Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 731 · 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.Which of these suits propellers? (a) a flat road (b) a muddy building site (c) a long factory floor (d) flying over a field
2. 2.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) anticlockwise (b) clockwise
3. 3.⚙️ A 50-tooth driver gear turns a 10-tooth driven gear. The driver turns 8 times. How many times does the driven gear turn?
4. 4.📡 A robot is 110 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)?
5. 5.⚙️ DC motor or servo motor: which one usually turns 0° to 180°? (a) a DC motor (b) a servo motor
6. 6.🔍 Which sensor helps a robot start on a hand clap? (a) a gyro sensor (b) a sound sensor (c) a temperature sensor (d) a camera
7. 7.🧭 A robot faces west. It does: turn left, turn left. Which way does it face now? (a) south (b) west (c) east (d) north
8. 8.📡 What does an ultrasonic distance sensor send out? (a) water drops (b) sound too high to hear (c) radio music (d) bright light
9. 9.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 45°. Where does the arm point? (a) points right (b) points up and right (c) points straight up (d) points up and left
10. 10.🧭 A robot keeps turning right by 30° at a time. How many turns make one full circle?
11. 11.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) nowhere (b) faster (c) slower (d) backwards
12. 12.🛞 A robot’s wheels have a diameter of 14 cm. Using π = 22/7, how far does the robot roll when the wheels turn 7 times (in cm)?
13. 13.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 15 and the right sensor reads 15. Which sensor is over the black line? (a) the right sensor (b) neither sensor (c) the left sensor (d) both sensors
14. 14.⚙️ A 10-tooth gear drives a 30-tooth gear. What is the gear ratio (driven teeth ÷ driver teeth)?
15. 15.🛞 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) goes straight back (b) stays still (c) turns left (d) turns right
16. 16.🛞 Which value of π is easiest for wheels of 7 cm, 14 cm or 21 cm? (a) 2/7 (b) 7/22 (c) 22 (d) 22/7
17. 17.🔍 A light sensor gets the most reflected light from … (a) a black surface (b) a black line (c) a white surface (d) a dark tunnel
18. 18.🛞 A robot’s wheels have a diameter of 20 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
19. 19.⚙️ An 8-tooth driver gear turns a 32-tooth driven gear. The driven gear turns 5 times. How many times did the driver turn?
20. 20.⚙️ A 24-tooth driver gear turns a 12-tooth driven gear. The driver turns 3 times. How many times does the driven gear turn?
21. 21.🔍 Which sensor helps a robot feel a bump into a wall? (a) a gyro sensor (b) a light sensor (c) a sound sensor (d) a touch sensor
22. 22.⚙️ A 12-tooth driver gear must make the driven gear turn 2 times slower. How many teeth must the driven gear have?
23. 23.🛞 Which way of moving suits this best: “a flat road”? (a) wheels (b) legs (c) tracks (d) propellers
24. 24.True or false: “drives the wheels” is true of a DC motor. (a) False (b) True
25. 25.⚙️ An 8-tooth driver gear turns a 32-tooth driven gear. The driven gear turns 4 times. How many times did the driver turn?
26. 26.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 10 times. How many times does the driven gear turn?
27. 27.🛞 Which way of moving suits this best: “soft snow”? (a) legs (b) tracks (c) wheels (d) propellers
28. 28.⚙️ A common servo can turn from 0° up to about … (a) 1800° (b) 10° (c) 180° (d) 18°
29. 29.🧭 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 right 60°, then left 30°, then right 135°. What does the gyro read now (0° to 359°)?
30. 30.🦾 A servo moves from 140° to 30°. How many degrees does it turn?
31. 31.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
32. 32.📡 A robot is 260 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 15 seconds (in cm)?
33. 33.Which of these suits propellers? (a) a flat road (b) moving under water (c) a muddy building site (d) crossing stepping-stones
34. 34.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they float (c) they look funny (d) fast and easy on floors
35. 35.⬛ A reading below the threshold means the sensor is over … (a) the sky (b) water (c) black (d) white
36. 36.🛞 How far does a wheel roll in one full turn? (a) its diameter (b) its radius (c) its weight (d) its circumference
37. 37.⚙️ DC motor or servo motor: which one drives the wheels? (a) a servo motor (b) a DC motor
38. 38.⚙️ Two gears are meshed together. How do they turn? (a) in opposite directions (b) they do not turn (c) one up, one down (d) the same direction
39. 39.🛞 Which way of moving suits this best: “stepping over wide gaps”? (a) propellers (b) wheels (c) tracks (d) legs
40. 40.🛞 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) goes straight forward (b) turns right (c) spins left on the spot (d) goes straight back

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