Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 667 · 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.Which job does a mechanical engineer do? (a) designs hearing aids (b) wires a new building (c) lays out a highway (d) designs car engines
2. 2.🏚️ Why are flexible joints good in an earthquake? (a) they look nice (b) they bend, not break (c) they stop shaking (d) they are cheap
3. 3.🔍 Which is the odd one out? (a) adding cross bracing (b) leaving out steel bars (c) using flexible joints (d) using a light roof
4. 4.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 3 (c) class 2
5. 5.⚖️ A lever bar balances. The load is 900 N at 20 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.Which of these is a wheel and axle? (a) a bottle cap (b) a wheelchair ramp (c) a water tap handle (d) a bottle opener
7. 7.Which of these is found in nature? (a) a coral reef (b) a water filter (c) a dam (d) a bicycle
8. 8.🧪 Three prototype bridges were tested with the same method. Design A held 210 g, design B held 110 g and design C held 160 g. Which design was the strongest? (a) design C (b) design A (c) design B
9. 9.🧪 A paper bridge was tested three times. It held 380 g, 280 g and 180 g. What is the mean (average) load it held, in grams?
10. 10.🔺 A flat frame has 4 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
11. 11.💪 A bag has a mass of 42 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
12. 12.🔍 Which is the odd one out? (a) stacking loose bricks (b) adding steel to concrete (c) using flexible joints (d) adding cross bracing
13. 13.🏚️ Does leaving out steel bars make a building safer or less safe in an earthquake? (a) less safe (b) safer in earthquakes
14. 14.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
15. 15.🏚️ Does adding cross bracing make a building safer or less safe in an earthquake? (a) less safe (b) safer in earthquakes
16. 16.📋 For a model bridge challenge, is “use only paper and tape” a constraint or a criterion? (a) a constraint (b) a criterion
17. 17.🔧 Which tool would you use to measure a long length? (a) a spirit level (b) a hammer (c) a tape measure (d) pliers
18. 18.🔺 Which strong shape does an old stone bridge use? (a) dome (b) triangle (c) arch (d) beam
19. 19.📋 Criterion: the model bridge must hold at least 900 g. In the test it held 1050 g. Does it meet the criterion? (a) No (b) Yes
20. 20.📐 On a plan, 1 cm stands for 20 m. A wall is 8 cm long on the plan. How long is the real wall, in metres?
21. 21.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 2 (c) class 1
22. 22.📋 For a model bridge challenge, is “keep ice for 1 hour” a constraint or a criterion? (a) a constraint (b) a criterion
23. 23.Which of these is in tension (pulled)? (a) a bridge pier (b) a squeezed spring (c) a swing chain (d) a pillar under a roof
24. 24.🔍 Which is the odd one out? (a) a temple column (b) a table leg (c) a stone in an arch (d) a tug of war rope
25. 25.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
26. 26.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) use a smaller force (c) stop all friction (d) make new energy
27. 27.True or false: pulling a cart is a pull. (a) False (b) True
28. 28.📐 On a plan, 1 cm stands for 10 m. A real bridge is 100 m long. How long is it on the plan, in centimetres?
29. 29.📋 For a model bridge challenge, is “finish in 40 minutes” a constraint or a criterion? (a) a constraint (b) a criterion
30. 30.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
31. 31.True or false: an electrical engineer wires a new building. (a) False (b) True
32. 32.True or false: “fit on a school desk” is a criterion (a goal). (a) False (b) True
33. 33.🌉 What holds up a long beam bridge in the middle? (a) cables only (b) balloons (c) nothing (d) piers
34. 34.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
35. 35.🏚️ Three solid model towers are made of the same material. Tower A is 50 cm tall on a 10 cm wide base, tower B is 90 cm tall on a 30 cm base and tower C is 160 cm tall on a 40 cm base. Which is the easiest to tip over? (a) tower A (b) tower B (c) tower C
36. 36.🔧 Which tool would you use to drive in a nail? (a) a saw (b) a hammer (c) a tape measure (d) sandpaper
37. 37.True or false: a movable pulley stays in one place. (a) True (b) False
38. 38.🌉 A beam bridge 110 m long is split by piers into 11 equal spans. How long is each span, in metres?
39. 39.🔍 Which is the odd one out? (a) be under 30 cm tall (b) use at most 20 straws (c) spend at most ₹100 (d) float for 1 minute
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 110 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3

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