Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 298 · 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 10-tooth driver gear turns a 20-tooth driven gear. The driver turns 14 times. How many times does the driven gear turn?
2. 2.🛞 Circumference = π × … (a) radius only (b) weight (c) diameter (d) speed
3. 3.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 70 and the right sensor reads 75. Which sensor is over the black line? (a) the left sensor (b) the right sensor (c) both sensors (d) neither sensor
4. 4.🛞 How far does a wheel roll in one full turn? (a) its circumference (b) its weight (c) its radius (d) its diameter
5. 5.⚙️ A 12-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
6. 6.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
7. 7.🧭 A robot should turn right 180°, but its gyro shows it turned 183°. How many degrees must it turn back to the left?
8. 8.⚙️ A 10-tooth driver gear turns a 20-tooth driven gear. The driver turns 10 times. How many times does the driven gear turn?
9. 9.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
10. 10.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 132 cm?
11. 11.🛞 Which way of moving suits this best: “stepping over wide gaps”? (a) tracks (b) wheels (c) legs (d) propellers
12. 12.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
13. 13.🔍 Which sensor helps a robot read a QR code? (a) a touch sensor (b) a distance sensor (c) a temperature sensor (d) a camera
14. 14.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
15. 15.Which of these suits wheels? (a) a muddy building site (b) a long factory floor (c) stepping over wide gaps (d) flying over a field
16. 16.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
17. 17.🧭 A robot faces north. It does: turn left, turn right. Which way does it face now? (a) north (b) east (c) south (d) west
18. 18.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 2 (c) 1 (d) 4
19. 19.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
20. 20.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 21. What is under the sensor? (a) the black line (b) the white floor
21. 21.Which job needs a touch sensor? (a) feel a bump into a wall (b) find the brightest spot (c) follow a black line (d) measure how far a box is
22. 22.True or false: “moving under water” suits legs. (a) False (b) True
23. 23.⚙️ A 48-tooth driver gear turns a 12-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
24. 24.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
25. 25.⚙️ 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
26. 26.🧭 A robot should turn right 90°, but its gyro shows it turned 89°. How many degrees must it turn more to the right?
27. 27.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 2 times. How far does the robot roll (in cm)?
28. 28.🧭 A robot should turn right 45°, but its gyro shows it turned 51°. How many degrees must it turn back to the left?
29. 29.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 6 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
30. 30.📡 Which object is hardest for an echo sensor to notice? (a) a wooden box (b) a flat wall (c) a metal door (d) a soft foam cushion
31. 31.🔍 Which sensor helps a robot start on a hand clap? (a) a sound sensor (b) a light sensor (c) a touch sensor (d) a camera
32. 32.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
33. 33.Which job needs a light sensor? (a) follow a black line (b) stop before a wall (c) hear a whistle (d) know a button is pressed
34. 34.⚙️ A motor makes 100 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?
35. 35.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 65. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the right sensor (d) the left sensor
36. 36.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how many full turns must they make to roll 330 cm?
37. 37.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 30 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
38. 38.🛞 What is the main difficulty with legs for a robot? (a) too fast on floors (b) they are too cheap (c) harder to balance (d) they never tire
39. 39.🧭 A robot faces south. It does: turn right, turn left, turn right, turn right. Which way does it face now? (a) east (b) west (c) south (d) north
40. 40.🛞 How does a two-wheeled robot with no steering turn? (a) one wheel runs faster (b) it uses a sail (c) it stops for ever (d) it jumps

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