Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 685 · 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 10-tooth driver gear turns a 30-tooth driven gear. The driven gear turns 4 times. How many times did the driver turn?
2. 2.Which job needs a temperature sensor? (a) read a QR code (b) stop before a wall (c) warn if motors get hot (d) know a button is pressed
3. 3.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
4. 4.True or false: “hovering over a roof” suits wheels. (a) True (b) False
5. 5.🛞 Which way of moving suits this best: “loose sand dunes”? (a) propellers (b) legs (c) tracks (d) wheels
6. 6.Which of these suits wheels? (a) stepping over wide gaps (b) loose sand dunes (c) a hospital corridor (d) crossing stepping-stones
7. 7.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
8. 8.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
9. 9.🧭 How many degrees is a right-angle turn? (a) 180° (b) 360° (c) 45° (d) 90°
10. 10.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor is stopped. What does the robot do? (a) goes straight forward (b) stays still (c) turns right (d) spins left on the spot
11. 11.⚙️ How do you make a DC motor spin the other way? (a) shake it (b) swap its two wires (c) paint it red (d) add more wheels
12. 12.True or false: to hear a whistle, use a sound sensor. (a) True (b) False
13. 13.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
14. 14.⚙️ A motor changes electrical energy into … (a) water (b) movement (c) light (d) sound only
15. 15.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
16. 16.🧭 What does a gyro help a robot do? (a) smell smoke (b) see colours (c) hear claps (d) turn by exact angles
17. 17.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
18. 18.⚙️ An 8-tooth driver gear turns a 40-tooth driven gear. The driver turns 45 times. How many times does the driven gear turn?
19. 19.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
20. 20.Which job needs a sound sensor? (a) feel a bump into a wall (b) measure how far a box is (c) read a QR code (d) start on a hand clap
21. 21.⚙️ A 15-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 7 times. How many times did the driver turn?
22. 22.⚙️ An 8-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
23. 23.📡 A robot is 300 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 4 seconds (in cm)?
24. 24.🦾 A servo moves from 130° to 100°. How many degrees does it turn?
25. 25.⚙️ A 60-tooth driver gear turns a 12-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
26. 26.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
27. 27.⚙️ 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
28. 28.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
29. 29.Which of these suits legs? (a) deep mud (b) a field of tall boulders (c) a muddy building site (d) soft snow
30. 30.🔍 Which sensor helps a robot stop before a wall? (a) a distance sensor (b) a camera (c) a touch sensor (d) a gyro sensor
31. 31.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
32. 32.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
33. 33.🛞 The diameter of a wheel is how many times its radius? (a) 4 (b) 3 (c) 1 (d) 2
34. 34.⚙️ A 40-tooth driver gear turns a 20-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
35. 35.🛞 Which way of moving suits this best: “hovering over a roof”? (a) legs (b) tracks (c) propellers (d) wheels
36. 36.🧭 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 180°. It turns right 45°, then left 60°. What does the gyro read now (0° to 359°)?
37. 37.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 18. What is under the sensor? (a) the white floor (b) the black line
38. 38.⚙️ A 24-tooth driver gear turns an 8-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
39. 39.⚙️ A 10-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
40. 40.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?

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