Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 922 · 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.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
2. 2.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
3. 3.🔍 Which sensor helps a robot stay balanced upright? (a) a touch sensor (b) a temperature sensor (c) a gyro sensor (d) a distance sensor
4. 4.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 45. What is under the sensor? (a) the black line (b) the white floor
5. 5.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
6. 6.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
7. 7.🔍 Which sensor helps a robot start on a hand clap? (a) a camera (b) a distance sensor (c) a temperature sensor (d) a sound sensor
8. 8.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
9. 9.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times faster (b) 3 times louder (c) 3 times slower (d) 3 times bigger
10. 10.🧭 A robot faces east. It does: turn right, turn around, turn right, turn left. Which way does it face now? (a) south (b) west (c) north (d) east
11. 11.True or false: to stay balanced upright, use a gyro sensor. (a) True (b) False
12. 12.Which of these suits tracks? (a) loose sand dunes (b) a flat road (c) flying over a field (d) moving under water
13. 13.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) True (b) False
14. 14.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
15. 15.📡 A robot is 220 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 19 seconds (in cm)?
16. 16.📡 A distance sensor sends a sound pulse and hears the echo 11 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
17. 17.🦾 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 left (b) points up and right (c) points straight up (d) points up and left
18. 18.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how many full turns must they make to roll 440 cm?
19. 19.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a light sensor (c) a buzzer (d) a DC motor
20. 20.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
21. 21.🛞 A robot wheel has a diameter of 28 cm. Using π = 22/7, what is its circumference (in cm)?
22. 22.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
23. 23.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
24. 24.True or false: “a field of tall boulders” suits propellers. (a) False (b) True
25. 25.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
26. 26.📡 A distance sensor sends a sound pulse and hears the echo 1 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
27. 27.🔍 Which sensor helps a robot hear a whistle? (a) a temperature sensor (b) a light sensor (c) a sound sensor (d) a camera
28. 28.🛞 Which way of moving suits this best: “moving under water”? (a) propellers (b) tracks (c) legs (d) wheels
29. 29.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
30. 30.Which job needs a camera? (a) stay balanced upright (b) spot a red ball (c) know a button is pressed (d) measure how far a box is
31. 31.⬛ The threshold of a light sensor is … (a) the top speed (b) the wheel size (c) the battery size (d) the black/white cut-off
32. 32.🧭 A robot faces east. It does: turn right, turn around. Which way does it face now? (a) west (b) south (c) east (d) north
33. 33.True or false: to stay balanced upright, use a touch sensor. (a) False (b) True
34. 34.True or false: to stop before a wall, use a touch sensor. (a) True (b) False
35. 35.True or false: to start on a hand clap, use a sound sensor. (a) False (b) True
36. 36.⚙️ A 12-tooth driver gear turns a 36-tooth driven gear. The driver turns 24 times. How many times does the driven gear turn?
37. 37.🛞 Which way of moving suits this best: “loose sand dunes”? (a) propellers (b) wheels (c) legs (d) tracks
38. 38.📡 What does an ultrasonic distance sensor send out? (a) water drops (b) bright light (c) radio music (d) sound too high to hear
39. 39.⚙️ An 8-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
40. 40.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 360° (c) 180° (d) 45°

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