Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 360 · 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 way of moving suits this best: “a long factory floor”? (a) legs (b) wheels (c) propellers (d) tracks
2. 2.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 1800° (c) 10° (d) 180°
3. 3.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 47. What is under the sensor? (a) the white floor (b) the black line
4. 4.🧭 A robot faces north. It does: turn around, turn right. Which way does it face now? (a) west (b) south (c) north (d) east
5. 5.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
6. 6.🛞 The diameter of a wheel is how many times its radius? (a) 4 (b) 3 (c) 1 (d) 2
7. 7.🦾 A servo moves from 110° to 10°. How many degrees does it turn?
8. 8.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a DC motor (d) a light sensor
9. 9.True or false: to follow a black line, use a light sensor. (a) True (b) False
10. 10.🧭 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 90°, then left 30°, then right 120°. What does the gyro read now (0° to 359°)?
11. 11.Which job needs a temperature sensor? (a) know a button is pressed (b) read a QR code (c) stay balanced upright (d) warn if motors get hot
12. 12.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times faster (b) 3 times louder (c) 3 times bigger (d) 3 times slower
13. 13.⚙️ A 10-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
14. 14.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
15. 15.🛞 Which way of moving suits this best: “soft snow”? (a) legs (b) tracks (c) propellers (d) wheels
16. 16.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 5 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
17. 17.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
18. 18.🛞 Why do most indoor robots use wheels? (a) fast and easy on floors (b) they float (c) they climb stairs (d) they look funny
19. 19.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
20. 20.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
21. 21.🧭 A robot faces south. It does: turn around, turn around. Which way does it face now? (a) north (b) east (c) south (d) west
22. 22.🛞 How does a two-wheeled robot with no steering turn? (a) one wheel runs faster (b) it stops for ever (c) it uses a sail (d) it jumps
23. 23.🧭 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 0°. It turns right 30°, then left 135°. What does the gyro read now (0° to 359°)?
24. 24.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
25. 25.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) spokes (d) teeth
26. 26.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
27. 27.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
28. 28.⬛ The threshold of a light sensor is … (a) the black/white cut-off (b) the top speed (c) the battery size (d) the wheel size
29. 29.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points up and right (b) points left (c) points right (d) points straight up
30. 30.🧭 A robot faces south. It does: turn left, turn left. Which way does it face now? (a) south (b) west (c) north (d) east
31. 31.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
32. 32.🔍 For a robot’s controller, is a sensor an input or an output? (a) an output (b) a gear (c) an input (d) a wheel
33. 33.📡 A robot is 220 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 14 seconds (in cm)?
34. 34.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 34 cm (b) 3 cm (c) 340 cm (d) 1 km
35. 35.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) big (slow and strong) (b) small (fast, weak) (c) zero (d) never important
36. 36.🛞 Which way of moving suits this best: “flying over a field”? (a) tracks (b) legs (c) wheels (d) propellers
37. 37.🧭 What does a gyro help a robot do? (a) hear claps (b) turn by exact angles (c) see colours (d) smell smoke
38. 38.⚙️ An 8-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
39. 39.🧭 A robot should turn right 90°, but its gyro shows it turned 99°. How many degrees must it turn back to the left?
40. 40.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?

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