Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 512 · 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.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
2. 2.True or false: to warn if motors get hot, use a gyro sensor. (a) False (b) True
3. 3.🛞 Which way of moving suits this best: “hovering over a roof”? (a) tracks (b) wheels (c) legs (d) propellers
4. 4.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driver turns 10 times. How many times does the driven gear turn?
5. 5.⬛ A reading below the threshold means the sensor is over … (a) water (b) white (c) black (d) the sky
6. 6.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a fan (b) a DC motor (c) a servo motor (d) a buzzer
7. 7.🧭 A robot faces north. It does: turn around, turn left. Which way does it face now? (a) west (b) south (c) north (d) east
8. 8.⚙️ 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
9. 9.🛞 Which way of moving suits this best: “a flat road”? (a) tracks (b) wheels (c) propellers (d) legs
10. 10.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
11. 11.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) under the right sensor (b) between the two sensors (c) far behind it (d) under the left sensor
12. 12.⚙️ A motor makes 240 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?
13. 13.🔍 Why do robots need sensors? (a) to use more power (b) to know their world (c) to be heavier (d) to look colourful
14. 14.⚙️ A 20-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
15. 15.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 35 and the right sensor reads 80. Which sensor is over the black line? (a) both sensors (b) the left sensor (c) neither sensor (d) the right sensor
16. 16.📡 A distance sensor sends a sound pulse and hears the echo 19 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
17. 17.True or false: “a long factory floor” suits wheels. (a) False (b) True
18. 18.🧭 A robot should turn right 90°, but its gyro shows it turned 86°. How many degrees must it turn more to the right?
19. 19.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
20. 20.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
21. 21.🧭 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 left 30°, then right 120°. What does the gyro read now (0° to 359°)?
22. 22.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 21 cm (use π = 22/7). The motor turns 8 times. How far does the robot roll (in cm)?
23. 23.⚙️ A 24-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
24. 24.Which of these suits legs? (a) a flat road (b) flying over a field (c) loose sand dunes (d) crossing stepping-stones
25. 25.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 55. What is under the sensor? (a) the white floor (b) the black line
26. 26.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 15. What is under the sensor? (a) the white floor (b) the black line
27. 27.⚙️ A motor makes 80 turns a minute with a 10-tooth gear on it. That gear drives a 40-tooth gear. How many turns a minute does the 40-tooth gear make?
28. 28.🧭 A robot keeps turning right by 90° at a time. How many turns make one full circle?
29. 29.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 8. What is under the sensor? (a) the white floor (b) the black line
30. 30.Which of these suits wheels? (a) moving under water (b) a smooth classroom floor (c) loose sand dunes (d) a muddy building site
31. 31.🔍 For a robot’s controller, is a sensor an input or an output? (a) an output (b) a wheel (c) a gear (d) an input
32. 32.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
33. 33.📡 A distance sensor sends a sound pulse and hears the echo 8 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
34. 34.True or false: to stop before a wall, use a light sensor. (a) True (b) False
35. 35.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
36. 36.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 18 times. How far does the robot roll (in cm)?
37. 37.Which of these suits wheels? (a) a long factory floor (b) stepping over wide gaps (c) loose sand dunes (d) a muddy building site
38. 38.📡 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 9 seconds (in cm)?
39. 39.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 35. What is under the sensor? (a) the black line (b) the white floor
40. 40.⚙️ A 15-tooth gear drives a 75-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids