Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 835 · 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.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
2. 2.Which job needs a distance sensor? (a) spot a red ball (b) feel a bump into a wall (c) stop before a wall (d) find the brightest spot
3. 3.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) not at all (c) slower but stronger (d) faster but weaker
4. 4.📡 An object is 340 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
5. 5.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
6. 6.📡 An object is 119 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
7. 7.True or false: “crossing stepping-stones” suits legs. (a) False (b) True
8. 8.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a touch sensor (b) a gyro sensor (c) a sound sensor (d) a camera
9. 9.🛞 Which way of moving suits this best: “a hospital corridor”? (a) propellers (b) wheels (c) tracks (d) legs
10. 10.📡 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?
11. 11.🧭 A robot should turn right 45°, but its gyro shows it turned 41°. How many degrees must it turn more to the right?
12. 12.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
13. 13.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its weight (c) its circumference (d) its radius
14. 14.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
15. 15.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
16. 16.⚙️ An 8-tooth gear drives a 16-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
17. 17.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
18. 18.🧭 A robot faces west. It does: turn around, turn left, turn right. Which way does it face now? (a) east (b) north (c) west (d) south
19. 19.🔍 Which sensor helps a robot feel a bump into a wall? (a) a temperature sensor (b) a sound sensor (c) a touch sensor (d) a distance sensor
20. 20.🛞 What is the main difficulty with legs for a robot? (a) harder to balance (b) they never tire (c) they are too cheap (d) too fast on floors
21. 21.📡 A distance sensor sends a sound pulse and hears the echo 14 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
22. 22.🧭 A robot spins 60° every second. How many seconds does it take to turn 300°?
23. 23.⚙️ A motor changes electrical energy into … (a) sound only (b) light (c) water (d) movement
24. 24.⚙️ A 16-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
25. 25.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 180°. Where does the arm point? (a) points straight up (b) points up and left (c) points left (d) points up and right
26. 26.🛞 How does a two-wheeled robot with no steering turn? (a) it stops for ever (b) one wheel runs faster (c) it uses a sail (d) it jumps
27. 27.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they are round (c) they spread the weight (d) they spin in the air
28. 28.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 180° (c) 18° (d) 1800°
29. 29.🛞 Which way of moving suits this best: “a muddy building site”? (a) wheels (b) legs (c) tracks (d) propellers
30. 30.🧭 How many degrees is a half turn (turn around)? (a) 360° (b) 45° (c) 90° (d) 180°
31. 31.📡 A distance sensor sends a sound pulse and hears the echo 3 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
32. 32.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) big (slow and strong) (b) zero (c) never important (d) small (fast, weak)
33. 33.🧭 What does a gyro help a robot do? (a) hear claps (b) see colours (c) turn by exact angles (d) smell smoke
34. 34.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 85 and the right sensor reads 30. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) neither sensor (d) the right sensor
35. 35.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 31. What is under the sensor? (a) the black line (b) the white floor
36. 36.🔍 Which sensor helps a robot find the brightest spot? (a) a light sensor (b) a touch sensor (c) a temperature sensor (d) a gyro sensor
37. 37.True or false: to measure a turn angle, use a touch sensor. (a) True (b) False
38. 38.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
39. 39.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
40. 40.🦾 A servo moves from 10° to 90°. How many degrees does it turn?

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