Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 652 · 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.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 22 (b) 22/7 (c) 7/22 (d) 2/7
2. 2.🧭 How many degrees is a right-angle turn? (a) 360° (b) 90° (c) 180° (d) 45°
3. 3.🧭 How many degrees is a half turn (turn around)? (a) 180° (b) 360° (c) 45° (d) 90°
4. 4.Which of these suits wheels? (a) a field of tall boulders (b) crossing stepping-stones (c) deep mud (d) a flat road
5. 5.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 12. What is under the sensor? (a) the black line (b) the white floor
6. 6.True or false: “a muddy building site” suits tracks. (a) False (b) True
7. 7.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) tyres (c) spokes (d) pins
8. 8.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
9. 9.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
10. 10.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how many full turns must they make to roll 924 cm?
11. 11.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
12. 12.True or false: “reverses if wires swap” is true of a servo motor. (a) False (b) True
13. 13.🦾 A servo program runs:
    angle = 40
    angle = angle + 40
    angle = angle − 40
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
14. 14.🧭 A robot spins 15° every second. How many seconds does it take to turn 135°?
15. 15.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 1800° (c) 10° (d) 180°
16. 16.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) True (b) False
17. 17.🧭 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 135°, then left 60°. What does the gyro read now (0° to 359°)?
18. 18.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
19. 19.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
20. 20.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) smell smoke (c) hear claps (d) see colours
21. 21.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
22. 22.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how many full turns must they make to roll 44 cm?
23. 23.⚙️ A 50-tooth driver gear turns a 10-tooth driven gear. The driver turns 1 time. How many times does the driven gear turn?
24. 24.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
25. 25.📡 An object is 323 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
26. 26.🧭 A robot keeps turning right by 72° at a time. How many turns make one full circle?
27. 27.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 20. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) the left sensor (d) neither sensor
28. 28.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 70. What is under the sensor? (a) the white floor (b) the black line
29. 29.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
30. 30.⚙️ A motor makes 60 turns a minute with an 8-tooth gear on it. That gear drives a 16-tooth gear. How many turns a minute does the 16-tooth gear make?
31. 31.🧭 A robot should turn right 45°, but its gyro shows it turned 35°. How many degrees must it turn more to the right?
32. 32.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
33. 33.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 17. What is under the sensor? (a) the black line (b) the white floor
34. 34.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
35. 35.⚙️ A motor makes 30 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?
36. 36.True or false: to find the brightest spot, use a light sensor. (a) True (b) False
37. 37.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
38. 38.🔍 Which sensor helps a robot find the brightest spot? (a) a distance sensor (b) a light sensor (c) a sound sensor (d) a camera
39. 39.⚙️ 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
40. 40.🧭 How many degrees is a full turn? (a) 180° (b) 90° (c) 100° (d) 360°

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