← Part 2 test: how robots move and sense lesson New set →

Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 410 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🦾 A servo program runs:
    angle = 110
    angle = angle − 10
    angle = angle − 60
    angle = angle + 10
    angle = angle + 30
    To what angle (in degrees) does the servo turn in the end?
  2. 2.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 15 times. How far does the robot roll (in cm)?
  3. 3.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 35. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) the left sensor (d) neither sensor
  4. 4.⚙️ A 20-tooth driver gear turns a 100-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
  5. 5.⚙️ A motor makes 20 turns a minute with a 15-tooth gear on it. That gear drives a 30-tooth gear. How many turns a minute does the 30-tooth gear make?
  6. 6.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
  7. 7.🔍 For a robot’s controller, is a sensor an input or an output? (a) a gear (b) an output (c) a wheel (d) an input
  8. 8.⚙️ A motor makes 250 turns a minute with a 10-tooth gear on it. That gear drives a 50-tooth gear. How many turns a minute does the 50-tooth gear make?
  9. 9.🔍 Which sensor helps a robot know a button is pressed? (a) a touch sensor (b) a distance sensor (c) a temperature sensor (d) a camera
  10. 10.🧭 What does a gyro help a robot do? (a) hear claps (b) turn by exact angles (c) smell smoke (d) see colours
  11. 11.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 8 times (in cm)?
  12. 12.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they spread the weight (c) they spin in the air (d) they are round
  13. 13.⚙️ A 100-tooth driver gear turns a 20-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
  14. 14.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driven gear turns 6 times. How many times did the driver turn?
  15. 15.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
  16. 16.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
  17. 17.🛞 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) goes straight back (b) turns left (c) goes straight forward (d) spins right on the spot
  18. 18.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
  19. 19.⚙️ A 12-tooth gear drives a 60-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
  20. 20.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
  21. 21.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 180°. Where does the arm point? (a) points up and right (b) points right (c) points up and left (d) points left
  22. 22.📡 A distance sensor sends a sound pulse and hears the echo 13 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
  23. 23.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 43. What is under the sensor? (a) the white floor (b) the black line
  24. 24.🛞 Which way of moving suits this best: “hovering over a roof”? (a) wheels (b) tracks (c) legs (d) propellers
  25. 25.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driver turns 12 times. How many times does the driven gear turn?
  26. 26.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 34 cm (b) 1 km (c) 3 cm (d) 340 cm
  27. 27.🦾 A servo moves from 130° to 110°. How many degrees does it turn?
  28. 28.⚙️ An 8-tooth gear drives a 32-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
  29. 29.🧭 How many degrees is a half turn (turn around)? (a) 45° (b) 90° (c) 180° (d) 360°
  30. 30.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 9 times. How far does the robot roll (in cm)?
  31. 31.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) zero (c) small (fast, weak) (d) big (slow and strong)
  32. 32.🧭 A robot should turn right 45°, but its gyro shows it turned 58°. How many degrees must it turn back to the left?
  33. 33.⚙️ How do you make a DC motor spin the other way? (a) shake it (b) swap its two wires (c) add more wheels (d) paint it red
  34. 34.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 264 cm?
  35. 35.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
  36. 36.⬛ A reading below the threshold means the sensor is over … (a) water (b) white (c) the sky (d) black
  37. 37.🔦 A light sensor reads 20 over black and 90 over white. A good threshold is halfway between them. What is it?
  38. 38.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 176 cm?
  39. 39.⚙️ A motor makes 160 turns a minute with a 10-tooth gear on it. That gear drives a 20-tooth gear. How many turns a minute does the 20-tooth gear make?
  40. 40.🛞 What is the main difficulty with legs for a robot? (a) too fast on floors (b) they are too cheap (c) they never tire (d) harder to balance

Answer key

  1. 80
  2. 550
  3. the right sensor
  4. 10
  5. 10
  6. 10
  7. an input
  8. 50
  9. a touch sensor
  10. turn by exact angles
  11. 528
  12. they spread the weight
  13. 10
  14. 18
  15. No
  16. Yes
  17. turns left
  18. No
  19. 5
  20. True
  21. points left
  22. 221
  23. the black line
  24. propellers
  25. 4
  26. 34 cm
  27. 20
  28. 4
  29. 180°
  30. 330
  31. big (slow and strong)
  32. 13
  33. swap its two wires
  34. 4
  35. curves to the left
  36. black
  37. 55
  38. 2
  39. 80
  40. harder to balance

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