Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 586 · 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 sensor helps a robot read a QR code? (a) a distance sensor (b) a touch sensor (c) a camera (d) a sound sensor
2. 2.Which of these suits wheels? (a) soft snow (b) a hospital corridor (c) moving under water (d) deep mud
3. 3.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
4. 4.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 90 and the right sensor reads 60. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) the right sensor (d) neither sensor
5. 5.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) slower but stronger (c) at the same speed (d) not at all
6. 6.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 55. What is under the sensor? (a) the black line (b) the white floor
7. 7.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
8. 8.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True
9. 9.📡 A robot is 170 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 6 seconds (in cm)?
10. 10.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
11. 11.Which job needs a light sensor? (a) find the brightest spot (b) measure how far a box is (c) hear a whistle (d) spot a red ball
12. 12.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 65. Which sensor is over the black line? (a) the left sensor (b) the right sensor (c) neither sensor (d) both sensors
14. 14.🧭 A robot spins 45° every second. How many seconds does it take to turn 45°?
15. 15.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 45° (c) 360° (d) 180°
16. 16.🦾 A servo moves from 10° to 0°. How many degrees does it turn?
17. 17.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor is stopped. What does the robot do? (a) goes straight back (b) turns right (c) spins right on the spot (d) goes straight forward
18. 18.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) faster (b) nowhere (c) backwards (d) slower
19. 19.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
20. 20.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
21. 21.🔍 Which sensor helps a robot spot a red ball? (a) a temperature sensor (b) a light sensor (c) a camera (d) a gyro sensor
22. 22.🧭 How many degrees is a right-angle turn? (a) 90° (b) 360° (c) 45° (d) 180°
23. 23.🛞 How does a two-wheeled robot with no steering turn? (a) one wheel runs faster (b) it jumps (c) it uses a sail (d) it stops for ever
24. 24.⬛ A reading below the threshold means the sensor is over … (a) water (b) black (c) the sky (d) white
25. 25.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
26. 26.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) wheels (b) propellers (c) legs (d) tracks
27. 27.🧭 What does a gyro help a robot do? (a) hear claps (b) turn by exact angles (c) smell smoke (d) see colours
28. 28.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) an input (c) a gear (d) an output
29. 29.True or false: to warn if motors get hot, use a camera. (a) True (b) False
30. 30.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 63. What is under the sensor? (a) the black line (b) the white floor
31. 31.🛞 A robot wheel has a diameter of 28 cm. Using π = 22/7, what is its circumference (in cm)?
32. 32.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 4 times. How far does the robot roll (in cm)?
33. 33.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
34. 34.🧭 A robot spins 15° every second. How many seconds does it take to turn 15°?
35. 35.⚙️ An 8-tooth driver gear turns a 32-tooth driven gear. The driven gear turns 10 times. How many times did the driver turn?
36. 36.🧭 A robot should turn right 90°, but its gyro shows it turned 78°. How many degrees must it turn more to the right?
37. 37.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
38. 38.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) at the same speed (c) faster but weaker (d) slower but stronger
39. 39.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 70. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) both sensors (d) the right sensor

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