Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 567 · 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.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) False (b) True
2. 2.📡 A robot is 100 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)?
3. 3.🧭 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 270°. It turns left 60°, then right 180°, then left 120°. What does the gyro read now (0° to 359°)?
4. 4.🛞 Which way of moving suits this best: “soft snow”? (a) wheels (b) legs (c) tracks (d) propellers
5. 5.🔍 Why do robots need sensors? (a) to be heavier (b) to use more power (c) to look colourful (d) to know their world
6. 6.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
7. 7.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
8. 8.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
9. 9.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
10. 10.🧭 A robot faces south. It does: turn around, turn left. Which way does it face now? (a) east (b) north (c) west (d) south
11. 11.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor runs backward. What does the robot do? (a) goes straight forward (b) turns right (c) stays still (d) spins right on the spot
12. 12.🔍 Which sensor helps a robot read a QR code? (a) a touch sensor (b) a distance sensor (c) a camera (d) a gyro sensor
13. 13.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) propellers (b) tracks (c) wheels (d) legs
14. 14.🛞 Which way of moving suits this best: “deep mud”? (a) propellers (b) tracks (c) wheels (d) legs
15. 15.⚙️ A 40-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
16. 16.🧭 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 180°. It turns right 30°, then left 60°. What does the gyro read now (0° to 359°)?
17. 17.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
18. 18.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
19. 19.🦾 A servo moves from 50° to 40°. How many degrees does it turn?
20. 20.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 8 times. How far does the robot roll (in cm)?
21. 21.⚙️ A 15-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
22. 22.📡 A robot is 160 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 1 second (in cm)?
23. 23.🧭 A robot faces east. It does: turn left, turn around. Which way does it face now? (a) south (b) east (c) west (d) north
24. 24.🛞 Circumference = π × … (a) diameter (b) speed (c) weight (d) radius only
25. 25.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 95 and the right sensor reads 20. Which sensor is over the black line? (a) the right sensor (b) neither sensor (c) the left sensor (d) both sensors
26. 26.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how many full turns must they make to roll 1320 cm?
27. 27.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a light sensor (d) a DC motor
28. 28.🧭 A robot faces north. It does: turn right, turn right. Which way does it face now? (a) west (b) south (c) north (d) east
29. 29.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times louder (b) 3 times faster (c) 3 times slower (d) 3 times bigger
30. 30.🔍 What does a gyro sensor measure? (a) temperature (b) turning (rotation) (c) colour (d) sound
31. 31.📡 A robot is 260 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 2 seconds (in cm)?
32. 32.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
33. 33.🔦 A light sensor reads 10 over black and 80 over white. A good threshold is halfway between them. What is it?
34. 34.🔦 A light sensor reads 10 over black and 70 over white. A good threshold is halfway between them. What is it?
35. 35.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
36. 36.🧭 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 right 60°, then left 45°. What does the gyro read now (0° to 359°)?
37. 37.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
38. 38.⚙️ A motor makes 440 turns a minute with a 15-tooth gear on it. That gear drives a 60-tooth gear. How many turns a minute does the 60-tooth gear make?
39. 39.🛞 Which way of moving suits this best: “moving under water”? (a) wheels (b) legs (c) propellers (d) tracks
40. 40.📡 An object is 187 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?

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