Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 553 · 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 robot’s gyro reads 0° when it faces north and counts up to 359° as it turns right (east is 90°). It starts at 0°. It turns right 30°, then left 90°. What does the gyro read now (0° to 359°)?
2. 2.📡 An object is 51 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
3. 3.🔍 Which sensor helps a robot find the brightest spot? (a) a light sensor (b) a distance sensor (c) a touch sensor (d) a camera
4. 4.📡 A distance sensor sends a sound pulse and hears the echo 10 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
5. 5.⚙️ An 80-tooth driver gear turns a 20-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
6. 6.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) never important (c) zero (d) big (slow and strong)
7. 7.⚙️ A 12-tooth gear drives a 36-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
8. 8.🧭 A robot faces east. It does: turn around, turn right. Which way does it face now? (a) west (b) east (c) north (d) south
9. 9.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
10. 10.🛞 Which way of moving suits this best: “a flat road”? (a) propellers (b) legs (c) tracks (d) wheels
11. 11.⚙️ A 12-tooth gear drives a 48-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
12. 12.📡 Why do we halve the echo’s total path? (a) to make it smaller (b) the sensor is half (c) sound is slow (d) it goes there and back
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 85. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the right sensor (d) the left sensor
14. 14.⚙️ A 10-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
15. 15.🛞 Which way of moving suits this best: “flying over a field”? (a) legs (b) wheels (c) tracks (d) propellers
16. 16.⚙️ A 30-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
17. 17.🛞 Which way of moving suits this best: “stepping over wide gaps”? (a) propellers (b) wheels (c) tracks (d) legs
18. 18.🧭 A robot should turn right 90°, but its gyro shows it turned 84°. How many degrees must it turn more to the right?
19. 19.🔍 Which sensor helps a robot know a button is pressed? (a) a camera (b) a touch sensor (c) a temperature sensor (d) a sound sensor
20. 20.Which job needs a gyro sensor? (a) warn if motors get hot (b) stay balanced upright (c) hear a whistle (d) start on a hand clap
21. 21.⚙️ A motor makes 80 turns a minute with a 10-tooth gear on it. That gear drives a 40-tooth gear. How many turns a minute does the 40-tooth gear make?
22. 22.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
23. 23.🧭 A robot spins 60° every second. How many seconds does it take to turn 240°?
24. 24.🦾 A servo program runs:
    angle = 180
    angle = angle − 20
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
25. 25.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times louder (b) 3 times bigger (c) 3 times slower (d) 3 times faster
26. 26.🛞 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)? =
27. 27.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
28. 28.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 135°. Where does the arm point? (a) points up and left (b) points right (c) points up and right (d) points straight up
29. 29.True or false: to warn if motors get hot, use a temperature sensor. (a) True (b) False
30. 30.True or false: to find the brightest spot, use a touch sensor. (a) True (b) False
31. 31.🦾 A servo moves from 120° to 0°. How many degrees does it turn?
32. 32.🔍 Which sensor helps a robot stop before a wall? (a) a touch sensor (b) a light sensor (c) a camera (d) a distance sensor
33. 33.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 30 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
34. 34.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
35. 35.True or false: “stepping over wide gaps” suits legs. (a) True (b) False
36. 36.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 23. What is under the sensor? (a) the black line (b) the white floor
37. 37.🦾 A servo moves from 140° to 180°. How many degrees does it turn?
38. 38.🦾 A servo program runs:
    angle = 30
    angle = angle − 10
    angle = angle + 60
    angle = angle − 20
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
39. 39.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
40. 40.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?

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