Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 948 · 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 gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times louder (b) 3 times faster (c) 3 times slower (d) 3 times bigger
2. 2.🛞 A robot wheel has a diameter of 35 cm. Using π = 22/7, what is its circumference (in cm)?
3. 3.🦾 A servo program runs:
   angle = 20
   angle = angle + 60
   angle = angle − 30
   angle = angle − 50
   To what angle (in degrees) does the servo turn in the end?
4. 4.🧭 How many degrees is a full turn? (a) 180° (b) 360° (c) 90° (d) 100°
5. 5.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 28. What is under the sensor? (a) the white floor (b) the black line
6. 6.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 20 and the right sensor reads 90. Which sensor is over the black line? (a) neither sensor (b) the right sensor (c) both sensors (d) the left sensor
7. 7.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 44. What is under the sensor? (a) the white floor (b) the black line
8. 8.⚙️ A 10-tooth driver gear turns a 40-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
9. 9.🧭 A robot spins 45° every second. How many seconds does it take to turn 315°?
10. 10.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 5 times (in cm)?
11. 11.📡 A robot is 140 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 7 seconds (in cm)?
12. 12.🛞 Circumference = π × … (a) speed (b) diameter (c) weight (d) radius only
13. 13.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) small drives big (b) big drives small
14. 14.True or false: “a smooth classroom floor” suits propellers. (a) True (b) False
15. 15.🛞 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) turns left (b) goes straight back (c) spins left on the spot (d) goes straight forward
16. 16.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
17. 17.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
18. 18.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
19. 19.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 7 times (in cm)?
20. 20.True or false: to stay balanced upright, use a gyro sensor. (a) True (b) False
21. 21.🧭 What does a gyro help a robot do? (a) see colours (b) turn by exact angles (c) hear claps (d) smell smoke
22. 22.True or false: “stepping over wide gaps” suits legs. (a) False (b) True
23. 23.Which job needs a light sensor? (a) know a button is pressed (b) follow a black line (c) feel a bump into a wall (d) stop before a wall
24. 24.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 3 times (in cm)? =
25. 25.🦾 A servo moves from 110° to 40°. How many degrees does it turn?
26. 26.Which of these suits wheels? (a) hovering over a roof (b) loose sand dunes (c) crossing stepping-stones (d) a long factory floor
27. 27.📡 A distance sensor sends a sound pulse and hears the echo 2 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
28. 28.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
29. 29.🦾 A servo program runs:
    angle = 30
    angle = angle + 60
    angle = angle + 10
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
30. 30.📡 Why do we halve the echo’s total path? (a) it goes there and back (b) sound is slow (c) to make it smaller (d) the sensor is half
31. 31.📡 A robot is 210 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 5 seconds (in cm)?
32. 32.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 72. What is under the sensor? (a) the black line (b) the white floor
33. 33.🛞 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 left on the spot (b) stays still (c) goes straight forward (d) goes straight back
34. 34.📡 A robot is 210 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)?
35. 35.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 7 times (in cm)?
36. 36.🔍 Which sensor helps a robot spot a red ball? (a) a touch sensor (b) a gyro sensor (c) a light sensor (d) a camera
37. 37.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 9 times (in cm)?
38. 38.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) tyres (c) spokes (d) teeth
39. 39.⚙️ A 20-tooth gear drives a 40-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
40. 40.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True

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