Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 518 · 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 robot faces east. It does: turn right, turn around, turn around. Which way does it face now? (a) north (b) west (c) east (d) south
2. 2.🔦 A light sensor reads 30 over black and 80 over white. A good threshold is halfway between them. What is it?
3. 3.🧭 A robot faces east. It does: turn right, turn right, turn left. Which way does it face now? (a) north (b) east (c) south (d) west
4. 4.🔍 Which sensor helps a robot measure a turn angle? (a) a distance sensor (b) a gyro sensor (c) a temperature sensor (d) a touch sensor
5. 5.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 55. What is under the sensor? (a) the white floor (b) the black line
6. 6.⚙️ Which gear set-up gives this: “the output is stronger”? (a) small drives big (b) big drives small
7. 7.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor is stopped. What does the robot do? (a) stays still (b) goes straight back (c) turns right (d) turns left
8. 8.Which job needs a light sensor? (a) know a button is pressed (b) find the brightest spot (c) spot a red ball (d) start on a hand clap
9. 9.🦾 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 up and left (b) points up and right (c) points right (d) points left
10. 10.📡 A robot is 250 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)?
11. 11.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
12. 12.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
13. 13.⚙️ A 15-tooth driver gear turns a 60-tooth driven gear. The driver turns 12 times. How many times does the driven gear turn?
14. 14.🦾 A servo program runs:
    angle = 20
    angle = angle + 30
    angle = angle − 50
    angle = angle + 40
    To what angle (in degrees) does the servo turn in the end?
15. 15.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 2/7 (b) 22/7 (c) 22 (d) 7/22
16. 16.📡 A distance sensor sends a sound pulse and hears the echo 4 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
17. 17.True or false: “the output turns faster” happens when a small gear drives a big one. (a) True (b) False
18. 18.🧭 A robot faces east. It does: turn left, turn around, turn around. Which way does it face now? (a) east (b) south (c) north (d) west
19. 19.🦾 A servo program runs:
    angle = 10
    angle = angle + 60
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
20. 20.True or false: “loose sand dunes” suits tracks. (a) False (b) True
21. 21.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
22. 22.📡 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)?
23. 23.⚙️ An 8-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
24. 24.Which job needs a temperature sensor? (a) warn if motors get hot (b) stay balanced upright (c) find the brightest spot (d) follow a black line
25. 25.🧭 How many degrees is a full turn? (a) 100° (b) 180° (c) 90° (d) 360°
26. 26.🔦 A light sensor reads 40 over black and 90 over white. A good threshold is halfway between them. What is it?
27. 27.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
28. 28.⚙️ DC motor or servo motor: which one drives the wheels? (a) a DC motor (b) a servo motor
29. 29.📡 A robot is 180 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 8 seconds (in cm)?
30. 30.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
31. 31.📡 What does an ultrasonic distance sensor send out? (a) sound too high to hear (b) water drops (c) radio music (d) bright light
32. 32.🦾 A servo program runs:
    angle = 0
    angle = angle + 40
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
33. 33.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
34. 34.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
35. 35.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
36. 36.⬛ A reading below the threshold means the sensor is over … (a) white (b) the sky (c) water (d) black
37. 37.⚙️ The gear fixed to the motor is called the … (a) driver gear (b) tyre (c) driven gear (d) idler gear
38. 38.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
39. 39.⚙️ A 32-tooth driver gear turns an 8-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
40. 40.📡 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?

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