Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 761 · 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 light sensor reads below 40 over a black line and above 40 over the white floor. It reads 56. What is under the sensor? (a) the black line (b) the white floor
2. 2.🧭 A robot faces west. It does: turn right, turn around, turn right, turn right. Which way does it face now? (a) north (b) east (c) west (d) south
3. 3.🛞 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
4. 4.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
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 runs backward. What does the robot do? (a) goes straight back (b) spins right on the spot (c) turns left (d) stays still
6. 6.🔍 Which sensor helps a robot measure a turn angle? (a) a gyro sensor (b) a touch sensor (c) a camera (d) a temperature sensor
7. 7.🧭 A robot should turn right 90°, but its gyro shows it turned 85°. How many degrees must it turn more to the right?
8. 8.⬛ The threshold of a light sensor is … (a) the black/white cut-off (b) the wheel size (c) the top speed (d) the battery size
9. 9.⚙️ A 30-tooth driver gear turns a 10-tooth driven gear. The driver turns 8 times. How many times does the driven gear turn?
10. 10.🔍 What does a gyro sensor measure? (a) colour (b) sound (c) temperature (d) turning (rotation)
11. 11.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 27. What is under the sensor? (a) the white floor (b) the black line
12. 12.🔢 Gear ratio = driven teeth ÷ … (a) driver teeth (b) motor volts (c) number of gears (d) wheel size
13. 13.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 16. What is under the sensor? (a) the white floor (b) the black line
14. 14.🛞 Which way of moving suits this best: “deep mud”? (a) legs (b) tracks (c) propellers (d) wheels
15. 15.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
16. 16.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
17. 17.Which of these suits wheels? (a) hovering over a roof (b) a long factory floor (c) soft snow (d) stepping over wide gaps
18. 18.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times bigger (b) 3 times louder (c) 3 times slower (d) 3 times faster
19. 19.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 23. What is under the sensor? (a) the white floor (b) the black line
20. 20.🔦 A light sensor reads 10 over black and 80 over white. A good threshold is halfway between them. What is it?
21. 21.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
22. 22.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 15. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) the left sensor (d) neither sensor
23. 23.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
24. 24.⚙️ A 12-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 9 times. How many times did the driver turn?
25. 25.📡 Which animal finds its way by echoes, like this sensor? (a) a goldfish (b) a bat (c) a cow (d) a snail
26. 26.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
27. 27.🧭 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 120°, then left 30°, then left 45°. What does the gyro read now (0° to 359°)?
28. 28.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 176 cm?
29. 29.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
30. 30.True or false: “a flat road” suits wheels. (a) False (b) True
31. 31.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 42. What is under the sensor? (a) the white floor (b) the black line
32. 32.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 40. What is under the sensor? (a) the black line (b) the white floor
33. 33.🧭 A robot spins 15° every second. How many seconds does it take to turn 315°?
34. 34.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 792 cm?
35. 35.🧭 A robot should turn right 180°, but its gyro shows it turned 175°. How many degrees must it turn more to the right?
36. 36.📡 Why do we halve the echo’s total path? (a) sound is slow (b) to make it smaller (c) the sensor is half (d) it goes there and back
37. 37.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they look funny (c) fast and easy on floors (d) they float
38. 38.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
39. 39.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
40. 40.🧭 How many degrees is a full turn? (a) 100° (b) 90° (c) 360° (d) 180°

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