Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 525 · 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’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 60°, then right 60°. What does the gyro read now (0° to 359°)?
2. 2.⚙️ A 24-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
3. 3.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) at the same speed (c) slower but stronger (d) faster and weaker
4. 4.⚙️ A 60-tooth driver gear turns a 20-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
5. 5.🔍 For a robot’s controller, is a sensor an input or an output? (a) a gear (b) a wheel (c) an output (d) an input
6. 6.True or false: “moves an arm joint” is true of a DC motor. (a) False (b) True
7. 7.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
8. 8.Which of these suits propellers? (a) a flat road (b) hovering over a roof (c) stepping over wide gaps (d) a muddy building site
9. 9.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
10. 10.📡 Why do we halve the echo’s total path? (a) it goes there and back (b) to make it smaller (c) the sensor is half (d) sound is slow
11. 11.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 45. What is under the sensor? (a) the black line (b) the white floor
12. 12.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 19. What is under the sensor? (a) the white floor (b) the black line
13. 13.⚙️ A motor makes 500 turns a minute with a 12-tooth gear on it. That gear drives a 60-tooth gear. How many turns a minute does the 60-tooth gear make?
14. 14.🔢 Gear ratio = driven teeth ÷ … (a) number of gears (b) driver teeth (c) motor volts (d) wheel size
15. 15.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
16. 16.🔍 Which sensor helps a robot spot a red ball? (a) a touch sensor (b) a gyro sensor (c) a camera (d) a light sensor
17. 17.⚙️ An 8-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
18. 18.True or false: to measure a turn angle, use a gyro sensor. (a) True (b) False
19. 19.🔍 What does a gyro sensor measure? (a) colour (b) temperature (c) sound (d) turning (rotation)
20. 20.🔦 A light sensor reads 10 over black and 60 over white. A good threshold is halfway between them. What is it?
21. 21.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
22. 22.🔦 A light sensor reads 30 over black and 80 over white. A good threshold is halfway between them. What is it?
23. 23.📡 Which animal finds its way by echoes, like this sensor? (a) a cow (b) a goldfish (c) a snail (d) a bat
24. 24.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
25. 25.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
26. 26.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
27. 27.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
28. 28.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
29. 29.🔦 A light sensor reads 10 over black and 90 over white. A good threshold is halfway between them. What is it?
30. 30.🛞 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) goes straight back (b) goes straight forward (c) turns right (d) turns left
31. 31.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driver turns 18 times. How many times does the driven gear turn?
32. 32.🛞 Which way of moving suits this best: “deep mud”? (a) propellers (b) wheels (c) legs (d) tracks
33. 33.⚙️ A 12-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?
34. 34.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 48. What is under the sensor? (a) the white floor (b) the black line
35. 35.True or false: “loose sand dunes” suits legs. (a) True (b) False
36. 36.🧭 How many degrees is a half turn (turn around)? (a) 180° (b) 360° (c) 45° (d) 90°
37. 37.🧭 What does a gyro help a robot do? (a) see colours (b) smell smoke (c) turn by exact angles (d) hear claps
38. 38.🧭 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 right 120°, then right 135°. What does the gyro read now (0° to 359°)?
39. 39.🧭 A robot spins 15° every second. How many seconds does it take to turn 180°?
40. 40.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise

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