Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 712 · 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 tracks? (a) crossing stepping-stones (b) a smooth classroom floor (c) a flat road (d) soft snow
2. 2.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 55. What is under the sensor? (a) the black line (b) the white floor
3. 3.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
4. 4.True or false: to stay balanced upright, use a gyro sensor. (a) False (b) True
5. 5.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 3 times. How far does the robot roll (in cm)?
6. 6.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
7. 7.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) an output (c) an input (d) a gear
8. 8.⚙️ A 15-tooth gear drives a 75-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
9. 9.True or false: to hear a whistle, use a camera. (a) False (b) True
10. 10.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
11. 11.🧭 A robot faces north. It does: turn right, turn around, turn right. Which way does it face now? (a) south (b) east (c) north (d) west
12. 12.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 340 cm (c) 1 km (d) 34 cm
13. 13.True or false: to warn if motors get hot, use a distance sensor. (a) True (b) False
14. 14.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 7 turn? (a) clockwise (b) anticlockwise
15. 15.Which job needs a distance sensor? (a) know a button is pressed (b) stop before a wall (c) feel a bump into a wall (d) find the brightest spot
16. 16.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
17. 17.True or false: “a flat road” suits tracks. (a) False (b) True
18. 18.🔢 Gear ratio = driven teeth ÷ … (a) wheel size (b) number of gears (c) driver teeth (d) motor volts
19. 19.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) slower but stronger (c) faster and weaker (d) at the same speed
20. 20.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
21. 21.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 22/7 (b) 22 (c) 7/22 (d) 2/7
22. 22.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
23. 23.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) under the left sensor (b) far behind it (c) between the two sensors (d) under the right 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 backward. What does the robot do? (a) stays still (b) turns right (c) goes straight back (d) goes straight forward
25. 25.True or false: to start on a hand clap, use a touch sensor. (a) False (b) True
26. 26.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
27. 27.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 88 cm?
28. 28.Which job needs a gyro sensor? (a) find the brightest spot (b) know a button is pressed (c) stay balanced upright (d) hear a whistle
29. 29.Which of these suits wheels? (a) hovering over a roof (b) flying over a field (c) moving under water (d) a flat road
30. 30.Which job needs a distance sensor? (a) hear a whistle (b) follow a black line (c) measure how far a box is (d) know a button is pressed
31. 31.🔍 Which sensor helps a robot hear a whistle? (a) a camera (b) a light sensor (c) a sound sensor (d) a distance sensor
32. 32.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a gyro sensor (b) a touch sensor (c) a camera (d) a sound sensor
33. 33.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
34. 34.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) tracks (b) legs (c) wheels (d) propellers
35. 35.Which job needs a temperature sensor? (a) stay balanced upright (b) warn if motors get hot (c) start on a hand clap (d) find the brightest spot
36. 36.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
37. 37.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
38. 38.🧭 A robot spins 45° every second. How many seconds does it take to turn 135°?
39. 39.📡 An object is 17 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
40. 40.🛞 Which way of moving suits this best: “a long factory floor”? (a) tracks (b) legs (c) propellers (d) wheels

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