Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 5 · 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.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
2. 2.True or false: a pillar under a roof is in tension (pulled). (a) True (b) False
3. 3.Which of these is made by engineers? (a) a coral reef (b) a volcano (c) a river (d) a dam
4. 4.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 320 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
5. 5.🔺 Which strong shape does an old stone bridge use? (a) beam (b) arch (c) triangle (d) dome
6. 6.🏋️ Pushing a crate 4 m took 920 J of work. What force was used, in newtons?
7. 7.📐 On a plan, 1 cm stands for 2 m. A wall is 4 cm long on the plan. How long is the real wall, in metres?
8. 8.♻️ Reduce, reuse or recycle: switch off unused lights? (a) reduce (b) reuse (c) recycle
9. 9.🤝 A team plans for 20 minutes, builds for 40 minutes and then tests for 10 minutes, one after another. How many minutes is that in all?
10. 10.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
11. 11.🔍 Which is the odd one out? (a) record every result (b) use a new load each time (c) change lots at once (d) skip writing results
12. 12.True or false: a mechanical engineer designs bicycle gears. (a) False (b) True
13. 13.🪝 A bucket weighing 410 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
14. 14.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the colour of rope (d) the size of the load
15. 15.📋 Constraint: the tower must be no taller than 40 cm. The team’s tower is 40 cm tall. Is it within the constraint? (a) No (b) Yes
16. 16.🔍 Which is the odd one out? (a) a squeezed spring (b) a pillar under a roof (c) a tent guy rope (d) a table leg
17. 17.🔍 Which is the odd one out? (a) change lots at once (b) use a new load each time (c) change only one thing (d) test it only once
18. 18.🧪 A paper bridge was tested three times. It held 370 g, 210 g and 230 g. What is the mean (average) load it held, in grams?
19. 19.🔄 After testing, a design does not work well. What comes next? (a) Ask (b) Imagine (c) give up (d) Improve
20. 20.🧱 Which property matters most for a cooking pot handle? (a) heat insulator (b) transparent (c) electrical conductor (d) waterproof
21. 21.🪝 A winch has a wheel of radius 9 cm and an axle of radius 3 cm. What effort on the wheel lifts a 510 N bucket on the axle, in newtons? (ideal)
22. 22.🔺 A flat frame has 4 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
23. 23.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
24. 24.🏚️ Why is a wide base safer? (a) it is lighter (b) it is taller (c) it is colourful (d) it is harder to tip over
25. 25.Which of these uses triangles? (a) a round palace roof (b) an igloo (c) a shelf on two brackets (d) a truss bridge side
26. 26.📋 Criterion: the model bridge must hold at least 600 g. In the test it held 750 g. Does it meet the criterion? (a) No (b) Yes
27. 27.⚖️ A seesaw balances. Meena (190 N) sits ? m from the pivot on one side; Asha (570 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
28. 28.🔺 Which shape keeps its shape best when its corners are pinned? (a) square (b) triangle (c) rectangle (d) hexagon
29. 29.📋 For a model bridge challenge, is “float for 1 minute” a constraint or a criterion? (a) a criterion (b) a constraint
30. 30.♻️ Reduce, reuse or recycle: carry a cloth bag? (a) reduce (b) reuse (c) recycle
31. 31.📐 On a plan, 1 cm stands for 2 m. A wall is 16 cm long on the plan. How long is the real wall, in metres?
32. 32.🔢 To build and test a straw bridge, which is the FIRST step? (a) sketch three ideas (b) choose and draw one (c) strengthen the weak part (d) read the challenge rules
33. 33.Which need does a solar panel meet? (a) cross a wide river (b) go through a mountain (c) make water safe to drink (d) make power from sunlight
34. 34.🌉 Which bridge type can cross the widest gap in one span? (a) suspension bridge (b) log bridge (c) beam bridge (d) arch bridge
35. 35.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 1 (c) class 2
36. 36.🤝 A team plans for 60 minutes, builds for 10 minutes and then tests for 25 minutes, one after another. How many minutes is that in all?
37. 37.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
38. 38.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 80 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
39. 39.🛠️ Is a lift made by engineers or found in nature? (a) found in nature (b) made by engineers
40. 40.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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