Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 325 · 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 an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
2. 2.🧭 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 30°, then right 180°. What does the gyro read now (0° to 359°)?
3. 3.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 27. What is under the sensor? (a) the black line (b) the white floor
4. 4.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) False (b) True
5. 5.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) in opposite directions (d) the same direction
6. 6.True or false: to measure a turn angle, use a gyro sensor. (a) False (b) True
7. 7.📡 An object is 136 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
8. 8.⚙️ A motor makes 180 turns a minute with a 12-tooth gear on it. That gear drives a 36-tooth gear. How many turns a minute does the 36-tooth gear make?
9. 9.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
10. 10.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
11. 11.🔦 A light sensor reads 20 over black and 70 over white. A good threshold is halfway between them. What is it?
12. 12.🛞 Circumference = π × … (a) radius only (b) weight (c) diameter (d) speed
13. 13.Which job needs a sound sensor? (a) warn if motors get hot (b) measure a turn angle (c) start on a hand clap (d) find the brightest spot
14. 14.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
15. 15.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a light sensor (c) a servo motor (d) a buzzer
16. 16.⚙️ A 45-tooth driver gear turns a 15-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
17. 17.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
18. 18.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 180° (c) 10° (d) 1800°
19. 19.🧭 A robot faces north. It does: turn left, turn right, turn around. Which way does it face now? (a) north (b) west (c) east (d) south
20. 20.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
21. 21.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 74. What is under the sensor? (a) the black line (b) the white floor
22. 22.🔍 Which sensor helps a robot feel a bump into a wall? (a) a temperature sensor (b) a touch sensor (c) a sound sensor (d) a distance sensor
23. 23.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) between the two sensors (b) far behind it (c) under the right sensor (d) under the left sensor
24. 24.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
25. 25.True or false: to follow a black line, use a light sensor. (a) False (b) True
26. 26.📡 What does an ultrasonic distance sensor send out? (a) sound too high to hear (b) water drops (c) bright light (d) radio music
27. 27.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
28. 28.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
29. 29.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
30. 30.🧭 A robot faces east. It does: turn right, turn around, turn around. Which way does it face now? (a) north (b) south (c) east (d) west
31. 31.🧭 How many degrees is a right-angle turn? (a) 360° (b) 180° (c) 90° (d) 45°
32. 32.⚙️ A 36-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
33. 33.Which job needs a camera? (a) spot a red ball (b) measure how far a box is (c) stop before a wall (d) follow a black line
34. 34.⬛ A reading below the threshold means the sensor is over … (a) the sky (b) water (c) black (d) white
35. 35.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
36. 36.Which job needs a temperature sensor? (a) follow a black line (b) warn if motors get hot (c) stay balanced upright (d) find the brightest spot
37. 37.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 57. What is under the sensor? (a) the black line (b) the white floor
38. 38.📡 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?
39. 39.🛞 A robot wheel has a diameter of 35 cm. Using π = 22/7, what is its circumference (in cm)?
40. 40.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 2/7 (b) 22/7 (c) 22 (d) 7/22

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