Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 544 · 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.True or false: an aerospace engineer designs a paint factory. (a) True (b) False
2. 2.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the fulcrum (c) the effort (d) the load
3. 3.⚖️ What is the pivot point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
4. 4.🛠️ Is a water filter made by engineers or found in nature? (a) made by engineers (b) found in nature
5. 5.True or false: to measure its performance is the Test step. (a) False (b) True
6. 6.📋 Constraint: the tower must be no taller than 70 cm. The team’s tower is 68 cm tall. Is it within the constraint? (a) No (b) Yes
7. 7.🔺 Why can an arch carry heavy loads? (a) it bends easily (b) it is very light (c) it is hollow (d) it works in compression
8. 8.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
9. 9.🏚️ Three solid model towers are made of the same material. Tower A is 80 cm tall on a 40 cm wide base, tower B is 40 cm tall on a 10 cm base and tower C is 30 cm tall on a 10 cm base. Which is the easiest to tip over? (a) tower B (b) tower C (c) tower A
10. 10.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
11. 11.🧑‍🔧 Which kind of engineer keeps data safe online? (a) civil (b) computer (c) electrical (d) mechanical
12. 12.⚖️ A lever bar balances. The load is 810 N at 10 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?
13. 13.Which of these uses triangles? (a) a slab over a canal (b) an old stone bridge (c) a lintel over a door (d) an electric pylon
14. 14.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) mass of fulcrum (d) distance from fulcrum
15. 15.🧪 Is it good or poor testing to test it only once? (a) good testing (b) poor testing
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
17. 17.True or false: a rough doormat gives more friction. (a) False (b) True
18. 18.True or false: to hide a mistake is poor teamwork. (a) False (b) True
19. 19.🔢 To build and test a straw bridge, what comes right after “load it with coins”? (a) strengthen the weak part (b) read the challenge rules (c) build it with straws (d) choose and draw one
20. 20.📐 How many millimetres are in 1 centimetre? (a) 10 (b) 5 (c) 100 (d) 1000
21. 21.🏚️ Does fitting rubber base pads make a building safer or less safe in an earthquake? (a) safer in earthquakes (b) less safe
22. 22.True or false: to leave tools on the floor is not safe. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) dry wood (b) steel (c) copper (d) graphite
24. 24.🪝 A bucket weighing 110 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
25. 25.🔍 Which is the odd one out? (a) lift a cup of water (b) spend at most ₹100 (c) keep ice for 1 hour (d) stand in a fan breeze
26. 26.📐 Why do engineers use scale drawings? (a) to make them pretty (b) big things fit on paper (c) to save ink only (d) to hide sizes
27. 27.🪢 A sign weighing 480 N hangs from 3 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
29. 29.📋 Constraint: the tower must be no taller than 50 cm. The team’s tower is 54 cm tall. Is it within the constraint? (a) No (b) Yes
30. 30.🧪 The first prototype held 60 g. After the team improved it, the new prototype held 230 g. How many more grams did it hold?
31. 31.📐 On a plan, 1 cm stands for 2 m. A real bridge is 18 m long. How long is it on the plan, in centimetres?
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
33. 33.🔍 Which is the odd one out? (a) brass (b) rubber (c) glass (d) plastic
34. 34.📐 A model car is drawn so that 1 cm stands for 30 cm. The car is 3 cm long in the drawing. How long is the real car, in centimetres?
35. 35.🔺 Which strong shape does a plank over a drain use? (a) arch (b) triangle (c) dome (d) beam
36. 36.🧱 Which material is best for a window pane? (a) glass (b) wood (c) steel (d) brick
37. 37.True or false: a computer engineer builds a website. (a) False (b) True
38. 38.🧱 Which property matters most for a tea flask lining? (a) transparent (b) electrical conductor (c) heat insulator (d) flexible
39. 39.Which of these makes a building safer in earthquakes? (a) making brittle joints (b) building tall and narrow (c) using flexible joints (d) stacking loose bricks
40. 40.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?

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