Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 193 · 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 job needs a light sensor? (a) hear a whistle (b) feel a bump into a wall (c) stop before a wall (d) find the brightest spot
2. 2.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =
3. 3.🔍 For a robot’s controller, is a sensor an input or an output? (a) an output (b) a wheel (c) an input (d) a gear
4. 4.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a snail (c) a cow (d) a goldfish
5. 5.⚙️ A motor makes 550 turns a minute with an 8-tooth gear on it. That gear drives a 40-tooth gear. How many turns a minute does the 40-tooth gear make?
6. 6.True or false: “hovering over a roof” suits wheels. (a) False (b) True
7. 7.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 340 cm (c) 1 km (d) 34 cm
8. 8.🧭 How many degrees is a right-angle turn? (a) 45° (b) 360° (c) 90° (d) 180°
9. 9.⬛ A reading below the threshold means the sensor is over … (a) the sky (b) white (c) black (d) water
10. 10.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 100 turns a minute and the right wheel at 20 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the left (c) curves to the right
11. 11.True or false: “a smooth classroom floor” suits propellers. (a) False (b) True
12. 12.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 176 cm?
13. 13.⚙️ A big gear drives a small gear. The small gear turns … (a) at the same speed (b) slower but stronger (c) faster but weaker (d) not at all
14. 14.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
15. 15.Which job needs a light sensor? (a) measure a turn angle (b) follow a black line (c) stop before a wall (d) measure how far a box is
16. 16.True or false: to read a QR code, use a touch sensor. (a) False (b) True
17. 17.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
18. 18.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
19. 19.True or false: “stepping over wide gaps” suits tracks. (a) True (b) False
20. 20.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
21. 21.⚙️ A 12-tooth driver gear turns a 24-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
22. 22.🧭 How many degrees is a full turn? (a) 90° (b) 100° (c) 180° (d) 360°
23. 23.⚙️ Which motor is best for turning a robot arm to exactly 45°? (a) a servo motor (b) a buzzer (c) a DC motor (d) a fan
24. 24.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 5 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
25. 25.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 6 times. How far does the robot roll (in cm)?
26. 26.Which of these suits legs? (a) stepping over wide gaps (b) moving under water (c) loose sand dunes (d) a smooth classroom floor
27. 27.📡 A distance sensor sends a sound pulse and hears the echo 1 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 moves an arm joint? (a) a DC motor (b) a servo motor
29. 29.⚙️ A motor changes electrical energy into … (a) sound only (b) light (c) movement (d) water
30. 30.🧭 A robot faces east. It does: turn around, turn right, turn left, turn right. Which way does it face now? (a) east (b) west (c) north (d) south
31. 31.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
32. 32.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
33. 33.🧭 A robot should turn right 45°, but its gyro shows it turned 34°. How many degrees must it turn more to the right?
34. 34.🔦 A light sensor reads below 50 over a black line and above 50 over the white floor. It reads 63. What is under the sensor? (a) the black line (b) the white floor
35. 35.🛞 Which way of moving suits this best: “a smooth classroom floor”? (a) tracks (b) propellers (c) legs (d) wheels
36. 36.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
37. 37.📡 A distance sensor sends a sound pulse and hears the echo 19 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
38. 38.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 10 times (in cm)?
39. 39.True or false: “the output turns slower” happens when a big gear drives a small one. (a) True (b) False
40. 40.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 6 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No

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