Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 579 · 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 distance sensor? (a) find the brightest spot (b) spot a red ball (c) stop before a wall (d) follow a black line
2. 2.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
3. 3.🔢 Gear ratio = driven teeth ÷ … (a) driver teeth (b) motor volts (c) number of gears (d) wheel size
4. 4.⚙️ A 12-tooth driver gear turns a 36-tooth driven gear. The driver turns 24 times. How many times does the driven gear turn?
5. 5.🧭 How many degrees is a full turn? (a) 90° (b) 360° (c) 100° (d) 180°
6. 6.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
7. 7.🧭 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 270°. It turns left 135°, then right 60°, then left 120°. What does the gyro read now (0° to 359°)?
8. 8.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
9. 9.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
10. 10.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
11. 11.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
12. 12.📡 Which object is hardest for an echo sensor to notice? (a) a wooden box (b) a flat wall (c) a soft foam cushion (d) a metal door
13. 13.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
14. 14.🧭 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 180°. It turns left 180°, then right 30°. What does the gyro read now (0° to 359°)?
15. 15.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
16. 16.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 60. Which sensor is over the black line? (a) the left sensor (b) the right sensor (c) neither sensor (d) both sensors
17. 17.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
18. 18.🧭 A robot keeps turning right by 72° at a time. How many turns make one full circle?
19. 19.⚙️ An 8-tooth driver gear turns a 32-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
20. 20.🦾 A servo program runs:
    angle = 180
    angle = angle − 10
    angle = angle − 20
    angle = angle + 20
    To what angle (in degrees) does the servo turn in the end?
21. 21.🔍 For a robot’s controller, is a sensor an input or an output? (a) an input (b) an output (c) a gear (d) a wheel
22. 22.🔍 Which sensor helps a robot find the brightest spot? (a) a camera (b) a gyro sensor (c) a light sensor (d) a sound sensor
23. 23.🔍 Which sensor helps a robot measure how far a box is? (a) a temperature sensor (b) a distance sensor (c) a gyro sensor (d) a sound sensor
24. 24.⚙️ A 10-tooth gear drives a 30-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
25. 25.True or false: “spins round and round” is true of a DC motor. (a) False (b) True
26. 26.⬛ A reading below the threshold means the sensor is over … (a) white (b) the sky (c) black (d) water
27. 27.🛞 Which way of moving suits this best: “loose sand dunes”? (a) tracks (b) propellers (c) wheels (d) legs
28. 28.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 37. What is under the sensor? (a) the black line (b) the white floor
29. 29.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a gyro sensor (b) a sound sensor (c) a camera (d) a touch sensor
30. 30.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
31. 31.🛞 The diameter of a wheel is how many times its radius? (a) 1 (b) 3 (c) 4 (d) 2
32. 32.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) True (b) False
33. 33.🔍 Which sensor helps a robot start on a hand clap? (a) a temperature sensor (b) a sound sensor (c) a light sensor (d) a camera
34. 34.📡 A robot is 130 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 6 seconds (in cm)?
35. 35.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 616 cm?
36. 36.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
37. 37.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
38. 38.⚙️ 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
39. 39.🧭 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 0°. It turns right 120°, then left 120°, then left 45°. What does the gyro read now (0° to 359°)?
40. 40.🧭 A robot faces east. It does: turn around, turn around. Which way does it face now? (a) west (b) south (c) east (d) north

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