Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 127 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, a glass sheet 3 N, a wooden plank 5 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
2. 2.🪝 More rope sections holding a load means … (a) no change (b) less effort needed (c) more effort needed (d) the load floats
3. 3.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
4. 4.🌉 Which bridge type: “pushes out on its ends”? (a) beam bridge (b) arch bridge (c) suspension bridge
5. 5.♻️ Is coal a renewable or a non-renewable energy source? (a) renewable (b) non-renewable
6. 6.🧪 The first prototype held 200 g. After the team improved it, the new prototype held 380 g. How many more grams did it hold?
7. 7.Which job does a chemical engineer do? (a) designs car engines (b) designs satellites (c) designs a paint factory (d) keeps data safe online
8. 8.🦺 In the workshop, is it safe to tie back long hair? (a) safe (b) not safe
9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
10. 10.⚙️ Which simple machine is a screw jack? (a) inclined plane (b) wedge (c) screw (d) pulley
11. 11.Which of these makes a building less safe in earthquakes? (a) raising heavy tanks high (b) adding steel to concrete (c) using a light roof (d) having a wide base
12. 12.True or false: to run while holding tools is not safe. (a) True (b) False
13. 13.📋 For a model bridge challenge, is “fit on a school desk” a constraint or a criterion? (a) a constraint (b) a criterion
14. 14.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
15. 15.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🔍 Which is the odd one out? (a) powder on a carrom board (b) a tyre with deep treads (c) chalk on a gym bar (d) a grippy rubber sole
17. 17.True or false: to think of wild ideas is the Plan step. (a) True (b) False
18. 18.📋 For a model bridge challenge, is “finish in 40 minutes” a constraint or a criterion? (a) a criterion (b) a constraint
19. 19.🧪 Is it good or poor testing to change only one thing? (a) poor testing (b) good testing
20. 20.Which of these makes a building safer in earthquakes? (a) leaving out steel bars (b) making brittle joints (c) building tall and narrow (d) keeping a simple shape
21. 21.🤝 A team plans for 15 minutes, builds for 25 minutes and then tests for 5 minutes, one after another. How many minutes is that in all?
22. 22.True or false: a cooking pot handle needs a heat insulator. (a) False (b) True
23. 23.📋 Criterion: the model bridge must hold at least 600 g. In the test it held 550 g. Does it meet the criterion? (a) Yes (b) No
24. 24.🔍 Which is the odd one out? (a) hide a failed test (b) use the same load (c) change lots at once (d) use a new load each time
25. 25.📋 Your team’s budget is ₹91. You must buy one roll of tape for ₹5. Straws cost ₹3 each. What is the greatest number of straws you can buy?
26. 26.Which of these happens in the Improve step? (a) build the model (b) follow the plan to build (c) pick the build order (d) make it better, retest
27. 27.🔺 A frame shaped like a hexagon is made of straws joined by loose pins, with 0 corner-to-corner braces. Is it rigid or wobbly? (a) rigid (b) wobbly
28. 28.Which of these is a screw? (a) a seesaw (b) a bottle opener (c) a well winch handle (d) a jar lid
29. 29.🔺 A flat frame has 11 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
30. 30.🔧 Which tool would you use to measure a long length? (a) a hand drill (b) a spirit level (c) a spanner (d) a tape measure
31. 31.Which of these is in tension (pulled)? (a) a squeezed spring (b) a bridge pier (c) a suspension cable (d) a tall bridge tower
32. 32.Which need does a lift meet? (a) keep food fresh longer (b) carry many people far (c) reach a top floor fast (d) make water safe to drink
33. 33.Which of these needs an electrical conductor? (a) a car windscreen (b) a roof sheet (c) the core of a wire (d) an umbrella cover
34. 34.True or false: a computer engineer designs a gearbox. (a) False (b) True
35. 35.Which of these is recycle (make new things)? (a) switch off unused lights (b) melt glass into new jars (c) print on both sides (d) refill a water bottle
36. 36.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) both weights are equal (d) the fulcrum moves
37. 37.True or false: sunlight is a non-renewable energy source. (a) False (b) True
38. 38.🦺 What protects your eyes when sawing or drilling? (a) nothing (b) a cap (c) safety goggles (d) sunglasses
39. 39.💪 In a tug of war, one team pulls right with 30 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
40. 40.True or false: a mechanical engineer plans a dam. (a) False (b) True

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