Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 159 · 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.🦾 A servo moves from 20° to 10°. How many degrees does it turn?
2. 2.True or false: to hear a whistle, use a sound sensor. (a) False (b) True
3. 3.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
4. 4.True or false: “a flat road” suits tracks. (a) True (b) False
5. 5.📡 An object is 17 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
6. 6.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
7. 7.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 50. What is under the sensor? (a) the white floor (b) the black line
8. 8.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a camera (b) a gyro sensor (c) a sound sensor (d) a touch sensor
9. 9.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 35. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the right sensor (d) the left sensor
10. 10.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) pins (d) tyres
11. 11.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
12. 12.Which job needs a temperature sensor? (a) read a QR code (b) warn if motors get hot (c) feel a bump into a wall (d) stop before a wall
13. 13.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) faster but weaker (c) slower but stronger (d) not at all
14. 14.🛞 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 forward (b) stays still (c) turns right (d) goes straight back
15. 15.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times slower (b) 3 times bigger (c) 3 times louder (d) 3 times faster
16. 16.🧭 A robot spins 15° every second. How many seconds does it take to turn 345°?
17. 17.🔍 Which sensor helps a robot know a button is pressed? (a) a gyro sensor (b) a camera (c) a touch sensor (d) a sound sensor
18. 18.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) fast and easy on floors (c) they look funny (d) they float
19. 19.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
20. 20.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
21. 21.🛞 Which way of moving suits this best: “a muddy building site”? (a) tracks (b) legs (c) propellers (d) wheels
22. 22.🔦 A light sensor reads 40 over black and 60 over white. A good threshold is halfway between them. What is it?
23. 23.🧭 A robot faces south. It does: turn around, turn left, turn right. Which way does it face now? (a) south (b) west (c) east (d) north
24. 24.📡 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)?
25. 25.🔍 Which sensor helps a robot spot a red ball? (a) a sound sensor (b) a light sensor (c) a camera (d) a gyro sensor
26. 26.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 37. What is under the sensor? (a) the white floor (b) the black line
27. 27.🔍 Which sensor helps a robot follow a black line? (a) a light sensor (b) a sound sensor (c) a distance sensor (d) a camera
28. 28.True or false: “flying over a field” suits wheels. (a) False (b) True
29. 29.🛞 A motor’s 10-tooth gear drives a 20-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)?
30. 30.🧭 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 90°. It turns left 120°, then right 180°. What does the gyro read now (0° to 359°)?
31. 31.⚙️ A 12-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
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 motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 7 cm (use π = 22/7). The motor turns 2 times. How far does the robot roll (in cm)?
34. 34.Which of these suits propellers? (a) a long factory floor (b) crossing stepping-stones (c) flying over a field (d) a flat road
35. 35.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
36. 36.⚙️ A 10-tooth driver gear turns a 30-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?
37. 37.🧭 A robot should turn right 180°, but its gyro shows it turned 177°. How many degrees must it turn more to the right?
38. 38.📡 An object is 255 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
39. 39.🔍 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
40. 40.🔦 A light sensor reads 10 over black and 90 over white. A good threshold is halfway between them. What is it?

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