Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 789 · 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.🛞 Circumference = π × … (a) weight (b) radius only (c) diameter (d) speed
2. 2.🛞 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)? =
3. 3.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
4. 4.🧭 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 135°, then right 90°. What does the gyro read now (0° to 359°)?
5. 5.🦾 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 up and right (b) points right (c) points left (d) points straight up
6. 6.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
7. 7.📡 An object is 17 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
8. 8.🔍 Which sensor helps a robot know a button is pressed? (a) a touch sensor (b) a light sensor (c) a camera (d) a sound sensor
9. 9.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
10. 10.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 34 cm (c) 1 km (d) 340 cm
11. 11.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
12. 12.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor runs backward. What does the robot do? (a) spins right on the spot (b) goes straight back (c) spins left on the spot (d) turns right
13. 13.📡 What does an ultrasonic distance sensor send out? (a) water drops (b) sound too high to hear (c) radio music (d) bright light
14. 14.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
15. 15.🛞 How does a two-wheeled robot with no steering turn? (a) it jumps (b) one wheel runs faster (c) it uses a sail (d) it stops for ever
16. 16.Which job needs a temperature sensor? (a) know a button is pressed (b) warn if motors get hot (c) follow a black line (d) stop before a wall
17. 17.📡 Why do we halve the echo’s total path? (a) sound is slow (b) it goes there and back (c) the sensor is half (d) to make it smaller
18. 18.🛞 The diameter of a wheel is how many times its radius? (a) 1 (b) 2 (c) 3 (d) 4
19. 19.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) under the left sensor (b) far behind it (c) between the two sensors (d) under the right sensor
20. 20.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
21. 21.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
22. 22.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) propellers (b) wheels (c) legs (d) tracks
23. 23.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
24. 24.🛞 How far does a wheel roll in one full turn? (a) its weight (b) its radius (c) its circumference (d) its diameter
25. 25.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
26. 26.Which of these suits propellers? (a) a long factory floor (b) a smooth classroom floor (c) soft snow (d) moving under water
27. 27.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 60 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
28. 28.🧭 A robot faces north. It does: turn right, turn right, turn left. Which way does it face now? (a) east (b) south (c) west (d) north
29. 29.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 4 times. How many times did the driver turn?
30. 30.🛞 Which way of moving suits this best: “deep mud”? (a) tracks (b) wheels (c) propellers (d) legs
31. 31.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
32. 32.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
33. 33.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
34. 34.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
35. 35.⚙️ A 12-tooth driver gear turns a 60-tooth driven gear. The driver turns 45 times. How many times does the driven gear turn?
36. 36.📡 A robot is 280 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 16 seconds (in cm)?
37. 37.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
38. 38.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 8 times. How many times did the driver turn?
39. 39.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 90 and the right sensor reads 25. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) neither sensor (d) the right sensor
40. 40.📡 An object is 340 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?

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