Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 514 · 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 of these suits propellers? (a) a long factory floor (b) moving under water (c) a field of tall boulders (d) crossing stepping-stones
2. 2.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) small drives big (b) big drives small
3. 3.🔍 Which sensor helps a robot follow a black line? (a) a touch sensor (b) a camera (c) a temperature sensor (d) a light sensor
4. 4.🔍 Which sensor helps a robot know a button is pressed? (a) a gyro sensor (b) a touch sensor (c) a camera (d) a sound sensor
5. 5.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 616 cm?
6. 6.True or false: “a long factory floor” suits wheels. (a) False (b) True
7. 7.⚙️ A 24-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
8. 8.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) shake it (c) add more wheels (d) paint it red
9. 9.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) big (slow and strong) (c) zero (d) small (fast, weak)
10. 10.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 36. What is under the sensor? (a) the white floor (b) the black line
11. 11.Which of these suits tracks? (a) a muddy building site (b) a smooth classroom floor (c) a field of tall boulders (d) a long factory floor
12. 12.🔍 Which sensor helps a robot find the brightest spot? (a) a temperature sensor (b) a gyro sensor (c) a light sensor (d) a distance sensor
13. 13.📡 An object is 289 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
14. 14.⚙️ A 10-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 1 time. How many times did the driver turn?
15. 15.🛞 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 backward. What does the robot do? (a) spins left on the spot (b) goes straight back (c) spins right on the spot (d) goes straight forward
16. 16.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) faster and weaker (c) not at all (d) slower but stronger
17. 17.⚙️ A common servo can turn from 0° up to about … (a) 18° (b) 1800° (c) 10° (d) 180°
18. 18.🛞 Circumference = π × … (a) radius only (b) weight (c) speed (d) diameter
19. 19.⬛ A reading below the threshold means the sensor is over … (a) water (b) black (c) white (d) the sky
20. 20.🧭 What does a gyro help a robot do? (a) see colours (b) smell smoke (c) turn by exact angles (d) hear claps
21. 21.Which job needs a light sensor? (a) measure how far a box is (b) find the brightest spot (c) stop before a wall (d) feel a bump into a wall
22. 22.⚙️ A 15-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
23. 23.🔍 Which sensor helps a robot hear a whistle? (a) a touch sensor (b) a temperature sensor (c) a camera (d) a sound sensor
24. 24.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
25. 25.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 75 and the right sensor reads 80. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the left sensor (d) the right sensor
26. 26.True or false: “holds a set angle” is true of a DC motor. (a) True (b) False
27. 27.📡 An object is 272 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
28. 28.⚙️ A 20-tooth driver gear must make the driven gear turn 4 times slower. How many teeth must the driven gear have?
29. 29.🔍 Which sensor helps a robot spot a red ball? (a) a temperature sensor (b) a touch sensor (c) a camera (d) a gyro sensor
30. 30.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a touch sensor (b) a gyro sensor (c) a camera (d) a sound sensor
31. 31.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a buzzer (b) a servo motor (c) a light sensor (d) a DC motor
32. 32.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) nowhere (b) faster (c) slower (d) backwards
33. 33.🦾 A servo program runs:
    angle = 180
    angle = angle − 30
    angle = angle + 30
    angle = angle − 20
    angle = angle − 50
    To what angle (in degrees) does the servo turn in the end?
34. 34.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 176 cm?
35. 35.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
36. 36.Which of these suits wheels? (a) moving under water (b) crossing stepping-stones (c) a field of tall boulders (d) a long factory floor
37. 37.🧭 How many degrees is a full turn? (a) 180° (b) 360° (c) 100° (d) 90°
38. 38.Which of these suits wheels? (a) crossing stepping-stones (b) loose sand dunes (c) a smooth classroom floor (d) stepping over wide gaps
39. 39.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
40. 40.🧭 A robot faces east. It does: turn around, turn right, turn around. Which way does it face now? (a) west (b) south (c) east (d) north

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