Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 719 · 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: “deep mud” suits propellers. (a) True (b) False
2. 2.⚙️ DC motor or servo motor: which one reverses if wires swap? (a) a DC motor (b) a servo motor
3. 3.True or false: “crossing stepping-stones” suits propellers. (a) False (b) True
4. 4.🧭 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 0°. It turns left 30°, then right 60°, then right 90°. What does the gyro read now (0° to 359°)?
5. 5.🧭 A robot spins 30° every second. How many seconds does it take to turn 180°?
6. 6.🛞 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) goes straight forward (b) goes straight back (c) turns right (d) spins right on the spot
7. 7.🛞 A robot wheel has a diameter of 14 cm. Using π = 22/7, what is its circumference (in cm)?
8. 8.🧭 A robot faces north. It does: turn right, turn right. Which way does it face now? (a) south (b) west (c) north (d) east
9. 9.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
10. 10.🛞 Why do tracks (caterpillar belts) grip soft ground well? (a) they are shiny (b) they are round (c) they spin in the air (d) they spread the weight
11. 11.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
12. 12.🛞 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?
13. 13.📡 A robot is 210 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 38 seconds (in cm)?
14. 14.📡 What does an ultrasonic distance sensor send out? (a) sound too high to hear (b) radio music (c) water drops (d) bright light
15. 15.Which job needs a temperature sensor? (a) stay balanced upright (b) warn if motors get hot (c) feel a bump into a wall (d) follow a black line
16. 16.🧭 A robot should turn right 90°, but its gyro shows it turned 104°. How many degrees must it turn back to the left?
17. 17.📡 Why do we halve the echo’s total path? (a) sound is slow (b) the sensor is half (c) to make it smaller (d) it goes there and back
18. 18.📡 An object is 34 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
19. 19.📡 A robot is 210 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 4 seconds (in cm)?
20. 20.Which of these suits legs? (a) a hospital corridor (b) a field of tall boulders (c) a flat road (d) flying over a field
21. 21.🦾 A servo moves from 0° to 120°. How many degrees does it turn?
22. 22.🔍 Which sensor helps a robot know a button is pressed? (a) a temperature sensor (b) a sound sensor (c) a camera (d) a touch sensor
23. 23.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 80 and the right sensor reads 15. Which sensor is over the black line? (a) neither sensor (b) both sensors (c) the left sensor (d) the right sensor
24. 24.🧭 A robot faces east. It does: turn around, turn right, turn around. Which way does it face now? (a) east (b) south (c) west (d) north
25. 25.True or false: “good for a fast fan” happens when a small gear drives a big one. (a) False (b) True
26. 26.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how far does the robot roll when the wheels turn 6 times (in cm)?
27. 27.True or false: “a long factory floor” suits propellers. (a) False (b) True
28. 28.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) big (slow and strong) (c) small (fast, weak) (d) zero
29. 29.🦾 A servo moves from 160° to 0°. How many degrees does it turn?
30. 30.⚙️ A motor changes electrical energy into … (a) movement (b) sound only (c) light (d) water
31. 31.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how many full turns must they make to roll 132 cm?
32. 32.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) driver gear (c) idler gear (d) tyre
33. 33.🛞 Which way of moving suits this best: “flying over a field”? (a) legs (b) wheels (c) tracks (d) propellers
34. 34.⚙️ A 24-tooth driver gear turns a 12-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
35. 35.True or false: “the output is stronger” happens when a big gear drives a small one. (a) False (b) True
36. 36.🧭 A robot keeps turning right by 36° at a time. How many turns make one full circle?
37. 37.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 70 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the left (b) goes straight forward (c) curves to the right
38. 38.🛞 Which way of moving suits this best: “soft snow”? (a) tracks (b) legs (c) wheels (d) propellers
39. 39.⚙️ A 10-tooth driver gear turns a 50-tooth driven gear. The driver turns 30 times. How many times does the driven gear turn?
40. 40.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor is stopped and the right motor is stopped. What does the robot do? (a) stays still (b) goes straight back (c) spins left on the spot (d) goes straight forward

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