Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 668 · 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 servo moves from 80° to 60°. How many degrees does it turn?
2. 2.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 4 times (in cm)?
3. 3.🧭 A robot keeps turning right by 45° at a time. How many turns make one full circle?
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 270°. It turns left 135°, then right 30°. What does the gyro read now (0° to 359°)?
5. 5.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
6. 6.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
7. 7.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) between the two sensors (b) under the left sensor (c) under the right sensor (d) far behind it
8. 8.⚙️ Which gear set-up gives this: “the output turns faster”? (a) small drives big (b) big drives small
9. 9.⚙️ A 45-tooth driver gear turns a 15-tooth driven gear. The driver turns 2 times. How many times does the driven gear turn?
10. 10.🛞 A robot wheel has a radius of 14 cm. Using π = 22/7, what is its circumference (in cm)?
11. 11.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 1800° (c) 180° (d) 10°
12. 12.🛞 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 right (b) spins right on the spot (c) goes straight forward (d) goes straight back
13. 13.⚙️ 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
14. 14.⚙️ How do you make a DC motor spin the other way? (a) paint it red (b) add more wheels (c) swap its two wires (d) shake it
15. 15.Which job needs a distance sensor? (a) feel a bump into a wall (b) stop before a wall (c) spot a red ball (d) read a QR code
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 forward. What does the robot do? (a) goes straight back (b) spins left on the spot (c) turns left (d) spins right on the spot
17. 17.🔢 A gear ratio of 3 (driven ÷ driver) means the driven gear turns … (a) 3 times louder (b) 3 times slower (c) 3 times bigger (d) 3 times faster
18. 18.🧭 A robot keeps turning right by 120° at a time. How many turns make one full circle?
19. 19.🧭 How many degrees is a half turn (turn around)? (a) 90° (b) 360° (c) 45° (d) 180°
20. 20.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor runs forward. What does the robot do? (a) turns left (b) spins right on the spot (c) goes straight forward (d) turns right
21. 21.True or false: to hear a whistle, use a temperature sensor. (a) False (b) True
22. 22.True or false: to feel a bump into a wall, use a touch sensor. (a) False (b) True
23. 23.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points up and right (b) points right (c) points up and left (d) points straight up
24. 24.📡 Which object is hardest for an echo sensor to notice? (a) a wooden box (b) a flat wall (c) a metal door (d) a soft foam cushion
25. 25.🦾 A servo moves from 10° to 40°. How many degrees does it turn?
26. 26.🛞 The diameter of a wheel is how many times its radius? (a) 3 (b) 4 (c) 1 (d) 2
27. 27.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
28. 28.⚙️ A 12-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
29. 29.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are round (b) they spread the weight (c) they spin in the air (d) they are shiny
30. 30.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
31. 31.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 10 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
32. 32.📡 Which animal finds its way by echoes, like this sensor? (a) a goldfish (b) a snail (c) a cow (d) a bat
33. 33.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 50 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
34. 34.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
35. 35.🔍 Why do robots need sensors? (a) to be heavier (b) to know their world (c) to look colourful (d) to use more power
36. 36.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor
37. 37.📡 A distance sensor sends a sound pulse and hears the echo 17 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
38. 38.⬛ A reading below the threshold means the sensor is over … (a) white (b) water (c) the sky (d) black
39. 39.📡 A robot is 130 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 19 seconds (in cm)?
40. 40.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?

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