Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 186 · 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.True or false: to measure how far a box is, use a distance sensor. (a) False (b) True
2. 2.🛞 Which way of moving suits this best: “deep mud”? (a) tracks (b) propellers (c) wheels (d) legs
3. 3.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) True (b) False
4. 4.🔍 Which sensor helps a robot hear a whistle? (a) a sound sensor (b) a touch sensor (c) a distance sensor (d) a light sensor
5. 5.True or false: to warn if motors get hot, use a temperature sensor. (a) False (b) True
6. 6.🧭 How many degrees is a full turn? (a) 100° (b) 180° (c) 90° (d) 360°
7. 7.Which job needs a light sensor? (a) spot a red ball (b) measure a turn angle (c) warn if motors get hot (d) find the brightest spot
8. 8.🛞 What is the main difficulty with legs for a robot? (a) harder to balance (b) they never tire (c) too fast on floors (d) they are too cheap
9. 9.True or false: “holds a set angle” is true of a servo motor. (a) False (b) True
10. 10.🛞 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 forward. What does the robot do? (a) stays still (b) turns left (c) spins right on the spot (d) goes straight forward
11. 11.⬛ A reading below the threshold means the sensor is over … (a) black (b) white (c) the sky (d) water
12. 12.🔍 What does a gyro sensor measure? (a) turning (rotation) (b) sound (c) colour (d) temperature
13. 13.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 180°. Where does the arm point? (a) points up and left (b) points right (c) points left (d) points straight up
14. 14.True or false: to read a QR code, use a sound sensor. (a) True (b) False
15. 15.🔍 Which sensor helps a robot stay balanced upright? (a) a sound sensor (b) a touch sensor (c) a gyro sensor (d) a light sensor
16. 16.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
17. 17.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 3 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
18. 18.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) tracks (b) legs (c) wheels (d) propellers
19. 19.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
20. 20.🦾 A servo moves from 0° to 160°. How many degrees does it turn?
21. 21.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 3 times. How far does the robot roll (in cm)?
22. 22.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
23. 23.📡 A robot is 250 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 11 seconds (in cm)?
24. 24.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) between the two sensors (b) under the left sensor (c) far behind it (d) under the right sensor
25. 25.⬛ Why does a light sensor read a LOW number over a black line? (a) black soaks up light (b) black is loud (c) black is wet (d) black is hot
26. 26.🔍 Why do robots need sensors? (a) to use more power (b) to be heavier (c) to look colourful (d) to know their world
27. 27.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) an output (c) an input (d) a gear
28. 28.True or false: “flying over a field” suits wheels. (a) True (b) False
29. 29.🛞 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) stays still (b) turns left (c) spins left on the spot (d) spins right on the spot
30. 30.🧭 How many degrees is a right-angle turn? (a) 90° (b) 360° (c) 180° (d) 45°
31. 31.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 10 times. How many times does the driven gear turn?
32. 32.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
33. 33.🛞 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) spins left on the spot (b) goes straight back (c) spins right on the spot (d) turns right
34. 34.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?
35. 35.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
36. 36.Which of these suits legs? (a) a long factory floor (b) a hospital corridor (c) a flat road (d) crossing stepping-stones
37. 37.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
38. 38.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 60. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) the left sensor (d) neither sensor
39. 39.🔍 Which sensor helps a robot know a button is pressed? (a) a light sensor (b) a sound sensor (c) a camera (d) a touch sensor
40. 40.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how many full turns must they make to roll 1188 cm?

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