Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 953 · 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.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) in opposite directions (c) they do not turn (d) one up, one down
2. 2.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 58. What is under the sensor? (a) the black line (b) the white floor
3. 3.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
4. 4.🛞 The diameter of a wheel is how many times its radius? (a) 2 (b) 1 (c) 4 (d) 3
5. 5.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
6. 6.⚙️ A 20-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
7. 7.🧭 A robot spins 60° every second. How many seconds does it take to turn 300°?
8. 8.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
9. 9.True or false: “a long factory floor” suits wheels. (a) False (b) True
10. 10.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spread the weight (b) they are round (c) they are shiny (d) they spin in the air
11. 11.🧭 A robot should turn right 45°, but its gyro shows it turned 38°. How many degrees must it turn more to the right?
12. 12.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 44. What is under the sensor? (a) the white floor (b) the black line
13. 13.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
14. 14.🔍 Which sensor helps a robot read a QR code? (a) a light sensor (b) a sound sensor (c) a gyro sensor (d) a camera
15. 15.True or false: to measure how far a box is, use a distance sensor. (a) True (b) False
16. 16.🔦 A light sensor reads 20 over black and 90 over white. A good threshold is halfway between them. What is it?
17. 17.🔦 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 black line (b) the white floor
18. 18.🔦 A light sensor reads 20 over black and 70 over white. A good threshold is halfway between them. What is it?
19. 19.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) faster and weaker (c) slower but stronger (d) at the same speed
20. 20.Which of these suits propellers? (a) loose sand dunes (b) soft snow (c) a field of tall boulders (d) flying over a field
21. 21.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
22. 22.🛞 Which way of moving suits this best: “a muddy building site”? (a) tracks (b) wheels (c) legs (d) propellers
23. 23.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
24. 24.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points right (b) points up and right (c) points straight up (d) points left
25. 25.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
26. 26.📡 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) Yes (b) No
27. 27.🔍 What does a gyro sensor measure? (a) colour (b) temperature (c) sound (d) turning (rotation)
28. 28.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
29. 29.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
30. 30.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 44. What is under the sensor? (a) the black line (b) the white floor
31. 31.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) hear claps (c) see colours (d) smell smoke
32. 32.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
33. 33.📡 Which object is hardest for an echo sensor to notice? (a) a metal door (b) a soft foam cushion (c) a flat wall (d) a wooden box
34. 34.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
35. 35.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
36. 36.True or false: to feel a bump into a wall, use a distance sensor. (a) True (b) False
37. 37.Which of these suits wheels? (a) soft snow (b) stepping over wide gaps (c) loose sand dunes (d) a smooth classroom floor
38. 38.🔍 Why do robots need sensors? (a) to look colourful (b) to use more power (c) to know their world (d) to be heavier
39. 39.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 60. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) neither sensor (d) both sensors
40. 40.🛞 Which way of moving suits this best: “loose sand dunes”? (a) tracks (b) propellers (c) wheels (d) legs

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