Robotics Worksheet: Final Test

Robotics lesson 30: Final robotics test · Set 42 · 40 questions

Robot tip (Find the topic, use the idea): Find the topic: robot basics, moving, gears, sensors or programs. Use that lesson’s rule — sense/think/act, teeth × turns, circumference × turns, 17 cm per ms, follow every line. Safety answers are always: switch off, stay out of reach, an adult nearby, the emergency stop.

1. 1.🛑 Why can a moving robot not stop instantly? (a) it is too light (b) brakes are magic (c) it likes to slide (d) it keeps moving a bit
2. 2.📋 A robot program runs:
   speed = 30
   speed = speed − 20
   speed = speed + 15
   What is the speed at the end?
3. 3.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 38. What is under the sensor? (a) the white floor (b) the black line
4. 4.True or false: to keep fingers off gears is safe. (a) True (b) False
5. 5.📋 A robot’s battery is at 100%. Each “forward 10 cm” uses 4% and each turn uses 2%. It runs:
   repeat 5 { forward 10 cm; turn right 90° }
   What is the battery level at the end (in %)?
6. 6.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
7. 7.🧩 Which part of a robot holds all parts together? (a) the battery (b) the frame (c) the wheels (d) the gripper
8. 8.🧩 Which part of a robot tell it what is around? (a) the controller (b) the sensors (c) the battery (d) the wheels
9. 9.🏆 Your robot fails in a round. What is the best thing to do? (a) give up at once (b) break the robot (c) blame a teammate (d) find the cause, retry
10. 10.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
11. 11.Which of these robots works in a warehouse? (a) a car-painting robot (b) a planet rover (c) a box-stacking robot (d) a window-cleaning robot
12. 12.🔋 A robot’s battery is at 20% and charging adds 20% every 10 minutes. How many minutes until it is full (100%)?
13. 13.True or false: a lab sample robot works in a hospital. (a) False (b) True
14. 14.🔍 Which sensor helps a robot find the brightest spot? (a) a temperature sensor (b) a distance sensor (c) a camera (d) a light sensor
15. 15.🔍 Which is the odd one out? (a) let people say no to it (b) ask before taking photos (c) check AI answers (d) take off a safety guard
16. 16.🗺️ A robot is on a grid at (1, 6), facing north. (The first number counts squares across to the east, the second counts squares up to the north.) It runs:
    forward 1
    turn right
    forward 3
    turn left
    forward 1
    On which square does it stop? (a) (5, 8) (b) (4, 8) (c) (4, 7) (d) (8, 4)
17. 17.🤝 Robots are most useful for jobs that are … (a) fun and creative (b) kind and caring (c) dull, dirty or dangerous (d) about feelings
18. 18.Which of these is not safe? (a) check wires before use (b) charge on a hard surface (c) keep hair tied back (d) stand in a robot’s path
19. 19.📡 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?
20. 20.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) zero (c) big (slow and strong) (d) small (fast, weak)
21. 21.True or false: “spray crops evenly” is a job robots do well. (a) False (b) True
22. 22.True or false: to fix bugs quickly is a responsible way to use robots and AI. (a) True (b) False
23. 23.⚙️ A 10-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
24. 24.Which job is done by the sensors? (a) holds all parts together (b) make the wheels turn (c) move the arms and legs (d) measure light and sound
25. 25.True or false: a skateboard is a robot. (a) False (b) True
26. 26.🔢 To make a robot vacuum avoid a chair, what comes right after “the bumper is pressed”? (a) the motors turn it (b) it decides to turn (c) the controller reads it (d) it drives on
27. 27.📡 A robot is 210 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 7 seconds (in cm)?
28. 28.🧩 Which part is often called the robot’s brain? (a) the battery (b) the wheels (c) the frame (d) the controller
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) turns right (b) spins right on the spot (c) goes straight back (d) turns left
30. 30.📋 A warehouse robot starts with an empty tray and runs:
    pick up 1 box
    pick up 4 boxes
    pick up 4 boxes
    How many boxes are on its tray at the end?
31. 31.🗺️ A robot is on a grid at (4, 5), facing east. (The first number counts squares across to the east, the second counts squares up to the north.) It runs:
    forward 3
    turn left
    forward 1
    turn left
    forward 2
    turn left
    forward 3
    On which square does it stop? (a) (5, 3) (b) (5, 6) (c) (6, 3) (d) (3, 5)
32. 32.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
    repeat 6 { forward 10 cm; turn right 120° }
    What should 120 be changed to?
33. 33.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 5 times (left–right): black–white, white–black, white–black, black–white, black–black. How many times does it turn left?
34. 34.True or false: to stop before a wall, use a distance sensor. (a) False (b) True
35. 35.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is not pressed. What does the robot do? (a) back up and turn right (b) go forward
36. 36.🧭 A robot should turn right 45°, but its gyro shows it turned 43°. How many degrees must it turn more to the right?
37. 37.Which of these is a robot? (a) a wheelbarrow (b) a pulley (c) a line-follower robot (d) a pair of scissors
38. 38.🔍 Which is the odd one out? (a) a robot lawn mower (b) a parcel-sorting robot (c) a planet rover (d) a hammer
39. 39.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
40. 40.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big

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