Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 960 · 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.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 4 (c) 1 (d) 2
2. 2.Which of these suits tracks? (a) soft snow (b) a smooth classroom floor (c) a field of tall boulders (d) a long factory floor
3. 3.🧭 A robot spins 60° every second. How many seconds does it take to turn 120°?
4. 4.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) far behind it (b) under the right sensor (c) between the two sensors (d) under the left sensor
5. 5.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
6. 6.🧭 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 180°, then right 180°. What does the gyro read now (0° to 359°)?
7. 7.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 340 cm (b) 3 cm (c) 34 cm (d) 1 km
8. 8.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 120°?
9. 9.True or false: “spins round and round” is true of a servo motor. (a) True (b) False
10. 10.📡 Why do we halve the echo’s total path? (a) the sensor is half (b) sound is slow (c) to make it smaller (d) it goes there and back
11. 11.🔦 A light sensor reads 10 over black and 80 over white. A good threshold is halfway between them. What is it?
12. 12.🔍 Which sensor helps a robot measure how far a box is? (a) a light sensor (b) a distance sensor (c) a sound sensor (d) a temperature sensor
13. 13.📡 A distance sensor sends a sound pulse and hears the echo 15 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
14. 14.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
15. 15.📡 An object is 153 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
16. 16.🛞 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 forward. What does the robot do? (a) spins left on the spot (b) spins right on the spot (c) turns right (d) turns left
17. 17.🔍 Which sensor helps a robot find the brightest spot? (a) a touch sensor (b) a temperature sensor (c) a camera (d) a light sensor
18. 18.⬛ The threshold of a light sensor is … (a) the black/white cut-off (b) the battery size (c) the top speed (d) the wheel size
19. 19.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor is stopped. What does the robot do? (a) spins right on the spot (b) turns left (c) stays still (d) spins left on the spot
20. 20.🦾 A servo moves from 120° to 20°. How many degrees does it turn?
21. 21.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
22. 22.🧭 A robot faces north. It does: turn left, turn around, turn right, turn right. Which way does it face now? (a) south (b) east (c) west (d) north
23. 23.🧭 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 90°. It turns left 30°, then left 60°, then right 45°. What does the gyro read now (0° to 359°)?
24. 24.📡 A robot is 260 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 5 seconds (in cm)?
25. 25.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
26. 26.⚙️ A 30-tooth driver gear turns a 10-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
27. 27.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 7 times (in cm)?
28. 28.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 25 and the right sensor reads 65. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) both sensors (d) the left sensor
29. 29.🔍 What does a gyro sensor measure? (a) temperature (b) sound (c) colour (d) turning (rotation)
30. 30.📡 An object is 34 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
31. 31.📡 A robot is 100 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 2 seconds (in cm)?
32. 32.Which job needs a touch sensor? (a) warn if motors get hot (b) feel a bump into a wall (c) find the brightest spot (d) start on a hand clap
33. 33.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a sound sensor (b) a camera (c) a touch sensor (d) a gyro sensor
34. 34.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
35. 35.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
36. 36.⬛ A reading below the threshold means the sensor is over … (a) black (b) water (c) white (d) the sky
37. 37.🧭 A robot faces north. It does: turn around, turn left, turn left. Which way does it face now? (a) east (b) north (c) south (d) west
38. 38.True or false: “a smooth classroom floor” suits wheels. (a) False (b) True
39. 39.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
40. 40.🛞 Which way of moving suits this best: “a long factory floor”? (a) propellers (b) wheels (c) legs (d) tracks

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