Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 396 · 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 spins 45° every second. How many seconds does it take to turn 135°?
2. 2.📡 What does an ultrasonic distance sensor send out? (a) bright light (b) water drops (c) sound too high to hear (d) radio music
3. 3.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 85. Which sensor is over the black line? (a) the right sensor (b) neither sensor (c) the left sensor (d) both sensors
4. 4.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 1 km (b) 340 cm (c) 3 cm (d) 34 cm
5. 5.🧭 What does a gyro help a robot do? (a) hear claps (b) turn by exact angles (c) see colours (d) smell smoke
6. 6.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
7. 7.Which job needs a touch sensor? (a) feel a bump into a wall (b) read a QR code (c) start on a hand clap (d) spot a red ball
8. 8.Which of these suits tracks? (a) a flat road (b) soft snow (c) a field of tall boulders (d) crossing stepping-stones
9. 9.Which job needs a gyro sensor? (a) measure a turn angle (b) hear a whistle (c) read a QR code (d) stop before a wall
10. 10.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 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 left (c) curves to the right
11. 11.True or false: “spins faster with more V” is true of a servo motor. (a) False (b) True
12. 12.⚙️ An 8-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
13. 13.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
14. 14.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
15. 15.📡 A distance sensor sends a sound pulse and hears the echo 14 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
16. 16.📡 An object is 102 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
17. 17.🧭 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 270°. It turns right 120°, then right 90°, then right 120°. What does the gyro read now (0° to 359°)?
18. 18.🛞 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) turns left (b) goes straight back (c) spins right on the spot (d) turns right
19. 19.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs backward. What does the robot do? (a) turns right (b) goes straight forward (c) turns left (d) goes straight back
20. 20.⚙️ A motor makes 550 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?
21. 21.🔍 Which sensor helps a robot read a QR code? (a) a light sensor (b) a touch sensor (c) a camera (d) a distance sensor
22. 22.📡 Why do we halve the echo’s total path? (a) sound is slow (b) to make it smaller (c) the sensor is half (d) it goes there and back
23. 23.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
24. 24.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) legs (b) tracks (c) wheels (d) propellers
25. 25.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
26. 26.🛞 Circumference = π × … (a) speed (b) diameter (c) radius only (d) weight
27. 27.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
28. 28.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a servo motor (c) a DC motor (d) a buzzer
29. 29.🦾 A servo moves from 20° to 90°. How many degrees does it turn?
30. 30.⚙️ A 24-tooth driver gear turns an 8-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
31. 31.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
32. 32.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) tyre (c) driver gear (d) idler gear
33. 33.Which job needs a sound sensor? (a) hear a whistle (b) measure how far a box is (c) stay balanced upright (d) know a button is pressed
34. 34.🧭 A robot spins 15° every second. How many seconds does it take to turn 105°?
35. 35.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
36. 36.⚙️ A 12-tooth driver gear turns a 48-tooth driven gear. The driver turns 28 times. How many times does the driven gear turn?
37. 37.⚙️ An 8-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 9 times. How many times did the driver turn?
38. 38.True or false: “a muddy building site” suits wheels. (a) False (b) True
39. 39.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs forward. What does the robot do? (a) turns right (b) turns left (c) spins left on the spot (d) goes straight forward
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 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

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