Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 58 · 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 90 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
2. 2.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 180°. Where does the arm point? (a) points right (b) points left (c) points up and right (d) points straight up
3. 3.🦾 A servo moves from 150° to 130°. How many degrees does it turn?
4. 4.True or false: to spot a red ball, use a sound sensor. (a) True (b) False
5. 5.True or false: to know a button is pressed, use a touch sensor. (a) False (b) True
6. 6.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
7. 7.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a snail (c) a cow (d) a goldfish
8. 8.⬛ A reading below the threshold means the sensor is over … (a) white (b) black (c) water (d) the sky
9. 9.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 65. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) neither sensor (d) the left sensor
10. 10.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
11. 11.🦾 A servo program runs:
    angle = 10
    angle = angle + 40
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
12. 12.⚙️ A 10-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
13. 13.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) spokes (c) pins (d) teeth
14. 14.📡 A robot is 280 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 8 seconds (in cm)?
15. 15.True or false: “a muddy building site” suits legs. (a) False (b) True
16. 16.🦾 A servo program runs:
    angle = 20
    angle = angle + 20
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
17. 17.🔍 Which sensor helps a robot feel a bump into a wall? (a) a gyro sensor (b) a touch sensor (c) a temperature sensor (d) a light sensor
18. 18.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
19. 19.🔦 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) both sensors (b) the left sensor (c) neither sensor (d) the right sensor
20. 20.🧭 A robot should turn right 180°, but its gyro shows it turned 178°. How many degrees must it turn more to the right?
21. 21.True or false: “soft snow” suits wheels. (a) False (b) True
22. 22.🧭 A robot should turn right 45°, but its gyro shows it turned 32°. How many degrees must it turn more to the right?
23. 23.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
24. 24.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
25. 25.🛞 Which way of moving suits this best: “loose sand dunes”? (a) legs (b) tracks (c) propellers (d) wheels
26. 26.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 30 and the right sensor reads 80. Which sensor is over the black line? (a) the right sensor (b) neither sensor (c) the left sensor (d) both sensors
27. 27.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
28. 28.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 95 and the right sensor reads 90. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the left sensor (d) the right sensor
29. 29.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
30. 30.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 264 cm?
31. 31.📡 A distance sensor sends a sound pulse and hears the echo 4 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
32. 32.Which of these suits legs? (a) a hospital corridor (b) a field of tall boulders (c) loose sand dunes (d) hovering over a roof
33. 33.🛞 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)? =
34. 34.📡 A robot is 150 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 27 seconds (in cm)?
35. 35.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
36. 36.True or false: to spot a red ball, use a camera. (a) False (b) True
37. 37.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
38. 38.🧭 A robot should turn right 180°, but its gyro shows it turned 185°. How many degrees must it turn back to the left?
39. 39.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
40. 40.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a servo (b) a gear (c) a track (d) a caster wheel

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