Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 242 · 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.🔍 Which is the odd one out? (a) adding steel to concrete (b) stacking loose bricks (c) having a wide base (d) adding cross bracing
2. 2.Which of these is a wheel and axle? (a) an axe blade (b) a door stopper (c) a round doorknob (d) a jar lid
3. 3.🧪 Why do engineers make prototypes? (a) to decorate a room (b) to test ideas cheaply (c) to sell them at once (d) to avoid testing
4. 4.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) False (b) True
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 13 N, ice 4 N, a glass sheet 8 N. How many newtons more were needed on sandpaper than on ice?
6. 6.🦺 In the workshop, is it safe to put tools back after use? (a) not safe (b) safe
7. 7.🪝 A pulley system lifts a 360 N load with an effort of 180 N. What is its mechanical advantage (MA)?
8. 8.Which job does a computer engineer do? (a) builds rockets (b) designs a metro tunnel (c) designs a paint factory (d) builds a website
9. 9.🤝 In a design team, who runs the tests? (a) tester (b) materials manager (c) builder (d) recorder
10. 10.True or false: plucking a mango is a push. (a) True (b) False
11. 11.True or false: a mechanical engineer designs a metro tunnel. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a smooth steel slide (b) a rough doormat (c) a wet tiled floor (d) skating on ice
13. 13.🪝 A load of 320 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
14. 14.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Asha (130 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
16. 16.🏚️ 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
17. 17.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 200 g. How many more grams did it hold?
18. 18.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
19. 19.Which of these is made by engineers? (a) a water filter (b) a river (c) a rainbow (d) a volcano
20. 20.🔍 Which is the odd one out? (a) a temple column (b) a brick at a wall base (c) a tall bridge tower (d) a tent guy rope
21. 21.🧑‍🔧 Which kind of engineer builds a website? (a) aerospace (b) computer (c) civil (d) biomedical
22. 22.🔍 Which is the odd one out? (a) a mobile phone (b) a bicycle (c) a mountain (d) a satellite
23. 23.🔍 Which is the odd one out? (a) keeping a simple shape (b) making brittle joints (c) having a wide base (d) adding cross bracing
24. 24.🔄 Which design-process step is it to make a prototype? (a) Ask (b) Test (c) Imagine (d) Create
25. 25.Which job does a biomedical engineer do? (a) runs a fertiliser plant (b) designs a paint factory (c) designs aeroplane wings (d) builds hospital scanners
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 0 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
28. 28.⚖️ A lever bar balances. The load is 280 N at 10 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.🔍 Which is the odd one out? (a) a squeezed spring (b) a swing chain (c) a suspension cable (d) a stretched rubber band
30. 30.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) the bar is short (d) turning effects match
31. 31.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
32. 32.Which job does an electrical engineer do? (a) plans a power grid (b) designs bicycle gears (c) designs artificial limbs (d) designs a gearbox
33. 33.🤝 A team of 5 shares 30 equal jobs fairly. Each job takes 3 minutes. How many minutes does each person work?
34. 34.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 6 (d) 12
35. 35.🔺 Which strong shape does a truss bridge side use? (a) arch (b) dome (c) triangle (d) beam
36. 36.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) a wet tiled floor (d) chalk on a gym bar
37. 37.⚖️ A seesaw balances. Arjun (240 N) sits 3 m from the pivot on one side; Meena (360 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.💪 In which unit do we measure force? (a) litre (L) (b) metre (m) (c) second (s) (d) newton (N)
39. 39.True or false: “cables tied down at ends” is a suspension bridge. (a) False (b) True
40. 40.🔺 A frame shaped like a hexagon is made of straws joined by loose pins, with 1 corner-to-corner brace. Is it rigid or wobbly? (a) wobbly (b) rigid

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