Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 66 · 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.Which of these suits propellers? (a) a hospital corridor (b) soft snow (c) a smooth classroom floor (d) hovering over a roof
2. 2.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) slower (b) faster (c) nowhere (d) backwards
3. 3.🧭 A robot keeps turning right by 60° at a time. How many turns make one full circle?
4. 4.⬛ A reading below the threshold means the sensor is over … (a) the sky (b) black (c) white (d) water
5. 5.🛞 The diameter of a wheel is how many times its radius? (a) 1 (b) 2 (c) 4 (d) 3
6. 6.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
7. 7.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 25. What is under the sensor? (a) the black line (b) the white floor
8. 8.True or false: to stop before a wall, use a distance sensor. (a) False (b) True
9. 9.📡 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?
10. 10.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
11. 11.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) tracks (b) wheels (c) propellers (d) legs
12. 12.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
13. 13.⬛ The threshold of a light sensor is … (a) the black/white cut-off (b) the wheel size (c) the battery size (d) the top speed
14. 14.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
15. 15.Which of these suits wheels? (a) a smooth classroom floor (b) moving under water (c) hovering over a roof (d) stepping over wide gaps
16. 16.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) smell smoke (c) see colours (d) hear claps
17. 17.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 95. Which sensor is over the black line? (a) the left sensor (b) the right sensor (c) both sensors (d) neither sensor
18. 18.⚙️ A 10-tooth driver gear turns a 20-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
19. 19.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a camera (b) a touch sensor (c) a gyro sensor (d) a sound sensor
20. 20.🛞 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 forward. What does the robot do? (a) goes straight back (b) turns left (c) goes straight forward (d) turns right
21. 21.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driver turns 45 times. How many times does the driven gear turn?
22. 22.🔍 Which sensor helps a robot read a QR code? (a) a gyro sensor (b) a distance sensor (c) a camera (d) a sound sensor
23. 23.🛞 How does a two-wheeled robot with no steering turn? (a) it uses a sail (b) it jumps (c) one wheel runs faster (d) it stops for ever
24. 24.Which job needs a distance sensor? (a) measure how far a box is (b) feel a bump into a wall (c) warn if motors get hot (d) follow a black line
25. 25.⚙️ A 15-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
26. 26.🧭 A robot faces south. It does: turn around, turn right, turn around, turn right. Which way does it face now? (a) south (b) north (c) west (d) east
27. 27.🧭 A robot faces south. It does: turn right, turn right, turn right, turn left. Which way does it face now? (a) west (b) north (c) east (d) south
28. 28.📡 A robot is 140 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 3 seconds (in cm)?
29. 29.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
30. 30.Which job needs a camera? (a) read a QR code (b) warn if motors get hot (c) follow a black line (d) find the brightest spot
31. 31.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
32. 32.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
33. 33.🧭 A robot faces south. It does: turn around, turn left, turn left. Which way does it face now? (a) west (b) north (c) south (d) east
34. 34.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
35. 35.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
36. 36.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
37. 37.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
38. 38.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
39. 39.🧭 A robot should turn right 90°, but its gyro shows it turned 88°. How many degrees must it turn more to the right?
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 90. Which sensor is over the black line? (a) both sensors (b) the left sensor (c) neither sensor (d) the right sensor

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