Quiz about VEXcode VR Unit 8

Question 1

What creates the magnetic field for the Electromagnet?

Accepted Answer

An electric current.

Answer

An electrical outlet.

Answer

A button on the VR Robot.

Answer

An additional magnet.

Question 2

What objects can the Electromagnet pick up in VEXcode VR?

Accepted Answer

Disks

Answer

Buildings

Answer

Balls

Answer

Pen drawings

Question 3

What is one use of the Electromagnet in VEXcode VR?

Accepted Answer

To pick up and put down disks with metal cores.

Answer

To identify the color of disks.

Answer

To solve the Wall Maze.

Answer

To find metal in the walls of Playgrounds.

Question 4

What is the best description of the [Energize Electromagnet] block?

Accepted Answer

Sets the VR Robot Electromagnet to two different modes: Boost or Drop.

Answer

Sets the Electromagnet to two different modes: Pick Up or Put Down.

Answer

Energizes the Electromagnet to press both Bumper Sensors.

Answer

Energizes the Electromagnet to attract all metal objects in a Playground.

Question 5

What happens when the [Energize Electromagnet] is set to boost while near a disk?

Accepted Answer

The Electromagnet attracts the disk.

Answer

The Electromagnet drops the disk.

Answer

The Dashboard reports the disk being picked up.

Answer

Nothing happens.

Question 6

What happens when the [Energize Electromagnet] is set to drop while the Electromagnet sensor is holding a disk?

Accepted Answer

The Electromagnet releases the disk.

Answer

Nothing happens.

Answer

The Dashboard reports the disk being released.

Answer

The Electromagnet picks up the disk.

Question 7

True or False: The [Energize Electromagnet] block is a reporter block that can be used with Drivetrain blocks to pick up disks.

Accepted Answer

False

Answer

True

Question 8

Describe what the VR Robot will do in this project.

Accepted Answer

The VR Robot will energize the magnet, drive forward 800 millimeters (mm), turn left 180 degrees, drive forward 800 millimeters (mm) and drop any disks that were picked up.

Answer

The VR Robot will drive forward 800 millimeters (mm), turn left 180 degrees, drive forward 800 millimeters (mm) and drop any disks that were picked up.

Answer

The VR Robot will energize the magnet, drive forward 800 millimeters (mm), turn left 180 degrees, and drive forward 800 millimeters (mm).

Answer

The VR Robot will energize the magnet, drive forward 200 millimeters (mm), turn left 90 degrees, drive forward 200 millimeters (mm) and drop any disks that were picked up.

Question 9

In this project, what will happen if the Down Eye Sensor does NOT detect an object?

Accepted Answer

The VR Robot will drive forward.

Answer

The VR Robot will check the condition of the again.

Answer

The VR Robot will stop driving.

Answer

The VR Robot will stop driving, then set the Electromagnet to 'boost'.

Question 10

Which VR Robot sensor determines the color of an object when close enough?

Accepted Answer

Eye Sensor.

Answer

Gyro Sensor.

Answer

Distance Sensor.

Answer

Location Sensor.

Question 11

Which sensor does the VR Robot use with the [Turn to heading] block?

Accepted Answer

Gyro Sensor.

Answer

Distance Sensor.

Answer

Location Sensor.

Answer

Bumper Sensor.

Question 12

Which direction will the VR Robot turn when using the [Turn to heading] block?

Accepted Answer

The VR Robot will determine which direction to turn based on the current heading of the Gyro sensor. The VR Robot will turn in the direction with the smaller degree difference between the current and given heading.

Answer

The VR Robot will determine which direction to turn based on the current heading of the Distance sensor.

Answer

The VR Robot will always turn counter-clockwise.

Answer

The VR Robot will always turn clockwise.

Question 13

Which of the following describes one reason to use a [Turn to heading] block versus a [Turn] or [Turn for] block?

Accepted Answer

[Turn to heading] makes projects repeatable from one run to another because the VR Robot will move to the specified heading regardless of the previous position of the VR Robot.

Answer

[Turn to heading] will orient the VR Robot to the starting position in any Playground.

Answer

[Turn to heading] makes projects unique and difficult to repeat from one run to another because the VR Robot will move to the specified heading regardless of the previous position of the VR Robot.

Answer

[Turn to heading] is based on the readings from the Distance Sensor, so it is more accurate than other turn commands.

Question 14

How do you nest loops in a VEXcode VR project using blocks from the Tool Box?

Accepted Answer

Drag the loop you want to nest inside of another existing loop in the workspace.

Answer

Add the loop you want to nest underneath a loop in the workspace.

Answer

Add the loop you want to nest on top of an existing loop in the workspace.

Answer

Right-click or long-press on the block to activate the Context Menu and then select Nest Block.

Question 15

Which of the following best describes the project flow in this VEXcode VR project?

Accepted Answer

The VR Robot will begin by moving forward 300 millimeters (mm) and will turn right 90 degrees. These two commands will be executed two times in a row because of the [Repeat] loop. The VR Robot will then turn to a heading of 0 degrees. The VR Robot will repeat all these steps two additional times for a total of three repeats.

Answer

The VR Robot will begin by moving forward 300 millimeters (mm) and will turn right 90 degrees. The VR Robot will then turn to a heading of 0 degrees. The VR Robot will repeat all these steps two additional times for a total of three repeats.

Answer

The VR Robot will begin by moving forward 300 millimeters (mm) and will turn right 90 degrees. The VR Robot will then turn to a heading of 0 degrees. The VR Robot will repeat all these steps one additional time for a total of two repeats.

Answer

The VR Robot will begin by moving forward 300 millimeters (mm) and will turn right 90 degrees. These two commands will be executed two times in a row because of the [Repeat] loop. The VR Robot will then turn to a heading of 0 degrees.

Question 16

What is one reason to use nested loops?

Accepted Answer

To repeat certain actions more than others within the outer repeat loop.

Answer

To sense the distance between the VR Robot and an object.

Answer

To determine if there is a red object on the Playground.

Answer

To turn the VR Robot to a specific heading based on the Gyro Sensor.

Question 17

This project should solve the Disk Mover challenge, but it does not work correctly. What is the error?

Accepted Answer

The outer loop is set to repeat two times rather than three.

Answer

The inner loop is set to repeat three times rather than two.

Answer

The Electromagnet is never instructed to pick up a disk.

Answer

The Electromagnet is never instructed to drop a disk.

VEXcode VR Unit 8

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