Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 765 · 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.⚙️ The gear fixed to the motor is called the … (a) tyre (b) driven gear (c) driver gear (d) idler gear
2. 2.🔍 Which sensor helps a robot find the brightest spot? (a) a camera (b) a light sensor (c) a temperature sensor (d) a gyro sensor
3. 3.🧭 A robot should turn right 90°, but its gyro shows it turned 93°. How many degrees must it turn back to the left?
4. 4.Which of these suits tracks? (a) stepping over wide gaps (b) a field of tall boulders (c) a smooth classroom floor (d) soft snow
5. 5.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 44. What is under the sensor? (a) the black line (b) the white floor
6. 6.🧭 A robot should turn right 45°, but its gyro shows it turned 48°. How many degrees must it turn back to the left?
7. 7.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a track (b) a gear (c) a caster wheel (d) a servo
8. 8.True or false: “a hospital corridor” suits tracks. (a) False (b) True
9. 9.🧭 A robot spins 90° every second. How many seconds does it take to turn 90°?
10. 10.🛞 What is the main difficulty with legs for a robot? (a) harder to balance (b) too fast on floors (c) they never tire (d) they are too cheap
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 30 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
12. 12.⚙️ A 20-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
13. 13.🔍 A light sensor gets the most reflected light from … (a) a black surface (b) a black line (c) a white surface (d) a dark tunnel
14. 14.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 7 cm (use π = 22/7). The motor turns 12 times. How far does the robot roll (in cm)?
15. 15.🛞 How does a two-wheeled robot with no steering turn? (a) it uses a sail (b) it stops for ever (c) it jumps (d) one wheel runs faster
16. 16.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) between the two sensors (b) far behind it (c) under the right sensor (d) under the left sensor
17. 17.⚙️ A 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 1 time. How many times does the driven gear turn?
18. 18.🧭 A robot faces west. It does: turn right, turn left, turn left. Which way does it face now? (a) west (b) east (c) south (d) north
19. 19.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 35. What is under the sensor? (a) the black line (b) the white floor
20. 20.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 50. What is under the sensor? (a) the black line (b) the white floor
21. 21.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 56. What is under the sensor? (a) the white floor (b) the black line
22. 22.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driver turns 15 times. How many times does the driven gear turn?
23. 23.⚙️ A 10-tooth driver gear turns a 30-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
24. 24.🛞 Which way of moving suits this best: “soft snow”? (a) propellers (b) tracks (c) wheels (d) legs
25. 25.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) tyres (c) teeth (d) pins
26. 26.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
27. 27.🦾 A servo moves from 110° to 130°. How many degrees does it turn?
28. 28.🔦 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) both sensors (b) neither sensor (c) the left sensor (d) the right sensor
29. 29.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
30. 30.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
31. 31.🧭 A robot should turn right 90°, but its gyro shows it turned 89°. How many degrees must it turn more to the right?
32. 32.🔦 A light sensor reads 20 over black and 60 over white. A good threshold is halfway between them. What is it?
33. 33.🔍 Which sensor helps a robot stay balanced upright? (a) a distance sensor (b) a temperature sensor (c) a sound sensor (d) a gyro sensor
34. 34.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
35. 35.🦾 A servo program runs:
    angle = 20
    angle = angle − 20
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
36. 36.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
37. 37.Which job needs a distance sensor? (a) find the brightest spot (b) know a button is pressed (c) stop before a wall (d) hear a whistle
38. 38.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
39. 39.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a touch sensor (b) a sound sensor (c) a camera (d) a gyro sensor
40. 40.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 37. What is under the sensor? (a) the white floor (b) the black line

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