Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 280 · 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.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) oil the moving parts (d) add sand
2. 2.🧑‍🔧 Which branch of engineering designs buildings, roads and bridges? (a) chemical (b) biomedical (c) computer (d) civil
3. 3.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Asha (200 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.📐 On a plan, 1 cm stands for 2 m. A wall is 10 cm long on the plan. How long is the real wall, in metres?
5. 5.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
6. 6.📋 For a model bridge challenge, is “carry 10 coins” a constraint or a criterion? (a) a criterion (b) a constraint
7. 7.🧱 Which material is best for the core of an electric wire? (a) wood (b) copper (c) rubber (d) glass
8. 8.💪 A bag has a mass of 18 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
9. 9.📐 On a plan, 1 cm stands for 10 m. A real bridge is 40 m long. How long is it on the plan, in centimetres?
10. 10.Which of these needs a transparent material? (a) a cooking pot handle (b) a car seat belt (c) an oven glove (d) a magnifier lens
11. 11.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
12. 12.Which of these is reduce (use less)? (a) reuse gift paper (b) buy less packaging (c) melt cans into new cans (d) melt glass into new jars
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a wooden plank
14. 14.True or false: “carry 10 coins” is a constraint (a limit). (a) False (b) True
15. 15.True or false: pushing a swing is a push. (a) False (b) True
16. 16.🛠️ What does an engineer do before building anything? (a) paints the model (b) understands the problem (c) buys every material (d) builds at once
17. 17.🧱 Which material is best for the bars inside concrete? (a) rubber (b) glass (c) steel (d) plastic
18. 18.🪢 Tension is a force that … (a) pulls or stretches (b) pushes or squeezes (c) turns things (d) heats things
19. 19.📐 How many millimetres are in 1 centimetre? (a) 1000 (b) 10 (c) 100 (d) 5
20. 20.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the axle (d) the effort
21. 21.🪢 A sign weighing 100 N hangs from 2 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
22. 22.🌉 Which bridge type can cross the widest gap in one span? (a) arch bridge (b) suspension bridge (c) beam bridge (d) log bridge
23. 23.⚖️ A lever bar balances. The load is 490 N at 10 cm from the fulcrum. The effort is 70 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
25. 25.Which of these makes a building safer in earthquakes? (a) building tall and narrow (b) making brittle joints (c) raising heavy tanks high (d) adding cross bracing
26. 26.📐 A beam is 340 cm long. How long is it in metres? =
27. 27.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
28. 28.🌉 Which bridge type: “a flat deck on piers”? (a) beam bridge (b) arch bridge (c) suspension bridge
29. 29.True or false: to use a cracked tool is safe. (a) True (b) False
30. 30.📐 On a plan, 1 cm stands for 5 m. A real bridge is 60 m long. How long is it on the plan, in centimetres?
31. 31.🌉 Which bridge type: “the simplest bridge”? (a) arch bridge (b) suspension bridge (c) beam bridge
32. 32.True or false: a lift helps people reach a top floor fast. (a) False (b) True
33. 33.💪 A force is a … (a) push or a pull (b) kind of colour (c) unit of time (d) type of sound
34. 34.Which of these is recycle (make new things)? (a) pulp old paper (b) switch off unused lights (c) use a jar as a pen stand (d) give old books away
35. 35.Which of these needs a waterproof material? (a) a plug pin (b) a car seat belt (c) an umbrella cover (d) a car windscreen
36. 36.Which of these is caused by gravity? (a) a rolling ball slows (b) shoes grip the floor (c) lifting a school bag (d) an apple falls down
37. 37.🔄 After testing, a design does not work well. What comes next? (a) Ask (b) give up (c) Improve (d) Imagine
38. 38.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
39. 39.Which of these happens in the Ask step? (a) find the limits (b) dream up possible fixes (c) measure its performance (d) redesign after testing
40. 40.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a ramp wrapped round (d) a bent lever

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