Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 936 · 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.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) True (b) False
2. 2.🦾 A servo program runs:
   angle = 40
   angle = angle + 30
   angle = angle − 60
   To what angle (in degrees) does the servo turn in the end?
3. 3.🛞 Which way of moving suits this best: “flying over a field”? (a) wheels (b) legs (c) propellers (d) tracks
4. 4.⚙️ A 20-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
5. 5.True or false: “drives the wheels” is true of a servo motor. (a) True (b) False
6. 6.🧭 What does a gyro help a robot do? (a) hear claps (b) turn by exact angles (c) see colours (d) smell smoke
7. 7.🧭 How many degrees is a half turn (turn around)? (a) 180° (b) 45° (c) 360° (d) 90°
8. 8.📡 A robot is 200 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 5 seconds (in cm)?
9. 9.🔍 Which sensor helps a robot stop before a wall? (a) a sound sensor (b) a distance sensor (c) a temperature sensor (d) a light sensor
10. 10.True or false: to feel a bump into a wall, use a sound sensor. (a) True (b) False
11. 11.⚙️ An 8-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
12. 12.🦾 A servo moves from 150° to 30°. How many degrees does it turn?
13. 13.🧭 A robot should turn right 45°, but its gyro shows it turned 43°. How many degrees must it turn more to the right?
14. 14.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) paint it red (c) add more wheels (d) shake it
15. 15.📡 A robot is 170 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 2 seconds (in cm)?
16. 16.🔍 A light sensor gets the most reflected light from … (a) a dark tunnel (b) a white surface (c) a black line (d) a black surface
17. 17.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
18. 18.True or false: to feel a bump into a wall, use a touch sensor. (a) False (b) True
19. 19.🧭 How many degrees is a full turn? (a) 100° (b) 90° (c) 180° (d) 360°
20. 20.⚙️ A 15-tooth driver gear turns a 75-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
21. 21.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 704 cm?
22. 22.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 41. What is under the sensor? (a) the black line (b) the white floor
23. 23.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 60. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the left sensor (d) the right sensor
24. 24.🛞 Circumference = π × … (a) radius only (b) diameter (c) weight (d) speed
25. 25.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
26. 26.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
27. 27.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
28. 28.True or false: “a muddy building site” suits tracks. (a) True (b) False
29. 29.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) stays still (b) turns left (c) goes straight forward (d) goes straight back
30. 30.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) not at all (c) faster and weaker (d) slower but stronger
31. 31.🧭 A robot should turn right 180°, but its gyro shows it turned 173°. How many degrees must it turn more to the right?
32. 32.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
33. 33.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
34. 34.⚙️ A motor changes electrical energy into … (a) sound only (b) movement (c) light (d) water
35. 35.🧭 A robot faces east. It does: turn left, turn around, turn right, turn around. Which way does it face now? (a) north (b) south (c) east (d) west
36. 36.⬛ A reading below the threshold means the sensor is over … (a) water (b) white (c) the sky (d) black
37. 37.🛞 Which way of moving suits this best: “a muddy building site”? (a) wheels (b) propellers (c) tracks (d) legs
38. 38.⚙️ 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
39. 39.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its circumference (c) its radius (d) its weight
40. 40.🧭 A robot spins 15° every second. How many seconds does it take to turn 150°?

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