Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 509 · 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.Which job needs a touch sensor? (a) feel a bump into a wall (b) stop before a wall (c) stay balanced upright (d) spot a red ball
2. 2.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
3. 3.🧭 A robot faces north. It does: turn around, turn right, turn around, turn left. Which way does it face now? (a) west (b) south (c) north (d) east
4. 4.Which job needs a temperature sensor? (a) find the brightest spot (b) feel a bump into a wall (c) warn if motors get hot (d) hear a whistle
5. 5.🔍 Which sensor helps a robot measure a turn angle? (a) a distance sensor (b) a touch sensor (c) a sound sensor (d) a gyro sensor
6. 6.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 46. What is under the sensor? (a) the black line (b) the white floor
7. 7.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
8. 8.🔍 Which sensor helps a robot spot a red ball? (a) a touch sensor (b) a light sensor (c) a temperature sensor (d) a camera
9. 9.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
10. 10.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times slower (b) 3 times faster (c) 3 times louder (d) 3 times bigger
11. 11.⚙️ An 8-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
12. 12.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a gear (b) a track (c) a servo (d) a caster wheel
13. 13.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
14. 14.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how far does the robot roll when the wheels turn 3 times (in cm)?
15. 15.🔍 Which sensor helps a robot follow a black line? (a) a touch sensor (b) a sound sensor (c) a gyro sensor (d) a light sensor
16. 16.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
17. 17.⚙️ How do you make a DC motor spin the other way? (a) add more wheels (b) shake it (c) paint it red (d) swap its two wires
18. 18.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) legs (b) propellers (c) wheels (d) tracks
19. 19.⚙️ An 8-tooth driver gear turns a 16-tooth driven gear. The driven gear turns 7 times. How many times did the driver turn?
20. 20.🛞 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) stays still (d) turns right
21. 21.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 37. What is under the sensor? (a) the black line (b) the white floor
22. 22.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points straight up (b) points up and right (c) points left (d) points right
23. 23.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
24. 24.True or false: “a long factory floor” suits legs. (a) True (b) False
25. 25.📡 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)?
26. 26.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
27. 27.⚙️ 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
28. 28.🧭 A robot faces south. It does: turn left, turn right, turn around. Which way does it face now? (a) north (b) south (c) west (d) east
29. 29.📡 A robot is 250 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 45 seconds (in cm)?
30. 30.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
31. 31.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a light sensor (d) a DC motor
32. 32.📡 A robot is 130 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 2 seconds (in cm)?
33. 33.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
34. 34.🛞 The diameter of a wheel is how many times its radius? (a) 4 (b) 1 (c) 3 (d) 2
35. 35.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 180° (c) 1800° (d) 10°
36. 36.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 6 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
37. 37.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 3 times (in cm)?
38. 38.🔍 Which sensor helps a robot feel a bump into a wall? (a) a light sensor (b) a touch sensor (c) a distance sensor (d) a sound sensor
39. 39.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 3 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
40. 40.Which of these suits tracks? (a) hovering over a roof (b) a long factory floor (c) moving under water (d) soft snow

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