Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 16 · 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 motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 21 cm (use π = 22/7). The motor turns 2 times. How far does the robot roll (in cm)?
2. 2.🔍 Why do robots need sensors? (a) to use more power (b) to know their world (c) to be heavier (d) to look colourful
3. 3.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) an input (c) an output (d) a gear
4. 4.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) faster (b) nowhere (c) backwards (d) slower
5. 5.📡 A robot is 200 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 3 seconds (in cm)?
6. 6.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a servo motor (b) a buzzer (c) a fan (d) a DC motor
7. 7.📡 An object is 238 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
8. 8.Which of these suits legs? (a) deep mud (b) a smooth classroom floor (c) a flat road (d) stepping over wide gaps
9. 9.🔍 Which sensor helps a robot follow a black line? (a) a gyro sensor (b) a temperature sensor (c) a touch sensor (d) a light sensor
10. 10.📡 A robot is 150 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 7 seconds (in cm)?
11. 11.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 30 turns a minute and the right wheel at 60 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
12. 12.🧭 A robot faces north. It does: turn around, turn left. Which way does it face now? (a) south (b) west (c) east (d) north
13. 13.True or false: to follow a black line, use a light sensor. (a) True (b) False
14. 14.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
15. 15.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
16. 16.True or false: “a flat road” suits legs. (a) True (b) False
17. 17.Which of these suits wheels? (a) a flat road (b) crossing stepping-stones (c) deep mud (d) loose sand dunes
18. 18.🔍 What does a gyro sensor measure? (a) turning (rotation) (b) sound (c) colour (d) temperature
19. 19.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
20. 20.🔍 Which sensor helps a robot measure how far a box is? (a) a camera (b) a touch sensor (c) a gyro sensor (d) a distance sensor
21. 21.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a snail (c) a cow (d) a goldfish
22. 22.⬛ 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
23. 23.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points up and right (b) points right (c) points left (d) points straight up
24. 24.🛞 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) spins left on the spot (c) stays still (d) goes straight forward
25. 25.🛞 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) turns right (b) goes straight back (c) spins left on the spot (d) turns left
26. 26.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
27. 27.🧭 A robot faces north. It does: turn left, turn left, turn right. Which way does it face now? (a) north (b) west (c) south (d) east
28. 28.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
29. 29.🔍 Which sensor helps a robot measure a turn angle? (a) a touch sensor (b) a distance sensor (c) a sound sensor (d) a gyro sensor
30. 30.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
31. 31.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 90°. Where does the arm point? (a) points straight up (b) points up and right (c) points left (d) points up and left
32. 32.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 180° (c) 1800° (d) 18°
33. 33.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) True (b) False
34. 34.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor is stopped. What does the robot do? (a) turns right (b) spins right on the spot (c) stays still (d) goes straight back
35. 35.🦾 A servo moves from 150° to 140°. How many degrees does it turn?
36. 36.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
37. 37.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 396 cm?
38. 38.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 21 cm (use π = 22/7). The motor turns 12 times. How far does the robot roll (in cm)?
39. 39.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. The driver turns 12 times. How many times does the driven gear turn?
40. 40.⬛ The threshold of a light sensor is … (a) the wheel size (b) the battery size (c) the top speed (d) the black/white cut-off

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