Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 601 · 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.🛞 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)? =
2. 2.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 14 cm (use π = 22/7). The motor turns 10 times. How far does the robot roll (in cm)?
3. 3.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) in opposite directions (d) the same direction
4. 4.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
5. 5.🦾 A servo program runs:
   angle = 10
   angle = angle + 40
   angle = angle − 50
   angle = angle + 30
   angle = angle + 60
   To what angle (in degrees) does the servo turn in the end?
6. 6.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a sound sensor (b) a camera (c) a touch sensor (d) a gyro sensor
7. 7.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
8. 8.Which of these suits legs? (a) a smooth classroom floor (b) stepping over wide gaps (c) a hospital corridor (d) loose sand dunes
9. 9.🧭 How many degrees is a right-angle turn? (a) 90° (b) 180° (c) 45° (d) 360°
10. 10.True or false: “loose sand dunes” suits tracks. (a) False (b) True
11. 11.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times louder (b) 3 times bigger (c) 3 times faster (d) 3 times slower
12. 12.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
13. 13.True or false: to stop before a wall, use a temperature sensor. (a) False (b) True
14. 14.⬛ Why does a light sensor read a LOW number over a black line? (a) black is hot (b) black is wet (c) black is loud (d) black soaks up light
15. 15.Which of these suits wheels? (a) deep mud (b) a long factory floor (c) a muddy building site (d) a field of tall boulders
16. 16.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
17. 17.True or false: to spot a red ball, use a light sensor. (a) False (b) True
18. 18.🔍 For a robot’s controller, is a sensor an input or an output? (a) a gear (b) an output (c) an input (d) a wheel
19. 19.⚙️ 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
20. 20.🔍 Which sensor helps a robot measure how far a box is? (a) a light sensor (b) a distance sensor (c) a touch sensor (d) a temperature sensor
21. 21.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its weight (c) its radius (d) its circumference
22. 22.🔍 Which sensor helps a robot spot a red ball? (a) a gyro sensor (b) a camera (c) a sound sensor (d) a light sensor
23. 23.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
24. 24.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 and the right sensor reads 40. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor
25. 25.🔍 Which sensor helps a robot know a button is pressed? (a) a distance sensor (b) a temperature sensor (c) a light sensor (d) a touch sensor
26. 26.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 660 cm?
27. 27.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
28. 28.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
29. 29.📡 A robot is 150 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 6 seconds (in cm)?
30. 30.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a buzzer (b) a servo motor (c) a DC motor (d) a fan
31. 31.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
32. 32.🦾 A servo program runs:
    angle = 30
    angle = angle + 40
    angle = angle − 40
    angle = angle + 50
    angle = angle − 10
    To what angle (in degrees) does the servo turn in the end?
33. 33.⚙️ A motor changes electrical energy into … (a) water (b) light (c) sound only (d) movement
34. 34.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
35. 35.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 7 cm (use π = 22/7). The motor turns 12 times. How far does the robot roll (in cm)?
36. 36.True or false: “spins faster with more V” is true of a DC motor. (a) False (b) True
37. 37.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 10° (c) 180° (d) 1800°
38. 38.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
39. 39.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 30 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
40. 40.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 53. What is under the sensor? (a) the white floor (b) the black line

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