PLTW Unit One Test

Front

In a simple gear train with idler, which of the following statements is true? The driven gear is also referred to as the output. The middle gear is also referred to as the driving gear. The driving gear is also referred to as the output. The output gear is where the movement starts.

Back

The driven gear is also referred to as the output.

Front

Refer to the simple gear train set up below. The outer gears rotate in the ____________ direction of the middle gear.

Back

opposite

Front

Will the code execute as intended to drive a motor forward for 2 seconds, stop for 1 second, drive in the opposite direction for 4 seconds, and stop?

Back

Yes, the code will execute as intended.

Front

Which of the following will help the entire group stay on track?
1. The three group members agree that they do not need to write any comments for their code.
2. Jamal and Prashad discuss some new ideas for their code but do not write them down.
3. Bailey works on the code by herself and finishes it the way she wants it done.
4. The three group members agree to create a flow chart so that all group members understand the plan and can work on the code.

Back

The three group members agree to create a flow chart so that all group members understand the plan and can work on the code.

Front

Which of the following is an example of a scenario where a robot will move autonomously? Options: A coding software program is used to create code and is downloaded to the robot, so that the robot moves based on the code. A coding software program is used to create code, and a person pushes the robot with their hands so that it moves faster. A coding software program is used to create code but is not downloaded to the robot. A person uses a handheld device to drive the robot, no coding software is used.

Back

A coding software program is used to create code and is downloaded to the robot, so that the robot moves based on the code.

Front

Which of the following must be true of the algorithm for Sophia and Jin's robot shuffle that lasts more than 20 seconds, goes both forward and backwards, and begins when BumperA is pressed? Options: The event handler block must include “When Brain left button is pressed”. The “wait time” of all the actions must add up to 15 seconds. The event handler must include a loop. The event handler block must include “When BumperA is pressed”.

Back

The event handler block must include “When BumperA is pressed”.

Front

What is the difference between a repeat loop and a forever loop?

Back

A repeat loop repeats for a designated number of times, whereas a forever loop repeats until the program stops running.

Front

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?

Back

The driving gear needs to be larger than the driven gear.

Front

Describe the gear train that will meet the requirements for a drone propeller to spin at a speed of at least 400 rpm, given a motor that spins at 200 rpm and the following materials: Gears in a variety of sizes.

Back

There are 36 teeth on the input gear and 18 teeth on the output gear.

Front

Your teacher says this is ok because you have failed forward. What do they mean?

Back

By learning what does not work with your design, you have learned how to improve on your next attempt.