Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 737 · 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 is 250 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 13 seconds (in cm)?
2. 2.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a sound sensor (b) a gyro sensor (c) a touch sensor (d) a camera
3. 3.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
4. 4.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 70 turns a minute and the right wheel at 60 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
5. 5.Which of these suits propellers? (a) hovering over a roof (b) a muddy building site (c) crossing stepping-stones (d) a long factory floor
6. 6.Which job needs a temperature sensor? (a) spot a red ball (b) warn if motors get hot (c) find the brightest spot (d) hear a whistle
7. 7.🧭 A robot should turn right 45°, but its gyro shows it turned 42°. How many degrees must it turn more to the right?
8. 8.🛞 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) goes straight forward (c) spins left on the spot (d) turns right
9. 9.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 5 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
10. 10.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
11. 11.🛞 How far does a wheel roll in one full turn? (a) its circumference (b) its radius (c) its diameter (d) its weight
12. 12.🧭 A robot’s gyro reads 0° when it faces north and counts up to 359° as it turns right (east is 90°). It starts at 90°. It turns left 45°, then right 90°. What does the gyro read now (0° to 359°)?
13. 13.🛞 Circumference = π × … (a) speed (b) weight (c) radius only (d) diameter
14. 14.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 65. What is under the sensor? (a) the black line (b) the white floor
15. 15.⚙️ An 8-tooth driver gear turns a 16-tooth driven gear. The driven gear turns 4 times. How many times did the driver turn?
16. 16.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 132 cm?
17. 17.📡 Which animal finds its way by echoes, like this sensor? (a) a cow (b) a goldfish (c) a snail (d) a bat
18. 18.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) add more wheels (c) paint it red (d) shake it
19. 19.True or false: “spins faster with more V” is true of a servo motor. (a) True (b) False
20. 20.🔍 For a robot’s controller, is a sensor an input or an output? (a) a gear (b) an input (c) a wheel (d) an output
21. 21.🛞 Which way of moving suits this best: “moving under water”? (a) tracks (b) legs (c) wheels (d) propellers
22. 22.🔦 A light sensor reads 10 over black and 80 over white. A good threshold is halfway between them. What is it?
23. 23.📡 An object is 306 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
24. 24.🧭 What does a gyro help a robot do? (a) turn by exact angles (b) see colours (c) smell smoke (d) hear claps
25. 25.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
26. 26.🧭 A robot spins 60° every second. How many seconds does it take to turn 120°?
27. 27.🛞 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) goes straight back (b) turns right (c) spins left on the spot (d) goes straight forward
28. 28.Which job needs a camera? (a) read a QR code (b) measure a turn angle (c) feel a bump into a wall (d) follow a black line
29. 29.⬛ A reading below the threshold means the sensor is over … (a) water (b) black (c) the sky (d) white
30. 30.⚙️ A 20-tooth driver gear turns a 100-tooth driven gear. The driven gear turns 8 times. How many times did the driver turn?
31. 31.📡 An object is 119 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
32. 32.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
33. 33.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
34. 34.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
35. 35.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 4 times (in cm)?
36. 36.📡 A robot is 180 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 25 seconds (in cm)?
37. 37.🔦 A light sensor reads 10 over black and 90 over white. A good threshold is halfway between them. What is it?
38. 38.⚙️ A 15-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
39. 39.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) wheels (b) legs (c) tracks (d) propellers
40. 40.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left

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