Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 192 · 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 of these suits propellers? (a) a field of tall boulders (b) crossing stepping-stones (c) a long factory floor (d) flying over a field
2. 2.📡 What does an ultrasonic distance sensor send out? (a) water drops (b) bright light (c) sound too high to hear (d) radio music
3. 3.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
4. 4.🦾 A servo program runs:
   angle = 100
   angle = angle − 60
   angle = angle − 20
   angle = angle + 60
   angle = angle + 10
   To what angle (in degrees) does the servo turn in the end?
5. 5.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times bigger (b) 3 times faster (c) 3 times louder (d) 3 times slower
6. 6.🧭 A robot should turn right 90°, but its gyro shows it turned 88°. How many degrees must it turn more to the right?
7. 7.🧭 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 left 30°, then right 60°, then left 45°. What does the gyro read now (0° to 359°)?
8. 8.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
9. 9.⚙️ An 8-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
10. 10.⚙️ 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
11. 11.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points right (b) points up and left (c) points left (d) points straight up
12. 12.⚙️ A motor changes electrical energy into … (a) light (b) water (c) movement (d) sound only
13. 13.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
14. 14.🧭 A robot should turn right 45°, but its gyro shows it turned 41°. How many degrees must it turn more to the right?
15. 15.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) zero (b) never important (c) small (fast, weak) (d) big (slow and strong)
16. 16.Which job needs a touch sensor? (a) hear a whistle (b) measure how far a box is (c) know a button is pressed (d) stop before a wall
17. 17.True or false: to warn if motors get hot, use a temperature sensor. (a) True (b) False
18. 18.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 60. What is under the sensor? (a) the black line (b) the white floor
19. 19.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
20. 20.🧭 How many degrees is a full turn? (a) 360° (b) 90° (c) 180° (d) 100°
21. 21.🔍 Which sensor helps a robot feel a bump into a wall? (a) a camera (b) a touch sensor (c) a distance sensor (d) a sound sensor
22. 22.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
23. 23.🔍 Which sensor helps a robot spot a red ball? (a) a camera (b) a distance sensor (c) a touch sensor (d) a temperature sensor
24. 24.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs forward. What does the robot do? (a) goes straight forward (b) spins left on the spot (c) turns left (d) goes straight back
25. 25.True or false: “the output is stronger” happens when a big gear drives a small one. (a) True (b) False
26. 26.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 4 (c) 1 (d) 2
27. 27.🛞 Which way of moving suits this best: “a long factory floor”? (a) tracks (b) legs (c) wheels (d) propellers
28. 28.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
29. 29.📡 An object is 102 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 has a left and a right light sensor. Below 50 means black. The left sensor reads 70 and the right sensor reads 35. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the left sensor (d) the right sensor
31. 31.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 10. Which sensor is over the black line? (a) the right sensor (b) neither sensor (c) the left sensor (d) both sensors
32. 32.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
33. 33.True or false: “loose sand dunes” suits tracks. (a) False (b) True
34. 34.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) True (b) False
35. 35.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
36. 36.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 70 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
37. 37.🛞 How far does a wheel roll in one full turn? (a) its radius (b) its weight (c) its circumference (d) its diameter
38. 38.🧭 A robot faces east. It does: turn right, turn left, turn around. Which way does it face now? (a) north (b) west (c) east (d) south
39. 39.Which of these suits wheels? (a) crossing stepping-stones (b) a long factory floor (c) soft snow (d) deep mud
40. 40.🔍 Which sensor helps a robot follow a black line? (a) a light sensor (b) a temperature sensor (c) a touch sensor (d) a distance sensor

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