Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 893 · 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.True or false: to follow a black line, use a light sensor. (a) False (b) True
2. 2.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 20. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor
3. 3.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
4. 4.🔍 Which sensor helps a robot measure how far a box is? (a) a distance sensor (b) a touch sensor (c) a gyro sensor (d) a camera
5. 5.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 52. What is under the sensor? (a) the white floor (b) the black line
6. 6.⚙️ A motor makes 180 turns a minute with an 8-tooth gear on it. That gear drives a 16-tooth gear. How many turns a minute does the 16-tooth gear make?
7. 7.📡 A distance sensor sends a sound pulse and hears the echo 6 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
8. 8.⚙️ A 15-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
9. 9.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 75. What is under the sensor? (a) the black line (b) the white floor
10. 10.🧭 A robot faces east. It does: turn right, turn right, turn around. Which way does it face now? (a) north (b) west (c) east (d) south
11. 11.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
12. 12.🧭 A robot spins 30° every second. How many seconds does it take to turn 30°?
13. 13.⚙️ A 10-tooth driver gear turns a 20-tooth driven gear. The driver turns 14 times. How many times does the driven gear turn?
14. 14.🔍 Which sensor helps a robot hear a whistle? (a) a gyro sensor (b) a distance sensor (c) a touch sensor (d) a sound sensor
15. 15.🔍 Which sensor helps a robot stop before a wall? (a) a temperature sensor (b) a touch sensor (c) a distance sensor (d) a camera
16. 16.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 4 times. How far does the robot roll (in cm)?
17. 17.🔍 Which sensor helps a robot find the brightest spot? (a) a distance sensor (b) a light sensor (c) a gyro sensor (d) a sound sensor
18. 18.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
19. 19.🔦 A light sensor reads 40 over black and 80 over white. A good threshold is halfway between them. What is it?
20. 20.🧭 How many degrees is a full turn? (a) 360° (b) 100° (c) 90° (d) 180°
21. 21.⚙️ A motor makes 270 turns a minute with an 8-tooth gear on it. That gear drives a 24-tooth gear. How many turns a minute does the 24-tooth gear make?
22. 22.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 7. What is under the sensor? (a) the white floor (b) the black line
23. 23.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
24. 24.Which of these suits legs? (a) crossing stepping-stones (b) hovering over a roof (c) a flat road (d) loose sand dunes
25. 25.🔍 Why do robots need sensors? (a) to use more power (b) to look colourful (c) to know their world (d) to be heavier
26. 26.🔍 For a robot’s controller, is a sensor an input or an output? (a) an input (b) an output (c) a gear (d) a wheel
27. 27.🧭 A robot should turn right 90°, but its gyro shows it turned 92°. How many degrees must it turn back to the left?
28. 28.🔍 Which sensor helps a robot measure a turn angle? (a) a camera (b) a temperature sensor (c) a gyro sensor (d) a sound sensor
29. 29.🧭 A robot faces north. It does: turn right, turn right, turn right. Which way does it face now? (a) south (b) west (c) north (d) east
30. 30.🧭 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 right 60°, then left 90°. What does the gyro read now (0° to 359°)?
31. 31.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 34 cm (b) 1 km (c) 340 cm (d) 3 cm
32. 32.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
33. 33.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
34. 34.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 35. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
35. 35.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 25 and the right sensor reads 95. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
36. 36.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor runs backward. What does the robot do? (a) spins left on the spot (b) stays still (c) goes straight forward (d) spins right on the spot
37. 37.📡 A robot is 170 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 1 second (in cm)?
38. 38.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
39. 39.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
40. 40.🛞 Which way of moving suits this best: “deep mud”? (a) tracks (b) legs (c) propellers (d) wheels

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