Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 347 · 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.True or false: “the output is weaker” happens when a big gear drives a small one. (a) True (b) False
2. 2.🧭 A robot faces west. It does: turn right, turn around, turn right. Which way does it face now? (a) east (b) south (c) west (d) north
3. 3.📡 A robot is 180 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 10 seconds (in cm)?
4. 4.🧭 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 left 120°, then left 90°, then right 45°. What does the gyro read now (0° to 359°)?
5. 5.🛞 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)?
6. 6.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 132 cm?
7. 7.⚙️ DC motor or servo motor: which one moves an arm joint? (a) a servo motor (b) a DC motor
8. 8.🛞 The diameter of a wheel is how many times its radius? (a) 4 (b) 3 (c) 1 (d) 2
9. 9.Which of these suits wheels? (a) a long factory floor (b) soft snow (c) stepping over wide gaps (d) hovering over a roof
10. 10.🧭 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 270°. It turns right 60°, then left 135°. What does the gyro read now (0° to 359°)?
11. 11.🦾 A servo moves from 90° to 0°. How many degrees does it turn?
12. 12.Which job needs a sound sensor? (a) find the brightest spot (b) warn if motors get hot (c) read a QR code (d) start on a hand clap
13. 13.📡 A robot is 240 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 41 seconds (in cm)?
14. 14.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
15. 15.🛞 Circumference = π × … (a) diameter (b) weight (c) radius only (d) speed
16. 16.🛞 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) turns right (b) goes straight forward (c) turns left (d) goes straight back
17. 17.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
18. 18.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
19. 19.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 10. Which sensor is over the black line? (a) both sensors (b) the right sensor (c) neither sensor (d) the left sensor
20. 20.True or false: to stay balanced upright, use a sound sensor. (a) True (b) False
21. 21.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driver turns 40 times. How many times does the driven gear turn?
22. 22.True or false: “a long factory floor” suits legs. (a) False (b) True
23. 23.⚙️ A 32-tooth driver gear turns an 8-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
24. 24.🧭 A robot should turn right 180°, but its gyro shows it turned 188°. How many degrees must it turn back to the left?
25. 25.🔢 Gear ratio = driven teeth ÷ … (a) wheel size (b) driver teeth (c) number of gears (d) motor volts
26. 26.⚙️ DC motor or servo motor: which one turns to an exact angle? (a) a servo motor (b) a DC motor
27. 27.⚙️ DC motor or servo motor: which one has just two wires? (a) a DC motor (b) a servo motor
28. 28.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 65. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the right sensor (d) the left sensor
29. 29.🛞 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 backward. What does the robot do? (a) spins right on the spot (b) goes straight forward (c) spins left on the spot (d) stays still
30. 30.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
31. 31.Which of these suits propellers? (a) a muddy building site (b) a smooth classroom floor (c) moving under water (d) a field of tall boulders
32. 32.🦾 A servo program runs:
    angle = 80
    angle = angle − 40
    angle = angle + 30
    angle = angle − 30
    To what angle (in degrees) does the servo turn in the end?
33. 33.🧭 A robot spins 15° every second. How many seconds does it take to turn 120°?
34. 34.Which job needs a distance sensor? (a) read a QR code (b) measure a turn angle (c) stop before a wall (d) follow a black line
35. 35.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a buzzer (b) a DC motor (c) a servo motor (d) a fan
36. 36.⚙️ A 10-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
37. 37.⚙️ A motor makes 200 turns a minute with a 12-tooth gear on it. That gear drives a 24-tooth gear. How many turns a minute does the 24-tooth gear make?
38. 38.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 176 cm?
39. 39.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
40. 40.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 135°. Where does the arm point? (a) points left (b) points up and left (c) points right (d) points up and right

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