Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 293 · 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.🛞 How far does a wheel roll in one full turn? (a) its circumference (b) its radius (c) its diameter (d) its weight
2. 2.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
3. 3.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
4. 4.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) wheel size (c) number of gears (d) driver teeth
5. 5.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 63. What is under the sensor? (a) the white floor (b) the black line
6. 6.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a snail (c) a cow (d) a goldfish
7. 7.🛞 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 left (c) goes straight forward (d) spins left on the spot
8. 8.True or false: to read a QR code, use a gyro sensor. (a) False (b) True
9. 9.⚙️ DC motor or servo motor: which one has just two wires? (a) a servo motor (b) a DC motor
10. 10.🔍 Which sensor helps a robot feel a bump into a wall? (a) a gyro sensor (b) a distance sensor (c) a sound sensor (d) a touch sensor
11. 11.🧭 A robot faces north. It does: turn around, turn around, turn left, turn around. Which way does it face now? (a) south (b) north (c) west (d) east
12. 12.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 85 and the right sensor reads 65. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
14. 14.📡 Which object is hardest for an echo sensor to notice? (a) a flat wall (b) a wooden box (c) a soft foam cushion (d) a metal door
15. 15.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a servo motor (b) a DC motor
16. 16.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) big (slow and strong) (b) never important (c) small (fast, weak) (d) zero
17. 17.True or false: to stay balanced upright, use a gyro sensor. (a) False (b) True
18. 18.🔍 Why do robots need sensors? (a) to know their world (b) to use more power (c) to be heavier (d) to look colourful
19. 19.📡 What does an ultrasonic distance sensor send out? (a) radio music (b) bright light (c) water drops (d) sound too high to hear
20. 20.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) at the same speed (c) faster and weaker (d) slower but stronger
21. 21.Which of these suits propellers? (a) stepping over wide gaps (b) a flat road (c) moving under water (d) a smooth classroom floor
22. 22.🧭 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 90°. What does the gyro read now (0° to 359°)?
23. 23.True or false: to hear a whistle, use a sound sensor. (a) False (b) True
24. 24.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
25. 25.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
26. 26.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 72. What is under the sensor? (a) the black line (b) the white floor
27. 27.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
28. 28.🧭 What does a gyro help a robot do? (a) smell smoke (b) see colours (c) hear claps (d) turn by exact angles
29. 29.🛞 Which way of moving suits this best: “flying over a field”? (a) legs (b) tracks (c) propellers (d) wheels
30. 30.⚙️ 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 small driver gear (b) a big driver gear
31. 31.🔍 Which sensor helps a robot read a QR code? (a) a temperature sensor (b) a camera (c) a sound sensor (d) a distance sensor
32. 32.🧭 A robot faces south. It does: turn left, turn left, turn around. Which way does it face now? (a) north (b) east (c) south (d) west
33. 33.True or false: to stop before a wall, use a sound sensor. (a) False (b) True
34. 34.True or false: to read a QR code, use a camera. (a) True (b) False
35. 35.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
36. 36.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
37. 37.⚙️ A motor makes 330 turns a minute with a 12-tooth gear on it. That gear drives a 36-tooth gear. How many turns a minute does the 36-tooth gear make?
38. 38.🔍 Which sensor helps a robot warn if motors get hot? (a) a temperature sensor (b) a gyro sensor (c) a sound sensor (d) a touch sensor
39. 39.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) the same direction (d) in opposite directions
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 65 and the right sensor reads 35. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor

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