Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 210 · 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: “crossing stepping-stones”? (a) wheels (b) propellers (c) tracks (d) legs
2. 2.⚙️ 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
3. 3.True or false: to know a button is pressed, use a touch sensor. (a) True (b) False
4. 4.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
5. 5.🧭 What does a gyro help a robot do? (a) see colours (b) smell smoke (c) turn by exact angles (d) hear claps
6. 6.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) tyres (c) pins (d) teeth
7. 7.🔍 Which sensor helps a robot measure a turn angle? (a) a camera (b) a temperature sensor (c) a distance sensor (d) a gyro sensor
8. 8.True or false: to read a QR code, use a distance sensor. (a) False (b) True
9. 9.📡 A robot is 140 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 3 seconds (in cm)?
10. 10.True or false: “a long factory floor” suits propellers. (a) False (b) True
11. 11.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
12. 12.📡 Why do we halve the echo’s total path? (a) sound is slow (b) the sensor is half (c) it goes there and back (d) to make it smaller
13. 13.🦾 A servo moves from 30° to 110°. How many degrees does it turn?
14. 14.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor is stopped. What does the robot do? (a) turns left (b) goes straight back (c) goes straight forward (d) stays still
15. 15.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
16. 16.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
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 0°. It turns left 120°, then right 120°. What does the gyro read now (0° to 359°)?
18. 18.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 34 cm (b) 340 cm (c) 1 km (d) 3 cm
19. 19.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
20. 20.🧭 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 270°. It turns left 180°, then right 135°, then left 30°. What does the gyro read now (0° to 359°)?
21. 21.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spread the weight (b) they spin in the air (c) they are shiny (d) they are round
22. 22.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor runs backward. What does the robot do? (a) stays still (b) goes straight forward (c) spins right on the spot (d) goes straight back
23. 23.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
24. 24.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
25. 25.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. The driven gear turns 8 times. How many times did the driver turn?
26. 26.🔍 Which sensor helps a robot warn if motors get hot? (a) a distance sensor (b) a temperature sensor (c) a camera (d) a touch sensor
27. 27.True or false: to stay balanced upright, use a distance sensor. (a) True (b) False
28. 28.🧭 A robot spins 30° every second. How many seconds does it take to turn 180°?
29. 29.🔦 A light sensor reads 40 over black and 70 over white. A good threshold is halfway between them. What is it?
30. 30.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
31. 31.⚙️ A 60-tooth driver gear turns a 12-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
32. 32.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 30 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
33. 33.Which of these suits wheels? (a) soft snow (b) flying over a field (c) hovering over a roof (d) a long factory floor
34. 34.Which of these suits propellers? (a) loose sand dunes (b) a flat road (c) a hospital corridor (d) hovering over a roof
35. 35.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) an output (c) an input (d) a gear
36. 36.🛞 Which way of moving suits this best: “moving under water”? (a) legs (b) wheels (c) tracks (d) propellers
37. 37.⚙️ A 60-tooth driver gear turns a 12-tooth driven gear. The driver turns 8 times. How many times does the driven gear turn?
38. 38.🔦 A light sensor reads 10 over black and 60 over white. A good threshold is halfway between them. What is it?
39. 39.True or false: “reverses if wires swap” is true of a servo motor. (a) False (b) True
40. 40.🧭 A robot faces north. It does: turn right, turn left, turn right. Which way does it face now? (a) south (b) east (c) west (d) north

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