Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 27 · 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 robot should turn right 45°, but its gyro shows it turned 52°. How many degrees must it turn back to the left?
2. 2.🔍 Which sensor helps a robot read a QR code? (a) a touch sensor (b) a gyro sensor (c) a sound sensor (d) a camera
3. 3.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 40 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
4. 4.🛞 Which way of moving suits this best: “hovering over a roof”? (a) tracks (b) wheels (c) propellers (d) legs
5. 5.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 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
6. 6.📡 A robot is 230 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 7 seconds (in cm)?
7. 7.True or false: to read a QR code, use a camera. (a) True (b) False
8. 8.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 2 times (in cm)? =
9. 9.🛞 Which way of moving suits this best: “a long factory floor”? (a) tracks (b) legs (c) propellers (d) wheels
10. 10.True or false: “has just two wires” is true of a servo motor. (a) True (b) False
11. 11.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
12. 12.🛞 A robot wheel has a diameter of 21 cm. Using π = 22/7, what is its circumference (in cm)?
13. 13.🔢 Gear ratio = driven teeth ÷ … (a) number of gears (b) driver teeth (c) motor volts (d) wheel size
14. 14.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 55. What is under the sensor? (a) the white floor (b) the black line
15. 15.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) spokes (c) pins (d) teeth
16. 16.True or false: “a field of tall boulders” suits legs. (a) True (b) False
17. 17.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
18. 18.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 40 and the right sensor reads 30. Which sensor is over the black line? (a) the left sensor (b) the right sensor (c) neither sensor (d) both sensors
19. 19.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are round (b) they spin in the air (c) they spread the weight (d) they are shiny
20. 20.📡 A robot is 280 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 27 seconds (in cm)?
21. 21.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a caster wheel (b) a gear (c) a track (d) a servo
22. 22.Which job needs a touch sensor? (a) spot a red ball (b) know a button is pressed (c) warn if motors get hot (d) hear a whistle
23. 23.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
24. 24.⚙️ A motor makes 400 turns a minute with a 20-tooth gear on it. That gear drives an 80-tooth gear. How many turns a minute does the 80-tooth gear make?
25. 25.⚙️ A 20-tooth driver gear turns a 100-tooth driven gear. The driver turns 30 times. How many times does the driven gear turn?
26. 26.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a servo motor (b) a DC motor
27. 27.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
28. 28.📡 Which object is hardest for an echo sensor to notice? (a) a metal door (b) a flat wall (c) a soft foam cushion (d) a wooden box
29. 29.True or false: “moving under water” suits tracks. (a) True (b) False
30. 30.⚙️ A motor makes 60 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?
31. 31.Which job needs a gyro sensor? (a) measure a turn angle (b) feel a bump into a wall (c) start on a hand clap (d) hear a whistle
32. 32.🔍 Which sensor helps a robot spot a red ball? (a) a gyro sensor (b) a distance sensor (c) a camera (d) a sound sensor
33. 33.Which job needs a touch sensor? (a) feel a bump into a wall (b) start on a hand clap (c) warn if motors get hot (d) find the brightest spot
34. 34.🔍 Which sensor helps a robot follow a black line? (a) a gyro sensor (b) a temperature sensor (c) a distance sensor (d) a light sensor
35. 35.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) zero (b) never important (c) big (slow and strong) (d) small (fast, weak)
36. 36.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 7 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
37. 37.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) slower but stronger (c) faster and weaker (d) at the same speed
38. 38.True or false: “turns to an exact angle” is true of a servo motor. (a) False (b) True
39. 39.🔦 A light sensor reads 30 over black and 60 over white. A good threshold is halfway between them. What is it?
40. 40.⚙️ A 10-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower

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