Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 427 · 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 robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
2. 2.True or false: “a muddy building site” suits tracks. (a) True (b) False
3. 3.⚙️ A motor makes 360 turns a minute with a 15-tooth gear on it. That gear drives a 60-tooth gear. How many turns a minute does the 60-tooth gear make?
4. 4.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 95 and the right sensor reads 80. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
5. 5.📡 A distance sensor sends a sound pulse and hears the echo 13 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
6. 6.True or false: to start on a hand clap, use a temperature sensor. (a) False (b) True
7. 7.⬛ The threshold of a light sensor is … (a) the top speed (b) the battery size (c) the wheel size (d) the black/white cut-off
8. 8.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
9. 9.True or false: “deep mud” suits wheels. (a) True (b) False
10. 10.🛞 How does a two-wheeled robot with no steering turn? (a) it stops for ever (b) one wheel runs faster (c) it uses a sail (d) it jumps
11. 11.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
12. 12.🧭 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 270°. It turns right 60°, then right 180°. What does the gyro read now (0° to 359°)?
13. 13.🛞 Which way of moving suits this best: “loose sand dunes”? (a) legs (b) propellers (c) wheels (d) tracks
14. 14.True or false: “soft snow” suits propellers. (a) True (b) False
15. 15.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
16. 16.True or false: to measure how far a box is, use a sound sensor. (a) True (b) False
17. 17.🧭 How many degrees is a full turn? (a) 90° (b) 360° (c) 100° (d) 180°
18. 18.True or false: to spot a red ball, use a touch sensor. (a) False (b) True
19. 19.⬛ Why does a light sensor read a LOW number over a black line? (a) black soaks up light (b) black is hot (c) black is loud (d) black is wet
20. 20.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
21. 21.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 25 and the right sensor reads 30. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) the left sensor (d) neither sensor
22. 22.📡 A distance sensor sends a sound pulse and hears the echo 5 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
23. 23.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its circumference (c) its radius (d) its weight
24. 24.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
25. 25.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
26. 26.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 74. What is under the sensor? (a) the white floor (b) the black line
27. 27.📡 A distance sensor sends a sound pulse and hears the echo 8 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
28. 28.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
29. 29.True or false: “a long factory floor” suits wheels. (a) True (b) False
30. 30.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 352 cm?
31. 31.⚙️ A 40-tooth driver gear turns an 8-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
32. 32.Which of these suits propellers? (a) moving under water (b) soft snow (c) a smooth classroom floor (d) a long factory floor
33. 33.🛞 Which way of moving suits this best: “moving under water”? (a) propellers (b) tracks (c) legs (d) wheels
34. 34.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
35. 35.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
36. 36.Which job needs a gyro sensor? (a) follow a black line (b) measure how far a box is (c) read a QR code (d) stay balanced upright
37. 37.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
38. 38.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
39. 39.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 70 and the right sensor reads 60. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) both sensors (d) the left sensor
40. 40.📡 An object is 68 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?

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