Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 787 · 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 20-tooth driver gear turns an 80-tooth driven gear. The driven gear turns 9 times. How many times did the driver turn?
2. 2.⚙️ A 40-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
3. 3.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
4. 4.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
5. 5.🔍 What does a gyro sensor measure? (a) turning (rotation) (b) sound (c) temperature (d) colour
6. 6.Which of these suits propellers? (a) a hospital corridor (b) a flat road (c) a muddy building site (d) hovering over a roof
7. 7.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 64. What is under the sensor? (a) the black line (b) the white floor
8. 8.🧭 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 right 30°, then left 30°, then right 60°. What does the gyro read now (0° to 359°)?
9. 9.🧭 A robot faces west. It does: turn right, turn left, turn left, turn right. Which way does it face now? (a) north (b) east (c) west (d) south
10. 10.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
11. 11.🧭 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 right 60°. What does the gyro read now (0° to 359°)?
12. 12.True or false: “deep mud” suits tracks. (a) True (b) False
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 and the right sensor reads 10. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) both sensors (d) the left sensor
14. 14.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 21. What is under the sensor? (a) the black line (b) the white floor
15. 15.Which job needs a temperature sensor? (a) feel a bump into a wall (b) warn if motors get hot (c) hear a whistle (d) measure how far a box is
16. 16.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a gear (b) a track (c) a servo (d) a caster wheel
17. 17.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 50. What is under the sensor? (a) the white floor (b) the black line
18. 18.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
19. 19.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 73. What is under the sensor? (a) the white floor (b) the black line
20. 20.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a buzzer (b) a DC motor (c) a light sensor (d) a servo motor
21. 21.⚙️ An 80-tooth driver gear turns a 20-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
22. 22.⚙️ A 10-tooth driver gear turns a 30-tooth driven gear. The driven gear turns 10 times. How many times did the driver turn?
23. 23.⚙️ A 12-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
24. 24.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 80. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the left sensor (d) the right sensor
25. 25.🛞 Circumference = π × … (a) weight (b) speed (c) diameter (d) radius only
26. 26.⚙️ An 8-tooth driver gear turns a 24-tooth driven gear. The driver turns 18 times. How many times does the driven gear turn?
27. 27.🛞 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) spins left on the spot (b) spins right on the spot (c) turns left (d) goes straight back
28. 28.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
29. 29.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
30. 30.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
31. 31.⚙️ 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
32. 32.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 90 and the right sensor reads 20. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) the right sensor (d) neither sensor
33. 33.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spread the weight (b) they spin in the air (c) they are shiny (d) they are round
34. 34.True or false: “holds a set angle” is true of a servo motor. (a) True (b) False
35. 35.🦾 A servo program runs:
    angle = 60
    angle = angle − 40
    angle = angle + 60
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
36. 36.🧭 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 right 30°, then left 120°, then left 120°. What does the gyro read now (0° to 359°)?
37. 37.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
38. 38.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
39. 39.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
40. 40.🧭 How many degrees is a right-angle turn? (a) 180° (b) 360° (c) 90° (d) 45°

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