Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 349 · 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 school bench is made from 200 recycled plastic bottles. How many benches can be made from 1800 bottles?
2. 2.🔺 One side of a straw bridge is a row of 7 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
3. 3.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🔄 Which design-process step is it to brainstorm many ideas? (a) Create (b) Ask (c) Imagine (d) Test
5. 5.Which of these is reduce (use less)? (a) carry a cloth bag (b) melt glass into new jars (c) plant in old tyres (d) give old books away
6. 6.📐 On a plan, 1 cm stands for 2 m. A real bridge is 22 m long. How long is it on the plan, in centimetres?
7. 7.📐 A beam is 720 cm long. How long is it in metres? =
8. 8.What does the tester do? (a) puts the model together (b) runs the tests (c) shares out the jobs (d) keeps the design notes
9. 9.♻️ Reduce, reuse or recycle: switch off unused lights? (a) reuse (b) reduce (c) recycle
10. 10.📋 For a model bridge challenge, is “use at most 20 straws” a constraint or a criterion? (a) a constraint (b) a criterion
11. 11.⚖️ A lever bar balances. The load is 180 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?
12. 12.True or false: plucking a mango is a push. (a) False (b) True
13. 13.🔺 One side of a straw bridge is a row of 5 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
14. 14.Which of these is reuse (use again)? (a) plant in old tyres (b) melt glass into new jars (c) carry a cloth bag (d) pulp old paper
15. 15.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
16. 16.True or false: a smooth steel slide gives less friction. (a) False (b) True
17. 17.📐 On a plan, 1 cm stands for 10 m. A wall is 8 cm long on the plan. How long is the real wall, in metres?
18. 18.True or false: a lift helps people cross a wide river. (a) True (b) False
19. 19.🌉 Which bridge type: “a curve under the deck”? (a) suspension bridge (b) beam bridge (c) arch bridge
20. 20.True or false: a rainbow is found in nature. (a) True (b) False
21. 21.Which of these needs a heat insulator? (a) a car seat belt (b) a tea flask lining (c) a water tank (d) a plug pin
22. 22.🔍 Which is the odd one out? (a) raising heavy tanks high (b) stacking loose bricks (c) adding steel to concrete (d) leaving out steel bars
23. 23.🪢 Tension or compression: a squeezed spring? (a) tension (b) compression
24. 24.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the direction of pull (c) the size of the load (d) gravity
25. 25.⚖️ A lever bar balances. The load is 200 N at ? cm from the fulcrum. The effort is 400 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.⚖️ A seesaw balances. Asha (300 N) sits 1 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.True or false: a biomedical engineer designs power lines. (a) False (b) True
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 2 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
29. 29.⚖️ A seesaw balances. Meena (170 N) sits 1 m from the pivot on one side; Zoya (170 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
30. 30.True or false: a coral reef is found in nature. (a) True (b) False
31. 31.⚙️ Which simple machine is a jar lid? (a) wheel and axle (b) wedge (c) screw (d) pulley
32. 32.True or false: a steering wheel is a screw. (a) False (b) True
33. 33.📐 A model car is drawn so that 1 cm stands for 10 cm. The car is 3 cm long in the drawing. How long is the real car, in centimetres?
34. 34.🏚️ 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
35. 35.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
36. 36.💪 Which force is at work: a river flows downhill? (a) friction (b) muscular force (c) magnetic force (d) gravity
37. 37.📐 On a plan, 1 cm stands for 5 m. A wall is 8 cm long on the plan. How long is the real wall, in metres?
38. 38.🔍 Which is the odd one out? (a) a stretched rubber band (b) a crane lifting cable (c) a tow rope on a car (d) a stone in an arch
39. 39.🔢 To follow the engineering design process, which comes first: “Imagine” or “Plan”? (a) Imagine (b) Plan
40. 40.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a box pushed on carpet (d) powder on a carrom board

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