Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 726 · 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.⚙️ Two gears are meshed together. How do they turn? (a) one up, one down (b) the same direction (c) they do not turn (d) in opposite directions
2. 2.Which of these suits propellers? (a) a muddy building site (b) a hospital corridor (c) hovering over a roof (d) stepping over wide gaps
3. 3.Which job needs a touch sensor? (a) follow a black line (b) stay balanced upright (c) stop before a wall (d) know a button is pressed
4. 4.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
5. 5.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 34. What is under the sensor? (a) the black line (b) the white floor
6. 6.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 10 times. How many times did the driver turn?
7. 7.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
8. 8.Which job needs a distance sensor? (a) stop before a wall (b) feel a bump into a wall (c) start on a hand clap (d) spot a red ball
9. 9.Which job needs a sound sensor? (a) know a button is pressed (b) spot a red ball (c) measure a turn angle (d) start on a hand clap
10. 10.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 23. What is under the sensor? (a) the black line (b) the white floor
11. 11.Which job needs a touch sensor? (a) feel a bump into a wall (b) measure how far a box is (c) follow a black line (d) hear a whistle
12. 12.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
13. 13.⚙️ An 8-tooth gear drives a 16-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
14. 14.🧭 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 60°, then left 30°, then left 90°. What does the gyro read now (0° to 359°)?
15. 15.Which of these suits legs? (a) flying over a field (b) crossing stepping-stones (c) a flat road (d) a smooth classroom floor
16. 16.📡 A distance sensor sends a sound pulse and hears the echo 9 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
17. 17.⚙️ A 10-tooth driver gear turns a 40-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
18. 18.🔍 Which sensor helps a robot know a button is pressed? (a) a temperature sensor (b) a touch sensor (c) a light sensor (d) a sound sensor
19. 19.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 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
20. 20.True or false: “reverses if wires swap” is true of a servo motor. (a) False (b) True
21. 21.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
22. 22.🧭 A robot should turn right 45°, but its gyro shows it turned 39°. How many degrees must it turn more to the right?
23. 23.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 528 cm?
24. 24.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
25. 25.⚙️ An 8-tooth driver gear turns a 32-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?
26. 26.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
27. 27.Which of these suits wheels? (a) deep mud (b) loose sand dunes (c) stepping over wide gaps (d) a hospital corridor
28. 28.🔍 Why do robots need sensors? (a) to use more power (b) to know their world (c) to look colourful (d) to be heavier
29. 29.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) a gear (c) an output (d) an input
30. 30.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 40. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
31. 31.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) tracks (b) legs (c) wheels (d) propellers
32. 32.🧭 How many degrees is a half turn (turn around)? (a) 360° (b) 90° (c) 45° (d) 180°
33. 33.🔍 A light sensor gets the most reflected light from … (a) a black surface (b) a black line (c) a dark tunnel (d) a white surface
34. 34.Which of these suits legs? (a) a flat road (b) flying over a field (c) a muddy building site (d) stepping over wide gaps
35. 35.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
36. 36.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. The driven gear turns 8 times. How many times did the driver turn?
37. 37.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) zero (c) big (slow and strong) (d) never important
38. 38.🦾 A servo program runs:
    angle = 80
    angle = angle − 50
    angle = angle − 20
    angle = angle + 40
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
39. 39.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
40. 40.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driven gear turns 9 times. How many times did the driver turn?

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