Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 57 · 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.🛞 Which way of moving suits this best: “moving under water”? (a) wheels (b) tracks (c) legs (d) propellers
2. 2.🛞 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 left on the spot (b) turns right (c) goes straight back (d) goes straight forward
3. 3.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
4. 4.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
5. 5.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
6. 6.🧭 A robot faces south. It does: turn left, turn left. Which way does it face now? (a) west (b) east (c) south (d) north
7. 7.🔦 A light sensor reads 30 over black and 80 over white. A good threshold is halfway between them. What is it?
8. 8.📡 A distance sensor sends a sound pulse and hears the echo 4 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
9. 9.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
10. 10.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 31. What is under the sensor? (a) the black line (b) the white floor
11. 11.⚙️ A 48-tooth driver gear turns a 12-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
12. 12.True or false: “a flat road” suits wheels. (a) True (b) False
13. 13.🔍 What does a gyro sensor measure? (a) temperature (b) colour (c) turning (rotation) (d) sound
14. 14.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
15. 15.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
16. 16.True or false: “moves an arm joint” is true of a DC motor. (a) False (b) True
17. 17.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
18. 18.📡 Which animal finds its way by echoes, like this sensor? (a) a goldfish (b) a bat (c) a snail (d) a cow
19. 19.⚙️ A 16-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
20. 20.🛞 Circumference = π × … (a) radius only (b) weight (c) speed (d) diameter
21. 21.Which job needs a temperature sensor? (a) warn if motors get hot (b) hear a whistle (c) follow a black line (d) feel a bump into a wall
22. 22.🧭 A robot spins 15° every second. How many seconds does it take to turn 165°?
23. 23.Which job needs a gyro sensor? (a) warn if motors get hot (b) hear a whistle (c) start on a hand clap (d) stay balanced upright
24. 24.🔍 Which sensor helps a robot stay balanced upright? (a) a gyro sensor (b) a light sensor (c) a sound sensor (d) a temperature sensor
25. 25.True or false: “has just two wires” is true of a DC motor. (a) True (b) False
26. 26.🛞 Which way of moving suits this best: “hovering over a roof”? (a) legs (b) tracks (c) wheels (d) propellers
27. 27.⚙️ An 8-tooth driver gear must make the driven gear turn 3 times slower. How many teeth must the driven gear have?
28. 28.True or false: “moving under water” suits tracks. (a) True (b) False
29. 29.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
30. 30.📡 An object is 340 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
31. 31.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
32. 32.⚙️ A 40-tooth driver gear turns a 10-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
33. 33.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
34. 34.⚙️ A 10-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
35. 35.⚙️ A motor makes 210 turns a minute with a 20-tooth gear on it. That gear drives a 60-tooth gear. How many turns a minute does the 60-tooth gear make?
36. 36.True or false: “has just two wires” is true of a servo motor. (a) False (b) True
37. 37.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
38. 38.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) hear claps (c) smell smoke (d) see colours
39. 39.🔢 Gear ratio = driven teeth ÷ … (a) wheel size (b) driver teeth (c) number of gears (d) motor volts
40. 40.⬛ Why does a light sensor read a LOW number over a black line? (a) black soaks up light (b) black is wet (c) black is loud (d) black is hot

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