Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 813 · 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: “has just two wires” is true of a servo motor. (a) False (b) True
2. 2.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
3. 3.🛞 Circumference = π × … (a) weight (b) speed (c) diameter (d) radius only
4. 4.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
5. 5.Which of these suits tracks? (a) loose sand dunes (b) flying over a field (c) crossing stepping-stones (d) a flat road
6. 6.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 3 times. How far does the robot roll (in cm)?
7. 7.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) wheels (b) propellers (c) tracks (d) legs
8. 8.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 180° (c) 360° (d) 45°
9. 9.🧭 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 180°. It turns right 180°, then left 45°, then left 120°. What does the gyro read now (0° to 359°)?
10. 10.🔦 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) the left sensor (b) the right sensor (c) both sensors (d) neither sensor
11. 11.🔍 Which sensor helps a robot read a QR code? (a) a touch sensor (b) a temperature sensor (c) a gyro sensor (d) a camera
12. 12.🧭 How many degrees is a right-angle turn? (a) 360° (b) 90° (c) 180° (d) 45°
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 25 and the right sensor reads 30. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the right sensor (d) the left sensor
14. 14.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
15. 15.🔦 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) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
16. 16.🛞 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 right on the spot (b) goes straight back (c) turns left (d) turns right
17. 17.⚙️ A 16-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
18. 18.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
19. 19.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
20. 20.🔦 A light sensor reads 40 over black and 60 over white. A good threshold is halfway between them. What is it?
21. 21.⚙️ A motor makes 180 turns a minute with a 12-tooth gear on it. That gear drives a 36-tooth gear. How many turns a minute does the 36-tooth gear make?
22. 22.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
23. 23.Which job needs a temperature sensor? (a) stay balanced upright (b) find the brightest spot (c) measure a turn angle (d) warn if motors get hot
24. 24.🛞 Why do most indoor robots use wheels? (a) fast and easy on floors (b) they float (c) they climb stairs (d) they look funny
25. 25.Which of these suits wheels? (a) flying over a field (b) a long factory floor (c) soft snow (d) stepping over wide gaps
26. 26.Which job needs a camera? (a) follow a black line (b) find the brightest spot (c) read a QR code (d) feel a bump into a wall
27. 27.⚙️ A 10-tooth driver gear turns a 40-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
28. 28.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 85. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) the right sensor (d) both sensors
29. 29.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
30. 30.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) tyre (d) driver gear
31. 31.🧭 A robot spins 15° every second. How many seconds does it take to turn 270°?
32. 32.⚙️ A motor makes 220 turns a minute with a 20-tooth gear on it. That gear drives a 40-tooth gear. How many turns a minute does the 40-tooth gear make?
33. 33.⬛ The threshold of a light sensor is … (a) the top speed (b) the battery size (c) the wheel size (d) the black/white cut-off
34. 34.⬛ Why does a light sensor read a LOW number over a black line? (a) black is hot (b) black is loud (c) black is wet (d) black soaks up light
35. 35.🔍 Which sensor helps a robot stay balanced upright? (a) a light sensor (b) a touch sensor (c) a gyro sensor (d) a distance sensor
36. 36.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
37. 37.⚙️ A 20-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
38. 38.🔍 Why do robots need sensors? (a) to be heavier (b) to look colourful (c) to know their world (d) to use more power
39. 39.🧭 A robot should turn right 45°, but its gyro shows it turned 49°. How many degrees must it turn back to the left?
40. 40.🦾 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 up and right (b) points up and left (c) points right (d) points left

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