Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 485 · 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.🔍 For a robot’s controller, is a sensor an input or an output? (a) a gear (b) an input (c) a wheel (d) an output
2. 2.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 60 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
3. 3.⚙️ 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
4. 4.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) small (fast, weak) (c) zero (d) big (slow and strong)
5. 5.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 28 cm (use π = 22/7). The motor turns 15 times. How far does the robot roll (in cm)?
6. 6.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
7. 7.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 83. What is under the sensor? (a) the black line (b) the white floor
8. 8.🔍 Which sensor helps a robot feel a bump into a wall? (a) a touch sensor (b) a light sensor (c) a temperature sensor (d) a sound sensor
9. 9.🔍 Which sensor helps a robot stop before a wall? (a) a camera (b) a sound sensor (c) a distance sensor (d) a light sensor
10. 10.🧭 A robot spins 90° every second. How many seconds does it take to turn 270°?
11. 11.True or false: “the output is weaker” happens when a small gear drives a big one. (a) False (b) True
12. 12.Which of these suits propellers? (a) loose sand dunes (b) a long factory floor (c) a muddy building site (d) moving under water
13. 13.True or false: “the output is stronger” happens when a small gear drives a big one. (a) False (b) True
14. 14.🛞 A robot wheel has a diameter of 7 cm. Using π = 22/7, what is its circumference (in cm)?
15. 15.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 3 ms (sound: about 34 cm per ms). Does the robot stop? (a) No (b) Yes
16. 16.🛞 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) goes straight back (c) spins left on the spot (d) turns right
17. 17.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 81. What is under the sensor? (a) the black line (b) the white floor
18. 18.📡 A robot stops if an object is closer than 30 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
19. 19.🧭 A robot should turn right 180°, but its gyro shows it turned 183°. How many degrees must it turn back to the left?
20. 20.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how many full turns must they make to roll 924 cm?
21. 21.🛞 Which way of moving suits this best: “stepping over wide gaps”? (a) wheels (b) propellers (c) tracks (d) legs
22. 22.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 60°?
23. 23.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 2 times (in cm)?
24. 24.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
25. 25.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how many full turns must they make to roll 220 cm?
26. 26.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
27. 27.⚙️ DC motor or servo motor: which one spins faster with more V? (a) a servo motor (b) a DC motor
28. 28.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they spin in the air (b) they spread the weight (c) they are round (d) they are shiny
29. 29.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
30. 30.⚙️ A 12-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
31. 31.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
32. 32.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
33. 33.⚙️ An 8-tooth gear drives a 24-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
34. 34.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
35. 35.⚙️ A 12-tooth gear drives a 60-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
36. 36.🧭 How many degrees is a half turn (turn around)? (a) 180° (b) 45° (c) 90° (d) 360°
37. 37.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) tracks (b) wheels (c) legs (d) propellers
38. 38.🛞 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 right on the spot (b) turns left (c) goes straight forward (d) turns right
39. 39.⚙️ What are the bumps round the edge of a gear called? (a) pins (b) spokes (c) tyres (d) teeth
40. 40.📡 An object is 136 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?

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