Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 891 · 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.📐 On a plan, 1 cm stands for 10 m. A wall is 13 cm long on the plan. How long is the real wall, in metres?
2. 2.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
3. 3.♻️ Which is the BEST order to think about waste? (a) reuse, recycle, reduce (b) recycle, reuse, reduce (c) burn, bury, forget (d) reduce, reuse, recycle
4. 4.True or false: a banyan tree is found in nature. (a) True (b) False
5. 5.📐 How many centimetres are in 1 metre? (a) 10 (b) 100 (c) 1000 (d) 60
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a carpet 5 N, sandpaper 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 80 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
8. 8.🧑‍🔧 Which kind of engineer builds rockets? (a) chemical (b) mechanical (c) aerospace (d) computer
9. 9.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
11. 11.True or false: to leave tools on the floor is safe. (a) True (b) False
12. 12.🏚️ What do engineers use to test models of buildings for earthquakes? (a) a telescope (b) a fridge (c) a microscope (d) a shake table
13. 13.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
14. 14.⚖️ A seesaw balances. Meena (800 N) sits ? m from the pivot on one side; Kabir (400 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
15. 15.⚙️ Which simple machine is a seesaw? (a) lever (b) pulley (c) wheel and axle (d) inclined plane
16. 16.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🔧 Which tool would you use to measure a long length? (a) a saw (b) a hammer (c) a tape measure (d) a spanner
18. 18.♻️ Reduce, reuse or recycle: melt glass into new jars? (a) reduce (b) recycle (c) reuse
19. 19.True or false: a biomedical engineer designs knee implants. (a) False (b) True
20. 20.📋 A design meets every criterion but costs more than the budget. Is it acceptable? (a) yes, always (b) only if it is red (c) no, it breaks a limit (d) yes, it works
21. 21.🪢 A sign weighing 120 N hangs from 2 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
22. 22.🔍 Which is the odd one out? (a) aluminium (b) rubber (c) brass (d) copper
23. 23.Which of these uses triangles? (a) a shelf on two brackets (b) a fort gateway (c) a round palace roof (d) a truss bridge side
24. 24.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 180 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
25. 25.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 3 (c) class 1
26. 26.True or false: a window pane needs a transparent material. (a) True (b) False
27. 27.🧱 Is cotton cloth an electrical conductor or an insulator? (a) a conductor (b) an insulator
28. 28.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
29. 29.🔺 A flat frame has 9 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.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Zoya (180 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.🪝 A bucket weighing 280 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
32. 32.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “read the challenge rules”? (a) read the challenge rules (b) strengthen the weak part
33. 33.🔺 How do engineers stop a square frame from wobbling? (a) take off a side (b) make it bigger (c) add a diagonal brace (d) paint it
34. 34.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) a wet tiled floor (d) a grippy rubber sole
35. 35.♻️ A family used to throw away 6 plastic bags a week. They now carry cloth bags. How many plastic bags do they save in 8 weeks?
36. 36.🤝 A team plans for 60 minutes, builds for 30 minutes and then tests for 25 minutes, one after another. How many minutes is that in all?
37. 37.🦺 Who should use hot glue guns and power tools in a kids’ project? (a) any child alone (b) a stranger (c) the youngest child (d) an adult
38. 38.True or false: to find the limits is the Plan step. (a) True (b) False
39. 39.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 10 (c) 3 (d) 6
40. 40.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?

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