Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 884 · 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 smooth classroom floor”? (a) wheels (b) legs (c) propellers (d) tracks
2. 2.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
3. 3.🧭 A robot keeps turning right by 60° at a time. How many turns make one full circle?
4. 4.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points right (b) points straight up (c) points left (d) points up and right
5. 5.⚙️ A 12-tooth driver gear turns a 60-tooth driven gear. The driven gear turns 2 times. How many times did the driver turn?
6. 6.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a snail (c) a goldfish (d) a cow
7. 7.True or false: to find the brightest spot, use a gyro sensor. (a) False (b) True
8. 8.⚙️ A 40-tooth driver gear turns a 20-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
9. 9.🔦 A light sensor reads 30 over black and 90 over white. A good threshold is halfway between them. What is it?
10. 10.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they float (c) they look funny (d) fast and easy on floors
11. 11.🧭 A robot spins 30° every second. How many seconds does it take to turn 180°?
12. 12.⚙️ 7 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 7 turn? (a) anticlockwise (b) clockwise
13. 13.🦾 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
14. 14.📡 What does an ultrasonic distance sensor send out? (a) bright light (b) radio music (c) sound too high to hear (d) water drops
15. 15.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) under the left sensor (b) far behind it (c) between the two sensors (d) under the right sensor
16. 16.🛞 Which way of moving suits this best: “a muddy building site”? (a) propellers (b) wheels (c) legs (d) tracks
17. 17.Which of these suits wheels? (a) a muddy building site (b) soft snow (c) a flat road (d) loose sand dunes
18. 18.True or false: “moves an arm joint” is true of a DC motor. (a) False (b) True
19. 19.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) big (slow and strong) (b) zero (c) small (fast, weak) (d) never important
20. 20.📡 A robot is 270 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 13 seconds (in cm)?
21. 21.🔍 Which sensor helps a robot know a button is pressed? (a) a sound sensor (b) a touch sensor (c) a distance sensor (d) a temperature sensor
22. 22.⬛ Why does a light sensor read a LOW number over a black line? (a) black soaks up light (b) black is wet (c) black is hot (d) black is loud
23. 23.🧭 How many degrees is a full turn? (a) 90° (b) 180° (c) 100° (d) 360°
24. 24.🛞 A robot wheel has a diameter of 35 cm. Using π = 22/7, what is its circumference (in cm)?
25. 25.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they are round (c) they spin in the air (d) they spread the weight
26. 26.Which of these suits tracks? (a) a flat road (b) crossing stepping-stones (c) loose sand dunes (d) hovering over a roof
27. 27.True or false: “reverses if wires swap” is true of a DC motor. (a) False (b) True
28. 28.Which job needs a distance sensor? (a) warn if motors get hot (b) spot a red ball (c) measure how far a box is (d) measure a turn angle
29. 29.📡 A robot is 140 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 4 seconds (in cm)?
30. 30.⚙️ A 12-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
31. 31.🧭 A robot faces south. It does: turn left, turn left, turn left. Which way does it face now? (a) south (b) north (c) east (d) west
32. 32.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) faster (b) slower (c) backwards (d) nowhere
33. 33.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 3 times (in cm)?
34. 34.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a DC motor (b) a buzzer (c) a light sensor (d) a servo motor
35. 35.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) driver teeth (c) wheel size (d) number of gears
36. 36.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
37. 37.⚙️ A 20-tooth driver gear turns a 60-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
38. 38.Which of these suits propellers? (a) hovering over a roof (b) loose sand dunes (c) soft snow (d) a smooth classroom floor
39. 39.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
40. 40.Which job needs a gyro sensor? (a) know a button is pressed (b) measure how far a box is (c) start on a hand clap (d) measure a turn angle

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