Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 59 · 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 has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) goes straight back (b) goes straight forward (c) turns right (d) turns left
2. 2.🧭 A robot faces north. It does: turn right, turn right, turn around, turn right. Which way does it face now? (a) south (b) north (c) west (d) east
3. 3.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
4. 4.True or false: to find the brightest spot, use a light sensor. (a) False (b) True
5. 5.🧭 What does a gyro help a robot do? (a) hear claps (b) turn by exact angles (c) see colours (d) smell smoke
6. 6.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
7. 7.Which of these suits tracks? (a) loose sand dunes (b) stepping over wide gaps (c) moving under water (d) a long factory floor
8. 8.🔍 Which sensor helps a robot read a QR code? (a) a camera (b) a light sensor (c) a distance sensor (d) a touch sensor
9. 9.True or false: to stop before a wall, use a distance sensor. (a) False (b) True
10. 10.🧭 A robot spins 60° every second. How many seconds does it take to turn 120°?
11. 11.🔦 A light sensor reads 20 over black and 90 over white. A good threshold is halfway between them. What is it?
12. 12.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
13. 13.🧭 How many degrees is a right-angle turn? (a) 45° (b) 360° (c) 90° (d) 180°
14. 14.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) zero (b) small (fast, weak) (c) never important (d) big (slow and strong)
15. 15.🧭 A robot faces west. It does: turn right, turn right, turn left. Which way does it face now? (a) north (b) east (c) south (d) west
16. 16.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
17. 17.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 56. What is under the sensor? (a) the black line (b) the white floor
18. 18.True or false: to stay balanced upright, use a camera. (a) True (b) False
19. 19.True or false: “a flat road” suits tracks. (a) False (b) True
20. 20.⚙️ An 8-tooth driver gear turns a 16-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
21. 21.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
22. 22.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 18° (c) 180° (d) 1800°
23. 23.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) not at all (c) faster but weaker (d) slower but stronger
24. 24.🔍 What does a gyro sensor measure? (a) turning (rotation) (b) sound (c) temperature (d) colour
25. 25.⚙️ 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 big driver gear (b) a small driver gear
26. 26.Which job needs a distance sensor? (a) read a QR code (b) spot a red ball (c) measure a turn angle (d) measure how far a box is
27. 27.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 7/22 (b) 2/7 (c) 22 (d) 22/7
28. 28.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
29. 29.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
30. 30.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. The driven gear turns 9 times. How many times did the driver turn?
31. 31.True or false: “a hospital corridor” suits wheels. (a) True (b) False
32. 32.📡 A distance sensor sends a sound pulse and hears the echo 2 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
33. 33.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 62. What is under the sensor? (a) the black line (b) the white floor
34. 34.⚙️ A motor makes 600 turns a minute with a 15-tooth gear on it. That gear drives a 75-tooth gear. How many turns a minute does the 75-tooth gear make?
35. 35.⚙️ A 12-tooth driver gear turns a 36-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
36. 36.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
37. 37.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 20. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) the right sensor (d) both sensors
38. 38.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
39. 39.📡 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?
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 65. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the right sensor (d) the left sensor

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