Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 84 · 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 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 left sensor (c) neither sensor (d) the right sensor
2. 2.Which of these suits propellers? (a) a hospital corridor (b) loose sand dunes (c) flying over a field (d) a field of tall boulders
3. 3.⬛ Why does a light sensor read a LOW number over a black line? (a) black is hot (b) black soaks up light (c) black is wet (d) black is loud
4. 4.Which of these suits tracks? (a) stepping over wide gaps (b) a smooth classroom floor (c) soft snow (d) a flat road
5. 5.True or false: “good for a slow crane” happens when a big gear drives a small one. (a) False (b) True
6. 6.🧭 A robot spins 90° every second. How many seconds does it take to turn 180°?
7. 7.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how many full turns must they make to roll 1320 cm?
8. 8.📡 Why do we halve the echo’s total path? (a) to make it smaller (b) sound is slow (c) the sensor is half (d) it goes there and back
9. 9.🧭 A robot spins 90° every second. How many seconds does it take to turn 90°?
10. 10.🔍 Which sensor helps a robot feel a bump into a wall? (a) a gyro sensor (b) a touch sensor (c) a light sensor (d) a camera
11. 11.🧭 A robot faces west. It does: turn right, turn around. Which way does it face now? (a) south (b) north (c) west (d) east
12. 12.Which of these suits tracks? (a) crossing stepping-stones (b) a hospital corridor (c) deep mud (d) a smooth classroom floor
13. 13.🛞 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
14. 14.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
15. 15.True or false: to feel a bump into a wall, use a gyro sensor. (a) False (b) True
16. 16.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) slower but stronger (c) not at all (d) at the same speed
17. 17.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 8 times (in cm)?
18. 18.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 90°. Where does the arm point? (a) points right (b) points straight up (c) points left (d) points up and left
19. 19.📡 A robot is 120 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 4 seconds (in cm)?
20. 20.📡 A robot stops if an object is closer than 50 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
21. 21.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 95 and the right sensor reads 40. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
22. 22.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 616 cm?
23. 23.🧭 A robot should turn right 90°, but its gyro shows it turned 76°. How many degrees must it turn more to the right?
24. 24.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) propellers (b) tracks (c) wheels (d) legs
25. 25.Which job needs a gyro sensor? (a) know a button is pressed (b) measure how far a box is (c) find the brightest spot (d) stay balanced upright
26. 26.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
27. 27.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
28. 28.⚙️ An 8-tooth driver gear turns a 24-tooth driven gear. The driver turns 30 times. How many times does the driven gear turn?
29. 29.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 85 and the right sensor reads 85. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) the left sensor (d) both sensors
30. 30.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
31. 31.🛞 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) stays still (b) spins right on the spot (c) turns right (d) turns left
32. 32.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
33. 33.⚙️ 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
34. 34.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
35. 35.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 10° (c) 1800° (d) 180°
36. 36.⚙️ What are the bumps round the edge of a gear called? (a) spokes (b) pins (c) teeth (d) tyres
37. 37.⚙️ A 16-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) faster (c) at the same speed
38. 38.🛞 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 forward. What does the robot do? (a) goes straight forward (b) turns right (c) spins right on the spot (d) goes straight back
39. 39.⚙️ A 15-tooth driver gear turns a 40-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed
40. 40.📡 An object is 272 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?

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