Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 300 · 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: “drives the wheels” is true of a servo motor. (a) False (b) True
2. 2.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 1 km (b) 3 cm (c) 34 cm (d) 340 cm
3. 3.🧭 A robot spins 45° every second. How many seconds does it take to turn 315°?
4. 4.🔢 Gear ratio = driven teeth ÷ … (a) number of gears (b) motor volts (c) driver teeth (d) wheel size
5. 5.🦾 A servo program runs:
   angle = 100
   angle = angle + 10
   angle = angle − 50
   angle = angle + 50
   angle = angle − 30
   To what angle (in degrees) does the servo turn in the end?
6. 6.⚙️ A small gear drives a big gear. The big gear turns … (a) not at all (b) slower but stronger (c) at the same speed (d) faster and weaker
7. 7.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 13. What is under the sensor? (a) the black line (b) the white floor
8. 8.🛞 Why do most indoor robots use wheels? (a) they climb stairs (b) they float (c) fast and easy on floors (d) they look funny
9. 9.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 90 turns a minute and the right wheel at 40 turns a minute. What does the robot do? (a) curves to the right (b) goes straight forward (c) curves to the left
10. 10.🧭 How many degrees is a full turn? (a) 180° (b) 360° (c) 100° (d) 90°
11. 11.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 43. What is under the sensor? (a) the black line (b) the white floor
12. 12.📡 A robot is 200 cm from a wall and drives straight at it at 10 cm per second. How far from the wall is it after 16 seconds (in cm)?
13. 13.🛞 A robot wheel has a radius of 7 cm. Using π = 22/7, what is its circumference (in cm)?
14. 14.🧭 A robot faces north. It does: turn right, turn left, turn right. Which way does it face now? (a) west (b) east (c) north (d) south
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) turns left (b) goes straight forward (c) spins right on the spot (d) stays still
16. 16.🧭 A robot should turn right 90°, but its gyro shows it turned 105°. How many degrees must it turn back to the left?
17. 17.⚙️ A 16-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) at the same speed (c) slower
18. 18.Which job needs a gyro sensor? (a) start on a hand clap (b) warn if motors get hot (c) feel a bump into a wall (d) measure a turn angle
19. 19.🔦 A light sensor reads below 30 over a black line and above 30 over the white floor. It reads 18. What is under the sensor? (a) the white floor (b) the black line
20. 20.🔦 A light sensor reads below 60 over a black line and above 60 over the white floor. It reads 40. What is under the sensor? (a) the black line (b) the white floor
21. 21.🔢 To climb a steep ramp, a robot needs a gear ratio that is … (a) never important (b) zero (c) big (slow and strong) (d) small (fast, weak)
22. 22.🛞 What is the main difficulty with legs for a robot? (a) they are too cheap (b) they never tire (c) harder to balance (d) too fast on floors
23. 23.🦾 A servo moves from 0° to 80°. How many degrees does it turn?
24. 24.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 70 and the right sensor reads 10. Which sensor is over the black line? (a) the left sensor (b) both sensors (c) the right sensor (d) neither sensor
25. 25.⚙️ A big gear drives a small gear. The small gear turns … (a) slower but stronger (b) faster but weaker (c) at the same speed (d) not at all
26. 26.🛞 A robot’s wheels have a diameter of 42 cm. Using π = 22/7, how far does the robot roll when the wheels turn 5 times (in cm)?
27. 27.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) small drives big (b) big drives small
28. 28.🛞 Which way of moving suits this best: “loose sand dunes”? (a) legs (b) wheels (c) propellers (d) tracks
29. 29.🛞 A robot’s wheels have a diameter of 35 cm. Using π = 22/7, how many full turns must they make to roll 1100 cm?
30. 30.🛞 How far does a wheel roll in one full turn? (a) its weight (b) its diameter (c) its radius (d) its circumference
31. 31.True or false: “a smooth classroom floor” suits wheels. (a) True (b) False
32. 32.🧭 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 30°, then left 135°. What does the gyro read now (0° to 359°)?
33. 33.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
34. 34.🦾 A servo turns 60° every 100 ms. How many milliseconds does it take to turn 30°?
35. 35.🛞 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
36. 36.🧭 A robot faces south. It does: turn right, turn right, turn around, turn right. Which way does it face now? (a) north (b) west (c) east (d) south
37. 37.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
38. 38.⚙️ DC motor or servo motor: which one has a signal wire? (a) a DC motor (b) a servo motor
39. 39.Which job needs a touch sensor? (a) spot a red ball (b) find the brightest spot (c) start on a hand clap (d) feel a bump into a wall
40. 40.⚙️ DC motor or servo motor: which one spins round and round? (a) a DC motor (b) a servo motor

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