Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 442 · 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 150°?
2. 2.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 35 and the right sensor reads 70. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) the left sensor (d) neither sensor
3. 3.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 14 cm (use π = 22/7). The motor turns 3 times. How far does the robot roll (in cm)?
4. 4.🔍 Which sensor helps a robot know a button is pressed? (a) a gyro sensor (b) a temperature sensor (c) a sound sensor (d) a touch sensor
5. 5.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a DC motor (d) a light sensor
6. 6.True or false: to feel a bump into a wall, use a touch sensor. (a) False (b) True
7. 7.🧭 What does a gyro help a robot do? (a) hear claps (b) see colours (c) smell smoke (d) turn by exact angles
8. 8.True or false: “a field of tall boulders” suits tracks. (a) True (b) False
9. 9.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
10. 10.🔍 Which sensor helps a robot find the brightest spot? (a) a light sensor (b) a gyro sensor (c) a sound sensor (d) a distance sensor
11. 11.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 85 and the right sensor reads 60. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) both sensors (d) the right sensor
12. 12.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
13. 13.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
14. 14.Which of these suits tracks? (a) a flat road (b) loose sand dunes (c) a long factory floor (d) flying over a field
15. 15.True or false: “has just two wires” is true of a DC motor. (a) False (b) True
16. 16.True or false: “stepping over wide gaps” suits legs. (a) True (b) False
17. 17.📡 A robot is 300 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 6 seconds (in cm)?
18. 18.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 396 cm?
19. 19.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points right (b) points left (c) points up and left (d) points up and right
20. 20.🛞 Circumference = π × … (a) radius only (b) weight (c) diameter (d) speed
21. 21.⚙️ A 16-tooth driver gear turns a 24-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
22. 22.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
23. 23.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) big (slow and strong) (c) zero (d) small (fast, weak)
24. 24.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
25. 25.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
26. 26.🔦 A light sensor reads 40 over black and 60 over white. A good threshold is halfway between them. What is it?
27. 27.🧭 A robot spins 45° every second. How many seconds does it take to turn 180°?
28. 28.📡 A robot is 240 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 10 seconds (in cm)?
29. 29.🧭 A robot spins 45° every second. How many seconds does it take to turn 315°?
30. 30.True or false: “spins faster with more V” is true of a DC motor. (a) True (b) False
31. 31.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) at the same speed (c) faster but weaker (d) not at all
32. 32.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) anticlockwise (b) clockwise
33. 33.🛞 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 backward. What does the robot do? (a) spins right on the spot (b) turns right (c) goes straight back (d) stays still
34. 34.🧭 A robot should turn right 180°, but its gyro shows it turned 179°. How many degrees must it turn more to the right?
35. 35.True or false: to stay balanced upright, use a gyro sensor. (a) False (b) True
36. 36.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 30 and the right sensor reads 70. Which sensor is over the black line? (a) both sensors (b) the left sensor (c) neither sensor (d) the right sensor
37. 37.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 75. What is under the sensor? (a) the white floor (b) the black line
38. 38.📡 An object is 136 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
39. 39.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 42 cm (use π = 22/7). The motor turns 3 times. How far does the robot roll (in cm)?
40. 40.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True

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