Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 939 · 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.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 80 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
2. 2.🔍 Which is the odd one out? (a) a box pushed on carpet (b) skating on ice (c) a smooth steel slide (d) oil on a squeaky hinge
3. 3.📋 Criterion: the model bridge must hold at least 200 g. In the test it held 150 g. Does it meet the criterion? (a) Yes (b) No
4. 4.🔍 Which is the odd one out? (a) a mobile phone (b) a coral reef (c) a mountain (d) a banyan tree
5. 5.True or false: “use only paper and tape” is a criterion (a goal). (a) True (b) False
6. 6.📋 For a model bridge challenge, is “roll at least 2 metres” a constraint or a criterion? (a) a criterion (b) a constraint
7. 7.⚖️ A seesaw balances. Ravi (340 N) sits ? m from the pivot on one side; Arjun (680 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
8. 8.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
9. 9.🔍 Which is the odd one out? (a) glass (b) cotton cloth (c) clay pottery (d) graphite
10. 10.🏚️ Three solid model towers are made of the same material. Tower A is 80 cm tall on a 40 cm wide base, tower B is 60 cm tall on a 20 cm base and tower C is 120 cm tall on a 30 cm base. Which is the easiest to tip over? (a) tower A (b) tower C (c) tower B
11. 11.True or false: drawing up a well bucket is a pull. (a) True (b) False
12. 12.🪝 A load of 240 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
13. 13.What does the materials manager do? (a) keeps the team on track (b) collects the supplies (c) puts the model together (d) writes down results
14. 14.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) colour of bar (d) distance from fulcrum
15. 15.True or false: a mountain is made by engineers. (a) False (b) True
16. 16.🤝 A team plans for 40 minutes, builds for 30 minutes and then tests for 20 minutes, one after another. How many minutes is that in all?
17. 17.💪 A bag has a mass of 33 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
18. 18.🛠️ Is a ceiling fan made by engineers or found in nature? (a) found in nature (b) made by engineers
19. 19.🔍 Which is the odd one out? (a) brass (b) glass (c) plastic (d) clay pottery
20. 20.📐 A beam is 460 cm long. How long is it in metres? =
21. 21.🔄 Is the engineering design process done only once? (a) only on Sundays (b) only for big jobs (c) yes, only once (d) no, it repeats
22. 22.🏚️ Why are flexible joints good in an earthquake? (a) they look nice (b) they are cheap (c) they bend, not break (d) they stop shaking
23. 23.🔄 Which design-process step is it to fix the weak part? (a) Imagine (b) Improve (c) Create (d) Test
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 7 N, sandpaper 9 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
25. 25.⚖️ A lever bar balances. The load is 700 N at 50 cm from the fulcrum. The effort is 350 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🛠️ Is a mountain made by engineers or found in nature? (a) made by engineers (b) found in nature
27. 27.Which of these is caused by gravity? (a) pedalling a cycle (b) rain falls to the ground (c) rubbing hands warms them (d) shoes grip the floor
28. 28.Which job does an electrical engineer do? (a) designs power lines (b) designs car engines (c) plans a dam (d) designs bicycle gears
29. 29.🏚️ Does having a wide base make a building safer or less safe in an earthquake? (a) less safe (b) safer in earthquakes
30. 30.🧱 Which material is best for a cooking pot handle? (a) wood or plastic (b) aluminium (c) iron (d) copper
31. 31.🔄 After testing, a design does not work well. What comes next? (a) Improve (b) Imagine (c) Ask (d) give up
32. 32.♻️ A sustainable design … (a) wastes water (b) uses the most plastic (c) protects the future (d) lasts one day
33. 33.🤝 In a design team, who tracks what is used up? (a) materials manager (b) recorder (c) builder (d) team leader
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
35. 35.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Arjun (440 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.🌉 Which bridge type can cross the widest gap in one span? (a) beam bridge (b) log bridge (c) suspension bridge (d) arch bridge
37. 37.True or false: drawing up a well bucket is a push. (a) False (b) True
38. 38.True or false: to test it only once is good testing. (a) True (b) False
39. 39.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
40. 40.True or false: “lift a cup of water” is a constraint (a limit). (a) True (b) False

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