Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 752 · 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.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a track (b) a servo (c) a gear (d) a caster wheel
2. 2.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 65 and the right sensor reads 25. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the left sensor (d) the right sensor
3. 3.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 21 cm (use π = 22/7). The motor turns 10 times. How far does the robot roll (in cm)?
4. 4.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 18 times. How far does the robot roll (in cm)?
5. 5.📡 A robot is 180 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 1 second (in cm)?
6. 6.⚙️ A motor changes electrical energy into … (a) light (b) sound only (c) water (d) movement
7. 7.📡 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?
8. 8.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) wheel size (c) number of gears (d) driver teeth
9. 9.⬛ Why does a light sensor read a LOW number over a black line? (a) black is wet (b) black is hot (c) black soaks up light (d) black is loud
10. 10.Which of these suits wheels? (a) a muddy building site (b) a hospital corridor (c) hovering over a roof (d) loose sand dunes
11. 11.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
12. 12.🧭 A robot spins 15° every second. How many seconds does it take to turn 135°?
13. 13.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spread the weight (b) they are shiny (c) they spin in the air (d) they are round
14. 14.🛞 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 12 times. How far does the robot roll (in cm)?
15. 15.🔍 Which sensor helps a robot measure a turn angle? (a) a temperature sensor (b) a camera (c) a distance sensor (d) a gyro sensor
16. 16.True or false: “moving under water” suits propellers. (a) True (b) False
17. 17.🦾 A servo program runs:
    angle = 50
    angle = angle + 60
    angle = angle − 30
    angle = angle − 20
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
18. 18.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 340 cm (b) 1 km (c) 34 cm (d) 3 cm
19. 19.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
20. 20.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) spins right on the spot (b) goes straight back (c) goes straight forward (d) turns left
21. 21.True or false: “loose sand dunes” suits legs. (a) True (b) False
22. 22.🧭 How many degrees is a full turn? (a) 100° (b) 90° (c) 360° (d) 180°
23. 23.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 7 cm (use π = 22/7). The motor turns 4 times. How far does the robot roll (in cm)?
24. 24.🛞 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)? =
25. 25.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
26. 26.🧭 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 left 135°, then left 180°. What does the gyro read now (0° to 359°)?
27. 27.True or false: “a field of tall boulders” suits legs. (a) True (b) False
28. 28.Which of these suits wheels? (a) a long factory floor (b) flying over a field (c) a muddy building site (d) soft snow
29. 29.🛞 The diameter of a wheel is how many times its radius? (a) 1 (b) 4 (c) 3 (d) 2
30. 30.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
31. 31.Which job needs a gyro sensor? (a) know a button is pressed (b) measure a turn angle (c) spot a red ball (d) hear a whistle
32. 32.🛞 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 6 times. How far does the robot roll (in cm)?
33. 33.🔍 Which sensor helps a robot hear a whistle? (a) a sound sensor (b) a light sensor (c) a camera (d) a distance sensor
34. 34.🔦 A light sensor reads below 40 over a black line and above 40 over the white floor. It reads 19. What is under the sensor? (a) the white floor (b) the black line
35. 35.🧭 A robot should turn right 180°, but its gyro shows it turned 177°. How many degrees must it turn more to the right?
36. 36.⚙️ A motor makes 250 turns a minute with a 10-tooth gear on it. That gear drives a 50-tooth gear. How many turns a minute does the 50-tooth gear make?
37. 37.⚙️ A 10-tooth gear drives a 30-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
38. 38.🛞 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 forward. What does the robot do? (a) goes straight back (b) spins right on the spot (c) stays still (d) goes straight forward
39. 39.⚙️ 6 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 6 turn? (a) clockwise (b) anticlockwise
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 20. Which sensor is over the black line? (a) the left sensor (b) neither sensor (c) both sensors (d) the right sensor

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids