Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 321 · 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.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the pulley (c) the load (d) the fulcrum
2. 2.🪝 A winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 400 N bucket on the axle, in newtons? (ideal)
3. 3.True or false: to repeat each test is good testing. (a) True (b) False
4. 4.Which job does a mechanical engineer do? (a) designs a flyover (b) designs school networks (c) designs car engines (d) designs knee implants
5. 5.True or false: to find the limits is the Imagine step. (a) False (b) True
6. 6.🤝 Is it good or poor teamwork to give kind feedback? (a) poor teamwork (b) good teamwork
7. 7.🧱 Which material is best for a cooking pot handle? (a) copper (b) aluminium (c) iron (d) wood or plastic
8. 8.📐 A beam is 380 cm long. How long is it in metres? =
9. 9.🪝 A bucket weighing 370 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
10. 10.Which of these makes a building safer in earthquakes? (a) leaving out steel bars (b) raising heavy tanks high (c) building tall and narrow (d) using flexible joints
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, a glass sheet 4 N, a wooden plank 8 N, a carpet 11 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
12. 12.Which of these uses a beam? (a) an igloo (b) a crane arm (c) a plank over a drain (d) a planetarium roof
13. 13.Which of these is caused by gravity? (a) rubbing hands warms them (b) a magnet picks up pins (c) rain falls to the ground (d) a compass needle turns
14. 14.💪 In a tug of war, one team pulls left with 45 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
15. 15.True or false: to ask who will use it is the Plan step. (a) True (b) False
16. 16.📐 On a plan, 1 cm stands for 20 m. A wall is 19 cm long on the plan. How long is the real wall, in metres?
17. 17.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) the load floats (d) more effort needed
18. 18.🌉 Which bridge type: “good for short gaps”? (a) arch bridge (b) suspension bridge (c) beam bridge
19. 19.🔢 To follow the engineering design process, what comes right after “Plan”? (a) Imagine (b) Ask (c) Improve (d) Create
20. 20.🔺 Which strong shape does a round palace roof use? (a) arch (b) triangle (c) beam (d) dome
21. 21.🪢 A sign weighing 760 N hangs from 4 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
22. 22.Which of these uses a dome? (a) an electric pylon (b) an old stone bridge (c) a crane arm (d) a planetarium roof
23. 23.⚖️ A seesaw balances. Kabir (? N) sits 3 m from the pivot on one side; Meena (540 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.True or false: a nutcracker is a lever. (a) True (b) False
25. 25.💪 Which force is at work: squeezing a lemon? (a) muscular force (b) gravity (c) magnetic force (d) friction
26. 26.True or false: a fixed pulley rises with the load. (a) False (b) True
27. 27.♻️ A sustainable design … (a) wastes water (b) lasts one day (c) uses the most plastic (d) protects the future
28. 28.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) the axle
29. 29.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 20 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.♻️ A project report has 58 pages. How many sheets of paper are needed if it is printed on both sides of each sheet?
31. 31.🔧 Which tool would you use to grip and bend wire? (a) a spanner (b) sandpaper (c) a hammer (d) pliers
32. 32.🤝 In a design team, who tracks what is used up? (a) builder (b) materials manager (c) team leader (d) tester
33. 33.🪢 A sign weighing 180 N hangs from 6 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
34. 34.📐 On a plan, 1 cm stands for 2 m. A wall is 16 cm long on the plan. How long is the real wall, in metres?
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 70 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
36. 36.Which job is a hammer for? (a) tighten a nut (b) smooth a rough edge (c) cut a wooden plank (d) drive in a nail
37. 37.📋 A constraint is … (a) a final test (b) a kind of glue (c) a limit you must keep to (d) a goal for success
38. 38.Which of these is a wheel and axle? (a) a window blind cord (b) a bottle opener (c) a round doorknob (d) a jar lid
39. 39.Which job does a civil engineer do? (a) designs a flyover (b) designs power lines (c) designs school networks (d) designs satellites
40. 40.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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