Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 868 · 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.🏚️ Why are flexible joints good in an earthquake? (a) they look nice (b) they stop shaking (c) they are cheap (d) they bend, not break
2. 2.🔺 One side of a straw bridge is a row of 7 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
3. 3.True or false: a computer engineer keeps data safe online. (a) True (b) False
4. 4.True or false: to test it only once is poor testing. (a) True (b) False
5. 5.♻️ Reduce, reuse or recycle: turn plastic into tiles? (a) reuse (b) reduce (c) recycle
6. 6.Which job is a hammer for? (a) measure a long length (b) make a hole in wood (c) grip and bend wire (d) drive in a nail
7. 7.True or false: to play near a moving drill is safe. (a) False (b) True
8. 8.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.🪢 A sign weighing 550 N hangs from 5 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
10. 10.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a box pushed on carpet (c) chalk on a gym bar (d) a tyre with deep treads
11. 11.Which job does a computer engineer do? (a) runs a fertiliser plant (b) designs artificial limbs (c) designs factory machines (d) builds a website
12. 12.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
13. 13.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
14. 14.🦺 In the workshop, is it safe to tie back long hair? (a) not safe (b) safe
15. 15.📋 Criterion: the model bridge must hold at least 900 g. In the test it held 850 g. Does it meet the criterion? (a) No (b) Yes
16. 16.True or false: a door stopper is a wedge. (a) False (b) True
17. 17.True or false: “fit on a school desk” is a constraint (a limit). (a) True (b) False
18. 18.True or false: your forearm is a class 3 lever (effort in the middle). (a) False (b) True
19. 19.Which of these is in tension (pulled)? (a) a tall bridge tower (b) a pillar under a roof (c) a suspension cable (d) a bridge pier
20. 20.Which of these is a screw? (a) a jar lid (b) a claw hammer on a nail (c) a playground slide (d) a door stopper
21. 21.Which of these is found in nature? (a) a mobile phone (b) a bicycle (c) a river (d) a railway track
22. 22.🧑‍🔧 Which branch of engineering designs buildings, roads and bridges? (a) computer (b) civil (c) biomedical (d) chemical
23. 23.♻️ A family used to throw away 2 plastic bags a week. They now carry cloth bags. How many plastic bags do they save in 10 weeks?
24. 24.True or false: “use at most 20 straws” is a criterion (a goal). (a) False (b) True
25. 25.🛠️ People need to cross a wide river. Which invention helps? (a) a solar panel (b) a bridge (c) a water filter (d) a lift
26. 26.🔺 How do engineers stop a square frame from wobbling? (a) paint it (b) take off a side (c) make it bigger (d) add a diagonal brace
27. 27.🔍 Which is the odd one out? (a) a tyre with deep treads (b) oil on a squeaky hinge (c) a wet tiled floor (d) skating on ice
28. 28.🪝 A well winch has a handle (wheel) of radius 7 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
29. 29.True or false: “a log across a stream” is a suspension bridge. (a) False (b) True
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a carpet 12 N, sandpaper 15 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
31. 31.📐 On a plan, 1 cm stands for 2 m. A real bridge is 26 m long. How long is it on the plan, in centimetres?
32. 32.🔍 Which is the odd one out? (a) roll at least 2 metres (b) float for 1 minute (c) fit on a school desk (d) hold up 500 g
33. 33.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
34. 34.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 50 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.True or false: a crowbar is a class 3 lever (effort in the middle). (a) False (b) True
36. 36.True or false: “a curve under the deck” is an arch bridge. (a) True (b) False
37. 37.🧪 A paper bridge was tested three times. It held 150 g, 120 g and 180 g. What is the mean (average) load it held, in grams?
38. 38.🔍 Which is the odd one out? (a) tie back long hair (b) run while holding tools (c) clamp wood before sawing (d) cut away from your body
39. 39.💪 A box weighs 540 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)

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