Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 812 · 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.🛞 Which way of moving suits this best: “loose sand dunes”? (a) legs (b) propellers (c) tracks (d) wheels
2. 2.True or false: to stop before a wall, use a sound sensor. (a) True (b) False
3. 3.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
4. 4.True or false: to stay balanced upright, use a gyro sensor. (a) True (b) False
5. 5.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driver turns 45 times. How many times does the driven gear turn?
6. 6.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
7. 7.🔍 Which sensor helps a robot warn if motors get hot? (a) a touch sensor (b) a gyro sensor (c) a temperature sensor (d) a distance sensor
8. 8.🧭 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 90°. It turns right 180°, then left 90°, then left 60°. What does the gyro read now (0° to 359°)?
9. 9.True or false: “reverses if wires swap” is true of a DC motor. (a) True (b) False
10. 10.🧭 A robot spins 60° every second. How many seconds does it take to turn 60°?
11. 11.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 30 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
12. 12.📡 An object is 289 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
13. 13.Which of these suits legs? (a) a flat road (b) deep mud (c) loose sand dunes (d) stepping over wide gaps
14. 14.🦾 A servo program runs:
    angle = 100
    angle = angle + 10
    angle = angle + 60
    angle = angle − 60
    angle = angle + 10
    To what angle (in degrees) does the servo turn in the end?
15. 15.🧭 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 0°. It turns left 120°, then right 180°, then left 45°. What does the gyro read now (0° to 359°)?
16. 16.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
17. 17.🧭 What does a gyro help a robot do? (a) see colours (b) smell smoke (c) turn by exact angles (d) hear claps
18. 18.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 70 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
19. 19.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
20. 20.🔍 Which sensor helps a robot spot a red ball? (a) a gyro sensor (b) a distance sensor (c) a light sensor (d) a camera
21. 21.🔍 A light sensor gets the most reflected light from … (a) a dark tunnel (b) a white surface (c) a black surface (d) a black line
22. 22.True or false: to spot a red ball, use a camera. (a) True (b) False
23. 23.📡 A robot is 190 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 8 seconds (in cm)?
24. 24.🔍 What does a gyro sensor measure? (a) turning (rotation) (b) sound (c) temperature (d) colour
25. 25.⚙️ A motor makes 160 turns a minute with an 8-tooth gear on it. That gear drives a 16-tooth gear. How many turns a minute does the 16-tooth gear make?
26. 26.⚙️ How do you make a DC motor spin the other way? (a) shake it (b) swap its two wires (c) paint it red (d) add more wheels
27. 27.True or false: “holds a set angle” is true of a DC motor. (a) False (b) True
28. 28.🛞 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 left on the spot (c) goes straight back (d) goes straight forward
29. 29.🔍 Which sensor helps a robot follow a black line? (a) a gyro sensor (b) a light sensor (c) a camera (d) a distance sensor
30. 30.🦾 A servo program runs:
    angle = 110
    angle = angle − 60
    angle = angle + 10
    angle = angle + 50
    To what angle (in degrees) does the servo turn in the end?
31. 31.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
32. 32.⚙️ A 12-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
33. 33.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
34. 34.🔍 Which sensor helps a robot feel a bump into a wall? (a) a light sensor (b) a gyro sensor (c) a touch sensor (d) a temperature sensor
35. 35.Which job needs a sound sensor? (a) follow a black line (b) start on a hand clap (c) spot a red ball (d) know a button is pressed
36. 36.⚙️ A 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
37. 37.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
38. 38.🧭 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 90°. It turns right 30°, then left 30°. What does the gyro read now (0° to 359°)?
39. 39.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 5 times (in cm)?
40. 40.📡 A distance sensor sends a sound pulse and hears the echo 14 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?

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