Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 102 · 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 20-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
2. 2.⚙️ A 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
3. 3.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
4. 4.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
5. 5.⚙️ How do you make a DC motor spin the other way? (a) add more wheels (b) paint it red (c) swap its two wires (d) shake it
6. 6.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
7. 7.True or false: to follow a black line, use a light sensor. (a) False (b) True
8. 8.⚙️ A 10-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
9. 9.Which of these suits wheels? (a) stepping over wide gaps (b) crossing stepping-stones (c) a field of tall boulders (d) a hospital corridor
10. 10.True or false: to stay balanced upright, use a temperature sensor. (a) True (b) False
11. 11.🧭 How many degrees is a right-angle turn? (a) 360° (b) 180° (c) 90° (d) 45°
12. 12.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 264 cm?
13. 13.📡 A robot is 220 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 27 seconds (in cm)?
14. 14.🦾 A servo moves from 90° to 50°. How many degrees does it turn?
15. 15.🧭 A robot should turn right 180°, but its gyro shows it turned 174°. How many degrees must it turn more to the right?
16. 16.Which job needs a touch sensor? (a) start on a hand clap (b) measure how far a box is (c) feel a bump into a wall (d) follow a black line
17. 17.True or false: “a long factory floor” suits wheels. (a) True (b) False
18. 18.Which of these suits tracks? (a) a field of tall boulders (b) a smooth classroom floor (c) moving under water (d) deep mud
19. 19.Which of these suits legs? (a) crossing stepping-stones (b) flying over a field (c) a flat road (d) a muddy building site
20. 20.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 70 and the right sensor reads 80. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor
21. 21.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
22. 22.🔍 Which sensor helps a robot measure a turn angle? (a) a sound sensor (b) a camera (c) a gyro sensor (d) a light sensor
23. 23.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
24. 24.True or false: to feel a bump into a wall, use a light sensor. (a) False (b) True
25. 25.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
26. 26.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) slower but stronger (c) at the same speed (d) faster but weaker
27. 27.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a DC motor (c) a buzzer (d) a light sensor
28. 28.⚙️ A 15-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
29. 29.🔦 A light sensor reads 30 over black and 70 over white. A good threshold is halfway between them. What is it?
30. 30.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 74. What is under the sensor? (a) the black line (b) the white floor
31. 31.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
32. 32.🦾 A servo moves from 20° to 60°. How many degrees does it turn?
33. 33.Which of these suits wheels? (a) soft snow (b) a smooth classroom floor (c) a muddy building site (d) flying over a field
34. 34.🛞 Which way of moving suits this best: “a flat road”? (a) legs (b) propellers (c) tracks (d) wheels
35. 35.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
36. 36.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) small (fast, weak) (c) zero (d) big (slow and strong)
37. 37.True or false: “a hospital corridor” suits tracks. (a) True (b) False
38. 38.True or false: “a hospital corridor” suits legs. (a) False (b) True
39. 39.🔍 Why do robots need sensors? (a) to be heavier (b) to use more power (c) to know their world (d) to look colourful
40. 40.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?

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