Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 331 · 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.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
2. 2.🤝 How do engineers share a design with others? (a) only talking fast (b) no drawings at all (c) secret notes (d) clear labelled sketches
3. 3.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
4. 4.🧪 Why repeat a test three times? (a) it looks busy (b) to use more paper (c) to get reliable results (d) the first is wrong
5. 5.True or false: to pick the build order is the Ask step. (a) False (b) True
6. 6.Which of these is a lever? (a) a flagpole rope wheel (b) a knife edge (c) a wheelchair ramp (d) a seesaw
7. 7.True or false: to build the model is the Create step. (a) False (b) True
8. 8.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the direction of pull (d) the colour of rope
9. 9.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 10 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
11. 11.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Ravi (540 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.True or false: to let adults use hot glue is not safe. (a) True (b) False
13. 13.⚖️ A lever bar balances. The load is 180 N at ? cm from the fulcrum. The effort is 360 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.⚖️ A seesaw balances. Asha (? N) sits 4 m from the pivot on one side; Ravi (400 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.🪢 A concrete slab weighing 3400 N rests evenly on 2 identical pillars. What compression force does each pillar carry, in newtons?
16. 16.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
17. 17.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) near the fulcrum (d) on the fulcrum
18. 18.♻️ Is petrol a renewable or a non-renewable energy source? (a) non-renewable (b) renewable
19. 19.🌉 Which bridge type: “a log across a stream”? (a) arch bridge (b) suspension bridge (c) beam bridge
20. 20.📐 Why do engineers use scale drawings? (a) to save ink only (b) to make them pretty (c) big things fit on paper (d) to hide sizes
21. 21.True or false: to find the limits is the Ask step. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) clay pottery (b) glass (c) brass (d) dry wood
23. 23.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Arjun (100 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.♻️ A school bench is made from 450 recycled plastic bottles. How many benches can be made from 3150 bottles?
25. 25.Which of these is found in nature? (a) a dam (b) a river (c) a water filter (d) a bicycle
26. 26.True or false: to dream up possible fixes is the Improve step. (a) False (b) True
27. 27.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
28. 28.🏚️ Where should heavy water tanks go in a quake zone? (a) on a thin pole (b) low down (c) on the very top (d) hanging outside
29. 29.True or false: to carry scissors closed is safe. (a) False (b) True
30. 30.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
31. 31.True or false: to follow the plan to build is the Plan step. (a) True (b) False
32. 32.🔢 To build and test a straw bridge, which comes first: “read the challenge rules” or “load it with coins”? (a) load it with coins (b) read the challenge rules
33. 33.🌉 Which bridge type: “pushes out on its ends”? (a) arch bridge (b) beam bridge (c) suspension bridge
34. 34.🧪 What is a prototype? (a) a sales poster (b) the final product (c) a broken part (d) an early test model
35. 35.🔍 Which is the odd one out? (a) repeat each test (b) record every result (c) guess, do not measure (d) use the same load
36. 36.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 300 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.True or false: a magnifier lens needs a transparent material. (a) True (b) False
38. 38.Which of these is caused by friction? (a) lifting a school bag (b) brakes stop a bicycle (c) a river flows downhill (d) a magnet picks up pins
39. 39.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 12 (d) 6
40. 40.📋 For a model bridge challenge, is “stand in a fan breeze” a constraint or a criterion? (a) a criterion (b) a constraint

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