Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 882 · 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.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) False (b) True
2. 2.🔍 Which sensor helps a robot hear a whistle? (a) a camera (b) a sound sensor (c) a gyro sensor (d) a distance sensor
3. 3.True or false: to feel a bump into a wall, use a touch sensor. (a) True (b) False
4. 4.⚙️ A 15-tooth driver gear turns a 75-tooth driven gear. The driver turns 40 times. How many times does the driven gear turn?
5. 5.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 and the right sensor reads 25. Which sensor is over the black line? (a) the right sensor (b) both sensors (c) neither sensor (d) the left sensor
6. 6.🧭 A robot should turn right 90°, but its gyro shows it turned 92°. How many degrees must it turn back to the left?
7. 7.⚙️ A 10-tooth driver gear turns a 20-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
8. 8.📡 What does an ultrasonic distance sensor send out? (a) water drops (b) sound too high to hear (c) radio music (d) bright light
9. 9.📡 A robot is 140 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 4 seconds (in cm)?
10. 10.🧭 A robot faces south. It does: turn left, turn left, turn right. Which way does it face now? (a) east (b) south (c) north (d) west
11. 11.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
12. 12.⚙️ A 16-tooth driver gear turns an 8-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
13. 13.🛞 Which way of moving suits this best: “deep mud”? (a) propellers (b) tracks (c) legs (d) wheels
14. 14.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) they do not turn (c) one up, one down (d) the same direction
15. 15.🔍 What does a gyro sensor measure? (a) colour (b) sound (c) temperature (d) turning (rotation)
16. 16.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 1800° (c) 180° (d) 18°
17. 17.🔢 Gear ratio = driven teeth ÷ … (a) wheel size (b) driver teeth (c) number of gears (d) motor volts
18. 18.🛞 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) turns left (b) turns right (c) goes straight back (d) spins left on the spot
19. 19.⬛ The threshold of a light sensor is … (a) the battery size (b) the wheel size (c) the top speed (d) the black/white cut-off
20. 20.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a buzzer (c) a servo motor (d) a DC motor
21. 21.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
22. 22.📡 An object is 153 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
23. 23.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 396 cm?
24. 24.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) never important (c) zero (d) big (slow and strong)
25. 25.True or false: “turns to an exact angle” is true of a DC motor. (a) False (b) True
26. 26.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
27. 27.Which job needs a light sensor? (a) measure how far a box is (b) read a QR code (c) find the brightest spot (d) start on a hand clap
28. 28.📡 A robot is 140 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 2 seconds (in cm)?
29. 29.True or false: to stop before a wall, use a distance sensor. (a) True (b) False
30. 30.🧭 A robot should turn right 180°, but its gyro shows it turned 167°. How many degrees must it turn more to the right?
31. 31.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) slower but stronger (c) faster but weaker (d) not at all
32. 32.🛞 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) turns left (b) spins left on the spot (c) spins right on the spot (d) goes straight forward
33. 33.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
34. 34.True or false: “the output turns slower” happens when a small gear drives a big one. (a) False (b) True
35. 35.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 44. What is under the sensor? (a) the white floor (b) the black line
36. 36.🛞 Which way of moving suits this best: “flying over a field”? (a) tracks (b) legs (c) propellers (d) wheels
37. 37.⚙️ 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 big driver gear (b) a small driver gear
38. 38.🧭 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 60°, then right 120°. What does the gyro read now (0° to 359°)?
39. 39.⚙️ A 15-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
40. 40.⬛ Why does a light sensor read a LOW number over a black line? (a) black soaks up light (b) black is wet (c) black is hot (d) black is loud

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