Robotics Worksheet: Part 2 Test

Robotics lesson 20: Part 2 test: how robots move and sense · Set 80 · 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.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
2. 2.🦾 A servo arm points right at 0°, straight up at 90° and left at 180°. It is set to 0°. Where does the arm point? (a) points up and left (b) points right (c) points left (d) points up and right
3. 3.⚙️ An 8-tooth driver gear turns a 40-tooth driven gear. The driven gear turns 8 times. How many times did the driver turn?
4. 4.⚙️ A motor makes 120 turns a minute with a 15-tooth gear on it. That gear drives a 60-tooth gear. How many turns a minute does the 60-tooth gear make?
5. 5.Which of these suits wheels? (a) flying over a field (b) moving under water (c) a muddy building site (d) a long factory floor
6. 6.⚙️ Which gear set-up gives this: “the output is weaker”? (a) small drives big (b) big drives small
7. 7.True or false: “moves an arm joint” is true of a DC motor. (a) False (b) True
8. 8.🛞 Circumference = π × … (a) weight (b) radius only (c) diameter (d) speed
9. 9.🔢 Gear ratio = driven teeth ÷ … (a) motor volts (b) number of gears (c) driver teeth (d) wheel size
10. 10.🛞 Which way of moving suits this best: “a field of tall boulders”? (a) wheels (b) legs (c) tracks (d) propellers
11. 11.🛞 A robot’s wheels have a diameter of 8 cm. Using π = 3.14, how far does the robot roll when the wheels turn 1 time (in cm)? =
12. 12.⚙️ DC motor or servo motor: which one spins round and round? (a) a servo motor (b) a DC motor
13. 13.Which job needs a distance sensor? (a) spot a red ball (b) hear a whistle (c) feel a bump into a wall (d) measure how far a box is
14. 14.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
15. 15.🛞 Both wheels of a two-wheeled robot turn forward. The left wheel turns at 20 turns a minute and the right wheel at 70 turns a minute. What does the robot do? (a) curves to the left (b) curves to the right (c) goes straight forward
16. 16.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
17. 17.⚙️ A small gear drives a big gear. The big gear turns … (a) faster and weaker (b) slower but stronger (c) not at all (d) at the same speed
18. 18.🛞 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) turns right (c) goes straight back (d) spins left on the spot
19. 19.📡 A robot is 260 cm from a wall and drives straight at it at 15 cm per second. How far from the wall is it after 9 seconds (in cm)?
20. 20.🧭 A robot spins 45° every second. How many seconds does it take to turn 90°?
21. 21.🛞 A robot’s wheels have a diameter of 21 cm. Using π = 22/7, how many full turns must they make to roll 528 cm?
22. 22.🔍 A light sensor gets the most reflected light from … (a) a white surface (b) a black line (c) a dark tunnel (d) a black surface
23. 23.📡 In these lessons, sound travels about how far in 1 millisecond? (a) 3 cm (b) 34 cm (c) 340 cm (d) 1 km
24. 24.🛞 A motor’s 10-tooth gear drives a 20-tooth gear on the wheel axle. The wheels have a diameter of 7 cm (use π = 22/7). The motor turns 4 times. How far does the robot roll (in cm)?
25. 25.🛞 A robot wheel has a diameter of 42 cm. Using π = 22/7, what is its circumference (in cm)?
26. 26.Which job needs a light sensor? (a) start on a hand clap (b) measure how far a box is (c) stop before a wall (d) follow a black line
27. 27.🔍 Which sensor helps a robot read a QR code? (a) a temperature sensor (b) a gyro sensor (c) a distance sensor (d) a camera
28. 28.🔦 A light sensor reads 30 over black and 70 over white. A good threshold is halfway between them. What is it?
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 90°. It turns right 45°, then left 45°. What does the gyro read now (0° to 359°)?
30. 30.⚙️ Which gear set-up gives this: “the output turns slower”? (a) small drives big (b) big drives small
31. 31.🛞 A robot’s wheels have a diameter of 5 cm. Using π = 3.14, how far does the robot roll when the wheels turn 5 times (in cm)? =
32. 32.⚙️ A 75-tooth driver gear turns a 15-tooth driven gear. The driver turns 7 times. How many times does the driven gear turn?
33. 33.True or false: “usually turns 0° to 180°” is true of a servo motor. (a) True (b) False
34. 34.🛞 A motor’s 10-tooth gear drives a 30-tooth gear on the wheel axle. The wheels have a diameter of 14 cm (use π = 22/7). The motor turns 6 times. How far does the robot roll (in cm)?
35. 35.🛞 With the same motor speed, a bigger wheel makes the robot go … (a) backwards (b) faster (c) slower (d) nowhere
36. 36.📡 Which object is hardest for an echo sensor to notice? (a) a flat wall (b) a wooden box (c) a soft foam cushion (d) a metal door
37. 37.True or false: “a smooth classroom floor” suits wheels. (a) True (b) False
38. 38.🧭 A robot keeps turning right by 40° at a time. How many turns make one full circle?
39. 39.🛞 A robot’s wheels have a diameter of 28 cm. Using π = 22/7, how far does the robot roll when the wheels turn 5 times (in cm)?
40. 40.🔦 A robot has a left and a right light sensor. Below 50 means black. The left sensor reads 70 and the right sensor reads 25. Which sensor is over the black line? (a) neither sensor (b) the left sensor (c) the right sensor (d) both sensors

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