Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 948 · 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.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
2. 2.⚖️ A lever bar balances. The load is 40 N at ? cm from the fulcrum. The effort is 30 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
3. 3.📋 Constraint: the tower must be no taller than 90 cm. The team’s tower is 90 cm tall. Is it within the constraint? (a) No (b) Yes
4. 4.Which of these is caused by magnetic force? (a) brakes stop a bicycle (b) shoes grip the floor (c) lifting a school bag (d) a compass needle turns
5. 5.Which of these is reuse (use again)? (a) plant in old tyres (b) switch off unused lights (c) melt glass into new jars (d) buy less packaging
6. 6.🧑‍🔧 Which branch of engineering uses engineering to help doctors? (a) biomedical (b) aerospace (c) electrical (d) civil
7. 7.True or false: a computer engineer keeps data safe online. (a) False (b) True
8. 8.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
9. 9.♻️ A sustainable design … (a) lasts one day (b) wastes water (c) uses the most plastic (d) protects the future
10. 10.📐 A model car is drawn so that 1 cm stands for 20 cm. The car is 9 cm long in the drawing. How long is the real car, in centimetres?
11. 11.🏚️ Where should heavy water tanks go in a quake zone? (a) on a thin pole (b) on the very top (c) hanging outside (d) low down
12. 12.Which job is pliers for? (a) make a hole in wood (b) smooth a rough edge (c) grip and bend wire (d) cut a wooden plank
13. 13.🔄 Which design-process step is it to try it out? (a) Imagine (b) Test (c) Ask (d) Create
14. 14.📋 Your team’s budget is ₹40. You must buy one roll of tape for ₹20. Straws cost ₹2 each. What is the greatest number of straws you can buy?
15. 15.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) two ramps back to back (d) a wheel on a rod
16. 16.Which of these is an arch bridge? (a) stones squeezed together (b) a flat deck on piers (c) tall towers hold cables (d) a log across a stream
17. 17.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) oil the moving parts (d) add sand
18. 18.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
19. 19.🔍 Which is the odd one out? (a) a banyan tree (b) a rainbow (c) a dam (d) a waterfall
20. 20.🤝 In a design team, who shares out the jobs? (a) materials manager (b) team leader (c) tester (d) recorder
21. 21.📋 For a model bridge challenge, is “stand in a fan breeze” a constraint or a criterion? (a) a constraint (b) a criterion
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, sandpaper 11 N, ice 2 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
23. 23.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) unbalanced (d) gravity
24. 24.🧱 Is aluminium an electrical conductor or an insulator? (a) an insulator (b) a conductor
25. 25.True or false: fitting rubber base pads makes a building safer in earthquakes. (a) True (b) False
26. 26.Which of these is a screw? (a) a nut and bolt (b) a nutcracker (c) a door stopper (d) a claw hammer on a nail
27. 27.🧱 Which material is best for a window pane? (a) glass (b) wood (c) steel (d) brick
28. 28.💪 A box weighs 440 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
29. 29.🔍 Which is the odd one out? (a) steel (b) copper (c) glass (d) brass
30. 30.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
31. 31.True or false: closing a drawer is a push. (a) False (b) True
32. 32.📐 How many centimetres are in 1 metre? (a) 10 (b) 100 (c) 60 (d) 1000
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 10 N, a glass sheet 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
34. 34.🪝 A pulley system lifts a 480 N load with an effort of 160 N. What is its mechanical advantage (MA)?
35. 35.⚖️ A lever bar balances. The load is 180 N at ? cm from the fulcrum. The effort is 360 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 250 g and design C held 200 g. Which design was the weakest? (a) design C (b) design B (c) design A
37. 37.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1
38. 38.Which of these is reduce (use less)? (a) buy less packaging (b) pulp old paper (c) refill a water bottle (d) reuse gift paper
39. 39.📐 How many millimetres are in 1 centimetre? (a) 100 (b) 5 (c) 10 (d) 1000
40. 40.🔍 Which is the odd one out? (a) run while holding tools (b) play near a moving drill (c) carry scissors closed (d) leave tools on the floor

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