Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 364 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: design process, force, machine, lever, structure, material, bridge or scale. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, work = force × distance, real = drawing × scale. Write the calculation before you answer.

1. 1.Which of these is reduce (use less)? (a) reuse gift paper (b) carry a cloth bag (c) pulp old paper (d) refill a water bottle
2. 2.⚖️ A lever bar balances. The load is 180 N at 10 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.Which of these happens in the Improve step? (a) fix the weak part (b) draw a labelled diagram (c) check it against goals (d) measure its performance
4. 4.🧱 Is steel an electrical conductor or an insulator? (a) a conductor (b) an insulator
5. 5.True or false: a pair of kitchen tongs is a class 2 lever (load in the middle). (a) True (b) False
6. 6.🪝 A winch has a wheel of radius 6 cm and an axle of radius 2 cm. What effort on the wheel lifts a 90 N bucket on the axle, in newtons? (ideal)
7. 7.🧪 Why repeat a test three times? (a) the first is wrong (b) to use more paper (c) to get reliable results (d) it looks busy
8. 8.True or false: a satellite is found in nature. (a) False (b) True
9. 9.⚖️ A seesaw balances. Zoya (200 N) sits ? m from the pivot on one side; Arjun (800 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
10. 10.🪝 A bucket weighing 80 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
11. 11.🔢 To build and test a straw bridge, which is the LAST step? (a) choose and draw one (b) strengthen the weak part (c) load it with coins (d) read the challenge rules
12. 12.📋 For a model bridge challenge, is “finish in 40 minutes” a constraint or a criterion? (a) a criterion (b) a constraint
13. 13.🔺 A beam bends under a load. Its top side is … (a) squeezed (compression) (b) floating (c) stretched (tension) (d) not affected
14. 14.⚖️ A seesaw balances. Kabir (170 N) sits ? m from the pivot on one side; Meena (340 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
15. 15.🧱 Is plastic an electrical conductor or an insulator? (a) an insulator (b) a conductor
16. 16.🦺 Who should use hot glue guns and power tools in a kids’ project? (a) an adult (b) a stranger (c) any child alone (d) the youngest child
17. 17.🔺 A frame shaped like a square is made of straws joined by loose pins, with 0 corner-to-corner braces. Is it rigid or wobbly? (a) wobbly (b) rigid
18. 18.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) glass (d) ice
19. 19.💪 In a tug of war, one team pulls right with 50 N and the other pulls left with 30 N. What is the size of the net force, in newtons?
20. 20.True or false: “a flat deck on piers” is a beam bridge. (a) True (b) False
21. 21.True or false: a well-bucket rope wheel is a pulley. (a) True (b) False
22. 22.🪝 A bucket weighing 380 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
24. 24.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) warm (d) wet
25. 25.🤝 Why do engineers work in teams? (a) to work alone (b) many skills and ideas (c) to finish nothing (d) to argue more
26. 26.True or false: to check a shelf is level, use sandpaper. (a) True (b) False
27. 27.⚖️ A lever bar balances. The load is 160 N at 40 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.🧪 Is it good or poor testing to guess, do not measure? (a) poor testing (b) good testing
29. 29.True or false: to measure a long length, use a tape measure. (a) False (b) True
30. 30.Which of these is a lever? (a) a seesaw (b) a truck loading ramp (c) a crane hook block (d) a wood screw
31. 31.True or false: a mechanical engineer keeps data safe online. (a) False (b) True
32. 32.🧪 What is a prototype? (a) an early test model (b) a broken part (c) a sales poster (d) the final product
33. 33.💪 Two children push a box to the right, one with 25 N and the other with 15 N. What is the net (total) force on the box, in newtons?
34. 34.🔧 Which tool would you use to drive in a nail? (a) sandpaper (b) a saw (c) a hammer (d) a spirit level
35. 35.🔺 One side of a straw bridge is a row of 15 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
36. 36.📐 A beam is 210 cm long. How long is it in metres? =
37. 37.🔺 How do engineers stop a square frame from wobbling? (a) paint it (b) take off a side (c) add a diagonal brace (d) make it bigger
38. 38.🔺 Which shape keeps its shape best when its corners are pinned? (a) triangle (b) hexagon (c) rectangle (d) square
39. 39.🤝 Is it good or poor teamwork to listen to every idea? (a) good teamwork (b) poor teamwork
40. 40.🤝 In a design team, who runs the tests? (a) materials manager (b) tester (c) recorder (d) team leader

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