Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 992 · 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 gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
2. 2.🛞 How far does a wheel roll in one full turn? (a) its radius (b) its weight (c) its diameter (d) its circumference
3. 3.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 95 and the right sensor reads 95. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor
4. 4.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 29. What is under the sensor? (a) the white floor (b) the black line
5. 5.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
6. 6.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 30 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
7. 7.⚙️ A motor makes 440 turns a minute with a 15-tooth gear on it. That gear drives a 60-tooth gear. How many turns a minute does the 60-tooth gear make?
8. 8.🛞 Which way of moving suits this best: “moving under water”? (a) tracks (b) propellers (c) wheels (d) legs
9. 9.🧭 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 135°, then left 30°. What does the gyro read now (0° to 359°)?
10. 10.🦾 A servo moves from 170° to 70°. How many degrees does it turn?
11. 11.Which of these suits tracks? (a) deep mud (b) crossing stepping-stones (c) a smooth classroom floor (d) a field of tall boulders
12. 12.🔍 Which sensor helps a robot know a button is pressed? (a) a gyro sensor (b) a distance sensor (c) a touch sensor (d) a light sensor
13. 13.⚙️ How do you make a DC motor spin the other way? (a) add more wheels (b) shake it (c) paint it red (d) swap its two wires
14. 14.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) teeth (c) tyres (d) pins
15. 15.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 50. What is under the sensor? (a) the white floor (b) the black line
16. 16.True or false: to measure how far a box is, use a distance sensor. (a) False (b) True
17. 17.🛞 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) goes straight forward (b) spins right on the spot (c) goes straight back (d) turns right
18. 18.True or false: “flying over a field” suits propellers. (a) False (b) True
19. 19.🦾 A servo program runs:
    angle = 110
    angle = angle − 10
    angle = angle + 40
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
20. 20.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
21. 21.🛞 Which way of moving suits this best: “a hospital corridor”? (a) tracks (b) propellers (c) legs (d) wheels
22. 22.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 12 times. How far does the robot roll (in cm)?
23. 23.True or false: “moves an arm joint” is true of a DC motor. (a) True (b) False
24. 24.True or false: “has a signal wire” is true of a DC motor. (a) False (b) True
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 0°. It turns left 30°, then left 90°. What does the gyro read now (0° to 359°)?
26. 26.📡 An object is 272 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
27. 27.Which of these suits legs? (a) a long factory floor (b) a field of tall boulders (c) loose sand dunes (d) deep mud
28. 28.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
29. 29.⚙️ A motor changes electrical energy into … (a) sound only (b) water (c) light (d) movement
30. 30.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how far does the robot roll when the wheels turn 3 times (in cm)?
31. 31.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
32. 32.📡 A robot is 270 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 22 seconds (in cm)?
33. 33.📡 An object is 85 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
34. 34.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
35. 35.True or false: “a hospital corridor” suits wheels. (a) True (b) False
36. 36.🧭 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 180°, then left 60°, then right 60°. What does the gyro read now (0° to 359°)?
37. 37.🛞 Which way of moving suits this best: “hovering over a roof”? (a) wheels (b) propellers (c) tracks (d) legs
38. 38.Which of these suits propellers? (a) flying over a field (b) stepping over wide gaps (c) a flat road (d) a muddy building site
39. 39.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 30 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
40. 40.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 3 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No

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