Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 480 · 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 48-tooth driver gear turns a 12-tooth driven gear. The driver turns 10 times. How many times does the driven gear turn?
2. 2.🛞 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) goes straight back (c) stays still (d) goes straight forward
3. 3.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) one up, one down (c) in opposite directions (d) they do not turn
4. 4.⚙️ A 10-tooth driver gear turns a 20-tooth driven gear. The driver turns 20 times. How many times does the driven gear turn?
5. 5.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
6. 6.True or false: “moves an arm joint” is true of a servo motor. (a) False (b) True
7. 7.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
8. 8.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a DC motor (d) a light sensor
9. 9.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
10. 10.📡 What does an ultrasonic distance sensor send out? (a) water drops (b) sound too high to hear (c) bright light (d) radio music
11. 11.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
12. 12.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 10 times (in cm)?
13. 13.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) True (b) False
14. 14.🛞 Circumference = π × … (a) speed (b) weight (c) diameter (d) radius only
15. 15.⚙️ A motor changes electrical energy into … (a) movement (b) water (c) sound only (d) light
16. 16.📡 Which object is hardest for an echo sensor to notice? (a) a flat wall (b) a metal door (c) a soft foam cushion (d) a wooden box
17. 17.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
18. 18.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 32. What is under the sensor? (a) the black line (b) the white floor
19. 19.🧭 A robot should turn right 45°, but its gyro shows it turned 38°. How many degrees must it turn more to the right?
20. 20.📡 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?
21. 21.Which job needs a temperature sensor? (a) stop before a wall (b) read a QR code (c) feel a bump into a wall (d) warn if motors get hot
22. 22.True or false: “a long factory floor” suits wheels. (a) False (b) True
23. 23.🧭 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 180°, then left 90°, then right 45°. What does the gyro read now (0° to 359°)?
24. 24.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
25. 25.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
26. 26.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
27. 27.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) spins left on the spot (b) spins right on the spot (c) turns left (d) turns right
28. 28.🔍 Which sensor helps a robot measure how far a box is? (a) a temperature sensor (b) a gyro sensor (c) a distance sensor (d) a touch sensor
29. 29.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
30. 30.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) see colours (c) smell smoke (d) hear claps
31. 31.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 52. What is under the sensor? (a) the white floor (b) the black line
32. 32.True or false: to know a button is pressed, use a distance sensor. (a) True (b) False
33. 33.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 5 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
34. 34.🦾 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 right (c) points up and right (d) points left
35. 35.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
36. 36.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
37. 37.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
38. 38.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
39. 39.🛞 Which way of moving suits this best: “flying over a field”? (a) legs (b) wheels (c) tracks (d) propellers
40. 40.🔍 Which sensor helps a robot warn if motors get hot? (a) a gyro sensor (b) a touch sensor (c) a camera (d) a temperature sensor

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