Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 455 · 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.🔺 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?
2. 2.⚙️ A screw is really … (a) a ramp wrapped round (b) a kind of wheel (c) a bent lever (d) a tiny pulley
3. 3.♻️ Is flowing river water a renewable or a non-renewable energy source? (a) non-renewable (b) renewable
4. 4.Which of these uses a beam? (a) a planetarium roof (b) a slab over a canal (c) a round palace roof (d) an electric pylon
5. 5.📋 For a model bridge challenge, is “roll at least 2 metres” a constraint or a criterion? (a) a criterion (b) a constraint
6. 6.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
7. 7.🔢 To follow the engineering design process, which comes first: “Ask” or “Test”? (a) Test (b) Ask
8. 8.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
9. 9.True or false: a bicycle is found in nature. (a) True (b) False
10. 10.Which of these makes a building less safe in earthquakes? (a) keeping a simple shape (b) using a heavy roof (c) adding cross bracing (d) having a wide base
11. 11.Which of these happens in the Imagine step? (a) check it against goals (b) dream up possible fixes (c) ask who will use it (d) redesign after testing
12. 12.🪢 A concrete slab weighing 2100 N rests evenly on 3 identical pillars. What compression force does each pillar carry, in newtons?
13. 13.🔢 To follow the engineering design process, which comes first: “Plan” or “Imagine”? (a) Plan (b) Imagine
14. 14.🪢 Tension is a force that … (a) pushes or squeezes (b) heats things (c) pulls or stretches (d) turns things
15. 15.True or false: to share the work fairly is poor teamwork. (a) True (b) False
16. 16.Which of these is a screw? (a) a jar lid (b) a door stopper (c) a seesaw (d) a knife edge
17. 17.📐 How many millimetres are in 1 centimetre? (a) 5 (b) 100 (c) 10 (d) 1000
18. 18.Which of these uses a beam? (a) an igloo (b) a curved stone doorway (c) a plank over a drain (d) a round palace roof
19. 19.Which of these is a beam bridge? (a) tall towers hold cables (b) a flat deck on piers (c) deck hangs from cables (d) a curve under the deck
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
21. 21.🔍 Which is the odd one out? (a) carry scissors closed (b) use a cracked tool (c) cut towards your hand (d) touch a hot glue tip
22. 22.What does the builder do? (a) puts the model together (b) checks the goals are met (c) keeps the design notes (d) tracks what is used up
23. 23.🤝 In a design team, who cuts and joins parts? (a) materials manager (b) tester (c) builder (d) recorder
24. 24.Which of these is reuse (use again)? (a) print on both sides (b) pulp old paper (c) switch off unused lights (d) give old books away
25. 25.🔺 Which strong shape does a curved stone doorway use? (a) arch (b) dome (c) triangle (d) beam
26. 26.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
27. 27.🔍 Which is the odd one out? (a) fit on a school desk (b) be under 30 cm tall (c) hold up 500 g (d) spend at most ₹100
28. 28.🔍 Which is the odd one out? (a) a ceiling fan (b) a water filter (c) a dam (d) a mountain
29. 29.🔍 Which is the odd one out? (a) a door stopper (b) a jar lid (c) a chisel (d) a knife edge
30. 30.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) gravity (c) muscular force (d) friction
31. 31.Which of these is made by engineers? (a) a river (b) a mountain (c) a rainbow (d) a lift
32. 32.📋 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
33. 33.🪢 A concrete slab weighing 9200 N rests evenly on 4 identical pillars. What compression force does each pillar carry, in newtons?
34. 34.⚖️ A seesaw balances. Ravi (510 N) sits ? m from the pivot on one side; Asha (680 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
35. 35.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.True or false: to change only one thing is poor testing. (a) True (b) False
37. 37.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
38. 38.True or false: an electrical engineer designs hearing aids. (a) True (b) False
39. 39.🔢 To follow the engineering design process, which comes first: “Create” or “Ask”? (a) Create (b) Ask
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3

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