Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 408 · 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 should turn right 180°, but its gyro shows it turned 194°. How many degrees must it turn back to the left?
2. 2.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 90 and the right sensor reads 25. Which sensor is over the black line? (a) the left sensor (b) neither sensor (c) the right sensor (d) both sensors
3. 3.⚙️ A 20-tooth driver gear turns an 80-tooth driven gear. The driver turns 12 times. How many times does the driven gear turn?
4. 4.🛞 What is the main difficulty with legs for a robot? (a) too fast on floors (b) harder to balance (c) they never tire (d) they are too cheap
5. 5.📡 A robot is 200 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 11 seconds (in cm)?
6. 6.⚙️ 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
7. 7.📡 A robot is 170 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 1 second (in cm)?
8. 8.🧭 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 45°, then left 45°, then left 120°. What does the gyro read now (0° to 359°)?
9. 9.Which of these suits propellers? (a) stepping over wide gaps (b) a flat road (c) flying over a field (d) soft snow
10. 10.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
11. 11.🔍 Which sensor helps a robot measure a turn angle? (a) a camera (b) a distance sensor (c) a gyro sensor (d) a light sensor
12. 12.🧭 A robot should turn right 180°, but its gyro shows it turned 191°. How many degrees must it turn back to the left?
13. 13.🧭 A robot should turn right 180°, but its gyro shows it turned 177°. How many degrees must it turn more to the right?
14. 14.🔍 Which sensor helps a robot know a button is pressed? (a) a gyro sensor (b) a temperature sensor (c) a light sensor (d) a touch sensor
15. 15.🛞 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) turns left (b) turns right (c) goes straight back (d) stays still
16. 16.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
17. 17.Which job needs a sound sensor? (a) hear a whistle (b) measure a turn angle (c) follow a black line (d) read a QR code
18. 18.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
19. 19.📡 A robot is 110 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 3 seconds (in cm)?
20. 20.🧭 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 45°, then left 135°, then left 135°. What does the gyro read now (0° to 359°)?
21. 21.📡 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)?
22. 22.🧭 A robot keeps turning right by 60° at a time. How many turns make one full circle?
23. 23.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
24. 24.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driven gear turns 5 times. How many times did the driver turn?
25. 25.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
26. 26.🧭 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 90°. It turns left 120°, then left 60°. What does the gyro read now (0° to 359°)?
27. 27.⬛ The threshold of a light sensor is … (a) the wheel size (b) the top speed (c) the battery size (d) the black/white cut-off
28. 28.⚙️ An 8-tooth driver gear turns a 24-tooth driven gear. The driven gear turns 6 times. How many times did the driver turn?
29. 29.True or false: “spins round and round” is true of a DC motor. (a) False (b) True
30. 30.🧭 How many degrees is a full turn? (a) 100° (b) 180° (c) 360° (d) 90°
31. 31.🧭 A robot spins 90° every second. How many seconds does it take to turn 270°?
32. 32.📡 Which animal finds its way by echoes, like this sensor? (a) a cow (b) a bat (c) a snail (d) a goldfish
33. 33.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 65 and the right sensor reads 20. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) both sensors (d) the left sensor
34. 34.⚙️ A 10-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
35. 35.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
36. 36.🛞 Which way of moving suits this best: “soft snow”? (a) wheels (b) tracks (c) propellers (d) legs
37. 37.True or false: “has a signal wire” is true of a DC motor. (a) False (b) True
38. 38.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points right (b) points left (c) points up and left (d) points up and right
39. 39.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
40. 40.⚙️ An 8-tooth driver gear turns a 16-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?

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