Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 701 · 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 faces north. It does: turn right, turn left. Which way does it face now? (a) north (b) west (c) south (d) east
2. 2.Which of these suits propellers? (a) a smooth classroom floor (b) loose sand dunes (c) hovering over a roof (d) deep mud
3. 3.📡 A distance sensor sends a sound pulse and hears the echo 1 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
4. 4.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
5. 5.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 60 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
6. 6.⚙️ A motor changes electrical energy into … (a) sound only (b) light (c) movement (d) water
7. 7.Which job needs a sound sensor? (a) follow a black line (b) read a QR code (c) start on a hand clap (d) know a button is pressed
8. 8.True or false: “spins faster with more V” is true of a DC motor. (a) False (b) True
9. 9.🧭 A robot should turn right 45°, but its gyro shows it turned 60°. How many degrees must it turn back to the left?
10. 10.📡 A distance sensor sends a sound pulse and hears the echo 5 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
11. 11.🧭 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 right 135°, then left 30°, then left 30°. What does the gyro read now (0° to 359°)?
12. 12.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
13. 13.📡 A distance sensor sends a sound pulse and hears the echo 16 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
14. 14.True or false: “moving under water” suits propellers. (a) False (b) True
15. 15.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a sound sensor (b) a gyro sensor (c) a camera (d) a touch sensor
16. 16.🧭 A robot faces east. It does: turn around, turn left. Which way does it face now? (a) north (b) west (c) east (d) south
17. 17.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
18. 18.🔍 Which sensor helps a robot warn if motors get hot? (a) a camera (b) a temperature sensor (c) a distance sensor (d) a touch sensor
19. 19.🔦 A light sensor reads 30 over black and 90 over white. A good threshold is halfway between them. What is it?
20. 20.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 18° (c) 1800° (d) 180°
21. 21.True or false: “flying over a field” suits tracks. (a) False (b) True
22. 22.Which job needs a camera? (a) spot a red ball (b) follow a black line (c) measure a turn angle (d) start on a hand clap
23. 23.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
24. 24.⚙️ A 24-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
25. 25.⚙️ 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 small driver gear (b) a big driver gear
26. 26.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
27. 27.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
28. 28.⚙️ A motor makes 300 turns a minute with a 10-tooth gear on it. That gear drives a 30-tooth gear. How many turns a minute does the 30-tooth gear make?
29. 29.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) the same direction (d) in opposite directions
30. 30.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
31. 31.📡 What does an ultrasonic distance sensor send out? (a) bright light (b) sound too high to hear (c) water drops (d) radio music
32. 32.🔍 Which sensor helps a robot feel a bump into a wall? (a) a touch sensor (b) a sound sensor (c) a camera (d) a distance sensor
33. 33.🦾 A servo moves from 10° to 100°. How many degrees does it turn?
34. 34.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
35. 35.🛞 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)?
36. 36.📡 An object is 17 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
37. 37.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
38. 38.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 340 cm (b) 3 cm (c) 1 km (d) 34 cm
39. 39.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
40. 40.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?

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