Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 833 · 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: “a flat road” suits propellers. (a) True (b) False
2. 2.⚙️ DC motor or servo motor: which one has a signal wire? (a) a servo motor (b) a DC motor
3. 3.🧭 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 90°, then left 135°. What does the gyro read now (0° to 359°)?
4. 4.📡 Why do we halve the echo’s total path? (a) to make it smaller (b) the sensor is half (c) sound is slow (d) it goes there and back
5. 5.True or false: to find the brightest spot, use a temperature sensor. (a) True (b) False
6. 6.⚙️ A 60-tooth driver gear turns a 15-tooth driven gear. The driver turns 1 time. How many times does the driven gear turn?
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 90°. It turns left 60°, then left 135°. What does the gyro read now (0° to 359°)?
8. 8.🦾 A servo program runs:
   angle = 80
   angle = angle + 40
   angle = angle − 50
   angle = angle + 40
   angle = angle − 50
   To what angle (in degrees) does the servo turn in the end?
9. 9.🛞 A robot’s wheels have a diameter of 7 cm. Using π = 22/7, how many full turns must they make to roll 110 cm?
10. 10.🔦 A light sensor reads 40 over black and 60 over white. A good threshold is halfway between them. What is it?
11. 11.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
12. 12.🛞 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) goes straight forward
13. 13.🛞 A robot’s wheels have a diameter of 10 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
14. 14.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) nowhere (b) slower (c) faster (d) backwards
15. 15.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) wheel size (c) driver teeth (d) number of gears
16. 16.🧭 A robot spins 60° every second. How many seconds does it take to turn 300°?
17. 17.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
18. 18.True or false: “usually turns 0° to 180°” is true of a DC motor. (a) True (b) False
19. 19.🦾 A servo moves from 140° to 70°. How many degrees does it turn?
20. 20.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs forward. What does the robot do? (a) goes straight back (b) spins left on the spot (c) turns left (d) turns right
21. 21.🛞 A small free-turning wheel that only helps a robot balance is called … (a) a gear (b) a servo (c) a caster wheel (d) a track
22. 22.🔍 Which sensor helps a robot stop before a wall? (a) a touch sensor (b) a distance sensor (c) a temperature sensor (d) a light sensor
23. 23.🧭 A robot faces west. It does: turn around, turn right. Which way does it face now? (a) west (b) north (c) east (d) south
24. 24.🧭 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
25. 25.⚙️ A 24-tooth driver gear turns an 8-tooth driven gear. The driver turns 9 times. How many times does the driven gear turn?
26. 26.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
27. 27.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 7 cm (use π = 22/7). The motor turns 3 times. How far does the robot roll (in cm)?
28. 28.📡 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 10 seconds (in cm)?
29. 29.True or false: “a smooth classroom floor” suits tracks. (a) True (b) False
30. 30.📡 A distance sensor sends a sound pulse and hears the echo 14 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
31. 31.⚙️ What are the bumps round the edge of a gear called? (a) teeth (b) spokes (c) tyres (d) pins
32. 32.Which job needs a temperature sensor? (a) warn if motors get hot (b) stop before a wall (c) start on a hand clap (d) feel a bump into a wall
33. 33.🛞 The diameter of a wheel is how many times its radius? (a) 1 (b) 4 (c) 2 (d) 3
34. 34.⚙️ A 12-tooth driver gear turns a 60-tooth driven gear. The driver turns 35 times. How many times does the driven gear turn?
35. 35.True or false: “spins round and round” is true of a DC motor. (a) True (b) False
36. 36.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 35 cm (use π = 22/7). The motor turns 10 times. How far does the robot roll (in cm)?
37. 37.🛞 A robot has one motor on its left wheel and one on its right wheel. The left motor runs backward and the right motor runs backward. What does the robot do? (a) turns right (b) goes straight back (c) stays still (d) turns left
38. 38.🦾 A servo program runs:
    angle = 180
    angle = angle − 20
    angle = angle + 20
    angle = angle − 40
    To what angle (in degrees) does the servo turn in the end?
39. 39.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 60 turns a minute. What does the robot do? (a) goes straight forward (b) curves to the right (c) curves to the left
40. 40.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 1 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No

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