Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 182 · 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.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
2. 2.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
3. 3.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
4. 4.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 1 km (c) 34 cm (d) 340 cm
5. 5.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
6. 6.🔍 Why do robots need sensors? (a) to know their world (b) to be heavier (c) to look colourful (d) to use more power
7. 7.⚙️ A 60-tooth driver gear turns a 20-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
8. 8.⚙️ An 8-tooth driver gear turns a 30-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
9. 9.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 360° (c) 180° (d) 45°
10. 10.Which of these suits propellers? (a) flying over a field (b) soft snow (c) a smooth classroom floor (d) stepping over wide gaps
11. 11.📡 An object is 85 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
12. 12.Which job needs a distance sensor? (a) find the brightest spot (b) warn if motors get hot (c) measure how far a box is (d) measure a turn angle
13. 13.📡 A distance sensor sends a sound pulse and hears the echo 15 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
14. 14.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
15. 15.📡 An object is 238 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
16. 16.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they spread the weight (c) they are round (d) they spin in the air
17. 17.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 10° (c) 180° (d) 18°
18. 18.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) the same direction (c) in opposite directions (d) one up, one down
19. 19.🧭 A robot should turn right 180°, but its gyro shows it turned 191°. How many degrees must it turn back to the left?
20. 20.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
21. 21.🔦 A light sensor reads 10 over black and 60 over white. A good threshold is halfway between them. What is it?
22. 22.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
23. 23.🧭 A robot should turn right 45°, but its gyro shows it turned 49°. How many degrees must it turn back to the left?
24. 24.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 75. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
25. 25.🛞 Which way of moving suits this best: “a flat road”? (a) tracks (b) legs (c) wheels (d) propellers
26. 26.🔍 What does a gyro sensor measure? (a) temperature (b) colour (c) sound (d) turning (rotation)
27. 27.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
28. 28.🛞 Which way of moving suits this best: “flying over a field”? (a) wheels (b) legs (c) tracks (d) propellers
29. 29.🔦 A light sensor reads 20 over black and 60 over white. A good threshold is halfway between them. What is it?
30. 30.⬛ Why does a light sensor read a LOW number over a black line? (a) black is wet (b) black is loud (c) black is hot (d) black soaks up light
31. 31.⚙️ A motor makes 270 turns a minute with a 10-tooth gear on it. That gear drives a 30-tooth gear. How many turns a minute does the 30-tooth gear make?
32. 32.🔍 Which sensor helps a robot warn if motors get hot? (a) a touch sensor (b) a sound sensor (c) a temperature sensor (d) a camera
33. 33.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
34. 34.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
35. 35.📡 A robot is 190 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 4 seconds (in cm)?
36. 36.True or false: “a long factory floor” suits wheels. (a) True (b) False
37. 37.Which of these suits legs? (a) loose sand dunes (b) a hospital corridor (c) stepping over wide gaps (d) a smooth classroom floor
38. 38.Which of these suits propellers? (a) hovering over a roof (b) a flat road (c) soft snow (d) a smooth classroom floor
39. 39.🛞 How far does a wheel roll in one full turn? (a) its circumference (b) its diameter (c) its weight (d) its radius
40. 40.True or false: “a long factory floor” suits tracks. (a) False (b) True

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