Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 703 · 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 faces west. It does: turn left, turn around, turn left. Which way does it face now? (a) north (b) east (c) south (d) west
2. 2.🧭 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 30°, then right 45°. What does the gyro read now (0° to 359°)?
3. 3.Which of these suits tracks? (a) a flat road (b) a hospital corridor (c) stepping over wide gaps (d) deep mud
4. 4.⚙️ A 10-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
5. 5.⚙️ A motor changes electrical energy into … (a) sound only (b) movement (c) light (d) water
6. 6.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) slower but stronger (c) faster but weaker (d) not at all
7. 7.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) faster (b) nowhere (c) slower (d) backwards
8. 8.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 9. What is under the sensor? (a) the black line (b) the white floor
9. 9.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 264 cm?
10. 10.🦾 A servo moves from 80° to 90°. How many degrees does it turn?
11. 11.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. The driver turns 14 times. How many times does the driven gear turn?
12. 12.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
13. 13.⚙️ How do you make a DC motor spin the other way? (a) shake it (b) paint it red (c) swap its two wires (d) add more wheels
14. 14.🛞 A robot wheel has a diameter of 35 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 120°?
16. 16.🦾 A servo moves from 110° to 40°. How many degrees does it turn?
17. 17.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. The driver turns 10 times. How many times does the driven gear turn?
18. 18.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
19. 19.Which job needs a temperature sensor? (a) read a QR code (b) measure how far a box is (c) warn if motors get hot (d) know a button is pressed
20. 20.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
21. 21.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
22. 22.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
23. 23.True or false: to hear a whistle, use a temperature sensor. (a) True (b) False
24. 24.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
25. 25.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 3 times (in cm)?
26. 26.🛞 Which way of moving suits this best: “moving under water”? (a) legs (b) tracks (c) wheels (d) propellers
27. 27.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 41. What is under the sensor? (a) the white floor (b) the black line
28. 28.True or false: “loose sand dunes” suits tracks. (a) False (b) True
29. 29.🔍 Which sensor helps a robot stop before a wall? (a) a temperature sensor (b) a distance sensor (c) a sound sensor (d) a camera
30. 30.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) zero (c) big (slow and strong) (d) never important
31. 31.🧭 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 30°, then right 30°, then right 30°. What does the gyro read now (0° to 359°)?
32. 32.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 33. What is under the sensor? (a) the white floor (b) the black line
33. 33.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 4 (c) 2 (d) 1
34. 34.🧭 A robot should turn right 90°, but its gyro shows it turned 86°. How many degrees must it turn more to the right?
35. 35.🧭 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 270°. It turns right 45°, then left 180°. What does the gyro read now (0° to 359°)?
36. 36.📡 An object is 34 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
37. 37.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) one up, one down (c) in opposite directions (d) they do not turn
38. 38.🧭 A robot faces south. It does: turn right, turn left, turn left. Which way does it face now? (a) west (b) east (c) south (d) north
39. 39.True or false: to feel a bump into a wall, use a touch sensor. (a) True (b) False
40. 40.🛞 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) spins left on the spot (b) stays still (c) goes straight forward (d) spins right on the spot

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