Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 315 · 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 of these uses triangles? (a) a crane arm (b) a shelf on two brackets (c) a curved stone doorway (d) a lintel over a door
2. 2.📋 Your team’s budget is ₹40. You must buy one roll of tape for ₹20. Straws cost ₹2 each. What is the greatest number of straws you can buy?
3. 3.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 160 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
4. 4.🧱 Which material is best for the core of an electric wire? (a) rubber (b) copper (c) glass (d) wood
5. 5.⚖️ A lever bar balances. The load is 560 N at 20 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.🌉 Which bridge type: “deck hangs from cables”? (a) arch bridge (b) suspension bridge (c) beam bridge
7. 7.🔺 Why can an arch carry heavy loads? (a) it is hollow (b) it is very light (c) it works in compression (d) it bends easily
8. 8.💪 Which force is at work: brakes stop a bicycle? (a) muscular force (b) gravity (c) magnetic force (d) friction
9. 9.Which of these is caused by gravity? (a) rain falls to the ground (b) a fridge magnet sticks (c) a compass needle turns (d) rubbing hands warms them
10. 10.⚙️ Which simple machine is an axe blade? (a) wedge (b) inclined plane (c) lever (d) wheel and axle
11. 11.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
12. 12.True or false: chalk on a gym bar gives more friction. (a) True (b) False
13. 13.True or false: a seesaw is a class 2 lever (load in the middle). (a) False (b) True
14. 14.⚖️ Turning effect = force × … (a) time taken (b) distance from fulcrum (c) mass of fulcrum (d) colour of bar
15. 15.True or false: a movable pulley stays in one place. (a) False (b) True
16. 16.🔺 One side of a straw bridge is a row of 6 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
17. 17.🧱 Which property matters most for a roof sheet? (a) transparent (b) electrical conductor (c) waterproof (d) flexible
18. 18.True or false: plucking a mango is a push. (a) True (b) False
19. 19.🧑‍🔧 Which kind of engineer designs a flyover? (a) electrical (b) mechanical (c) chemical (d) civil
20. 20.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
21. 21.True or false: “use at most 20 straws” is a constraint (a limit). (a) True (b) False
22. 22.🏋️ A force of 380 N did 3040 J of work. How many metres did the object move?
23. 23.🧱 Is cotton cloth an electrical conductor or an insulator? (a) an insulator (b) a conductor
24. 24.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
25. 25.🔧 Which tool would you use to drive in a nail? (a) a spanner (b) a hammer (c) a hand drill (d) a tape measure
26. 26.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
27. 27.⚖️ A lever bar balances. The load is 30 N at 30 cm from the fulcrum. The effort is 30 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
29. 29.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
30. 30.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 3 (c) class 1
31. 31.True or false: to measure the same way is poor testing. (a) False (b) True
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
33. 33.True or false: a mechanical engineer designs factory machines. (a) False (b) True
34. 34.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
35. 35.🔢 To follow the engineering design process, which is the LAST step? (a) Test (b) Improve (c) Plan (d) Ask
36. 36.🔺 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
37. 37.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
38. 38.Which of these is a suspension bridge? (a) stones squeezed together (b) a rope bridge in hills (c) a log across a stream (d) the simplest bridge
39. 39.♻️ Which energy source will never run out? (a) diesel (b) sunlight (c) petrol (d) coal
40. 40.📐 A model car is drawn so that 1 cm stands for 40 cm. The car is 2 cm long in the drawing. How long is the real car, in centimetres?

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