Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 279 · 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.🛞 Circumference = π × … (a) speed (b) weight (c) radius only (d) diameter
2. 2.🔍 Which sensor helps a robot measure how far a box is? (a) a distance sensor (b) a gyro sensor (c) a touch sensor (d) a temperature sensor
3. 3.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) small (fast, weak) (b) zero (c) big (slow and strong) (d) never important
4. 4.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
5. 5.📡 A robot is 270 cm from a wall and drives straight at it at 20 cm per second. How far from the wall is it after 10 seconds (in cm)?
6. 6.📡 A robot stops if an object is closer than 100 cm. Its distance sensor hears the echo after 8 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
7. 7.⚙️ A 20-tooth gear drives an 80-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
8. 8.🧭 A robot should turn right 90°, but its gyro shows it turned 88°. How many degrees must it turn more to the right?
9. 9.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
10. 10.🛞 What is the main difficulty with legs for a robot? (a) they never tire (b) they are too cheap (c) too fast on floors (d) harder to balance
11. 11.⚙️ A 12-tooth driver gear must make the driven gear turn 5 times slower. How many teeth must the driven gear have?
12. 12.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 150°?
13. 13.Which of these suits tracks? (a) a smooth classroom floor (b) crossing stepping-stones (c) soft snow (d) a field of tall boulders
14. 14.🛞 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) goes straight forward (b) curves to the right (c) curves to the left
15. 15.📡 Which animal finds its way by echoes, like this sensor? (a) a bat (b) a cow (c) a goldfish (d) a snail
16. 16.🧭 A robot spins 30° every second. How many seconds does it take to turn 300°?
17. 17.Which job needs a touch sensor? (a) spot a red ball (b) feel a bump into a wall (c) stop before a wall (d) hear a whistle
18. 18.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 85 and the right sensor reads 35. Which sensor is over the black line? (a) the right sensor (b) the left sensor (c) both sensors (d) neither sensor
19. 19.⚙️ A motor makes 200 turns a minute with a 12-tooth gear on it. That gear drives a 48-tooth gear. How many turns a minute does the 48-tooth gear make?
20. 20.True or false: to measure a turn angle, use a gyro sensor. (a) False (b) True
21. 21.🔍 Which sensor helps a robot start on a hand clap? (a) a temperature sensor (b) a touch sensor (c) a sound sensor (d) a gyro sensor
22. 22.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 34 cm (c) 1 km (d) 340 cm
23. 23.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 10 and the right sensor reads 30. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) the right sensor (d) both sensors
24. 24.📡 A distance sensor sends a sound pulse and hears the echo 13 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
25. 25.⚙️ A motor makes 200 turns a minute with an 8-tooth gear on it. That gear drives a 40-tooth gear. How many turns a minute does the 40-tooth gear make?
26. 26.📡 An object is 221 cm from a distance sensor. Sound travels about 34 cm every millisecond. After how many milliseconds does the echo come back?
27. 27.🔢 Gear ratio = driven teeth ÷ … (a) wheel size (b) driver teeth (c) motor volts (d) number of gears
28. 28.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 396 cm?
29. 29.🛞 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) goes straight back (b) spins right on the spot (c) turns left (d) turns right
30. 30.🦾 A servo moves from 140° to 50°. How many degrees does it turn?
31. 31.⚙️ A 12-tooth driver gear turns a 36-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
32. 32.⚙️ How do you make a DC motor spin the other way? (a) swap its two wires (b) add more wheels (c) paint it red (d) shake it
33. 33.🧭 A robot faces south. It does: turn around, turn around. Which way does it face now? (a) south (b) east (c) west (d) north
34. 34.True or false: “a flat road” suits wheels. (a) True (b) False
35. 35.🧭 How many degrees is a full turn? (a) 180° (b) 100° (c) 90° (d) 360°
36. 36.🛞 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 right (c) goes straight back (d) stays still
37. 37.⚙️ A 20-tooth driver gear turns an 80-tooth driven gear. The driver turns 24 times. How many times does the driven gear turn?
38. 38.True or false: to find the brightest spot, use a touch sensor. (a) False (b) True
39. 39.Which of these suits wheels? (a) loose sand dunes (b) a long factory floor (c) deep mud (d) flying over a field
40. 40.🛞 A robot’s wheels have a diameter of 6 cm. Using π = 3.14, how far does the robot roll when the wheels turn 4 times (in cm)? =

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids