Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 100 · 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: “stepping over wide gaps” suits tracks. (a) False (b) True
2. 2.🧭 A robot faces east. It does: turn right, turn left, turn right, turn around. Which way does it face now? (a) east (b) west (c) south (d) north
3. 3.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 176 cm?
4. 4.🔍 Which sensor helps a robot measure a turn angle? (a) a camera (b) a temperature sensor (c) a distance sensor (d) a gyro sensor
5. 5.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. The driver turns 8 times. How many times does the driven gear turn?
6. 6.⬛ Why does a light sensor read a LOW number over a black line? (a) black is hot (b) black is loud (c) black soaks up light (d) black is wet
7. 7.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor is stopped. What does the robot do? (a) goes straight forward (b) turns right (c) turns left (d) goes straight back
8. 8.🔦 A light sensor reads 40 over black and 80 over white. A good threshold is halfway between them. What is it?
9. 9.📡 An object is 170 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
10. 10.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 39. What is under the sensor? (a) the white floor (b) the black line
11. 11.🔍 Which sensor helps a robot warn if motors get hot? (a) a distance sensor (b) a touch sensor (c) a camera (d) a temperature sensor
12. 12.Which of these suits tracks? (a) a smooth classroom floor (b) a long factory floor (c) a muddy building site (d) a flat road
13. 13.⚙️ A small gear drives a big gear. The big gear turns … (a) slower but stronger (b) at the same speed (c) faster and weaker (d) not at all
14. 14.🧭 A robot spins 90° every second. How many seconds does it take to turn 360°?
15. 15.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
16. 16.🔍 Which sensor helps a robot follow a black line? (a) a light sensor (b) a sound sensor (c) a camera (d) a temperature sensor
17. 17.🛞 What is the main difficulty with legs for a robot? (a) they are too cheap (b) harder to balance (c) too fast on floors (d) they never tire
18. 18.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points left (b) points right (c) points up and right (d) points straight up
19. 19.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 10. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) the left sensor (d) neither sensor
20. 20.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how many full turns must they make to roll 330 cm?
21. 21.🧭 How many degrees is a right-angle turn? (a) 360° (b) 180° (c) 45° (d) 90°
22. 22.🧭 A robot faces north. It does: turn around, turn right. Which way does it face now? (a) east (b) west (c) south (d) north
23. 23.🧭 A robot spins 15° every second. How many seconds does it take to turn 45°?
24. 24.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 35. What is under the sensor? (a) the black line (b) the white floor
25. 25.🛞 How far does a wheel roll in one full turn? (a) its circumference (b) its diameter (c) its radius (d) its weight
26. 26.True or false: “crossing stepping-stones” suits wheels. (a) False (b) True
27. 27.🛞 Which way of moving suits this best: “a long factory floor”? (a) tracks (b) propellers (c) wheels (d) legs
28. 28.🦾 A servo program runs:
    angle = 150
    angle = angle − 50
    angle = angle − 30
    angle = angle − 20
    To what angle (in degrees) does the servo turn in the end?
29. 29.True or false: to start on a hand clap, use a sound sensor. (a) True (b) False
30. 30.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
31. 31.⚙️ A 100-tooth driver gear turns a 20-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 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
33. 33.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
34. 34.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
35. 35.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
36. 36.⚙️ 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
37. 37.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
38. 38.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) the same direction (d) in opposite directions
39. 39.📡 A robot is 180 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 1 second (in cm)?
40. 40.🧭 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 left 180°, then left 45°. What does the gyro read now (0° to 359°)?

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