Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 749 · 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 36-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
2. 2.⚙️ A 50-tooth driver gear turns a 10-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
3. 3.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a caster wheel (b) a gear (c) a servo (d) a track
4. 4.📡 A robot is 170 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 13 seconds (in cm)?
5. 5.🦾 A servo moves from 40° to 170°. How many degrees does it turn?
6. 6.🛞 How does a two-wheeled robot with no steering turn? (a) it stops for ever (b) one wheel runs faster (c) it jumps (d) it uses a sail
7. 7.True or false: “drives the wheels” is true of a DC motor. (a) True (b) False
8. 8.🦾 A servo program runs:
   angle = 100
   angle = angle − 30
   angle = angle + 30
   angle = angle − 40
   angle = angle − 10
   To what angle (in degrees) does the servo turn in the end?
9. 9.Which of these suits propellers? (a) soft snow (b) a flat road (c) stepping over wide gaps (d) hovering over a roof
10. 10.🔍 For a robot’s controller, is a sensor an input or an output? (a) an input (b) a wheel (c) a gear (d) an output
11. 11.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 30 and the right sensor reads 30. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
12. 12.🛞 Which way of moving suits this best: “a muddy building site”? (a) legs (b) propellers (c) tracks (d) wheels
13. 13.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
14. 14.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
15. 15.🛞 A robot wheel has a diameter of 28 cm. Using π = 22/7, what is its circumference (in cm)?
16. 16.⚙️ A 15-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
17. 17.🧭 A robot spins 15° every second. How many seconds does it take to turn 15°?
18. 18.⚙️ A motor makes 600 turns a minute with a 12-tooth gear on it. That gear drives a 60-tooth gear. How many turns a minute does the 60-tooth gear make?
19. 19.🧭 A robot spins 90° every second. How many seconds does it take to turn 180°?
20. 20.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 and the right sensor reads 10. Which sensor is over the black line? (a) the left sensor (b) neither sensor (c) the right sensor (d) both sensors
21. 21.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
22. 22.⚙️ An 8-tooth driver gear turns a 40-tooth driven gear. The driver turns 35 times. How many times does the driven gear turn?
23. 23.Which of these suits wheels? (a) a field of tall boulders (b) moving under water (c) crossing stepping-stones (d) a long factory floor
24. 24.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
25. 25.🦾 A servo moves from 160° to 30°. How many degrees does it turn?
26. 26.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
27. 27.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 30 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
28. 28.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
29. 29.⚙️ A 20-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
30. 30.⚙️ A 10-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
31. 31.🛞 A robot wheel has a diameter of 35 cm. Using π = 22/7, what is its circumference (in cm)?
32. 32.🧭 A robot’s gyro reads 0° when it faces north and counts up to 359° as it turns right (east is 90°). It starts at 180°. It turns left 135°, then left 180°, then left 180°. What does the gyro read now (0° to 359°)?
33. 33.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 360° (c) 180° (d) 45°
34. 34.🧭 A robot spins 30° every second. How many seconds does it take to turn 180°?
35. 35.🛞 Which way of moving suits this best: “a long factory floor”? (a) wheels (b) propellers (c) legs (d) tracks
36. 36.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
37. 37.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
38. 38.⚙️ A 12-tooth driver gear turns a 48-tooth driven gear. The driver turns 32 times. How many times does the driven gear turn?
39. 39.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 35 and the right sensor reads 90. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) neither sensor (d) the right sensor

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