Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 280 · 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.🔍 What does a gyro sensor measure? (a) turning (rotation) (b) sound (c) colour (d) temperature
2. 2.🧭 What does a gyro help a robot do? (a) see colours (b) turn by exact angles (c) smell smoke (d) hear claps
3. 3.🛞 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)? =
4. 4.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 26. What is under the sensor? (a) the black line (b) the white floor
5. 5.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
6. 6.⚙️ A 50-tooth driver gear turns a 10-tooth driven gear. The driver turns 8 times. How many times does the driven gear turn?
7. 7.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
8. 8.🧭 How many degrees is a right-angle turn? (a) 45° (b) 360° (c) 90° (d) 180°
9. 9.🛞 Which way of moving suits this best: “a muddy building site”? (a) tracks (b) propellers (c) wheels (d) legs
10. 10.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
11. 11.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 25 and the right sensor reads 90. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
12. 12.📡 Why do we halve the echo’s total path? (a) to make it smaller (b) it goes there and back (c) the sensor is half (d) sound is slow
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 75. Which sensor is over the black line? (a) the right sensor (b) neither sensor (c) both sensors (d) the left sensor
14. 14.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
15. 15.🛞 Which way of moving suits this best: “deep mud”? (a) propellers (b) wheels (c) legs (d) tracks
16. 16.🔍 Which sensor helps a robot read a QR code? (a) a temperature sensor (b) a camera (c) a gyro sensor (d) a touch sensor
17. 17.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
18. 18.🔦 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 black line (b) the white floor
19. 19.🔦 A light sensor reads 20 over black and 70 over white. A good threshold is halfway between them. What is it?
20. 20.⚙️ A motor makes 120 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?
21. 21.🧭 A robot faces south. It does: turn left, turn left, turn left, turn around. Which way does it face now? (a) west (b) south (c) east (d) north
22. 22.📡 A distance sensor sends a sound pulse and hears the echo 14 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
23. 23.🧭 A robot faces south. It does: turn around, turn left. Which way does it face now? (a) north (b) west (c) south (d) east
24. 24.🧭 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 0°. It turns left 120°, then left 120°. What does the gyro read now (0° to 359°)?
25. 25.🔍 A light sensor gets the most reflected light from … (a) a white surface (b) a black surface (c) a dark tunnel (d) a black line
26. 26.⚙️ A 12-tooth driver gear turns a 60-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
27. 27.🛞 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)?
28. 28.🛞 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)? =
29. 29.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 14 cm (use π = 22/7). The motor turns 12 times. How far does the robot roll (in cm)?
30. 30.True or false: “a smooth classroom floor” suits propellers. (a) False (b) True
31. 31.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
32. 32.🧭 A robot faces south. It does: turn right, turn around, turn right, turn around. Which way does it face now? (a) east (b) west (c) south (d) north
33. 33.📡 A robot is 110 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 14 seconds (in cm)?
34. 34.⚙️ A motor makes 120 turns a minute with a 12-tooth gear on it. That gear drives a 24-tooth gear. How many turns a minute does the 24-tooth gear make?
35. 35.📡 An object is 323 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
36. 36.🦾 A servo program runs:
    angle = 10
    angle = angle + 40
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
37. 37.🧭 A robot spins 15° every second. How many seconds does it take to turn 330°?
38. 38.🛞 Circumference = π × … (a) weight (b) radius only (c) diameter (d) speed
39. 39.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
40. 40.⚙️ A 15-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 4 times. How many times did the driver turn?

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