Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 682 · 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.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
2. 2.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 30. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) neither sensor (d) the left sensor
3. 3.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
4. 4.📡 An object is 34 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
5. 5.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
6. 6.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 440 cm?
7. 7.🧭 A robot spins 15° every second. How many seconds does it take to turn 150°?
8. 8.True or false: to find the brightest spot, use a light sensor. (a) False (b) True
9. 9.🧭 A robot faces east. It does: turn right, turn around, turn right. Which way does it face now? (a) east (b) north (c) west (d) south
10. 10.True or false: to spot a red ball, use a gyro sensor. (a) True (b) False
11. 11.Which job needs a light sensor? (a) feel a bump into a wall (b) stop before a wall (c) follow a black line (d) spot a red ball
12. 12.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 360° (c) 180° (d) 45°
13. 13.🧭 A robot should turn right 90°, but its gyro shows it turned 89°. How many degrees must it turn more to the right?
14. 14.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 180°. Where does the arm point? (a) points right (b) points up and right (c) points left (d) points straight up
15. 15.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 10. Which sensor is over the black line? (a) the left sensor (b) neither sensor (c) the right sensor (d) both sensors
16. 16.📡 A distance sensor sends a sound pulse and hears the echo 9 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
17. 17.⚙️ A 12-tooth gear drives a 48-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
18. 18.🧭 A robot spins 30° every second. How many seconds does it take to turn 270°?
19. 19.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
20. 20.True or false: “a muddy building site” suits tracks. (a) False (b) True
21. 21.🔍 What does a gyro sensor measure? (a) colour (b) turning (rotation) (c) temperature (d) sound
22. 22.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
23. 23.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 2 times. How far does the robot roll (in cm)?
24. 24.True or false: to stop before a wall, use a camera. (a) True (b) False
25. 25.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a DC motor (b) a servo motor
26. 26.True or false: to hear a whistle, use a sound sensor. (a) True (b) False
27. 27.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
28. 28.🔦 A light sensor reads 30 over black and 60 over white. A good threshold is halfway between them. What is it?
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 40-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?
31. 31.🧭 A robot spins 30° every second. How many seconds does it take to turn 30°?
32. 32.🧭 A robot spins 15° every second. How many seconds does it take to turn 60°?
33. 33.📡 An object is 51 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
34. 34.🧭 A robot faces north. It does: turn right, turn around, turn left, turn right. Which way does it face now? (a) east (b) west (c) south (d) north
35. 35.🔦 A light sensor reads 10 over black and 60 over white. A good threshold is halfway between them. What is it?
36. 36.True or false: to stay balanced upright, use a gyro sensor. (a) True (b) False
37. 37.🛞 Which way of moving suits this best: “deep mud”? (a) tracks (b) wheels (c) propellers (d) legs
38. 38.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 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
39. 39.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor runs backward. What does the robot do? (a) stays still (b) turns right (c) goes straight forward (d) spins right on the spot
40. 40.🧭 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 135°, then left 45°. What does the gyro read now (0° to 359°)?

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