Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 619 · 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’s wheels have a diameter of 35 cm. Using π = 22/7, how many full turns must they make to roll 990 cm?
2. 2.🧭 A robot keeps turning right by 60° at a time. How many turns make one full circle?
3. 3.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
4. 4.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
5. 5.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) teeth (c) tyres (d) spokes
6. 6.🧭 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 180°. It turns right 90°, then right 45°, then left 60°. What does the gyro read now (0° to 359°)?
7. 7.🧭 A robot keeps turning right by 72° at a time. How many turns make one full circle?
8. 8.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 42 cm (use π = 22/7). The motor turns 6 times. How far does the robot roll (in cm)?
9. 9.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) propellers (b) legs (c) wheels (d) tracks
10. 10.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
11. 11.🛞 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 forward. What does the robot do? (a) turns right (b) spins right on the spot (c) goes straight forward (d) spins left on the spot
12. 12.⚙️ A 10-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 30 and the right sensor reads 60. Which sensor is over the black line? (a) the left sensor (b) neither sensor (c) both sensors (d) the right sensor
14. 14.True or false: “a field of tall boulders” suits wheels. (a) True (b) False
15. 15.🔍 Which sensor helps a robot follow a black line? (a) a distance sensor (b) a gyro sensor (c) a touch sensor (d) a light sensor
16. 16.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 31. What is under the sensor? (a) the white floor (b) the black line
17. 17.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
18. 18.True or false: to spot a red ball, use a gyro sensor. (a) False (b) True
19. 19.🧭 A robot faces south. It does: turn right, turn right, turn around, turn around. Which way does it face now? (a) west (b) east (c) north (d) south
20. 20.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
21. 21.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
22. 22.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 90°?
23. 23.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
24. 24.📡 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?
25. 25.True or false: to find the brightest spot, use a temperature sensor. (a) False (b) True
26. 26.🔢 Gear ratio = driven teeth ÷ … (a) number of gears (b) motor volts (c) driver teeth (d) wheel size
27. 27.🔍 Which sensor helps a robot spot a red ball? (a) a temperature sensor (b) a camera (c) a sound sensor (d) a touch sensor
28. 28.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 21 cm (use π = 22/7). The motor turns 8 times. How far does the robot roll (in cm)?
29. 29.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
30. 30.Which of these suits tracks? (a) a smooth classroom floor (b) loose sand dunes (c) hovering over a roof (d) flying over a field
31. 31.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 18° (c) 180° (d) 10°
32. 32.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a caster wheel (b) a track (c) a servo (d) a gear
33. 33.📡 An object is 204 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
34. 34.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points right (b) points left (c) points straight up (d) points up and right
35. 35.📡 A distance sensor sends a sound pulse and hears the echo 17 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
36. 36.⚙️ An 8-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
37. 37.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
38. 38.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driver turns 15 times. How many times does the driven gear turn?
39. 39.⚙️ 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
40. 40.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?

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