Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 283 · 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 stops if an object is closer than 60 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
2. 2.Which job needs a temperature sensor? (a) feel a bump into a wall (b) stay balanced upright (c) hear a whistle (d) warn if motors get hot
3. 3.🦾 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 left (b) points left (c) points right (d) points straight up
4. 4.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
5. 5.True or false: to read a QR code, use a camera. (a) False (b) True
6. 6.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
7. 7.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) True (b) False
8. 8.⚙️ A motor changes electrical energy into … (a) movement (b) light (c) sound only (d) water
9. 9.🦾 A servo moves from 40° to 150°. How many degrees does it turn?
10. 10.🧭 How many degrees is a right-angle turn? (a) 45° (b) 360° (c) 180° (d) 90°
11. 11.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 352 cm?
12. 12.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
13. 13.📡 Why do we halve the echo’s total path? (a) it goes there and back (b) the sensor is half (c) to make it smaller (d) sound is slow
14. 14.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) tyre (c) idler gear (d) driver gear
15. 15.Which job needs a camera? (a) read a QR code (b) follow a black line (c) find the brightest spot (d) warn if motors get hot
16. 16.⚙️ How do you make a DC motor spin the other way? (a) add more wheels (b) shake it (c) paint it red (d) swap its two wires
17. 17.⚙️ A 50-tooth driver gear turns a 10-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
18. 18.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a touch sensor (b) a camera (c) a sound sensor (d) a gyro sensor
19. 19.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
20. 20.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
21. 21.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
22. 22.⚙️ An 8-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
23. 23.True or false: “reverses if wires swap” is true of a servo motor. (a) False (b) True
24. 24.🔦 A light sensor reads 10 over black and 70 over white. A good threshold is halfway between them. What is it?
25. 25.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 30 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
26. 26.🛞 A robot wheel has a diameter of 35 cm. Using π = 22/7, what is its circumference (in cm)?
27. 27.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 49. What is under the sensor? (a) the black line (b) the white floor
28. 28.🧭 How many degrees is a half turn (turn around)? (a) 45° (b) 180° (c) 360° (d) 90°
29. 29.🧭 A robot should turn right 45°, but its gyro shows it turned 42°. How many degrees must it turn more to the right?
30. 30.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor
31. 31.🧭 A robot faces west. It does: turn around, turn right, turn right. Which way does it face now? (a) west (b) east (c) north (d) south
32. 32.🔍 Which sensor helps a robot know a button is pressed? (a) a camera (b) a distance sensor (c) a touch sensor (d) a gyro sensor
33. 33.Which of these suits tracks? (a) moving under water (b) deep mud (c) stepping over wide gaps (d) a long factory floor
34. 34.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) wheel size (c) number of gears (d) driver teeth
35. 35.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
36. 36.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its radius (c) its weight (d) its circumference
37. 37.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 and the right sensor reads 10. Which sensor is over the black line? (a) both sensors (b) the left sensor (c) the right sensor (d) neither sensor
38. 38.📡 What does an ultrasonic distance sensor send out? (a) sound too high to hear (b) bright light (c) radio music (d) water drops
39. 39.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
40. 40.🔍 Which sensor helps a robot follow a black line? (a) a touch sensor (b) a sound sensor (c) a distance sensor (d) a light sensor

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids