Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 150 · 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.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
2. 2.🧭 How many degrees is a half turn (turn around)? (a) 360° (b) 45° (c) 90° (d) 180°
3. 3.🔍 What does a gyro sensor measure? (a) temperature (b) sound (c) turning (rotation) (d) colour
4. 4.🛞 Which way of moving suits this best: “a hospital corridor”? (a) wheels (b) legs (c) propellers (d) tracks
5. 5.Which of these suits propellers? (a) flying over a field (b) a muddy building site (c) soft snow (d) deep mud
6. 6.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
7. 7.🛞 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)?
8. 8.⚙️ A 10-tooth driver gear turns a 16-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
9. 9.🔢 Gear ratio = driven teeth ÷ … (a) number of gears (b) motor volts (c) wheel size (d) driver teeth
10. 10.🔦 A light sensor reads 10 over black and 90 over white. A good threshold is halfway between them. What is it?
11. 11.🔍 Which sensor helps a robot follow a black line? (a) a light sensor (b) a gyro sensor (c) a distance sensor (d) a sound sensor
12. 12.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a DC motor (b) a fan (c) a buzzer (d) a servo motor
13. 13.Which of these suits tracks? (a) moving under water (b) loose sand dunes (c) a field of tall boulders (d) a smooth classroom floor
14. 14.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
15. 15.📡 An object is 221 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
16. 16.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 18° (c) 180° (d) 1800°
17. 17.🛞 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?
18. 18.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
19. 19.⚙️ A motor changes electrical energy into … (a) movement (b) light (c) sound only (d) water
20. 20.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
21. 21.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
22. 22.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
23. 23.🧭 How many degrees is a right-angle turn? (a) 180° (b) 45° (c) 360° (d) 90°
24. 24.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 9 times. How far does the robot roll (in cm)?
25. 25.🧭 How many degrees is a full turn? (a) 100° (b) 360° (c) 180° (d) 90°
26. 26.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 3 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
27. 27.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
28. 28.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) faster (b) nowhere (c) backwards (d) slower
29. 29.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
30. 30.🔍 Which sensor helps a robot warn if motors get hot? (a) a touch sensor (b) a light sensor (c) a sound sensor (d) a temperature sensor
31. 31.🔍 Which sensor helps a robot stay balanced upright? (a) a touch sensor (b) a temperature sensor (c) a gyro sensor (d) a light sensor
32. 32.⚙️ A 45-tooth driver gear turns a 15-tooth driven gear. The driver turns 1 time. How many times does the driven gear turn?
33. 33.Which of these suits propellers? (a) a muddy building site (b) a field of tall boulders (c) loose sand dunes (d) moving under water
34. 34.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
35. 35.⬛ The threshold of a light sensor is … (a) the battery size (b) the wheel size (c) the black/white cut-off (d) the top speed
36. 36.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
37. 37.True or false: “deep mud” suits legs. (a) True (b) False
38. 38.True or false: to follow a black line, use a light sensor. (a) False (b) True
39. 39.📡 A distance sensor sends a sound pulse and hears the echo 6 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
40. 40.🔍 Which sensor helps a robot measure a turn angle? (a) a touch sensor (b) a gyro sensor (c) a light sensor (d) a camera

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids