Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 12 · 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.🧭 What does a gyro help a robot do? (a) see colours (b) hear claps (c) turn by exact angles (d) smell smoke
2. 2.⚙️ An 8-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
3. 3.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times bigger (b) 3 times faster (c) 3 times slower (d) 3 times louder
4. 4.🔦 A light sensor reads 10 over black and 70 over white. A good threshold is halfway between them. What is it?
5. 5.True or false: to know a button is pressed, use a touch sensor. (a) False (b) True
6. 6.🧭 A robot faces south. It does: turn right, turn left, turn right, turn right. Which way does it face now? (a) west (b) north (c) south (d) east
7. 7.🧭 A robot faces east. It does: turn right, turn left, turn right, turn right. Which way does it face now? (a) north (b) east (c) south (d) west
8. 8.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 30 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
9. 9.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its weight (c) its circumference (d) its radius
10. 10.🛞 Which way of moving suits this best: “loose sand dunes”? (a) propellers (b) wheels (c) tracks (d) legs
11. 11.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) pins (c) tyres (d) teeth
12. 12.⬛ Why does a light sensor read a LOW number over a black line? (a) black is wet (b) black soaks up light (c) black is hot (d) black is loud
13. 13.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
14. 14.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 14 cm (use π = 22/7). The motor turns 18 times. How far does the robot roll (in cm)?
15. 15.📡 A distance sensor sends a sound pulse and hears the echo 3 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
16. 16.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
17. 17.🔦 A light sensor reads 10 over black and 80 over white. A good threshold is halfway between them. What is it?
18. 18.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how far does the robot roll when the wheels turn 8 times (in cm)?
19. 19.🛞 What is the main difficulty with legs for a robot? (a) harder to balance (b) too fast on floors (c) they are too cheap (d) they never tire
20. 20.📡 A robot is 130 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 5 seconds (in cm)?
21. 21.⚙️ A 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
22. 22.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
23. 23.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
24. 24.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
25. 25.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
26. 26.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a sound sensor (b) a touch sensor (c) a camera (d) a gyro sensor
27. 27.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
28. 28.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a gear (b) a track (c) a caster wheel (d) a servo
29. 29.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 10 times (in cm)?
30. 30.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
31. 31.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs backward. What does the robot do? (a) goes straight back (b) goes straight forward (c) turns left (d) turns right
32. 32.⚙️ A 20-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
33. 33.⬛ A reading below the threshold means the sensor is over … (a) black (b) water (c) the sky (d) white
34. 34.🛞 Which way of moving suits this best: “a hospital corridor”? (a) propellers (b) tracks (c) legs (d) wheels
35. 35.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
36. 36.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 6 times. How far does the robot roll (in cm)?
37. 37.⚙️ An 8-tooth driver gear turns a 16-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
38. 38.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
39. 39.🔦 A light sensor reads 30 over black and 70 over white. A good threshold is halfway between them. What is it?
40. 40.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driver turns 35 times. How many times does the driven gear turn?

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