Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 576 · 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 servo turns 60° every 100 ms. How many milliseconds does it take to turn 180°?
2. 2.Which job needs a distance sensor? (a) find the brightest spot (b) read a QR code (c) feel a bump into a wall (d) stop before a wall
3. 3.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) big (slow and strong) (c) zero (d) never important
4. 4.🔍 What does a gyro sensor measure? (a) temperature (b) sound (c) colour (d) turning (rotation)
5. 5.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a servo motor (c) a light sensor (d) a buzzer
6. 6.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
7. 7.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
8. 8.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 18° (d) 10°
9. 9.🦾 A servo moves from 180° to 50°. How many degrees does it turn?
10. 10.📡 A distance sensor sends a sound pulse and hears the echo 17 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
11. 11.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
12. 12.🔍 Which sensor helps a robot read a QR code? (a) a camera (b) a light sensor (c) a distance sensor (d) a touch sensor
13. 13.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
14. 14.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 30. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) the left sensor (d) neither sensor
15. 15.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
16. 16.📡 Which object is hardest for an echo sensor to notice? (a) a flat wall (b) a metal door (c) a wooden box (d) a soft foam cushion
17. 17.⚙️ A motor makes 100 turns a minute with a 20-tooth gear on it. That gear drives a 40-tooth gear. How many turns a minute does the 40-tooth gear make?
18. 18.🧭 A robot faces west. It does: turn right, turn left, turn left, turn right. Which way does it face now? (a) west (b) east (c) south (d) north
19. 19.🧭 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 270°. It turns left 45°, then left 60°. What does the gyro read now (0° to 359°)?
20. 20.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 4 times. How many times did the driver turn?
21. 21.🔦 A light sensor reads 20 over black and 80 over white. A good threshold is halfway between them. What is it?
22. 22.🔍 Which sensor helps a robot start on a hand clap? (a) a light sensor (b) a sound sensor (c) a distance sensor (d) a gyro sensor
23. 23.⬛ The threshold of a light sensor is … (a) the wheel size (b) the black/white cut-off (c) the top speed (d) the battery size
24. 24.🔍 Which sensor helps a robot follow a black line? (a) a temperature sensor (b) a sound sensor (c) a light sensor (d) a gyro sensor
25. 25.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) between the two sensors (b) under the right sensor (c) far behind it (d) under the left sensor
26. 26.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) the same direction (d) in opposite directions
27. 27.🧭 How many degrees is a right-angle turn? (a) 45° (b) 90° (c) 180° (d) 360°
28. 28.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
29. 29.🧭 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 180°. It turns left 45°, then right 30°, then left 60°. What does the gyro read now (0° to 359°)?
30. 30.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
31. 31.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
32. 32.🔦 A light sensor reads 40 over black and 90 over white. A good threshold is halfway between them. What is it?
33. 33.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
34. 34.🧭 A robot faces south. It does: turn right, turn around, turn right, turn left. Which way does it face now? (a) north (b) east (c) south (d) west
35. 35.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) turns left (b) goes straight forward (c) spins right on the spot (d) spins left on the spot
36. 36.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 11. What is under the sensor? (a) the white floor (b) the black line
37. 37.🔍 Why do robots need sensors? (a) to use more power (b) to know their world (c) to look colourful (d) to be heavier
38. 38.🔢 Gear ratio = driven teeth ÷ … (a) wheel size (b) driver teeth (c) number of gears (d) motor volts
39. 39.🦾 A servo program runs:
    angle = 70
    angle = angle + 10
    angle = angle − 10
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
40. 40.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =

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