Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 203 · 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 robot faces south. It does: turn right, turn left, turn around, turn right. Which way does it face now? (a) west (b) south (c) north (d) east
2. 2.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
3. 3.Which of these suits legs? (a) loose sand dunes (b) stepping over wide gaps (c) hovering over a roof (d) a flat road
4. 4.🔍 A light sensor gets the most reflected light from … (a) a dark tunnel (b) a black surface (c) a white surface (d) a black line
5. 5.Which of these suits wheels? (a) deep mud (b) hovering over a roof (c) a hospital corridor (d) crossing stepping-stones
6. 6.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 10° (d) 18°
7. 7.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
8. 8.📡 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?
9. 9.⚙️ A 32-tooth driver gear turns an 8-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
10. 10.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
11. 11.🔍 Why do robots need sensors? (a) to use more power (b) to look colourful (c) to know their world (d) to be heavier
12. 12.True or false: “deep mud” suits tracks. (a) False (b) True
13. 13.🔍 Which sensor helps a robot measure how far a box is? (a) a light sensor (b) a distance sensor (c) a sound sensor (d) a touch sensor
14. 14.📡 A robot is 230 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 7 seconds (in cm)?
15. 15.📡 Which object is hardest for an echo sensor to notice? (a) a flat wall (b) a wooden box (c) a soft foam cushion (d) a metal door
16. 16.⚙️ A motor changes electrical energy into … (a) sound only (b) light (c) water (d) movement
17. 17.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 90°. Where does the arm point? (a) points up and right (b) points right (c) points left (d) points straight up
18. 18.Which job needs a temperature sensor? (a) start on a hand clap (b) measure how far a box is (c) warn if motors get hot (d) find the brightest spot
19. 19.⚙️ A 15-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
20. 20.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 70 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
21. 21.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. The driver turns 16 times. How many times does the driven gear turn?
22. 22.Which of these suits tracks? (a) moving under water (b) loose sand dunes (c) a field of tall boulders (d) a smooth classroom floor
23. 23.⚙️ A 20-tooth driver gear turns a 100-tooth driven gear. The driven gear turns 10 times. How many times did the driver turn?
24. 24.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
25. 25.🧭 How many degrees is a half turn (turn around)? (a) 45° (b) 180° (c) 360° (d) 90°
26. 26.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
27. 27.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 54. What is under the sensor? (a) the white floor (b) the black line
28. 28.📡 An object is 68 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
29. 29.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
30. 30.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
31. 31.📡 A distance sensor sends a sound pulse and hears the echo 7 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
32. 32.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 40. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
33. 33.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
34. 34.Which of these suits tracks? (a) a muddy building site (b) crossing stepping-stones (c) stepping over wide gaps (d) a smooth classroom floor
35. 35.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
36. 36.True or false: “reverses if wires swap” is true of a DC motor. (a) False (b) True
37. 37.⚙️ A 32-tooth driver gear turns an 8-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
38. 38.⬛ A reading below the threshold means the sensor is over … (a) white (b) the sky (c) water (d) black
39. 39.🦾 A servo program runs:
    angle = 160
    angle = angle − 50
    angle = angle − 40
    angle = angle + 30
    angle = angle − 60
    To what angle (in degrees) does the servo turn in the end?
40. 40.📡 A robot is 280 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 43 seconds (in cm)?

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