Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 861 · 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 has a left and a right light sensor. Below 50 means black. The left sensor reads 65 and the right sensor reads 40. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) neither sensor (d) the right sensor
2. 2.True or false: to stay balanced upright, use a gyro sensor. (a) False (b) True
3. 3.True or false: “a long factory floor” suits tracks. (a) False (b) True
4. 4.🧭 A robot should turn right 90°, but its gyro shows it turned 86°. How many degrees must it turn more to the right?
5. 5.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
6. 6.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
7. 7.🧭 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 left 60°, then left 30°. What does the gyro read now (0° to 359°)?
8. 8.True or false: “a long factory floor” suits wheels. (a) True (b) False
9. 9.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
10. 10.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) driver gear (c) idler gear (d) tyre
11. 11.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
12. 12.🧭 A robot faces west. It does: turn left, turn around, turn around. Which way does it face now? (a) east (b) north (c) west (d) south
13. 13.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) big (slow and strong) (c) small (fast, weak) (d) zero
14. 14.🛞 Which way of moving suits this best: “soft snow”? (a) legs (b) wheels (c) tracks (d) propellers
15. 15.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they look funny (c) they float (d) fast and easy on floors
16. 16.🛞 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)? =
17. 17.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
18. 18.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
19. 19.⚙️ A 60-tooth driver gear turns a 12-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
20. 20.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
21. 21.📡 A distance sensor sends a sound pulse and hears the echo 8 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
22. 22.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how many full turns must they make to roll 154 cm?
23. 23.Which of these suits legs? (a) a flat road (b) crossing stepping-stones (c) moving under water (d) soft snow
24. 24.⚙️ A 40-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
25. 25.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are round (b) they spin in the air (c) they are shiny (d) they spread the weight
26. 26.🔍 For a robot’s controller, is a sensor an input or an output? (a) an output (b) a gear (c) a wheel (d) an input
27. 27.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) driver teeth (c) wheel size (d) number of gears
28. 28.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
29. 29.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 21 cm (use π = 22/7). The motor turns 10 times. How far does the robot roll (in cm)?
30. 30.🔍 What does a gyro sensor measure? (a) temperature (b) turning (rotation) (c) sound (d) colour
31. 31.🧭 A robot faces north. It does: turn right, turn left, turn around, turn left. Which way does it face now? (a) east (b) north (c) south (d) west
32. 32.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
33. 33.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 85 and the right sensor reads 10. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) neither sensor (d) the left sensor
34. 34.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
35. 35.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) wheels (b) legs (c) propellers (d) tracks
36. 36.🔍 Which sensor helps a robot follow a black line? (a) a sound sensor (b) a light sensor (c) a temperature sensor (d) a gyro sensor
37. 37.🧭 A robot spins 15° every second. How many seconds does it take to turn 15°?
38. 38.🔍 Which sensor helps a robot stop before a wall? (a) a temperature sensor (b) a touch sensor (c) a distance sensor (d) a light sensor
39. 39.🧭 A robot spins 15° every second. How many seconds does it take to turn 60°?
40. 40.⚙️ A 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?

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