Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 9 · 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 small free-turning wheel that only helps a robot balance is called … (a) a track (b) a caster wheel (c) a servo (d) a gear
2. 2.📡 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?
3. 3.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
4. 4.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 66. What is under the sensor? (a) the black line (b) the white floor
5. 5.📡 A robot is 220 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 3 seconds (in cm)?
6. 6.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
7. 7.⚙️ An 8-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
8. 8.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 10. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the left sensor (d) the right sensor
9. 9.🛞 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) turns left (b) spins left on the spot (c) spins right on the spot (d) stays still
10. 10.🧭 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 left 90°, then left 135°. What does the gyro read now (0° to 359°)?
11. 11.Which job needs a touch sensor? (a) know a button is pressed (b) start on a hand clap (c) measure how far a box is (d) stay balanced upright
12. 12.🔍 Which sensor helps a robot stop before a wall? (a) a temperature sensor (b) a distance sensor (c) a gyro sensor (d) a camera
13. 13.🔍 For a robot’s controller, is a sensor an input or an output? (a) an output (b) an input (c) a wheel (d) a gear
14. 14.🧭 How many degrees is a right-angle turn? (a) 90° (b) 180° (c) 45° (d) 360°
15. 15.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
16. 16.Which of these suits tracks? (a) a long factory floor (b) stepping over wide gaps (c) deep mud (d) a hospital corridor
17. 17.🧭 A robot keeps turning right by 72° at a time. How many turns make one full circle?
18. 18.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a sound sensor (b) a gyro sensor (c) a camera (d) a touch sensor
19. 19.⚙️ 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
20. 20.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
21. 21.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
22. 22.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
23. 23.🧭 A robot spins 60° every second. How many seconds does it take to turn 60°?
24. 24.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
25. 25.🧭 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 45°. What does the gyro read now (0° to 359°)?
26. 26.True or false: to start on a hand clap, use a sound sensor. (a) False (b) True
27. 27.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
28. 28.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how many full turns must they make to roll 110 cm?
29. 29.📡 An object is 255 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
30. 30.🧭 A robot spins 90° every second. How many seconds does it take to turn 180°?
31. 31.🛞 Circumference = π × … (a) speed (b) radius only (c) weight (d) diameter
32. 32.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
33. 33.🔍 Which sensor helps a robot warn if motors get hot? (a) a sound sensor (b) a light sensor (c) a touch sensor (d) a temperature sensor
34. 34.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
35. 35.🧭 A robot spins 45° every second. How many seconds does it take to turn 90°?
36. 36.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 34. What is under the sensor? (a) the white floor (b) the black line
37. 37.Which of these suits wheels? (a) loose sand dunes (b) a smooth classroom floor (c) a field of tall boulders (d) flying over a field
38. 38.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
39. 39.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
40. 40.True or false: to hear a whistle, use a light sensor. (a) True (b) False

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