Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 108 · 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.🧭 How many degrees is a right-angle turn? (a) 360° (b) 90° (c) 180° (d) 45°
2. 2.🧭 A robot spins 30° every second. How many seconds does it take to turn 240°?
3. 3.True or false: to stop before a wall, use a distance sensor. (a) False (b) True
4. 4.🛞 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) spins right on the spot (b) goes straight back (c) turns right (d) turns left
5. 5.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
6. 6.Which of these suits propellers? (a) a flat road (b) a field of tall boulders (c) a long factory floor (d) hovering over a roof
7. 7.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) zero (b) big (slow and strong) (c) never important (d) small (fast, weak)
8. 8.Which of these suits legs? (a) moving under water (b) a muddy building site (c) crossing stepping-stones (d) flying over a field
9. 9.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 90°. Where does the arm point? (a) points up and left (b) points straight up (c) points right (d) points left
10. 10.🧭 A robot spins 90° every second. How many seconds does it take to turn 360°?
11. 11.🛞 Which way of moving suits this best: “stepping over wide gaps”? (a) legs (b) wheels (c) propellers (d) tracks
12. 12.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
13. 13.🛞 Circumference = π × … (a) diameter (b) speed (c) radius only (d) weight
14. 14.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
15. 15.🔍 For a robot’s controller, is a sensor an input or an output? (a) a gear (b) an input (c) an output (d) a wheel
16. 16.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a touch sensor (b) a camera (c) a sound sensor (d) a gyro sensor
17. 17.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
18. 18.🔍 Which sensor helps a robot feel a bump into a wall? (a) a temperature sensor (b) a gyro sensor (c) a touch sensor (d) a sound sensor
19. 19.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
20. 20.⚙️ A motor makes 40 turns a minute with an 8-tooth gear on it. That gear drives a 32-tooth gear. How many turns a minute does the 32-tooth gear make?
21. 21.⬛ Why does a light sensor read a LOW number over a black line? (a) black is wet (b) black is loud (c) black is hot (d) black soaks up light
22. 22.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) faster and weaker (c) not at all (d) slower but stronger
23. 23.True or false: to read a QR code, use a camera. (a) False (b) True
24. 24.🛞 Which way of moving suits this best: “a muddy building site”? (a) tracks (b) propellers (c) wheels (d) legs
25. 25.🛞 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) turns right (b) turns left (c) stays still (d) goes straight back
26. 26.🛞 Which way of moving suits this best: “loose sand dunes”? (a) legs (b) propellers (c) tracks (d) wheels
27. 27.⚙️ A 15-tooth driver gear turns a 75-tooth driven gear. The driven gear turns 1 time. How many times did the driver turn?
28. 28.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
29. 29.⚙️ How do you make a DC motor spin the other way? (a) paint it red (b) shake it (c) add more wheels (d) swap its two wires
30. 30.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how many full turns must they make to roll 880 cm?
31. 31.📡 A distance sensor sends a sound pulse and hears the echo 16 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
32. 32.Which job needs a camera? (a) measure a turn angle (b) warn if motors get hot (c) read a QR code (d) know a button is pressed
33. 33.True or false: “a hospital corridor” suits legs. (a) True (b) False
34. 34.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
35. 35.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) slower (b) nowhere (c) faster (d) backwards
36. 36.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 63. What is under the sensor? (a) the black line (b) the white floor
37. 37.⚙️ 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 small driver gear (b) a big driver gear
38. 38.🔍 Which sensor helps a robot warn if motors get hot? (a) a gyro sensor (b) a temperature sensor (c) a distance sensor (d) a light sensor
39. 39.True or false: “a hospital corridor” suits wheels. (a) False (b) True
40. 40.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they look funny (c) they float (d) fast and easy on floors

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