Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 90 · 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 around, turn around, turn right. Which way does it face now? (a) east (b) north (c) south (d) west
2. 2.🧭 A robot spins 30° every second. How many seconds does it take to turn 150°?
3. 3.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
4. 4.⬛ Why does a light sensor read a LOW number over a black line? (a) black is hot (b) black is loud (c) black is wet (d) black soaks up light
5. 5.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor is stopped. What does the robot do? (a) spins left on the spot (b) goes straight back (c) spins right on the spot (d) turns right
6. 6.🛞 Which way of moving suits this best: “flying over a field”? (a) legs (b) wheels (c) tracks (d) propellers
7. 7.True or false: to know a button is pressed, use a touch sensor. (a) False (b) True
8. 8.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
9. 9.🔍 Which sensor helps a robot find the brightest spot? (a) a gyro sensor (b) a light sensor (c) a touch sensor (d) a camera
10. 10.📡 Which object is hardest for an echo sensor to notice? (a) a soft foam cushion (b) a metal door (c) a flat wall (d) a wooden box
11. 11.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 21 cm (use π = 22/7). The motor turns 9 times. How far does the robot roll (in cm)?
12. 12.Which of these suits propellers? (a) a flat road (b) hovering over a roof (c) deep mud (d) a hospital corridor
13. 13.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 22/7 (b) 2/7 (c) 7/22 (d) 22
14. 14.📡 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)?
15. 15.📡 Which animal finds its way by echoes, like this sensor? (a) a goldfish (b) a cow (c) a snail (d) a bat
16. 16.🧭 A robot spins 15° every second. How many seconds does it take to turn 195°?
17. 17.🛞 How does a two-wheeled robot with no steering turn? (a) it stops for ever (b) one wheel runs faster (c) it jumps (d) it uses a sail
18. 18.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 11. What is under the sensor? (a) the black line (b) the white floor
19. 19.🔍 Which sensor helps a robot follow a black line? (a) a touch sensor (b) a temperature sensor (c) a distance sensor (d) a light sensor
20. 20.True or false: to measure a turn angle, use a temperature sensor. (a) True (b) False
21. 21.True or false: to stay balanced upright, use a gyro sensor. (a) True (b) False
22. 22.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
23. 23.⚙️ A 45-tooth driver gear turns a 15-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
24. 24.🧭 A robot spins 30° every second. How many seconds does it take to turn 180°?
25. 25.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
26. 26.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a caster wheel (b) a servo (c) a track (d) a gear
27. 27.🔍 Which sensor helps a robot spot a red ball? (a) a gyro sensor (b) a distance sensor (c) a camera (d) a touch sensor
28. 28.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 30. What is under the sensor? (a) the white floor (b) the black line
29. 29.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
30. 30.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 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
31. 31.⚙️ A 24-tooth driver gear turns an 8-tooth driven gear. The driver turns 1 time. How many times does the driven gear turn?
32. 32.🧭 A robot faces south. It does: turn around, turn right, turn right. Which way does it face now? (a) east (b) south (c) north (d) west
33. 33.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
34. 34.Which of these suits legs? (a) a long factory floor (b) stepping over wide gaps (c) a hospital corridor (d) soft snow
35. 35.True or false: “flying over a field” suits propellers. (a) False (b) True
36. 36.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) driven gear (c) idler gear (d) tyre
37. 37.True or false: “has just two wires” is true of a DC motor. (a) False (b) True
38. 38.🛞 Which way of moving suits this best: “hovering over a roof”? (a) wheels (b) legs (c) propellers (d) tracks
39. 39.📡 An object is 170 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
40. 40.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 16. What is under the sensor? (a) the white floor (b) the black line

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