Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 687 · 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.♻️ Is sunlight a renewable or a non-renewable energy source? (a) non-renewable (b) renewable
2. 2.⚖️ A lever bar balances. The load is 40 N at 50 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.True or false: building tall and narrow makes a building less safe in earthquakes. (a) False (b) True
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a glass sheet 6 N, a wooden plank 9 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
5. 5.🧱 Is glass an electrical conductor or an insulator? (a) a conductor (b) an insulator
6. 6.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
8. 8.♻️ Reduce, reuse or recycle: refill a water bottle? (a) reuse (b) reduce (c) recycle
9. 9.🦺 In the workshop, is it safe to tie back long hair? (a) not safe (b) safe
10. 10.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
11. 11.🔺 One side of a straw bridge is a row of 8 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
12. 12.True or false: a roof truss uses a beam. (a) True (b) False
13. 13.🌉 In a stone arch bridge, the stones are in … (a) no force (b) tension (c) friction (d) compression
14. 14.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 380 g. How many more grams did it hold?
15. 15.True or false: flowing river water is a renewable energy source. (a) False (b) True
16. 16.🏚️ What do engineers use to test models of buildings for earthquakes? (a) a telescope (b) a shake table (c) a microscope (d) a fridge
17. 17.🪢 Tension or compression: a suspension cable? (a) tension (b) compression
18. 18.🔢 To follow the engineering design process, what comes right after “Create”? (a) Imagine (b) Test (c) Plan (d) Ask
19. 19.⚖️ Which class of lever is a pair of pliers? (a) class 1 (b) class 3 (c) class 2
20. 20.🔄 Which design-process step is it to try it out? (a) Imagine (b) Test (c) Plan (d) Improve
21. 21.📋 Your team’s budget is ₹46. You must buy one roll of tape for ₹10. Straws cost ₹5 each. What is the greatest number of straws you can buy?
22. 22.True or false: to use a cracked tool is not safe. (a) False (b) True
23. 23.True or false: “float for 1 minute” is a criterion (a goal). (a) True (b) False
24. 24.🪝 A winch has a wheel of radius 20 cm and an axle of radius 5 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
25. 25.🧑‍🔧 Which kind of engineer designs a flyover? (a) computer (b) electrical (c) civil (d) biomedical
26. 26.🌉 A beam bridge 50 m long rests on the two river banks and on piers in between, making equal spans of 25 m. How many piers are there?
27. 27.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
28. 28.🧪 Why do engineers make prototypes? (a) to sell them at once (b) to test ideas cheaply (c) to avoid testing (d) to decorate a room
29. 29.Which of these is a lever? (a) a screw jack (b) a bottle cap (c) a seesaw (d) a well-bucket rope wheel
30. 30.🪢 Tension or compression: a bridge pier? (a) compression (b) tension
31. 31.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
32. 32.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
33. 33.⚖️ A seesaw balances. Ravi (? 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?
34. 34.🤝 A team plans for 25 minutes, builds for 25 minutes and then tests for 10 minutes, one after another. How many minutes is that in all?
35. 35.True or false: an aerospace engineer designs a gearbox. (a) False (b) True
36. 36.⚖️ 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 3 (c) class 2
37. 37.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
38. 38.🤝 A team plans for 20 minutes, builds for 40 minutes and then tests for 15 minutes, one after another. How many minutes is that in all?
39. 39.Which of these is an arch bridge? (a) a flat deck on piers (b) cables tied down at ends (c) the longest spans of all (d) a curve under the deck
40. 40.True or false: a fixed pulley needs effort = load. (a) False (b) True

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