Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 643 · 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 bucket weighing 490 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.🔺 A frame shaped like a pentagon is made of straws joined by loose pins, with 2 corner-to-corner braces. Is it rigid or wobbly? (a) wobbly (b) rigid
3. 3.♻️ A sustainable design … (a) lasts one day (b) wastes water (c) uses the most plastic (d) protects the future
4. 4.Which of these is an arch bridge? (a) cables tied down at ends (b) a rope bridge in hills (c) pushes out on its ends (d) good for short gaps
5. 5.🌉 What holds up a long beam bridge in the middle? (a) nothing (b) balloons (c) piers (d) cables only
6. 6.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) stop all friction (d) use a smaller force
7. 7.Which of these is recycle (make new things)? (a) carry a cloth bag (b) refill a water bottle (c) turn plastic into tiles (d) plant in old tyres
8. 8.🔍 Which is the odd one out? (a) rubber (b) copper (c) brass (d) aluminium
9. 9.🤝 Is it good or poor teamwork to blame others for faults? (a) good teamwork (b) poor teamwork
10. 10.True or false: adding cross bracing makes a building less safe in earthquakes. (a) False (b) True
11. 11.🏚️ Does making brittle joints make a building safer or less safe in an earthquake? (a) safer in earthquakes (b) less safe
12. 12.⚖️ A lever bar balances. The load is 60 N at ? cm from the fulcrum. The effort is 100 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.Which of these needs a heat insulator? (a) a car seat belt (b) a cooking pot handle (c) a window pane (d) a water tank
14. 14.📐 On a plan, 1 cm stands for 2 m. A wall is 4 cm long on the plan. How long is the real wall, in metres?
15. 15.⚙️ Which simple machine is a crowbar? (a) wheel and axle (b) lever (c) screw (d) pulley
16. 16.📋 Criteria are … (a) the limits on money (b) the team names (c) the tools you use (d) goals a design must meet
17. 17.🪝 A winch has a wheel of radius 7 cm and an axle of radius 1 cm. What effort on the wheel lifts a 910 N bucket on the axle, in newtons? (ideal)
18. 18.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
19. 19.Which of these makes a building less safe in earthquakes? (a) keeping a simple shape (b) adding steel to concrete (c) using flexible joints (d) building tall and narrow
20. 20.🔺 A frame shaped like a hexagon is made of straws joined by loose pins, with 3 corner-to-corner braces. Is it rigid or wobbly? (a) wobbly (b) rigid
21. 21.True or false: a nutcracker is a wheel and axle. (a) False (b) True
22. 22.True or false: a fishing rod is a class 2 lever (load in the middle). (a) True (b) False
23. 23.True or false: leaving out steel bars makes a building less safe in earthquakes. (a) True (b) False
24. 24.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to look nice (c) to go slower (d) to save rubber
25. 25.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
26. 26.⚖️ A seesaw balances. Meena (360 N) sits 3 m from the pivot on one side; Arjun (540 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
27. 27.♻️ Reduce, reuse or recycle: refill a water bottle? (a) reuse (b) reduce (c) recycle
28. 28.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
29. 29.🧱 Which property matters most for a magnifier lens? (a) transparent (b) heat insulator (c) flexible (d) electrical conductor
30. 30.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
32. 32.True or false: a swing chain is in compression (pushed). (a) True (b) False
33. 33.💪 A cart is pulled to the right with 30 N and to the left with 35 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
34. 34.True or false: a tyre with deep treads gives more friction. (a) True (b) False
35. 35.📋 A constraint is … (a) a kind of glue (b) a limit you must keep to (c) a final test (d) a goal for success
36. 36.True or false: to listen to every idea is poor teamwork. (a) True (b) False
37. 37.🤝 A teammate’s idea seems odd. What should you do first? (a) ignore it (b) laugh at it (c) listen and ask why (d) walk away
38. 38.💪 Two children push a box to the right, one with 30 N and the other with 80 N. What is the net (total) force on the box, in newtons?
39. 39.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) False (b) True
40. 40.⚖️ A lever bar balances. The load is 540 N at ? cm from the fulcrum. The effort is 120 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?

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