Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 817 · 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.📡 An object is 136 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
2. 2.🧭 A robot should turn right 45°, but its gyro shows it turned 40°. How many degrees must it turn more to the right?
3. 3.True or false: to stay balanced upright, use a temperature sensor. (a) True (b) False
4. 4.🔍 Why do robots need sensors? (a) to look colourful (b) to know their world (c) to be heavier (d) to use more power
5. 5.🔦 A light sensor reads 40 over black and 80 over white. A good threshold is halfway between them. What is it?
6. 6.Which of these suits wheels? (a) moving under water (b) a smooth classroom floor (c) a muddy building site (d) flying over a field
7. 7.🦾 A servo program runs:
   angle = 160
   angle = angle − 40
   angle = angle + 40
   To what angle (in degrees) does the servo turn in the end?
8. 8.🦾 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 right (b) points left (c) points up and left (d) points straight up
9. 9.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
10. 10.Which of these suits propellers? (a) a long factory floor (b) flying over a field (c) a muddy building site (d) a flat road
11. 11.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) driver teeth (c) wheel size (d) number of gears
12. 12.📡 An object is 272 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
13. 13.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) pins (d) tyres
14. 14.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spin in the air (b) they are round (c) they spread the weight (d) they are shiny
15. 15.🔍 Which sensor helps a robot read a QR code? (a) a gyro sensor (b) a temperature sensor (c) a sound sensor (d) a camera
16. 16.🛞 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 left on the spot (b) stays still (c) goes straight forward (d) turns left
17. 17.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
18. 18.Which job needs a gyro sensor? (a) spot a red ball (b) find the brightest spot (c) measure a turn angle (d) warn if motors get hot
19. 19.⚙️ An 8-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
20. 20.🦾 A servo moves from 130° to 110°. How many degrees does it turn?
21. 21.🧭 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 0°. It turns right 120°, then left 60°, then left 30°. What does the gyro read now (0° to 359°)?
22. 22.🛞 A robot wheel has a diameter of 28 cm. Using π = 22/7, what is its circumference (in cm)?
23. 23.📡 An object is 119 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
24. 24.🛞 Which way of moving suits this best: “a muddy building site”? (a) tracks (b) propellers (c) wheels (d) legs
25. 25.🛞 Circumference = π × … (a) radius only (b) speed (c) diameter (d) weight
26. 26.⚙️ A 15-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
27. 27.⚙️ A 16-tooth driver gear turns an 8-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
28. 28.🔍 Which sensor helps a robot warn if motors get hot? (a) a touch sensor (b) a distance sensor (c) a temperature sensor (d) a light sensor
29. 29.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driver turns 21 times. How many times does the driven gear turn?
30. 30.🧭 A robot should turn right 45°, but its gyro shows it turned 55°. How many degrees must it turn back to the left?
31. 31.📡 What does an ultrasonic distance sensor send out? (a) bright light (b) sound too high to hear (c) water drops (d) radio music
32. 32.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
33. 33.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 180° (c) 18° (d) 10°
34. 34.🛞 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) spins right on the spot (b) turns left (c) turns right (d) stays still
35. 35.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
36. 36.⚙️ DC motor or servo motor: which one holds a set angle? (a) a servo motor (b) a DC motor
37. 37.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) faster (b) nowhere (c) backwards (d) slower
38. 38.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 60 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
39. 39.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
40. 40.⚙️ A motor makes 180 turns a minute with an 8-tooth gear on it. That gear drives a 16-tooth gear. How many turns a minute does the 16-tooth gear make?

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