Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 963 · 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.📡 An object is 85 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
2. 2.True or false: “a smooth classroom floor” suits wheels. (a) True (b) False
3. 3.⚙️ A 12-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
4. 4.True or false: “good for a racing toy” happens when a small gear drives a big one. (a) True (b) False
5. 5.🔍 Which sensor helps a robot spot a red ball? (a) a temperature sensor (b) a camera (c) a distance sensor (d) a touch sensor
6. 6.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times bigger (b) 3 times slower (c) 3 times louder (d) 3 times faster
7. 7.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
8. 8.🛞 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)? =
9. 9.🧭 A robot should turn right 45°, but its gyro shows it turned 44°. How many degrees must it turn more to the right?
10. 10.🛞 Which way of moving suits this best: “a long factory floor”? (a) propellers (b) legs (c) wheels (d) tracks
11. 11.📡 An object is 272 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
12. 12.🛞 How does a two-wheeled robot with no steering turn? (a) it uses a sail (b) it stops for ever (c) one wheel runs faster (d) it jumps
13. 13.True or false: “a hospital corridor” suits wheels. (a) True (b) False
14. 14.True or false: “a hospital corridor” suits tracks. (a) False (b) True
15. 15.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) at the same speed (c) not at all (d) slower but stronger
16. 16.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 8 times (in cm)?
17. 17.📡 An object is 255 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
18. 18.🔍 Why do robots need sensors? (a) to know their world (b) to be heavier (c) to look colourful (d) to use more power
19. 19.🛞 How far does a wheel roll in one full turn? (a) its circumference (b) its weight (c) its radius (d) its diameter
20. 20.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 60. Which sensor is over the black line? (a) both sensors (b) the left sensor (c) the right sensor (d) neither sensor
21. 21.True or false: to know a button is pressed, use a camera. (a) True (b) False
22. 22.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
23. 23.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a goldfish (c) a snail (d) a cow
24. 24.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
25. 25.📡 An object is 51 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
26. 26.🧭 A robot faces south. It does: turn around, turn left. Which way does it face now? (a) west (b) north (c) south (d) east
27. 27.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
28. 28.📡 A robot is 270 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)?
29. 29.Which job needs a gyro sensor? (a) stop before a wall (b) measure a turn angle (c) feel a bump into a wall (d) measure how far a box is
30. 30.🧭 A robot should turn right 90°, but its gyro shows it turned 80°. How many degrees must it turn more to the right?
31. 31.🔍 For a robot’s controller, is a sensor an input or an output? (a) an output (b) a gear (c) an input (d) a wheel
32. 32.🔦 A light sensor reads 10 over black and 60 over white. A good threshold is halfway between them. What is it?
33. 33.🦾 A servo moves from 100° to 110°. How many degrees does it turn?
34. 34.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor runs backward. What does the robot do? (a) turns right (b) spins right on the spot (c) turns left (d) spins left on the spot
35. 35.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 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 right (c) curves to the left
36. 36.Which job needs a touch sensor? (a) measure a turn angle (b) hear a whistle (c) find the brightest spot (d) feel a bump into a wall
37. 37.📡 An object is 17 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
38. 38.🧭 How many degrees is a full turn? (a) 100° (b) 180° (c) 90° (d) 360°
39. 39.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
40. 40.⚙️ A motor makes 160 turns a minute with a 15-tooth gear on it. That gear drives a 30-tooth gear. How many turns a minute does the 30-tooth gear make?

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