Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 166 · 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: “spins faster with more V” is true of a DC motor. (a) False (b) True
2. 2.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
3. 3.True or false: “spins round and round” is true of a servo motor. (a) False (b) True
4. 4.📡 Which animal finds its way by echoes, like this sensor? (a) a cow (b) a goldfish (c) a bat (d) a snail
5. 5.📡 An object is 170 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
6. 6.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
7. 7.🔍 Which sensor helps a robot stop before a wall? (a) a distance sensor (b) a touch sensor (c) a temperature sensor (d) a camera
8. 8.True or false: “drives the wheels” is true of a servo motor. (a) False (b) True
9. 9.🛞 Which way of moving suits this best: “deep mud”? (a) tracks (b) legs (c) wheels (d) propellers
10. 10.True or false: to spot a red ball, use a temperature sensor. (a) True (b) False
11. 11.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) clockwise (b) anticlockwise
12. 12.📡 An object is 102 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
13. 13.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
14. 14.🛞 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 forward (b) spins left on the spot (c) goes straight back (d) spins right on the spot
15. 15.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 22. What is under the sensor? (a) the white floor (b) the black line
16. 16.True or false: “has just two wires” is true of a DC motor. (a) True (b) False
17. 17.Which of these suits tracks? (a) a smooth classroom floor (b) hovering over a roof (c) deep mud (d) flying over a field
18. 18.🛞 Circumference = π × … (a) diameter (b) radius only (c) weight (d) speed
19. 19.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
20. 20.🦾 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 straight up (b) points left (c) points right (d) points up and right
21. 21.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) idler gear (c) tyre (d) driver gear
22. 22.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) in opposite directions (c) one up, one down (d) they do not turn
23. 23.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) not at all (c) at the same speed (d) faster but weaker
24. 24.🛞 The diameter of a wheel is how many times its radius? (a) 1 (b) 3 (c) 2 (d) 4
25. 25.🔦 A light sensor reads 10 over black and 80 over white. A good threshold is halfway between them. What is it?
26. 26.🛞 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) curves to the left (c) goes straight forward
27. 27.🦾 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 left (b) points up and right (c) points right (d) points straight up
28. 28.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 7. What is under the sensor? (a) the black line (b) the white floor
29. 29.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 44. What is under the sensor? (a) the black line (b) the white floor
30. 30.⚙️ A 20-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 6 times. How many times did the driver turn?
31. 31.🧭 A robot spins 15° every second. How many seconds does it take to turn 300°?
32. 32.🧭 What does a gyro help a robot do? (a) smell smoke (b) turn by exact angles (c) hear claps (d) see colours
33. 33.📡 An object is 204 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
34. 34.🔍 Which sensor helps a robot measure a turn angle? (a) a touch sensor (b) a temperature sensor (c) a gyro sensor (d) a light sensor
35. 35.🧭 A robot faces south. It does: turn left, turn right. Which way does it face now? (a) east (b) north (c) west (d) south
36. 36.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
37. 37.Which of these suits tracks? (a) loose sand dunes (b) a field of tall boulders (c) a smooth classroom floor (d) moving under water
38. 38.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
39. 39.🔦 A light sensor reads 10 over black and 90 over white. A good threshold is halfway between them. What is it?
40. 40.🧭 How many degrees is a right-angle turn? (a) 360° (b) 45° (c) 90° (d) 180°

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