Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 997 · 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 should turn right 90°, but its gyro shows it turned 80°. How many degrees must it turn more to the right?
2. 2.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
3. 3.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they spin in the air (c) they are round (d) they spread the weight
4. 4.True or false: “a long factory floor” suits wheels. (a) True (b) False
5. 5.📡 A distance sensor sends a sound pulse and hears the echo 17 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
6. 6.🧭 How many degrees is a half turn (turn around)? (a) 360° (b) 180° (c) 90° (d) 45°
7. 7.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 70. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) the right sensor (d) both sensors
8. 8.🛞 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) spins left on the spot (b) turns left (c) goes straight back (d) spins right on the spot
9. 9.📡 A robot is 230 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 6 seconds (in cm)?
10. 10.🧭 A robot faces east. It does: turn right, turn right, turn around, turn around. Which way does it face now? (a) east (b) west (c) north (d) south
11. 11.Which of these suits wheels? (a) hovering over a roof (b) deep mud (c) a flat road (d) crossing stepping-stones
12. 12.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
13. 13.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 1 km (b) 34 cm (c) 3 cm (d) 340 cm
14. 14.🔢 Gear ratio = driven teeth ÷ … (a) driver teeth (b) motor volts (c) number of gears (d) wheel size
15. 15.⚙️ A 10-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
16. 16.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
17. 17.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) zero (c) never important (d) big (slow and strong)
18. 18.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points right (b) points straight up (c) points up and right (d) points up and left
19. 19.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a gyro sensor (b) a sound sensor (c) a camera (d) a touch sensor
20. 20.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
21. 21.🔦 A light sensor reads 40 over black and 70 over white. A good threshold is halfway between them. What is it?
22. 22.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
23. 23.⚙️ A 10-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
24. 24.True or false: to feel a bump into a wall, use a touch sensor. (a) True (b) False
25. 25.🔦 A light sensor reads 40 over black and 80 over white. A good threshold is halfway between them. What is it?
26. 26.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) teeth (c) tyres (d) spokes
27. 27.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
28. 28.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 15. What is under the sensor? (a) the black line (b) the white floor
29. 29.🛞 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 left on the spot (b) spins right on the spot (c) goes straight back (d) goes straight forward
30. 30.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 198 cm?
31. 31.🔍 Which sensor helps a robot hear a whistle? (a) a sound sensor (b) a touch sensor (c) a camera (d) a gyro sensor
32. 32.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
33. 33.🦾 A servo moves from 110° to 20°. How many degrees does it turn?
34. 34.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
35. 35.📡 A robot is 220 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 21 seconds (in cm)?
36. 36.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 18° (c) 1800° (d) 180°
37. 37.🔍 Which sensor helps a robot find the brightest spot? (a) a camera (b) a light sensor (c) a distance sensor (d) a touch sensor
38. 38.🔍 For a robot’s controller, is a sensor an input or an output? (a) an output (b) a gear (c) a wheel (d) an input
39. 39.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a caster wheel (b) a track (c) a servo (d) a gear
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 and the right sensor reads 60. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the left sensor (d) the right sensor

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