Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 967 · 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.True or false: to stop before a wall, use a touch sensor. (a) True (b) False
2. 2.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) driver gear (c) tyre (d) idler gear
3. 3.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 264 cm?
4. 4.🔍 For a robot’s controller, is a sensor an input or an output? (a) an input (b) a gear (c) a wheel (d) an output
5. 5.📡 A distance sensor sends a sound pulse and hears the echo 20 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
6. 6.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 198 cm?
7. 7.True or false: “crossing stepping-stones” suits wheels. (a) False (b) True
8. 8.⚙️ A motor changes electrical energy into … (a) movement (b) sound only (c) water (d) light
9. 9.📡 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?
10. 10.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
11. 11.True or false: “turns to an exact angle” is true of a DC motor. (a) False (b) True
12. 12.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
13. 13.Which of these suits wheels? (a) loose sand dunes (b) crossing stepping-stones (c) a field of tall boulders (d) a smooth classroom floor
14. 14.🛞 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) turns left (b) turns right (c) spins left on the spot (d) spins right on the spot
15. 15.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a cow (c) a goldfish (d) a snail
16. 16.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
17. 17.🔍 Which sensor helps a robot start on a hand clap? (a) a sound sensor (b) a gyro sensor (c) a touch sensor (d) a distance sensor
18. 18.⚙️ 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
19. 19.Which of these suits legs? (a) crossing stepping-stones (b) a flat road (c) loose sand dunes (d) a smooth classroom floor
20. 20.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 135°. Where does the arm point? (a) points up and right (b) points right (c) points straight up (d) points up and left
21. 21.🛞 A robot wheel has a diameter of 35 cm. Using π = 22/7, what is its circumference (in cm)?
22. 22.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 25 and the right sensor reads 35. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) the right sensor (d) both sensors
23. 23.True or false: “turns to an exact angle” is true of a servo motor. (a) False (b) True
24. 24.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) False (b) True
25. 25.⚙️ An 8-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
26. 26.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
27. 27.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 34 cm (c) 1 km (d) 340 cm
28. 28.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
29. 29.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 85. Which sensor is over the black line? (a) the right sensor (b) neither sensor (c) both sensors (d) the left sensor
30. 30.🔍 Which sensor helps a robot follow a black line? (a) a distance sensor (b) a sound sensor (c) a temperature sensor (d) a light sensor
31. 31.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor
32. 32.True or false: “moving under water” suits tracks. (a) True (b) False
33. 33.⚙️ 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
34. 34.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 25. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) both sensors (d) the right sensor
35. 35.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
36. 36.⚙️ A 30-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
37. 37.🛞 Which way of moving suits this best: “a flat road”? (a) wheels (b) propellers (c) tracks (d) legs
38. 38.True or false: “a field of tall boulders” suits legs. (a) False (b) True
39. 39.🧭 A robot faces north. It does: turn left, turn around. Which way does it face now? (a) east (b) west (c) south (d) north
40. 40.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =

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