Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 378 · 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 runs backward and the right motor runs forward. What does the robot do? (a) turns left (b) stays still (c) spins right on the spot (d) spins left on the spot
2. 2.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) shake it (c) add more wheels (d) paint it red
3. 3.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
4. 4.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) slower but stronger (c) not at all (d) at the same speed
5. 5.Which of these suits wheels? (a) loose sand dunes (b) flying over a field (c) soft snow (d) a long factory floor
6. 6.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
7. 7.🛞 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)? =
8. 8.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
9. 9.🧭 A robot faces north. It does: turn around, turn left, turn around, turn left. Which way does it face now? (a) west (b) south (c) north (d) east
10. 10.🧭 A robot faces north. It does: turn right, turn around. Which way does it face now? (a) north (b) south (c) east (d) west
11. 11.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
12. 12.🧭 How many degrees is a full turn? (a) 180° (b) 100° (c) 360° (d) 90°
13. 13.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a sound sensor (b) a camera (c) a gyro sensor (d) a touch sensor
14. 14.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
15. 15.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
16. 16.⚙️ A 100-tooth driver gear turns a 20-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
17. 17.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
18. 18.📡 An object is 51 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
19. 19.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
20. 20.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
21. 21.True or false: “a flat road” suits wheels. (a) True (b) False
22. 22.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
23. 23.⬛ A reading below the threshold means the sensor is over … (a) white (b) the sky (c) black (d) water
24. 24.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
25. 25.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
26. 26.📡 A robot is 290 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 33 seconds (in cm)?
27. 27.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
28. 28.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) zero (c) never important (d) big (slow and strong)
29. 29.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
30. 30.🛞 Which way of moving suits this best: “soft snow”? (a) wheels (b) tracks (c) propellers (d) legs
31. 31.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?
32. 32.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
33. 33.🧭 A robot spins 60° every second. How many seconds does it take to turn 60°?
34. 34.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
35. 35.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
36. 36.🔦 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 black line (b) the white floor
37. 37.📡 A robot is 240 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 6 seconds (in cm)?
38. 38.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) legs (b) tracks (c) propellers (d) wheels
39. 39.📡 Why do we halve the echo’s total path? (a) the sensor is half (b) it goes there and back (c) to make it smaller (d) sound is slow
40. 40.⚙️ A 30-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster

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