Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 204 · 40 questions

Robot tip (Find the topic, use the formula): Find the topic: moving, motors, gears, wheels, sensors, echo, line or gyro. Use the rule: teeth × turns; circumference × turns; 17 cm per ms of echo; below the threshold = black; right adds degrees. Check: put your answer back into the rule.

1. 1.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a gear (b) a servo (c) a track (d) a caster wheel
2. 2.True or false: to hear a whistle, use a temperature sensor. (a) False (b) True
3. 3.🔍 Which sensor helps a robot stop before a wall? (a) a touch sensor (b) a light sensor (c) a camera (d) a distance sensor
4. 4.⚙️ An 80-tooth driver gear turns a 20-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
5. 5.🔍 Which sensor helps a robot warn if motors get hot? (a) a light sensor (b) a temperature sensor (c) a camera (d) a touch sensor
6. 6.🦾 A servo program runs:
   angle = 100
   angle = angle + 10
   angle = angle + 60
   To what angle (in degrees) does the servo turn in the end?
7. 7.📡 A robot is 100 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 4 seconds (in cm)?
8. 8.⬛ A reading below the threshold means the sensor is over … (a) black (b) the sky (c) water (d) white
9. 9.🔦 A light sensor reads 20 over black and 80 over white. A good threshold is halfway between them. What is it?
10. 10.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
11. 11.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor is stopped. What does the robot do? (a) goes straight back (b) turns right (c) stays still (d) spins left on the spot
12. 12.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) tracks (b) propellers (c) legs (d) wheels
13. 13.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
14. 14.📡 A distance sensor sends a sound pulse and hears the echo 12 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
15. 15.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
16. 16.🔍 Which sensor helps a robot measure a turn angle? (a) a touch sensor (b) a camera (c) a distance sensor (d) a gyro sensor
17. 17.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
18. 18.🔍 Which sensor helps a robot read a QR code? (a) a distance sensor (b) a camera (c) a light sensor (d) a temperature sensor
19. 19.🔍 Which sensor helps a robot know a button is pressed? (a) a light sensor (b) a sound sensor (c) a touch sensor (d) a gyro sensor
20. 20.🔍 Why do robots need sensors? (a) to use more power (b) to look colourful (c) to know their world (d) to be heavier
21. 21.True or false: to follow a black line, use a temperature sensor. (a) True (b) False
22. 22.📡 An object is 153 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
23. 23.🛞 What is the main difficulty with legs for a robot? (a) too fast on floors (b) they are too cheap (c) harder to balance (d) they never tire
24. 24.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
25. 25.🦾 A servo program runs:
    angle = 120
    angle = angle + 60
    angle = angle − 50
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
26. 26.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
27. 27.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
28. 28.🔍 Which sensor helps a robot find the brightest spot? (a) a temperature sensor (b) a light sensor (c) a touch sensor (d) a gyro sensor
29. 29.📡 A distance sensor sends a sound pulse and hears the echo 18 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
30. 30.🧭 A robot spins 30° every second. How many seconds does it take to turn 300°?
31. 31.True or false: “loose sand dunes” suits wheels. (a) False (b) True
32. 32.🔍 Which sensor helps a robot start on a hand clap? (a) a temperature sensor (b) a light sensor (c) a sound sensor (d) a distance sensor
33. 33.🧭 A robot’s gyro reads 0° when it faces north and counts up to 359° as it turns right (east is 90°). It starts at 90°. It turns left 120°, then left 90°. What does the gyro read now (0° to 359°)?
34. 34.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
35. 35.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
36. 36.True or false: “stepping over wide gaps” suits tracks. (a) True (b) False
37. 37.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
38. 38.🦾 A servo moves from 40° to 70°. How many degrees does it turn?
39. 39.⚙️ An 8-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
40. 40.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a DC motor (b) a buzzer (c) a servo motor (d) a fan

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids