Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 353 · 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: “a flat road”? (a) tracks (b) wheels (c) legs (d) propellers
2. 2.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) propellers (b) tracks (c) wheels (d) legs
3. 3.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) big (slow and strong) (c) zero (d) never important
4. 4.🦾 A servo program runs:
   angle = 120
   angle = angle + 40
   angle = angle − 60
   angle = angle + 10
   angle = angle + 40
   To what angle (in degrees) does the servo turn in the end?
5. 5.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
6. 6.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driven gear turns 3 times. How many times did the driver turn?
7. 7.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
8. 8.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 616 cm?
9. 9.🔍 Which sensor helps a robot read a QR code? (a) a camera (b) a light sensor (c) a touch sensor (d) a distance sensor
10. 10.Which job needs a distance sensor? (a) follow a black line (b) hear a whistle (c) read a QR code (d) stop before a wall
11. 11.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
12. 12.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they look funny (c) they float (d) fast and easy on floors
13. 13.🧭 How many degrees is a full turn? (a) 90° (b) 100° (c) 360° (d) 180°
14. 14.⚙️ A common servo can turn from 0° up to about … (a) 10° (b) 1800° (c) 18° (d) 180°
15. 15.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) number of gears (c) driver teeth (d) wheel size
16. 16.True or false: to warn if motors get hot, use a light sensor. (a) False (b) True
17. 17.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
18. 18.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 1 (c) 2 (d) 4
19. 19.🧭 A robot spins 45° every second. How many seconds does it take to turn 135°?
20. 20.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a track (b) a servo (c) a caster wheel (d) a gear
21. 21.🛞 A robot wheel has a diameter of 35 cm. Using π = 22/7, what is its circumference (in cm)?
22. 22.🛞 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) stays still (b) spins right on the spot (c) turns left (d) goes straight back
23. 23.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) anticlockwise (b) clockwise
24. 24.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
25. 25.True or false: “turns to an exact angle” is true of a servo motor. (a) True (b) False
26. 26.🛞 Which way of moving suits this best: “a muddy building site”? (a) tracks (b) legs (c) propellers (d) wheels
27. 27.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
28. 28.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 81. What is under the sensor? (a) the white floor (b) the black line
29. 29.📡 What does an ultrasonic distance sensor send out? (a) radio music (b) sound too high to hear (c) bright light (d) water drops
30. 30.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 880 cm?
31. 31.🔍 Which sensor helps a robot spot a red ball? (a) a distance sensor (b) a light sensor (c) a sound sensor (d) a camera
32. 32.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) tyre (c) driver gear (d) idler gear
33. 33.📡 Why do we halve the echo’s total path? (a) the sensor is half (b) it goes there and back (c) to make it smaller (d) sound is slow
34. 34.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
35. 35.True or false: “hovering over a roof” suits tracks. (a) True (b) False
36. 36.🛞 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) turns right (b) stays still (c) spins right on the spot (d) spins left on the spot
37. 37.🛞 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) spins right on the spot (b) goes straight back (c) turns left (d) spins left on the spot
38. 38.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 4 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
39. 39.🧭 A robot should turn right 45°, but its gyro shows it turned 58°. How many degrees must it turn back to the left?
40. 40.Which of these suits legs? (a) a hospital corridor (b) flying over a field (c) a field of tall boulders (d) deep mud

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