Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 853 · 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 way of moving suits this best: “loose sand dunes”? (a) wheels (b) propellers (c) tracks (d) legs
2. 2.🛞 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) spins right on the spot
3. 3.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 7/22 (b) 22 (c) 2/7 (d) 22/7
4. 4.⚙️ A 20-tooth gear drives an 80-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
5. 5.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
6. 6.📡 A distance sensor sends a sound pulse and hears the echo 17 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
7. 7.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
8. 8.🛞 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 backward. What does the robot do? (a) stays still (b) turns left (c) goes straight back (d) spins right on the spot
9. 9.🦾 A servo moves from 180° to 140°. How many degrees does it turn?
10. 10.🔢 Gear ratio = driven teeth ÷ … (a) driver teeth (b) motor volts (c) wheel size (d) number of gears
11. 11.⚙️ A 20-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
12. 12.🔍 A light sensor gets the most reflected light from … (a) a dark tunnel (b) a black surface (c) a white surface (d) a black line
13. 13.📡 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 1 second (in cm)?
14. 14.Which of these suits propellers? (a) flying over a field (b) a flat road (c) soft snow (d) a hospital corridor
15. 15.🧭 How many degrees is a full turn? (a) 90° (b) 360° (c) 180° (d) 100°
16. 16.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
17. 17.🧭 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 right 30°, then right 135°, then right 45°. What does the gyro read now (0° to 359°)?
18. 18.Which of these suits legs? (a) flying over a field (b) moving under water (c) a flat road (d) crossing stepping-stones
19. 19.🛞 What is the main difficulty with legs for a robot? (a) too fast on floors (b) they are too cheap (c) they never tire (d) harder to balance
20. 20.True or false: “loose sand dunes” suits legs. (a) True (b) False
21. 21.Which of these suits tracks? (a) a flat road (b) moving under water (c) loose sand dunes (d) hovering over a roof
22. 22.🔍 Which sensor helps a robot warn if motors get hot? (a) a distance sensor (b) a camera (c) a temperature sensor (d) a sound sensor
23. 23.🛞 Which way of moving suits this best: “crossing stepping-stones”? (a) tracks (b) legs (c) propellers (d) wheels
24. 24.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 35 and the right sensor reads 15. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the left sensor (d) the right sensor
25. 25.🔍 Which sensor helps a robot start on a hand clap? (a) a light sensor (b) a sound sensor (c) a touch sensor (d) a gyro sensor
26. 26.📡 An object is 102 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
27. 27.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
28. 28.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
29. 29.⚙️ A 15-tooth driver gear turns a 30-tooth driven gear. The driven gear turns 1 time. How many times did the driver turn?
30. 30.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) propellers (b) wheels (c) legs (d) tracks
31. 31.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 180° (c) 360° (d) 45°
32. 32.🛞 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)? =
33. 33.🛞 How does a two-wheeled robot with no steering turn? (a) it jumps (b) one wheel runs faster (c) it stops for ever (d) it uses a sail
34. 34.🧭 A robot spins 45° every second. How many seconds does it take to turn 135°?
35. 35.🧭 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 30°, then left 45°, then left 135°. What does the gyro read now (0° to 359°)?
36. 36.🧭 A robot should turn right 180°, but its gyro shows it turned 168°. How many degrees must it turn more to the right?
37. 37.🛞 Which way of moving suits this best: “deep mud”? (a) legs (b) wheels (c) tracks (d) propellers
38. 38.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points up and right (b) points up and left (c) points left (d) points straight up
39. 39.⚙️ An 8-tooth gear drives a 40-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
40. 40.🛞 Circumference = π × … (a) weight (b) diameter (c) radius only (d) speed

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