Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 974 · 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 stops if an object is closer than 60 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
2. 2.⚙️ A 15-tooth driver gear turns a 45-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
3. 3.🧭 How many degrees is a half turn (turn around)? (a) 180° (b) 360° (c) 45° (d) 90°
4. 4.📡 A distance sensor sends a sound pulse and hears the echo 3 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
5. 5.True or false: “reverses if wires swap” is true of a DC motor. (a) True (b) False
6. 6.🛞 Which way of moving suits this best: “deep mud”? (a) propellers (b) tracks (c) legs (d) wheels
7. 7.⚙️ A 32-tooth driver gear turns an 8-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
8. 8.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
9. 9.🧭 How many degrees is a full turn? (a) 360° (b) 180° (c) 90° (d) 100°
10. 10.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
11. 11.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 2 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
12. 12.🧭 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 120°, then right 180°. What does the gyro read now (0° to 359°)?
13. 13.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 80 turns a minute. What does the robot do? (a) curves to the right (b) curves to the left (c) goes straight forward
14. 14.⚙️ A 36-tooth driver gear turns a 12-tooth driven gear. The driver turns 6 times. How many times does the driven gear turn?
15. 15.True or false: to start on a hand clap, use a sound sensor. (a) True (b) False
16. 16.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 352 cm?
17. 17.🛞 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)? =
18. 18.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 90 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
19. 19.Which of these suits propellers? (a) hovering over a roof (b) loose sand dunes (c) a muddy building site (d) a field of tall boulders
20. 20.📡 A robot is 110 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 1 second (in cm)?
21. 21.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
22. 22.⚙️ A big gear drives a small gear. The small gear turns … (a) faster but weaker (b) slower but stronger (c) at the same speed (d) not at all
23. 23.🔍 Which sensor helps a robot start on a hand clap? (a) a touch sensor (b) a sound sensor (c) a distance sensor (d) a camera
24. 24.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
25. 25.📡 A robot is 160 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 3 seconds (in cm)?
26. 26.⬛ A reading below the threshold means the sensor is over … (a) white (b) the sky (c) black (d) water
27. 27.🔍 Which sensor helps a robot know a button is pressed? (a) a distance sensor (b) a gyro sensor (c) a camera (d) a touch sensor
28. 28.🔍 Why do robots need sensors? (a) to use more power (b) to be heavier (c) to look colourful (d) to know their world
29. 29.⚙️ An 8-tooth driver gear turns a 24-tooth driven gear. The driver turns 15 times. How many times does the driven gear turn?
30. 30.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) slower (b) nowhere (c) faster (d) backwards
31. 31.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its radius (c) its weight (d) its circumference
32. 32.Which of these suits wheels? (a) hovering over a roof (b) a hospital corridor (c) moving under water (d) soft snow
33. 33.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a DC motor (b) a servo motor
34. 34.🔢 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)
35. 35.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs forward and the right motor is stopped. What does the robot do? (a) spins left on the spot (b) goes straight back (c) turns right (d) turns left
36. 36.🛞 Which way of moving suits this best: “a long factory floor”? (a) legs (b) propellers (c) tracks (d) wheels
37. 37.📡 A robot is 250 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 39 seconds (in cm)?
38. 38.📡 A distance sensor sends a sound pulse and hears the echo 2 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
39. 39.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
40. 40.🧭 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 90°. It turns right 180°, then right 45°. What does the gyro read now (0° to 359°)?

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