Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 594 · 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’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
2. 2.Which of these suits tracks? (a) soft snow (b) a flat road (c) a long factory floor (d) a hospital corridor
3. 3.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) spokes (d) teeth
4. 4.🧭 A robot spins 30° every second. How many seconds does it take to turn 210°?
5. 5.📡 A robot is 110 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 4 seconds (in cm)?
6. 6.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) at the same speed (c) faster but weaker (d) slower but stronger
7. 7.🧭 How many degrees is a full turn? (a) 360° (b) 90° (c) 180° (d) 100°
8. 8.🧭 How many degrees is a right-angle turn? (a) 180° (b) 45° (c) 90° (d) 360°
9. 9.📡 Which object is hardest for an echo sensor to notice? (a) a metal door (b) a wooden box (c) a soft foam cushion (d) a flat wall
10. 10.Which job needs a sound sensor? (a) follow a black line (b) measure how far a box is (c) stay balanced upright (d) hear a whistle
11. 11.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
12. 12.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 5 times (in cm)?
13. 13.⚙️ A motor makes 200 turns a minute with a 12-tooth gear on it. That gear drives a 24-tooth gear. How many turns a minute does the 24-tooth gear make?
14. 14.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 340 cm (b) 3 cm (c) 34 cm (d) 1 km
15. 15.True or false: “hovering over a roof” suits legs. (a) False (b) True
16. 16.🛞 Why do most indoor robots use wheels? (a) fast and easy on floors (b) they climb stairs (c) they float (d) they look funny
17. 17.Which of these suits tracks? (a) a field of tall boulders (b) moving under water (c) stepping over wide gaps (d) deep mud
18. 18.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how many full turns must they make to roll 44 cm?
19. 19.🛞 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 right (b) goes straight back (c) stays still (d) spins right on the spot
20. 20.🔍 Which sensor helps a robot warn if motors get hot? (a) a light sensor (b) a temperature sensor (c) a touch sensor (d) a sound sensor
21. 21.🧭 A robot should turn right 45°, but its gyro shows it turned 42°. How many degrees must it turn more to the right?
22. 22.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they spin in the air (c) they are round (d) they spread the weight
23. 23.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 18° (c) 180° (d) 1800°
24. 24.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 65. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the left sensor (d) the right sensor
25. 25.📡 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?
26. 26.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
27. 27.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
28. 28.🛞 How does a two-wheeled robot with no steering turn? (a) it jumps (b) it uses a sail (c) one wheel runs faster (d) it stops for ever
29. 29.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
30. 30.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) paint it red (c) shake it (d) add more wheels
31. 31.🔍 What does a gyro sensor measure? (a) sound (b) temperature (c) colour (d) turning (rotation)
32. 32.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 30 and the right sensor reads 85. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) neither sensor (d) the left sensor
33. 33.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 7 cm (use π = 22/7). The motor turns 4 times. How far does the robot roll (in cm)?
34. 34.⬛ 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 hot (d) black is loud
35. 35.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
36. 36.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
37. 37.⚙️ A 20-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
38. 38.🛞 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
39. 39.🔍 Why do robots need sensors? (a) to look colourful (b) to be heavier (c) to know their world (d) to use more power
40. 40.🦾 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 left (c) points up and left (d) points straight up

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