Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 366 · 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 servo program runs:
   angle = 170
   angle = angle − 30
   angle = angle − 30
   angle = angle − 10
   angle = angle − 60
   To what angle (in degrees) does the servo turn in the end?
2. 2.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
3. 3.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
4. 4.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
5. 5.⚙️ A 10-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
6. 6.🔍 What does a gyro sensor measure? (a) colour (b) sound (c) temperature (d) turning (rotation)
7. 7.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
8. 8.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 40. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) both sensors (d) the right sensor
9. 9.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a buzzer (c) a DC motor (d) a servo motor
10. 10.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
11. 11.Which of these suits wheels? (a) deep mud (b) a smooth classroom floor (c) hovering over a roof (d) loose sand dunes
12. 12.🧭 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 left 120°, then right 60°. What does the gyro read now (0° to 359°)?
13. 13.⚙️ A 20-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
14. 14.🧭 A robot should turn right 90°, but its gyro shows it turned 84°. How many degrees must it turn more to the right?
15. 15.⬛ The threshold of a light sensor is … (a) the battery size (b) the wheel size (c) the black/white cut-off (d) the top speed
16. 16.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
17. 17.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
18. 18.🧭 A robot spins 45° every second. How many seconds does it take to turn 45°?
19. 19.True or false: to read a QR code, use a camera. (a) True (b) False
20. 20.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
21. 21.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 594 cm?
22. 22.🛞 Which way of moving suits this best: “flying over a field”? (a) tracks (b) legs (c) propellers (d) wheels
23. 23.🔢 Gear ratio = driven teeth ÷ … (a) wheel size (b) driver teeth (c) motor volts (d) number of gears
24. 24.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
25. 25.🦾 A servo moves from 180° to 60°. How many degrees does it turn?
26. 26.📡 What does an ultrasonic distance sensor send out? (a) bright light (b) water drops (c) radio music (d) sound too high to hear
27. 27.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
28. 28.Which of these suits propellers? (a) loose sand dunes (b) a long factory floor (c) moving under water (d) soft snow
29. 29.🛞 Which way of moving suits this best: “hovering over a roof”? (a) wheels (b) propellers (c) legs (d) tracks
30. 30.Which job needs a sound sensor? (a) read a QR code (b) spot a red ball (c) follow a black line (d) hear a whistle
31. 31.🔍 Which sensor helps a robot hear a whistle? (a) a sound sensor (b) a gyro sensor (c) a touch sensor (d) a distance sensor
32. 32.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driven gear turns 9 times. How many times did the driver turn?
33. 33.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) slower but stronger (c) at the same speed (d) not at all
34. 34.🛞 Which way of moving suits this best: “deep mud”? (a) propellers (b) legs (c) wheels (d) tracks
35. 35.🦾 A servo program runs:
    angle = 180
    angle = angle − 40
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
36. 36.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) turns left (b) goes straight back (c) spins left on the spot (d) goes straight forward
37. 37.🔦 A light sensor reads 20 over black and 60 over white. A good threshold is halfway between them. What is it?
38. 38.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
39. 39.True or false: to find the brightest spot, use a light sensor. (a) False (b) True
40. 40.⬛ Why does a light sensor read a LOW number over a black line? (a) black soaks up light (b) black is hot (c) black is loud (d) black is wet

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids