Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 926 · 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 bucket weighing 480 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.🪝 A pulley system lifts a 460 N load with an effort of 230 N. What is its mechanical advantage (MA)?
3. 3.🔍 Which is the odd one out? (a) let adults use hot glue (b) carry scissors closed (c) cut towards your hand (d) clamp wood before sawing
4. 4.⚖️ A seesaw balances. Meena (450 N) sits ? m from the pivot on one side; Kabir (600 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
5. 5.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
6. 6.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
7. 7.True or false: a playground slide is an inclined plane. (a) False (b) True
8. 8.🧪 A paper bridge was tested three times. It held 270 g, 180 g and 150 g. What is the mean (average) load it held, in grams?
9. 9.🔧 Which tool would you use to tighten a nut? (a) sandpaper (b) a hammer (c) a tape measure (d) a spanner
10. 10.🌉 Which bridge type can cross the widest gap in one span? (a) suspension bridge (b) beam bridge (c) arch bridge (d) log bridge
11. 11.🌉 A beam bridge 20 m long is split by piers into 2 equal spans. How long is each span, in metres?
12. 12.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
13. 13.📐 A beam is 540 cm long. How long is it in metres? =
14. 14.⚖️ A lever bar balances. The load is 240 N at ? cm from the fulcrum. The effort is 90 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
16. 16.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
18. 18.True or false: “good for short gaps” is a beam bridge. (a) True (b) False
19. 19.Which of these is a suspension bridge? (a) stones squeezed together (b) a curve under the deck (c) tall towers hold cables (d) a log across a stream
20. 20.🔧 Which tool would you use to drive in a nail? (a) a hammer (b) a saw (c) sandpaper (d) a protractor
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
22. 22.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 1 (c) class 2
23. 23.True or false: “carry 10 coins” is a constraint (a limit). (a) False (b) True
24. 24.True or false: a water filter helps people make water safe to drink. (a) False (b) True
25. 25.Which of these is a beam bridge? (a) deck hangs from cables (b) a rope bridge in hills (c) tall towers hold cables (d) a flat deck on piers
26. 26.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Meena (200 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.🌉 In a suspension bridge, the main cables are in … (a) compression (b) no force (c) tension (d) friction
28. 28.True or false: fitting rubber base pads makes a building less safe in earthquakes. (a) False (b) True
29. 29.🏚️ Three solid model towers are made of the same material. Tower A is 60 cm tall on a 20 cm wide base, tower B is 40 cm tall on a 10 cm base and tower C is 10 cm tall on a 10 cm base. Which is the easiest to tip over? (a) tower A (b) tower B (c) tower C
30. 30.♻️ Is ocean wave energy a renewable or a non-renewable energy source? (a) renewable (b) non-renewable
31. 31.True or false: “keep ice for 1 hour” is a criterion (a goal). (a) True (b) False
32. 32.📋 For a model bridge challenge, is “be under 30 cm tall” a constraint or a criterion? (a) a criterion (b) a constraint
33. 33.🦺 In the workshop, is it safe to leave tools on the floor? (a) safe (b) not safe
34. 34.🛞 Friction acts … (a) with the motion (b) only on ice (c) against the motion (d) only upwards
35. 35.🧪 The first prototype held 180 g. After the team improved it, the new prototype held 340 g. How many more grams did it hold?
36. 36.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?
37. 37.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
39. 39.🔍 Which is the odd one out? (a) a temple column (b) a pillar under a roof (c) a tall bridge tower (d) a tent guy rope
40. 40.True or false: to brainstorm many ideas is the Ask step. (a) True (b) False

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