Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 763 · 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’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 88 cm?
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 4 times (in cm)? =
3. 3.🛞 How does a two-wheeled robot with no steering turn? (a) it stops for ever (b) one wheel runs faster (c) it uses a sail (d) it jumps
4. 4.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
5. 5.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
6. 6.🔦 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 white floor (b) the black line
7. 7.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
8. 8.📡 An object is 255 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
9. 9.🧭 A robot faces west. It does: turn left, turn around, turn right, turn left. Which way does it face now? (a) north (b) west (c) east (d) south
10. 10.Which job needs a temperature sensor? (a) feel a bump into a wall (b) find the brightest spot (c) warn if motors get hot (d) know a button is pressed
11. 11.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. The driver turns 10 times. How many times does the driven gear turn?
12. 12.⚙️ A motor changes electrical energy into … (a) water (b) light (c) movement (d) sound only
13. 13.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
14. 14.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
15. 15.📡 A distance sensor sends a sound pulse and hears the echo 11 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
16. 16.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a gyro sensor (b) a camera (c) a sound sensor (d) a touch sensor
17. 17.📡 A robot is 150 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 5 seconds (in cm)?
18. 18.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
19. 19.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) in opposite directions (c) they do not turn (d) the same direction
20. 20.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
21. 21.📡 An object is 289 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
22. 22.Which job needs a light sensor? (a) stop before a wall (b) follow a black line (c) spot a red ball (d) stay balanced upright
23. 23.⚙️ A 12-tooth driver gear turns a 60-tooth driven gear. The driver turns 45 times. How many times does the driven gear turn?
24. 24.🔍 What does a gyro sensor measure? (a) colour (b) temperature (c) sound (d) turning (rotation)
25. 25.📡 A robot is 240 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 11 seconds (in cm)?
26. 26.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) not at all (c) at the same speed (d) slower but stronger
27. 27.⬛ A reading below the threshold means the sensor is over … (a) white (b) the sky (c) water (d) black
28. 28.🛞 How far does a wheel roll in one full turn? (a) its radius (b) its diameter (c) its circumference (d) its weight
29. 29.📡 A robot is 190 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 7 seconds (in cm)?
30. 30.Which job needs a light sensor? (a) hear a whistle (b) start on a hand clap (c) find the brightest spot (d) measure a turn angle
31. 31.⚙️ A 12-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
32. 32.True or false: to find the brightest spot, use a light sensor. (a) False (b) True
33. 33.🛞 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 forward. What does the robot do? (a) turns right (b) goes straight forward (c) spins right on the spot (d) goes straight back
34. 34.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 65 and the right sensor reads 60. Which sensor is over the black line? (a) the left sensor (b) the right sensor (c) both sensors (d) neither sensor
35. 35.True or false: to feel a bump into a wall, use a touch sensor. (a) True (b) False
36. 36.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
37. 37.True or false: to know a button is pressed, use a light sensor. (a) True (b) False
38. 38.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs backward. What does the robot do? (a) turns left (b) spins right on the spot (c) goes straight forward (d) goes straight back
39. 39.⚙️ An 8-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 85 and the right sensor reads 95. Which sensor is over the black line? (a) both sensors (b) the left sensor (c) the right sensor (d) neither sensor

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