Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 590 · 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: “a hospital corridor” suits wheels. (a) True (b) False
2. 2.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
3. 3.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs forward. What does the robot do? (a) turns right (b) spins right on the spot (c) goes straight forward (d) spins left on the spot
4. 4.🦾 A servo program runs:
   angle = 90
   angle = angle − 60
   angle = angle + 60
   To what angle (in degrees) does the servo turn in the end?
5. 5.⚙️ A 12-tooth gear drives a 36-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
6. 6.🔍 Why do robots need sensors? (a) to look colourful (b) to be heavier (c) to know their world (d) to use more power
7. 7.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 220 cm?
8. 8.🧭 A robot keeps turning right by 60° at a time. How many turns make one full circle?
9. 9.🧭 A robot should turn right 45°, but its gyro shows it turned 50°. How many degrees must it turn back to the left?
10. 10.⚙️ A 12-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
11. 11.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
12. 12.🛞 Which way of moving suits this best: “soft snow”? (a) legs (b) wheels (c) tracks (d) propellers
13. 13.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
14. 14.🔍 A light sensor gets the most reflected light from … (a) a black line (b) a white surface (c) a black surface (d) a dark tunnel
15. 15.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driver turns 24 times. How many times does the driven gear turn?
16. 16.🔍 Which sensor helps a robot stay balanced upright? (a) a light sensor (b) a gyro sensor (c) a temperature sensor (d) a sound sensor
17. 17.True or false: to know a button is pressed, use a distance sensor. (a) True (b) False
18. 18.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) paint it red (c) add more wheels (d) shake it
19. 19.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 40. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) the right sensor (d) both sensors
20. 20.📡 A distance sensor sends a sound pulse and hears the echo 20 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
21. 21.🛞 Why do most indoor robots use wheels? (a) they float (b) they climb stairs (c) they look funny (d) fast and easy on floors
22. 22.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 15. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) the right sensor (d) neither sensor
23. 23.📡 Why do we halve the echo’s total path? (a) it goes there and back (b) sound is slow (c) to make it smaller (d) the sensor is half
24. 24.🔦 A light sensor reads 20 over black and 80 over white. A good threshold is halfway between them. What is it?
25. 25.📡 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)?
26. 26.🔦 A light sensor reads 40 over black and 80 over white. A good threshold is halfway between them. What is it?
27. 27.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
28. 28.⬛ The threshold of a light sensor is … (a) the battery size (b) the wheel size (c) the top speed (d) the black/white cut-off
29. 29.True or false: to know a button is pressed, use a sound sensor. (a) False (b) True
30. 30.⚙️ An 8-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
31. 31.⬛ 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
32. 32.🛞 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) goes straight back (b) spins right on the spot (c) goes straight forward (d) turns right
33. 33.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
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 is stopped. What does the robot do? (a) spins left on the spot (b) goes straight back (c) spins right on the spot (d) turns right
35. 35.⚙️ A 10-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
36. 36.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
37. 37.⚙️ A motor makes 40 turns a minute with an 8-tooth gear on it. That gear drives a 16-tooth gear. How many turns a minute does the 16-tooth gear make?
38. 38.True or false: “has just two wires” is true of a DC motor. (a) True (b) False
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 4 times (in cm)?
40. 40.True or false: “a flat road” suits wheels. (a) True (b) False

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