Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 149 · 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.True or false: “use at most 20 straws” is a constraint (a limit). (a) False (b) True
2. 2.True or false: a cooking pot handle needs an electrical conductor. (a) True (b) False
3. 3.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the axle (c) the effort (d) the fulcrum
4. 4.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
5. 5.🪝 More rope sections holding a load means … (a) the load floats (b) no change (c) more effort needed (d) less effort needed
6. 6.Which of these happens in the Ask step? (a) define the problem (b) build the model (c) draw a labelled diagram (d) make a prototype
7. 7.♻️ Reduce, reuse or recycle: fix a dripping tap? (a) recycle (b) reduce (c) reuse
8. 8.🦺 Who should use hot glue guns and power tools in a kids’ project? (a) a stranger (b) any child alone (c) the youngest child (d) an adult
9. 9.🧱 Which material is best for a window pane? (a) wood (b) glass (c) steel (d) brick
10. 10.📋 Your team’s budget is ₹54. You must buy one roll of tape for ₹5. Straws cost ₹3 each. What is the greatest number of straws you can buy?
11. 11.True or false: a computer engineer keeps data safe online. (a) True (b) False
12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
13. 13.🔢 To build and test a straw bridge, which comes first: “choose and draw one” or “build it with straws”? (a) choose and draw one (b) build it with straws
14. 14.Which of these is a beam bridge? (a) tall towers hold cables (b) a curve under the deck (c) stones squeezed together (d) a flat deck on piers
15. 15.🏚️ Where should heavy water tanks go in a quake zone? (a) hanging outside (b) low down (c) on a thin pole (d) on the very top
16. 16.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 380 g. How many more grams did it hold?
17. 17.🔧 Which tool would you use to grip and bend wire? (a) a tape measure (b) pliers (c) a screwdriver (d) a hammer
18. 18.🧱 Is aluminium an electrical conductor or an insulator? (a) an insulator (b) a conductor
19. 19.🔺 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?
20. 20.📋 A design meets every criterion but costs more than the budget. Is it acceptable? (a) only if it is red (b) yes, always (c) no, it breaks a limit (d) yes, it works
21. 21.🤝 In a design team, who runs the tests? (a) materials manager (b) builder (c) tester (d) team leader
22. 22.🤝 How do engineers share a design with others? (a) clear labelled sketches (b) only talking fast (c) secret notes (d) no drawings at all
23. 23.🌉 A beam bridge 270 m long rests on the two river banks and on piers in between, making equal spans of 45 m. How many piers are there?
24. 24.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
25. 25.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 13 N, ice 3 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
27. 27.Which of these is recycle (make new things)? (a) switch off unused lights (b) carry a cloth bag (c) pulp old paper (d) plant in old tyres
28. 28.True or false: a satellite is found in nature. (a) True (b) False
29. 29.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) time taken (d) colour of bar
30. 30.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
31. 31.🔍 Which is the odd one out? (a) a railway track (b) a ceiling fan (c) a mountain (d) a lift
32. 32.🛠️ Is a lift made by engineers or found in nature? (a) made by engineers (b) found in nature
33. 33.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Zoya (720 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
34. 34.⚖️ A lever bar balances. The load is 240 N at 50 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 2 (c) class 3
36. 36.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 240 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.Which of these makes a building less safe in earthquakes? (a) keeping a simple shape (b) adding cross bracing (c) having a wide base (d) stacking loose bricks
38. 38.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
39. 39.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
40. 40.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?

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