Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 796 · 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 12 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 strong shape does a planetarium roof use? (a) arch (b) triangle (c) beam (d) dome
3. 3.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) anywhere (d) farther from the pivot
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, ice 1 N, a glass sheet 3 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
5. 5.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
6. 6.♻️ Which energy source will never run out? (a) petrol (b) sunlight (c) coal (d) diesel
7. 7.🧱 Which property matters most for a tea flask lining? (a) flexible (b) transparent (c) heat insulator (d) waterproof
8. 8.♻️ A family used to throw away 7 plastic bags a week. They now carry cloth bags. How many plastic bags do they save in 8 weeks?
9. 9.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
10. 10.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) False (b) True
11. 11.🔺 Which strong shape does a crane arm use? (a) dome (b) beam (c) triangle (d) arch
12. 12.🤝 In a design team, who checks the goals are met? (a) builder (b) tester (c) recorder (d) team leader
13. 13.🪢 Tension or compression: a tow rope on a car? (a) tension (b) compression
14. 14.💪 Which force is at work: an apple falls down? (a) friction (b) magnetic force (c) muscular force (d) gravity
15. 15.Which of these makes a building safer in earthquakes? (a) using a heavy roof (b) adding steel to concrete (c) raising heavy tanks high (d) stacking loose bricks
16. 16.📋 For a model bridge challenge, is “roll at least 2 metres” a constraint or a criterion? (a) a criterion (b) a constraint
17. 17.True or false: to drive in a nail, use a hand drill. (a) True (b) False
18. 18.🧱 Which property matters most for a window pane? (a) transparent (b) waterproof (c) electrical conductor (d) heat insulator
19. 19.📐 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?
20. 20.🏚️ Why are flexible joints good in an earthquake? (a) they stop shaking (b) they are cheap (c) they look nice (d) they bend, not break
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
22. 22.⚖️ A seesaw balances. Kabir (340 N) sits 4 m from the pivot on one side; Arjun (680 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
23. 23.True or false: a biomedical engineer designs factory machines. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) powder on a carrom board (b) sand on a slippery path (c) a smooth steel slide (d) a wet tiled floor
25. 25.True or false: a well winch handle is a wheel and axle. (a) False (b) True
26. 26.🌉 Which bridge type: “a log across a stream”? (a) beam bridge (b) arch bridge (c) suspension bridge
27. 27.🧪 Why repeat a test three times? (a) to get reliable results (b) to use more paper (c) the first is wrong (d) it looks busy
28. 28.🔍 Which is the odd one out? (a) use the same load (b) measure the same way (c) change only one thing (d) test it only once
29. 29.True or false: using flexible joints makes a building less safe in earthquakes. (a) True (b) False
30. 30.🤝 Is it good or poor teamwork to talk over others? (a) good teamwork (b) poor teamwork
31. 31.🦺 In the workshop, is it safe to touch a hot glue tip? (a) not safe (b) safe
32. 32.🌉 Which bridge type can cross the widest gap in one span? (a) suspension bridge (b) log bridge (c) arch bridge (d) beam bridge
33. 33.Which of these uses an arch? (a) a plank over a drain (b) a round palace roof (c) a bicycle frame (d) a fort gateway
34. 34.🤝 In a design team, who puts the model together? (a) tester (b) recorder (c) builder (d) team leader
35. 35.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
36. 36.Which of these happens in the Imagine step? (a) dream up possible fixes (b) redesign after testing (c) pick the build order (d) check it against goals
37. 37.🧪 The first prototype held 210 g. After the team improved it, the new prototype held 340 g. How many more grams did it hold?
38. 38.🧪 Three prototype bridges were tested with the same method. Design A held 290 g, design B held 190 g and design C held 240 g. Which design was the weakest? (a) design B (b) design A (c) design C
39. 39.🔄 Which design-process step is it to draw a labelled diagram? (a) Improve (b) Test (c) Ask (d) Plan
40. 40.True or false: a mechanical engineer designs artificial limbs. (a) True (b) False

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