Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 520 · 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.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) pins (c) spokes (d) teeth
2. 2.📡 A robot is 160 cm from a wall and drives straight at it at 5 cm per second. How far from the wall is it after 7 seconds (in cm)?
3. 3.🛞 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) turns right (b) spins right on the spot (c) stays still (d) goes straight forward
4. 4.True or false: “stepping over wide gaps” suits propellers. (a) False (b) True
5. 5.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 10 turns a minute and the right wheel at 100 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
6. 6.Which job needs a light sensor? (a) start on a hand clap (b) warn if motors get hot (c) read a QR code (d) find the brightest spot
7. 7.🔍 What does a gyro sensor measure? (a) temperature (b) sound (c) colour (d) turning (rotation)
8. 8.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) slower but stronger (c) faster and weaker (d) at the same speed
9. 9.🧭 How many degrees is a right-angle turn? (a) 360° (b) 90° (c) 45° (d) 180°
10. 10.🔍 For a robot’s controller, is a sensor an input or an output? (a) a wheel (b) an output (c) an input (d) a gear
11. 11.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how far does the robot roll when the wheels turn 7 times (in cm)?
12. 12.🛞 A robot wheel has a radius of 21 cm. Using π = 22/7, what is its circumference (in cm)?
13. 13.📡 Which object is hardest for an echo sensor to notice? (a) a wooden box (b) a metal door (c) a soft foam cushion (d) a flat wall
14. 14.🧭 How many degrees is a full turn? (a) 360° (b) 180° (c) 100° (d) 90°
15. 15.Which job needs a sound sensor? (a) hear a whistle (b) spot a red ball (c) measure a turn angle (d) stay balanced upright
16. 16.⚙️ A 32-tooth driver gear turns an 8-tooth driven gear. The driver turns 4 times. How many times does the driven gear turn?
17. 17.⚙️ A 48-tooth driver gear turns a 12-tooth driven gear. The driver turns 5 times. How many times does the driven gear turn?
18. 18.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 90 and the right sensor reads 15. Which sensor is over the black line? (a) both sensors (b) neither sensor (c) the right sensor (d) the left sensor
19. 19.🧭 What does a gyro help a robot do? (a) see colours (b) smell smoke (c) hear claps (d) turn by exact angles
20. 20.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how many full turns must they make to roll 616 cm?
21. 21.⚙️ A 15-tooth driver gear turns a 75-tooth driven gear. The driven gear turns 7 times. How many times did the driver turn?
22. 22.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) big drives small (b) small drives big
23. 23.🔍 Which sensor helps a robot spot a red ball? (a) a sound sensor (b) a camera (c) a temperature sensor (d) a distance sensor
24. 24.🧭 A robot should turn right 180°, but its gyro shows it turned 175°. How many degrees must it turn more to the right?
25. 25.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
26. 26.🧭 A robot faces south. It does: turn right, turn right. Which way does it face now? (a) south (b) east (c) west (d) north
27. 27.🛞 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?
28. 28.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 180°. Where does the arm point? (a) points up and left (b) points left (c) points straight up (d) points right
29. 29.📡 A distance sensor sends a sound pulse and hears the echo 11 ms later. Sound travels about 34 cm every millisecond. How far away is the object (in cm)?
30. 30.⚙️ Which motor is best for spinning a robot’s wheels round and round? (a) a light sensor (b) a DC motor (c) a buzzer (d) a servo motor
31. 31.🧭 A robot keeps turning right by 60° at a time. How many turns make one full circle?
32. 32.True or false: to know a button is pressed, use a touch sensor. (a) True (b) False
33. 33.🧭 A robot spins 30° every second. How many seconds does it take to turn 30°?
34. 34.⚙️ A 15-tooth driver gear turns a 75-tooth driven gear. The driver turns 45 times. How many times does the driven gear turn?
35. 35.📡 A robot stops if an object is closer than 60 cm. Its distance sensor hears the echo after 6 ms (sound: about 34 cm per ms). Does the robot stop? (a) Yes (b) No
36. 36.⚙️ How do you make a DC motor spin the other way? (a) add more wheels (b) shake it (c) swap its two wires (d) paint it red
37. 37.🛞 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) stays still (c) turns right (d) spins left on the spot
38. 38.🛞 Why do most indoor robots use wheels? (a) they look funny (b) they climb stairs (c) they float (d) fast and easy on floors
39. 39.🔦 A light sensor reads 10 over black and 70 over white. A good threshold is halfway between them. What is it?
40. 40.⚙️ A motor changes electrical energy into … (a) light (b) sound only (c) water (d) movement

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