Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 939 · 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.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 4 (c) 1 (d) 2
2. 2.🛞 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)? =
3. 3.Which of these suits wheels? (a) a field of tall boulders (b) hovering over a roof (c) moving under water (d) a flat road
4. 4.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 35 and the right sensor reads 85. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) both sensors (d) the right sensor
5. 5.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points right (b) points up and right (c) points left (d) points up and left
6. 6.📡 A robot is 160 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 5 seconds (in cm)?
7. 7.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
8. 8.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
9. 9.🛞 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) spins left on the spot (b) turns right (c) spins right on the spot (d) turns left
10. 10.🧭 A robot faces west. It does: turn around, turn right. Which way does it face now? (a) east (b) north (c) south (d) west
11. 11.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
12. 12.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
13. 13.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
14. 14.⚙️ The gear fixed to the motor is called the … (a) idler gear (b) driven gear (c) tyre (d) driver gear
15. 15.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times faster (b) 3 times louder (c) 3 times bigger (d) 3 times slower
16. 16.🛞 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 4 times. How far does the robot roll (in cm)?
17. 17.🛞 Which way of moving suits this best: “a muddy building site”? (a) wheels (b) legs (c) propellers (d) tracks
18. 18.⚙️ A motor makes 200 turns a minute with a 12-tooth gear on it. That gear drives a 48-tooth gear. How many turns a minute does the 48-tooth gear make?
19. 19.⬛ Why does a light sensor read a LOW number over a black line? (a) black is wet (b) black is loud (c) black soaks up light (d) black is hot
20. 20.Which of these suits propellers? (a) deep mud (b) moving under water (c) a hospital corridor (d) a flat road
21. 21.True or false: to measure how far a box is, use a camera. (a) True (b) False
22. 22.🔍 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
23. 23.🛞 Circumference = π × … (a) weight (b) diameter (c) radius only (d) speed
24. 24.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
25. 25.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
26. 26.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 65 and the right sensor reads 80. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) neither sensor (d) the left sensor
27. 27.📡 A distance sensor sends a sound pulse and hears the echo 5 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
28. 28.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
29. 29.True or false: “a field of tall boulders” suits legs. (a) False (b) True
30. 30.⚙️ A 10-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
31. 31.🧭 A robot spins 30° every second. How many seconds does it take to turn 300°?
32. 32.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
33. 33.⚙️ A 24-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
34. 34.📡 A distance sensor sends a sound pulse and hears the echo 18 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
35. 35.🔍 Why do robots need sensors? (a) to use more power (b) to be heavier (c) to know their world (d) to look colourful
36. 36.🔦 A light sensor reads 40 over black and 60 over white. A good threshold is halfway between them. What is it?
37. 37.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 95 and the right sensor reads 15. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
38. 38.Which job needs a light sensor? (a) feel a bump into a wall (b) start on a hand clap (c) read a QR code (d) find the brightest spot
39. 39.⚙️ A 30-tooth driver gear turns a 10-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
40. 40.🔍 Which sensor helps a robot find the brightest spot? (a) a light sensor (b) a gyro sensor (c) a sound sensor (d) a distance sensor

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