Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 706 · 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.True or false: “a flat road” suits legs. (a) False (b) True
2. 2.🧭 A robot faces west. It does: turn around, turn left. Which way does it face now? (a) south (b) west (c) north (d) east
3. 3.⚙️ A 15-tooth gear drives a 30-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
4. 4.🦾 A servo moves from 0° to 60°. How many degrees does it turn?
5. 5.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
6. 6.Which job needs a distance sensor? (a) stay balanced upright (b) know a button is pressed (c) read a QR code (d) measure how far a box is
7. 7.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 62. What is under the sensor? (a) the white floor (b) the black line
8. 8.⬛ Why does a light sensor read a LOW number over a black line? (a) black is loud (b) black is wet (c) black soaks up light (d) black is hot
9. 9.True or false: “stepping over wide gaps” suits wheels. (a) True (b) False
10. 10.🧭 A robot faces west. It does: turn around, turn around, turn right. Which way does it face now? (a) south (b) north (c) east (d) west
11. 11.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
12. 12.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a touch sensor (b) a sound sensor (c) a gyro sensor (d) a camera
13. 13.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
14. 14.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) teeth (c) pins (d) spokes
15. 15.📡 An object is 170 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
16. 16.🧭 A robot spins 60° every second. How many seconds does it take to turn 360°?
17. 17.⚙️ A 10-tooth driver gear turns a 20-tooth driven gear. The driven gear turns 6 times. How many times did the driver turn?
18. 18.True or false: “a flat road” suits wheels. (a) False (b) True
19. 19.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a servo motor (b) a fan (c) a buzzer (d) a DC motor
20. 20.🛞 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) goes straight back (b) spins left on the spot (c) goes straight forward (d) stays still
21. 21.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
22. 22.🧭 How many degrees is a right-angle turn? (a) 90° (b) 45° (c) 180° (d) 360°
23. 23.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
24. 24.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 18° (c) 180° (d) 1800°
25. 25.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
26. 26.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
27. 27.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 4 (c) 1 (d) 2
28. 28.🧭 How many degrees is a full turn? (a) 360° (b) 180° (c) 100° (d) 90°
29. 29.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
30. 30.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 70 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
31. 31.🔦 A light sensor reads 30 over black and 90 over white. A good threshold is halfway between them. What is it?
32. 32.🔍 What does a gyro sensor measure? (a) colour (b) temperature (c) turning (rotation) (d) sound
33. 33.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
34. 34.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
35. 35.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times bigger (b) 3 times faster (c) 3 times louder (d) 3 times slower
36. 36.📡 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)?
37. 37.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
38. 38.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
39. 39.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
40. 40.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 39. What is under the sensor? (a) the black line (b) the white floor

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