Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 470 · 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.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) a gear (c) an input (d) an output
2. 2.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 10. Which sensor is over the black line? (a) the left sensor (b) neither sensor (c) the right sensor (d) both sensors
3. 3.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
4. 4.🔍 What does a gyro sensor measure? (a) colour (b) sound (c) temperature (d) turning (rotation)
5. 5.📡 A distance sensor sends a sound pulse and hears the echo 7 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
6. 6.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times faster (b) 3 times slower (c) 3 times bigger (d) 3 times louder
7. 7.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
8. 8.True or false: “soft snow” suits tracks. (a) False (b) True
9. 9.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 616 cm?
10. 10.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
11. 11.Which of these suits wheels? (a) flying over a field (b) deep mud (c) loose sand dunes (d) a flat road
12. 12.🧭 A robot should turn right 90°, but its gyro shows it turned 80°. How many degrees must it turn more to the right?
13. 13.🔦 A light sensor reads 10 over black and 70 over white. A good threshold is halfway between them. What is it?
14. 14.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
15. 15.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs forward. What does the robot do? (a) spins right on the spot (b) stays still (c) spins left on the spot (d) turns left
16. 16.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 25 and the right sensor reads 70. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
17. 17.True or false: “holds a set angle” is true of a DC motor. (a) False (b) True
18. 18.True or false: “has a signal wire” is true of a servo motor. (a) True (b) False
19. 19.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
20. 20.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
21. 21.📡 An object is 187 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
22. 22.🧭 A robot spins 90° every second. How many seconds does it take to turn 360°?
23. 23.Which of these suits wheels? (a) flying over a field (b) moving under water (c) crossing stepping-stones (d) a long factory floor
24. 24.🧭 How many degrees is a right-angle turn? (a) 360° (b) 45° (c) 90° (d) 180°
25. 25.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 180° (c) 360° (d) 45°
26. 26.True or false: “loose sand dunes” suits propellers. (a) True (b) False
27. 27.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
28. 28.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
29. 29.⚙️ An 8-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
30. 30.Which of these suits legs? (a) flying over a field (b) deep mud (c) stepping over wide gaps (d) a long factory floor
31. 31.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
32. 32.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
33. 33.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 19. What is under the sensor? (a) the white floor (b) the black line
34. 34.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
35. 35.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 35. What is under the sensor? (a) the black line (b) the white floor
36. 36.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
37. 37.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they spread the weight (c) they spin in the air (d) they are round
38. 38.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
39. 39.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 90 and the right sensor reads 95. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) neither sensor (d) both sensors

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