Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 248 · 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.🔺 A flat frame has 8 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
2. 2.🧱 Which property matters most for a plug pin? (a) waterproof (b) transparent (c) electrical conductor (d) heat insulator
3. 3.🔍 Which is the odd one out? (a) a mountain (b) a bridge (c) a mobile phone (d) a ceiling fan
4. 4.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
5. 5.📐 On a plan, 1 cm stands for 10 m. A real bridge is 110 m long. How long is it on the plan, in centimetres?
6. 6.🧑‍🔧 Which kind of engineer makes medicines in bulk? (a) computer (b) electrical (c) biomedical (d) chemical
7. 7.True or false: a roof truss uses triangles. (a) False (b) True
8. 8.♻️ Is sunlight a renewable or a non-renewable energy source? (a) renewable (b) non-renewable
9. 9.True or false: to think of wild ideas is the Ask step. (a) True (b) False
10. 10.🧑‍🔧 Which kind of engineer designs school networks? (a) civil (b) computer (c) chemical (d) mechanical
11. 11.🪢 A sign weighing 800 N hangs from 4 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
12. 12.🔢 To follow the engineering design process, which comes first: “Test” or “Improve”? (a) Test (b) Improve
13. 13.📋 A design meets every criterion but costs more than the budget. Is it acceptable? (a) yes, always (b) yes, it works (c) only if it is red (d) no, it breaks a limit
14. 14.🤝 A team plans for 35 minutes, builds for 45 minutes and then tests for 5 minutes, one after another. How many minutes is that in all?
15. 15.🧑‍🔧 Which branch of engineering works on aeroplanes and rockets? (a) computer (b) aerospace (c) chemical (d) civil
16. 16.🪢 Compression is a force that … (a) makes light (b) cools things (c) pulls or stretches (d) pushes or squeezes
17. 17.🌉 Which bridge type: “good for short gaps”? (a) arch bridge (b) beam bridge (c) suspension bridge
18. 18.True or false: a bridge is found in nature. (a) True (b) False
19. 19.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
20. 20.⚖️ A lever bar balances. The load is 420 N at 10 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
22. 22.🔍 Which is the odd one out? (a) steel (b) brass (c) plastic (d) iron
23. 23.True or false: a satellite is found in nature. (a) True (b) False
24. 24.Which of these is a beam bridge? (a) a log across a stream (b) stones squeezed together (c) a rope bridge in hills (d) tall towers hold cables
25. 25.♻️ A family used to throw away 7 plastic bags a week. They now carry cloth bags. How many plastic bags do they save in 4 weeks?
26. 26.What does the materials manager do? (a) keeps the design notes (b) writes down results (c) checks the goals are met (d) tracks what is used up
27. 27.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
28. 28.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) False (b) True
29. 29.🪝 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)
30. 30.True or false: a waterfall is made by engineers. (a) True (b) False
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 10 N, ice 3 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
32. 32.🤝 In a design team, who keeps the team on track? (a) materials manager (b) recorder (c) tester (d) team leader
33. 33.🔺 Which strong shape does a shelf on two brackets use? (a) arch (b) dome (c) beam (d) triangle
34. 34.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) False (b) True
35. 35.📋 For a model bridge challenge, is “finish in 40 minutes” a constraint or a criterion? (a) a criterion (b) a constraint
36. 36.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.🏚️ Three solid model towers are made of the same material. Tower A is 30 cm tall on a 10 cm wide base, tower B is 180 cm tall on a 30 cm base and tower C is 150 cm tall on a 30 cm base. Which is the easiest to tip over? (a) tower A (b) tower C (c) tower B
38. 38.🔍 Which is the odd one out? (a) a stone in an arch (b) a temple column (c) a swing chain (d) a tall bridge tower
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
40. 40.🤝 Why do engineers work in teams? (a) to finish nothing (b) to argue more (c) to work alone (d) many skills and ideas

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