Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 360 · 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.♻️ Reduce, reuse or recycle: plant in old tyres? (a) reuse (b) reduce (c) recycle
2. 2.🔍 Which is the odd one out? (a) dry wood (b) iron (c) cotton cloth (d) rubber
3. 3.♻️ Reduce, reuse or recycle: carry a cloth bag? (a) recycle (b) reduce (c) reuse
4. 4.⚖️ A lever bar balances. The load is 280 N at ? cm from the fulcrum. The effort is 80 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.True or false: to fix the weak part is the Test step. (a) False (b) True
6. 6.💪 A cart is pulled to the right with 35 N and to the left with 30 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
7. 7.Which need does a fridge meet? (a) keep food fresh longer (b) store water for summer (c) make water safe to drink (d) carry many people far
8. 8.⚙️ Which simple machine is a claw hammer on a nail? (a) wedge (b) lever (c) pulley (d) inclined plane
9. 9.♻️ Is natural gas a renewable or a non-renewable energy source? (a) non-renewable (b) renewable
10. 10.Which of these uses a dome? (a) a shelf on two brackets (b) a round palace roof (c) a roof truss (d) an electric pylon
11. 11.🔺 A flat frame has 10 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
12. 12.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
13. 13.True or false: to think of wild ideas is the Ask step. (a) True (b) False
14. 14.True or false: a river is found in nature. (a) False (b) True
15. 15.True or false: a truss bridge side uses a dome. (a) False (b) True
16. 16.🧱 Which material is best for the core of an electric wire? (a) glass (b) wood (c) rubber (d) copper
17. 17.🔺 A flat frame has 4 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, a glass sheet 3 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
19. 19.♻️ Reduce, reuse or recycle: buy less packaging? (a) reuse (b) reduce (c) recycle
20. 20.🔺 A frame shaped like a triangle is made of straws joined by loose pins, with 0 corner-to-corner braces. Is it rigid or wobbly? (a) rigid (b) wobbly
21. 21.🔺 Which strong shape does an igloo use? (a) triangle (b) arch (c) beam (d) dome
22. 22.Which of these is a suspension bridge? (a) the simplest bridge (b) tall towers hold cables (c) a curve under the deck (d) pushes out on its ends
23. 23.⚖️ A seesaw balances. Kabir (720 N) sits 1 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.♻️ Reduce, reuse or recycle: print on both sides? (a) reuse (b) recycle (c) reduce
25. 25.🔢 To build and test a straw bridge, which is the LAST step? (a) build it with straws (b) sketch three ideas (c) strengthen the weak part (d) load it with coins
26. 26.Which of these is a suspension bridge? (a) the simplest bridge (b) stones squeezed together (c) the longest spans of all (d) a log across a stream
27. 27.🧱 Is cotton cloth an electrical conductor or an insulator? (a) an insulator (b) a conductor
28. 28.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) sand on a slippery path (d) oil on a squeaky hinge
29. 29.📋 Your team’s budget is ₹52. You must buy one roll of tape for ₹15. Straws cost ₹3 each. What is the greatest number of straws you can buy?
30. 30.📋 Criteria are … (a) the limits on money (b) the team names (c) the tools you use (d) goals a design must meet
31. 31.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
32. 32.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
33. 33.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
34. 34.True or false: “fit on a school desk” is a criterion (a goal). (a) True (b) False
35. 35.Which of these happens in the Ask step? (a) ask who will use it (b) try it out (c) pick the build order (d) measure its performance
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 90 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
37. 37.🔍 Which is the odd one out? (a) float for 1 minute (b) roll at least 2 metres (c) lift a cup of water (d) finish in 40 minutes
38. 38.♻️ Is coal a renewable or a non-renewable energy source? (a) renewable (b) non-renewable
39. 39.🔍 Which is the odd one out? (a) iron (b) glass (c) copper (d) graphite
40. 40.🧱 Is clay pottery an electrical conductor or an insulator? (a) a conductor (b) an insulator

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