Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 349 · 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: “has a signal wire” is true of a DC motor. (a) True (b) False
2. 2.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
3. 3.🦾 A servo moves from 140° to 80°. How many degrees does it turn?
4. 4.🧭 A robot faces south. It does: turn right, turn right, turn left, turn around. Which way does it face now? (a) north (b) south (c) west (d) east
5. 5.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor
6. 6.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a servo motor (c) a buzzer (d) a DC motor
7. 7.True or false: to feel a bump into a wall, use a sound sensor. (a) False (b) True
8. 8.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
9. 9.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
10. 10.⚙️ A 20-tooth driver gear turns an 80-tooth driven gear. The driver turns 20 times. How many times does the driven gear turn?
11. 11.📡 An object is 68 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
12. 12.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 25. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor
13. 13.🧭 What does a gyro help a robot do? (a) smell smoke (b) see colours (c) turn by exact angles (d) hear claps
14. 14.⚙️ How do you make a DC motor spin the other way? (a) add more wheels (b) swap its two wires (c) paint it red (d) shake it
15. 15.🔍 A light sensor gets the most reflected light from … (a) a white surface (b) a dark tunnel (c) a black line (d) a black surface
16. 16.True or false: to stop before a wall, use a light sensor. (a) True (b) False
17. 17.Which job needs a temperature sensor? (a) spot a red ball (b) stop before a wall (c) warn if motors get hot (d) measure a turn angle
18. 18.📡 A robot is 190 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 21 seconds (in cm)?
19. 19.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
20. 20.🧭 How many degrees is a full turn? (a) 90° (b) 100° (c) 180° (d) 360°
21. 21.Which of these suits wheels? (a) hovering over a roof (b) crossing stepping-stones (c) a smooth classroom floor (d) soft snow
22. 22.🧭 A robot keeps turning right by 90° at a time. How many turns make one full circle?
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.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 20. What is under the sensor? (a) the black line (b) the white floor
25. 25.🔦 A light sensor reads 10 over black and 80 over white. A good threshold is halfway between them. What is it?
26. 26.📡 An object is 306 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
27. 27.🔍 What does a gyro sensor measure? (a) temperature (b) turning (rotation) (c) colour (d) sound
28. 28.⚙️ 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 big driver gear (b) a small driver gear
29. 29.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
30. 30.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
31. 31.🧭 A robot spins 15° every second. How many seconds does it take to turn 360°?
32. 32.🔍 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
33. 33.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) wheels (b) tracks (c) propellers (d) legs
34. 34.⚙️ A motor makes 80 turns a minute with an 8-tooth gear on it. That gear drives a 32-tooth gear. How many turns a minute does the 32-tooth gear make?
35. 35.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 60. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor
36. 36.🧭 A robot spins 90° every second. How many seconds does it take to turn 90°?
37. 37.🔍 Which sensor helps a robot stay balanced upright? (a) a gyro sensor (b) a light sensor (c) a distance sensor (d) a touch sensor
38. 38.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
39. 39.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) the same direction (c) one up, one down (d) in opposite directions
40. 40.🦾 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 left (b) points up and right (c) points straight up (d) points right

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