Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 259 · 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.True or false: a biomedical engineer runs a fertiliser plant. (a) False (b) True
2. 2.Which of these is a beam bridge? (a) a flat deck on piers (b) a rope bridge in hills (c) stones squeezed together (d) the longest spans of all
3. 3.📐 On a plan, 1 cm stands for 20 m. A wall is 15 cm long on the plan. How long is the real wall, in metres?
4. 4.Which of these happens in the Improve step? (a) redesign after testing (b) measure its performance (c) build the model (d) dream up possible fixes
5. 5.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
6. 6.🤝 Why do engineers work in teams? (a) to finish nothing (b) to argue more (c) to work alone (d) many skills and ideas
7. 7.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) colour of bar (d) time taken
8. 8.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 420 N bucket on the axle, in newtons? (ideal)
9. 9.📋 Criterion: the model bridge must hold at least 600 g. In the test it held 550 g. Does it meet the criterion? (a) No (b) Yes
10. 10.True or false: a swing chain is in tension (pulled). (a) True (b) False
11. 11.🌉 A beam bridge is 250 m long. Piers split it into equal spans of 50 m. How many spans are there?
12. 12.🧱 Which material is best for the core of an electric wire? (a) rubber (b) wood (c) copper (d) glass
13. 13.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.⚖️ A seesaw balances. Kabir (? N) sits 3 m from the pivot on one side; Ravi (420 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) anywhere (d) closer to the pivot
16. 16.True or false: to skip writing results is good testing. (a) False (b) True
17. 17.True or false: to follow the plan to build is the Create step. (a) False (b) True
18. 18.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
19. 19.🔧 Which tool would you use to make a hole in wood? (a) a screwdriver (b) a saw (c) a hand drill (d) a protractor
20. 20.True or false: to use a new load each time is poor testing. (a) False (b) True
21. 21.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
22. 22.Which of these happens in the Ask step? (a) dream up possible fixes (b) fix the weak part (c) ask who will use it (d) check it against goals
23. 23.♻️ Reduce, reuse or recycle: switch off unused lights? (a) recycle (b) reduce (c) reuse
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 2 N, a wooden plank 3 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
25. 25.Which of these is caused by friction? (a) rain falls to the ground (b) a river flows downhill (c) a thrown ball comes down (d) rubbing hands warms them
26. 26.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 980 N bucket on the axle, in newtons? (ideal)
27. 27.📐 Why do engineers use scale drawings? (a) to make them pretty (b) to hide sizes (c) to save ink only (d) big things fit on paper
28. 28.True or false: to carry scissors closed is not safe. (a) True (b) False
29. 29.🤝 In a design team, who keeps the team on track? (a) tester (b) team leader (c) builder (d) materials manager
30. 30.🔺 One side of a straw bridge is a row of 3 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
31. 31.Which of these needs a flexible material? (a) a hair band (b) a raincoat (c) a magnifier lens (d) a water tank
32. 32.🪢 Which material is good in tension but useless in compression? (a) a stone (b) a brick (c) a rope (d) a concrete block
33. 33.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
34. 34.🧱 Which material is best for the bars inside concrete? (a) plastic (b) steel (c) glass (d) rubber
35. 35.🔍 Which is the odd one out? (a) a crane lifting cable (b) a swing chain (c) a tug of war rope (d) a temple column
36. 36.🔄 Which design-process step is it to check it against goals? (a) Ask (b) Imagine (c) Create (d) Test
37. 37.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the pulley (d) the effort
38. 38.🏚️ Three solid model towers are made of the same material. Tower A is 160 cm tall on a 40 cm wide base, tower B is 240 cm tall on a 40 cm base and tower C is 280 cm tall on a 40 cm base. Which is the hardest to tip over? (a) tower A (b) tower B (c) tower C
39. 39.🔢 To build and test a straw bridge, which comes first: “build it with straws” or “read the challenge rules”? (a) read the challenge rules (b) build it with straws
40. 40.🏋️ An 18 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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