Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 759 · 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 job needs a sound sensor? (a) hear a whistle (b) warn if motors get hot (c) stop before a wall (d) follow a black line
2. 2.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how far does the robot roll when the wheels turn 5 times (in cm)?
3. 3.True or false: to know a button is pressed, use a temperature sensor. (a) True (b) False
4. 4.🔦 A light sensor reads 30 over black and 60 over white. A good threshold is halfway between them. What is it?
5. 5.⚙️ A 20-tooth driver gear turns a 100-tooth driven gear. The driver turns 30 times. How many times does the driven gear turn?
6. 6.🧭 A robot spins 15° every second. How many seconds does it take to turn 165°?
7. 7.Which job needs a touch sensor? (a) feel a bump into a wall (b) hear a whistle (c) read a QR code (d) measure how far a box is
8. 8.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a servo motor (c) a buzzer (d) a DC motor
9. 9.⚙️ A motor changes electrical energy into … (a) movement (b) water (c) sound only (d) light
10. 10.⚙️ A motor makes 80 turns a minute with an 8-tooth gear on it. That gear drives a 32-tooth gear. How many turns a minute does the 32-tooth gear make?
11. 11.🧭 A robot should turn right 180°, but its gyro shows it turned 174°. How many degrees must it turn more to the right?
12. 12.🔍 What does a gyro sensor measure? (a) colour (b) temperature (c) sound (d) turning (rotation)
13. 13.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a buzzer (b) a servo motor (c) a fan (d) a DC motor
14. 14.⚙️ A motor makes 500 turns a minute with an 8-tooth gear on it. That gear drives a 40-tooth gear. How many turns a minute does the 40-tooth gear make?
15. 15.⚙️ A 15-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 1 time. How many times did the driver turn?
16. 16.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) hear claps (c) smell smoke (d) see colours
17. 17.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a gear (b) a track (c) a servo (d) a caster wheel
18. 18.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) wheels (b) propellers (c) tracks (d) legs
19. 19.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points straight up (b) points up and left (c) points up and right (d) points right
20. 20.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 1 km (b) 340 cm (c) 3 cm (d) 34 cm
21. 21.🔢 Gear ratio = driven teeth ÷ … (a) number of gears (b) motor volts (c) driver teeth (d) wheel size
22. 22.True or false: “loose sand dunes” suits propellers. (a) True (b) False
23. 23.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
24. 24.⚙️ A motor makes 300 turns a minute with a 10-tooth gear on it. That gear drives a 30-tooth gear. How many turns a minute does the 30-tooth gear make?
25. 25.True or false: to know a button is pressed, use a touch sensor. (a) False (b) True
26. 26.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 80 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
27. 27.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 660 cm?
28. 28.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a DC motor (b) a servo motor
29. 29.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
30. 30.Which of these suits wheels? (a) a flat road (b) stepping over wide gaps (c) deep mud (d) a muddy building site
31. 31.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
32. 32.📡 A robot is 180 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 8 seconds (in cm)?
33. 33.🔍 Which sensor helps a robot measure a turn angle? (a) a camera (b) a touch sensor (c) a light sensor (d) a gyro sensor
34. 34.🦾 A servo moves from 150° to 120°. How many degrees does it turn?
35. 35.⚙️ 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
36. 36.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how many full turns must they make to roll 396 cm?
37. 37.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
38. 38.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) tracks (b) legs (c) wheels (d) propellers
39. 39.🔍 Which sensor helps a robot stop before a wall? (a) a light sensor (b) a gyro sensor (c) a distance sensor (d) a camera
40. 40.📡 Why do we halve the echo’s total path? (a) the sensor is half (b) sound is slow (c) it goes there and back (d) to make it smaller

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