Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 977 · 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 gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
2. 2.🔍 Which sensor helps a robot measure how far a box is? (a) a distance sensor (b) a camera (c) a temperature sensor (d) a touch sensor
3. 3.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spin in the air (b) they spread the weight (c) they are shiny (d) they are round
4. 4.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
5. 5.⬛ In a two-sensor line follower, both sensors see white. Where is the line? (a) under the left sensor (b) far behind it (c) between the two sensors (d) under the right sensor
6. 6.🧭 A robot faces north. It does: turn right, turn left, turn right. Which way does it face now? (a) south (b) west (c) north (d) east
7. 7.🧭 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 180°. It turns left 30°, then right 90°. What does the gyro read now (0° to 359°)?
8. 8.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 50 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
9. 9.⚙️ An 8-tooth gear drives a 32-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
10. 10.⚙️ A 40-tooth driver gear turns an 8-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
11. 11.🧭 What does a gyro help a robot do? (a) see colours (b) smell smoke (c) hear claps (d) turn by exact angles
12. 12.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 34. What is under the sensor? (a) the black line (b) the white floor
13. 13.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
14. 14.🧭 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 180°. It turns right 60°, then right 60°, then left 120°. What does the gyro read now (0° to 359°)?
15. 15.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 42. What is under the sensor? (a) the black line (b) the white floor
16. 16.True or false: “a long factory floor” suits legs. (a) True (b) False
17. 17.⚙️ A common servo can turn from 0° up to about … (a) 180° (b) 10° (c) 18° (d) 1800°
18. 18.⚙️ A 10-tooth driver gear turns a 20-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
19. 19.🛞 Circumference = π × … (a) weight (b) diameter (c) speed (d) radius only
20. 20.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
21. 21.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a servo motor (b) a buzzer (c) a light sensor (d) a DC motor
22. 22.⚙️ A 30-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
23. 23.📡 A robot is 180 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 8 seconds (in cm)?
24. 24.🛞 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) spins left on the spot (b) goes straight forward (c) turns left (d) goes straight back
25. 25.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 42 cm (use π = 22/7). The motor turns 18 times. How far does the robot roll (in cm)?
26. 26.⚙️ Two gears are meshed together. How do they turn? (a) they do not turn (b) one up, one down (c) the same direction (d) in opposite directions
27. 27.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
28. 28.📡 Which object is hardest for an echo sensor to notice? (a) a flat wall (b) a wooden box (c) a soft foam cushion (d) a metal door
29. 29.True or false: “a smooth classroom floor” suits legs. (a) False (b) True
30. 30.🧭 How many degrees is a full turn? (a) 90° (b) 100° (c) 360° (d) 180°
31. 31.🦾 A servo program runs:
    angle = 110
    angle = angle − 20
    angle = angle − 50
    angle = angle + 60
    To what angle (in degrees) does the servo turn in the end?
32. 32.Which job needs a camera? (a) measure how far a box is (b) know a button is pressed (c) read a QR code (d) measure a turn angle
33. 33.🧭 A robot spins 60° every second. How many seconds does it take to turn 240°?
34. 34.📡 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)?
35. 35.🦾 A servo moves from 50° to 110°. How many degrees does it turn?
36. 36.⚙️ DC motor or servo motor: which one holds a set angle? (a) a DC motor (b) a servo motor
37. 37.🧭 A robot faces east. It does: turn around, turn left. Which way does it face now? (a) north (b) south (c) west (d) east
38. 38.🔍 Which sensor is just a tiny switch pressed by a bump? (a) a camera (b) a gyro sensor (c) a touch sensor (d) a sound sensor
39. 39.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
40. 40.🧭 A robot should turn right 90°, but its gyro shows it turned 88°. How many degrees must it turn more to the right?

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