Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 229 · 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 way of moving suits this best: “a flat road”? (a) wheels (b) propellers (c) legs (d) tracks
2. 2.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
3. 3.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
4. 4.🧭 What does a gyro help a robot do? (a) smell smoke (b) see colours (c) turn by exact angles (d) hear claps
5. 5.📡 A robot is 110 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 2 seconds (in cm)?
6. 6.🧭 A robot faces north. It does: turn around, turn left, turn around, turn around. Which way does it face now? (a) east (b) west (c) south (d) north
7. 7.Which job needs a light sensor? (a) find the brightest spot (b) measure a turn angle (c) measure how far a box is (d) warn if motors get hot
8. 8.Which job needs a temperature sensor? (a) read a QR code (b) warn if motors get hot (c) find the brightest spot (d) follow a black line
9. 9.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
10. 10.🧭 A robot faces east. It does: turn left, turn left. Which way does it face now? (a) east (b) west (c) north (d) south
11. 11.🛞 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 forward (c) goes straight back (d) stays still
12. 12.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
13. 13.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) tracks (b) wheels (c) propellers (d) legs
14. 14.Which of these suits wheels? (a) a long factory floor (b) deep mud (c) hovering over a roof (d) crossing stepping-stones
15. 15.🧭 A robot spins 45° every second. How many seconds does it take to turn 135°?
16. 16.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
17. 17.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
18. 18.🧭 A robot should turn right 180°, but its gyro shows it turned 172°. How many degrees must it turn more to the right?
19. 19.🔦 A light sensor reads 30 over black and 60 over white. A good threshold is halfway between them. What is it?
20. 20.True or false: “holds a set angle” is true of a servo motor. (a) True (b) False
21. 21.True or false: to stop before a wall, use a distance sensor. (a) False (b) True
22. 22.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) faster (b) nowhere (c) backwards (d) slower
23. 23.Which of these suits propellers? (a) stepping over wide gaps (b) a hospital corridor (c) a smooth classroom floor (d) flying over a field
24. 24.🔍 Which sensor helps a robot measure how far a box is? (a) a temperature sensor (b) a distance sensor (c) a sound sensor (d) a light sensor
25. 25.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
26. 26.⬛ Why does a light sensor read a LOW number over a black line? (a) black is loud (b) black soaks up light (c) black is hot (d) black is wet
27. 27.⚙️ A 20-tooth driver gear turns a 10-tooth driven gear. The driver turns 1 time. How many times does the driven gear turn?
28. 28.🧭 A robot spins 90° every second. How many seconds does it take to turn 270°?
29. 29.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
30. 30.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 30 turns a minute and the right wheel at 30 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
31. 31.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spread the weight (b) they are round (c) they spin in the air (d) they are shiny
32. 32.🔦 A light sensor reads 40 over black and 80 over white. A good threshold is halfway between them. What is it?
33. 33.⚙️ 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
34. 34.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
35. 35.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 180° (c) 10° (d) 1800°
36. 36.🧭 A robot keeps turning right by 72° at a time. How many turns make one full circle?
37. 37.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 4 times (in cm)?
38. 38.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 1 km (b) 34 cm (c) 340 cm (d) 3 cm
39. 39.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
40. 40.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how many full turns must they make to roll 330 cm?

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