Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 505 · 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 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
2. 2.🔍 What does a gyro sensor measure? (a) sound (b) turning (rotation) (c) temperature (d) colour
3. 3.Which of these suits propellers? (a) flying over a field (b) soft snow (c) loose sand dunes (d) a long factory floor
4. 4.Which of these suits propellers? (a) loose sand dunes (b) a long factory floor (c) moving under water (d) a smooth classroom floor
5. 5.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 67. What is under the sensor? (a) the black line (b) the white floor
6. 6.⬛ The threshold of a light sensor is … (a) the battery size (b) the black/white cut-off (c) the top speed (d) the wheel size
7. 7.🧭 A robot should turn right 90°, but its gyro shows it turned 100°. How many degrees must it turn back to the left?
8. 8.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a buzzer (b) a DC motor (c) a fan (d) a servo motor
9. 9.🔍 Which sensor helps a robot measure how far a box is? (a) a light sensor (b) a distance sensor (c) a gyro sensor (d) a temperature sensor
10. 10.🔦 A light sensor reads 40 over black and 80 over white. A good threshold is halfway between them. What is it?
11. 11.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
12. 12.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 1 km (c) 340 cm (d) 34 cm
13. 13.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 47. What is under the sensor? (a) the white floor (b) the black line
14. 14.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
15. 15.⚙️ A 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 1 time. How many times does the driven gear turn?
16. 16.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
17. 17.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs backward. What does the robot do? (a) goes straight forward (b) spins left on the spot (c) goes straight back (d) spins right on the spot
18. 18.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
19. 19.🦾 A servo program runs:
    angle = 20
    angle = angle − 20
    angle = angle + 50
    angle = angle − 20
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
20. 20.🛞 Which way of moving suits this best: “flying over a field”? (a) wheels (b) legs (c) propellers (d) tracks
21. 21.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
22. 22.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
23. 23.🛞 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)?
24. 24.🛞 Which way of moving suits this best: “soft snow”? (a) wheels (b) tracks (c) propellers (d) legs
25. 25.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spin in the air (b) they spread the weight (c) they are round (d) they are shiny
26. 26.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
27. 27.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
28. 28.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 10 times (in cm)?
29. 29.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
30. 30.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 42. What is under the sensor? (a) the white floor (b) the black line
31. 31.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they float (c) they look funny (d) fast and easy on floors
32. 32.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 70. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) both sensors (d) the left sensor
33. 33.⚙️ A 36-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
34. 34.🦾 A servo moves from 0° to 150°. How many degrees does it turn?
35. 35.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) False (b) True
36. 36.🧭 What does a gyro help a robot do? (a) smell smoke (b) turn by exact angles (c) hear claps (d) see colours
37. 37.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
38. 38.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
39. 39.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) the same direction (c) in opposite directions (d) they do not turn
40. 40.Which job needs a light sensor? (a) feel a bump into a wall (b) follow a black line (c) warn if motors get hot (d) know a button is pressed

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