Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 179 · 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 cart is pulled to the right with 95 N and to the left with 80 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
2. 2.🔍 Which is the odd one out? (a) keep ice for 1 hour (b) hold up 500 g (c) fit on a school desk (d) carry 10 coins
3. 3.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
4. 4.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
5. 5.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
6. 6.Which job does a mechanical engineer do? (a) lays out a highway (b) designs artificial limbs (c) designs car engines (d) designs a metro tunnel
7. 7.True or false: a mechanical engineer designs car engines. (a) False (b) True
8. 8.True or false: a civil engineer designs a metro tunnel. (a) False (b) True
9. 9.🔄 Which design-process step is it to define the problem? (a) Imagine (b) Create (c) Plan (d) Ask
10. 10.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
11. 11.🔄 Which design-process step is it to fix the weak part? (a) Plan (b) Create (c) Test (d) Improve
12. 12.📐 How many millimetres are in 1 centimetre? (a) 5 (b) 1000 (c) 10 (d) 100
13. 13.🔢 To follow the engineering design process, which comes first: “Improve” or “Ask”? (a) Ask (b) Improve
14. 14.True or false: a computer engineer designs hearing aids. (a) True (b) False
15. 15.True or false: to redesign after testing is the Improve step. (a) True (b) False
16. 16.🔄 In which step do engineers draw a labelled diagram? (a) Ask (b) Plan (c) Test (d) Improve
17. 17.📋 Criterion: the model bridge must hold at least 400 g. In the test it held 250 g. Does it meet the criterion? (a) No (b) Yes
18. 18.🛞 Rubbing your hands fast makes them … (a) magnetic (b) cold (c) warm (d) wet
19. 19.🧪 A paper bridge was tested three times. It held 240 g, 150 g and 240 g. What is the mean (average) load it held, in grams?
20. 20.🤝 Is it good or poor teamwork to do all the work alone? (a) good teamwork (b) poor teamwork
21. 21.⚖️ A lever bar balances. The load is 420 N at 20 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.📐 On a plan, 1 cm stands for 5 m. A real bridge is 10 m long. How long is it on the plan, in centimetres?
23. 23.🧪 The first prototype held 250 g. After the team improved it, the new prototype held 390 g. How many more grams did it hold?
24. 24.True or false: a movable pulley needs effort = load. (a) True (b) False
25. 25.📋 For a model bridge challenge, is “roll at least 2 metres” a constraint or a criterion? (a) a constraint (b) a criterion
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
27. 27.True or false: a chemical engineer designs knee implants. (a) False (b) True
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
29. 29.Which of these is a suspension bridge? (a) cables tied down at ends (b) a log across a stream (c) a curve under the deck (d) pushes out on its ends
30. 30.🦺 In the workshop, is it safe to leave tools on the floor? (a) not safe (b) safe
31. 31.Which of these is an arch bridge? (a) a rope bridge in hills (b) pushes out on its ends (c) cables tied down at ends (d) good for short gaps
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, a carpet 8 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
33. 33.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
34. 34.⚖️ A lever bar balances. The load is 450 N at ? cm from the fulcrum. The effort is 90 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.Which of these is a lever? (a) a wheelchair ramp (b) a nutcracker (c) a steering wheel (d) a well-bucket rope wheel
36. 36.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 2 (c) class 3
37. 37.⚖️ A lever bar balances. The load is 280 N at 50 cm from the fulcrum. The effort is 350 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🌉 A beam bridge 80 m long rests on the two river banks and on piers in between, making equal spans of 40 m. How many piers are there?
39. 39.📋 Criterion: the model bridge must hold at least 300 g. In the test it held 250 g. Does it meet the criterion? (a) Yes (b) No
40. 40.Which of these needs a flexible material? (a) a skipping rope (b) a cooking pot handle (c) an umbrella cover (d) an oven glove

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