Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 625 · 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 robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
2. 2.True or false: to hear a whistle, use a sound sensor. (a) False (b) True
3. 3.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 30. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
4. 4.🛞 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 backward. What does the robot do? (a) spins right on the spot (b) turns right (c) turns left (d) goes straight back
5. 5.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
6. 6.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
7. 7.🔍 For a robot’s controller, is a sensor an input or an output? (a) an input (b) a wheel (c) a gear (d) an output
8. 8.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) hear claps (c) smell smoke (d) see colours
9. 9.⚙️ A 24-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
10. 10.⚙️ An 8-tooth driver gear turns a 40-tooth driven gear. The driver turns 35 times. How many times does the driven gear turn?
11. 11.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) tracks (b) wheels (c) propellers (d) legs
12. 12.🛞 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) goes straight forward (b) stays still (c) turns left (d) spins left on the spot
13. 13.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 42 cm (use π = 22/7). The motor turns 6 times. How far does the robot roll (in cm)?
14. 14.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
15. 15.🛞 Which way of moving suits this best: “a flat road”? (a) legs (b) wheels (c) tracks (d) propellers
16. 16.True or false: to follow a black line, use a touch sensor. (a) False (b) True
17. 17.🔍 Which sensor helps a robot measure a turn angle? (a) a touch sensor (b) a camera (c) a gyro sensor (d) a light sensor
18. 18.Which of these suits tracks? (a) loose sand dunes (b) a field of tall boulders (c) a flat road (d) crossing stepping-stones
19. 19.🧭 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 60°, then left 30°. What does the gyro read now (0° to 359°)?
20. 20.⚙️ A 20-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
21. 21.Which job needs a light sensor? (a) hear a whistle (b) follow a black line (c) know a button is pressed (d) stay balanced upright
22. 22.🧭 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 right 30°, then left 90°. What does the gyro read now (0° to 359°)?
23. 23.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) big (slow and strong) (b) small (fast, weak) (c) zero (d) never important
24. 24.🛞 How far does a wheel roll in one full turn? (a) its weight (b) its diameter (c) its circumference (d) its radius
25. 25.⚙️ A 15-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
26. 26.Which of these suits wheels? (a) a long factory floor (b) a muddy building site (c) hovering over a roof (d) moving under water
27. 27.🧭 A robot faces south. It does: turn right, turn around. Which way does it face now? (a) east (b) west (c) south (d) north
28. 28.🔢 Gear ratio = driven teeth ÷ … (a) driver teeth (b) number of gears (c) wheel size (d) motor volts
29. 29.🧭 A robot keeps turning right by 90° at a time. How many turns make one full circle?
30. 30.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
31. 31.True or false: “soft snow” suits wheels. (a) False (b) True
32. 32.⚙️ A motor changes electrical energy into … (a) water (b) movement (c) sound only (d) light
33. 33.🧭 How many degrees is a right-angle turn? (a) 180° (b) 90° (c) 45° (d) 360°
34. 34.⚙️ An 8-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
35. 35.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 36. What is under the sensor? (a) the white floor (b) the black line
36. 36.🧭 How many degrees is a full turn? (a) 90° (b) 180° (c) 360° (d) 100°
37. 37.True or false: “the output turns faster” happens when a big gear drives a small one. (a) False (b) True
38. 38.🧭 A robot should turn right 90°, but its gyro shows it turned 89°. How many degrees must it turn more to the right?
39. 39.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
40. 40.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 440 cm?

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