Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 38 · 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 motor changes electrical energy into … (a) sound only (b) movement (c) light (d) water
2. 2.🛞 What is the main difficulty with legs for a robot? (a) they never tire (b) too fast on floors (c) harder to balance (d) they are too cheap
3. 3.📡 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?
4. 4.Which of these suits propellers? (a) a muddy building site (b) flying over a field (c) a long factory floor (d) loose sand dunes
5. 5.⚙️ An 8-tooth driver gear turns a 24-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
6. 6.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) shake it (c) paint it red (d) add more wheels
7. 7.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
8. 8.True or false: to stop before a wall, use a gyro sensor. (a) False (b) True
9. 9.True or false: to stop before a wall, use a distance sensor. (a) False (b) True
10. 10.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
11. 11.📡 An object is 187 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
12. 12.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
13. 13.Which of these suits wheels? (a) a muddy building site (b) a smooth classroom floor (c) soft snow (d) flying over a field
14. 14.Which of these suits wheels? (a) moving under water (b) a flat road (c) hovering over a roof (d) crossing stepping-stones
15. 15.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a buzzer (b) a light sensor (c) a servo motor (d) a DC motor
16. 16.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
17. 17.📡 Which animal finds its way by echoes, like this sensor? (a) a goldfish (b) a snail (c) a bat (d) a cow
18. 18.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 65 and the right sensor reads 15. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the right sensor (d) the left sensor
19. 19.📡 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)?
20. 20.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) propellers (b) legs (c) wheels (d) tracks
21. 21.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
22. 22.⚙️ A 30-tooth driver gear turns a 10-tooth driven gear. The driver turns 8 times. How many times does the driven gear turn?
23. 23.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
24. 24.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
25. 25.True or false: “has a signal wire” is true of a servo motor. (a) True (b) False
26. 26.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
27. 27.🛞 Which way of moving suits this best: “a hospital corridor”? (a) legs (b) wheels (c) propellers (d) tracks
28. 28.Which of these suits propellers? (a) crossing stepping-stones (b) stepping over wide gaps (c) moving under water (d) a long factory floor
29. 29.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) not at all (c) slower but stronger (d) faster and weaker
30. 30.Which of these suits legs? (a) flying over a field (b) a smooth classroom floor (c) soft snow (d) stepping over wide gaps
31. 31.🔍 Which sensor helps a robot find the brightest spot? (a) a gyro sensor (b) a sound sensor (c) a light sensor (d) a temperature sensor
32. 32.Which of these suits wheels? (a) a hospital corridor (b) loose sand dunes (c) crossing stepping-stones (d) flying over a field
33. 33.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. The driver turns 14 times. How many times does the driven gear turn?
34. 34.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) goes straight forward (b) turns right (c) goes straight back (d) turns left
35. 35.🔦 A light sensor reads 20 over black and 80 over white. A good threshold is halfway between them. What is it?
36. 36.📡 A robot is 130 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 14 seconds (in cm)?
37. 37.True or false: “hovering over a roof” suits propellers. (a) True (b) False
38. 38.🔍 Which sensor helps a robot measure how far a box is? (a) a gyro sensor (b) a camera (c) a distance sensor (d) a temperature sensor
39. 39.🧭 How many degrees is a right-angle turn? (a) 180° (b) 90° (c) 45° (d) 360°
40. 40.True or false: “stepping over wide gaps” suits tracks. (a) True (b) False

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