemble the gears to achieve this result?
a)
a. The driving gear needs to be larger than the driven gear.
b)
b. The driving gear and driven gear need to be the same size.
c)
c. The output gear needs to be larger than the input gear.
d)
d. The driven gear needs to be larger than the driving gear.
6.
6. When working on a solution to a design problem, it is important to follow the six steps in the design process. Select the answer that shows the steps in the correct order.
a)
a. Define the Problem, Generate Concepts, Design a Solution, Build and Test the Solution, Evaluate the Solution, Present the Solution.
b)
b. Define the Problem, Generate Concepts, Build and Test the Solution, Evaluate the Solution, Design the Solution, Present the Solution.
c)
c. Define the Problem, Build and Test the Solution, Generate Concepts, Design a Solution, Evaluate the Solution, Present the Solution.
d)
d. Define the Problem, Generate Concepts, Evaluate the Solution, Build and Test the Solution, Design a Solution, Present the Solution.
7.
7. After brainstorming concepts, your team comes up with three different design ideas for a solution and needs to decide which one is best. Using the Decision Matrix below, which design option should the group decide to use?
a)
a. Design #1
b)
b. Design #2
c)
c. Design #3
d)
d. A decision cannot be made based on the information provided.
8.
8. Match the block to its description.
a)
a. Executes code continuously.
b)
b. Executes code based on a condition.
c)
c. Executes code based on when the program starts.
d)
d. Executes code based on an event occurring.
9.
9. Match the block to its description.
a)
a. Executes code continuously.
b)
b. Executes code based on a condition.
c)
c. Executes code based on when the program starts.
d)
d. Executes code based on an event occurring.
10.
10. Match the block to its description.
a)
a. Executes code continuously.
b)
b. Executes code based on a condition.
c)
c. Executes code based on when the program starts.
d)
d. Executes code based on an event occurring.
11.
11. When assembling a chain drive, which of the following should be considered for your system to work effectively? Select all that apply.
a)
a. The chain in the system must be of the appropriate length.
b)
b. The input sprocket must turn in the opposite direction of the output sprocket.
c)
c. The teeth on the sprockets must align with spacing of the chain drives so that they mesh together.
d)
d. The sprockets must always rotate in a clockwise direction.
12.
12. Trey, Randal, and Hannah are creating a prototype for an amusement ride. On the ride, carts move riders along a track using a chain drive mechanism, and an animatronic display pops up when a cart is detected by the optical sensor. The group successfully creates the program below for the prototype. The ride is working, but Trey wants the carts to go faster up the hill, and the group agrees to this modification. Which alteration to the code will achieve the goal of making the carts go faster up the hill?
a)
a. Increase the wait time to 5 seconds.
b)
b. Set the ChainMotor velocity to 5%.
c)
c. Spin the ChainMotor forward.
d)
d. Set the ChainMotor velocity to 20%.
13.
13. Complete the definition: A system of parts working together to complete a task is called a _______
a)
a. mechanism
b)
b. gear
c)
c. force
14.
14. In the mechanism pictured below, speed is ______________ (increased or decreased) , and torque is ______________ (increased or decreased),
a)
a. increased, decreased
b)
b. increased, increased
c)
c. decreased, increased
15.
15. When a big gear turns a small gear, the output provides more _________ but less ________ than the input.
a)
a. torque, speed
b)
b. speed, torque
c)
c. force, torque
d)
d. speed, force
16.
16. The gear that moves as a result of the input moving is called _________________.
a)
a. output
b)
b. input
c)
c. speed
d)
d. gears
17.
17. Name the type of movement used as an input.
a)
a. Linear
b)
b. Oscillating
c)
c. Rotary
d)
d. Reciprocating
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