Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 134 · 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 job needs a sound sensor? (a) follow a black line (b) start on a hand clap (c) know a button is pressed (d) stop before a wall
2. 2.🛞 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) goes straight back (b) spins left on the spot (c) turns right (d) spins right on the spot
3. 3.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
4. 4.Which job needs a distance sensor? (a) follow a black line (b) read a QR code (c) start on a hand clap (d) stop before a wall
5. 5.🛞 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) spins left on the spot (b) goes straight back (c) stays still (d) spins right on the spot
6. 6.⚙️ How do you make a DC motor spin the other way? (a) shake it (b) add more wheels (c) swap its two wires (d) paint it red
7. 7.🛞 Which way of moving suits this best: “deep mud”? (a) propellers (b) wheels (c) tracks (d) legs
8. 8.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 340 cm (c) 1 km (d) 34 cm
9. 9.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) True (b) False
10. 10.True or false: “deep mud” suits tracks. (a) True (b) False
11. 11.🧭 How many degrees is a right-angle turn? (a) 360° (b) 45° (c) 90° (d) 180°
12. 12.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
13. 13.Which of these suits legs? (a) stepping over wide gaps (b) a smooth classroom floor (c) hovering over a roof (d) loose sand dunes
14. 14.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 10° (d) 18°
15. 15.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times louder (b) 3 times faster (c) 3 times bigger (d) 3 times slower
16. 16.🛞 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) turns right (b) goes straight forward (c) spins right on the spot (d) turns left
17. 17.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a gyro sensor (b) a sound sensor (c) a touch sensor (d) a camera
18. 18.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points up and left (b) points straight up (c) points up and right (d) points right
19. 19.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
20. 20.📡 A robot is 210 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 5 seconds (in cm)?
21. 21.📡 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?
22. 22.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) never important (c) big (slow and strong) (d) zero
23. 23.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 60 and the right sensor reads 20. Which sensor is over the black line? (a) both sensors (b) the left sensor (c) neither sensor (d) the right sensor
24. 24.📡 An object is 17 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
25. 25.🦾 A servo moves from 80° to 180°. How many degrees does it turn?
26. 26.📡 A robot is 150 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 3 seconds (in cm)?
27. 27.🛞 How does a two-wheeled robot with no steering turn? (a) it uses a sail (b) it stops for ever (c) it jumps (d) one wheel runs faster
28. 28.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
29. 29.Which job needs a sound sensor? (a) hear a whistle (b) spot a red ball (c) know a button is pressed (d) measure how far a box is
30. 30.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) anticlockwise (b) clockwise
31. 31.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 31. What is under the sensor? (a) the black line (b) the white floor
32. 32.Which of these suits tracks? (a) deep mud (b) a flat road (c) moving under water (d) a hospital corridor
33. 33.⚙️ A 10-tooth driver gear turns a 30-tooth driven gear. The driven gear turns 1 time. How many times did the driver turn?
34. 34.🦾 A servo moves from 120° to 40°. How many degrees does it turn?
35. 35.🛞 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) turns left (b) stays still (c) goes straight forward (d) spins right on the spot
36. 36.Which of these suits propellers? (a) a hospital corridor (b) a muddy building site (c) deep mud (d) flying over a field
37. 37.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 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
38. 38.Which of these suits propellers? (a) soft snow (b) a long factory floor (c) hovering over a roof (d) crossing stepping-stones
39. 39.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 5 times (in cm)?
40. 40.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise

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