Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 671 · 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 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🔺 A flat frame has 8 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
3. 3.🛠️ What does an engineer mainly do? (a) only paints pictures (b) sells tickets (c) grows crops (d) designs useful solutions
4. 4.🏚️ Why is a wide base safer? (a) it is colourful (b) it is taller (c) it is lighter (d) it is harder to tip over
5. 5.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Meena (190 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.📐 On a plan, 1 cm stands for 2 m. A wall is 19 cm long on the plan. How long is the real wall, in metres?
7. 7.⚖️ A seesaw balances. Kabir (400 N) sits 3 m from the pivot on one side; Zoya (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.🔄 Which design-process step is it to pick the build order? (a) Imagine (b) Create (c) Improve (d) Plan
9. 9.🔍 Which is the odd one out? (a) a bridge (b) a cloud (c) a ceiling fan (d) a dam
10. 10.Which of these needs an electrical conductor? (a) the core of a wire (b) a roof sheet (c) a yoga mat (d) a skipping rope
11. 11.Which of these is a pulley? (a) a seesaw (b) a well-bucket rope wheel (c) a wood screw (d) a chisel
12. 12.♻️ A project report has 100 pages. How many sheets of paper are needed if it is printed on both sides of each sheet?
13. 13.🔺 A flat frame has 10 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
14. 14.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
15. 15.True or false: “a curve under the deck” is a suspension bridge. (a) True (b) False
16. 16.🧑‍🔧 Which branch of engineering uses engineering to help doctors? (a) aerospace (b) electrical (c) biomedical (d) civil
17. 17.⚖️ A seesaw balances. Kabir (680 N) sits 4 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.🧪 Is it good or poor testing to change only one thing? (a) good testing (b) poor testing
19. 19.Which of these needs a waterproof material? (a) a tea flask lining (b) the core of a wire (c) a hair band (d) an umbrella cover
20. 20.🔧 Which tool would you use to measure a long length? (a) a screwdriver (b) a spirit level (c) a tape measure (d) a saw
21. 21.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
23. 23.🔍 Which is the odd one out? (a) a stone in an arch (b) a swing chain (c) a bridge pier (d) a pillar under a roof
24. 24.📋 Criterion: the model bridge must hold at least 600 g. In the test it held 700 g. Does it meet the criterion? (a) No (b) Yes
25. 25.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 380 g. How many more grams did it hold?
26. 26.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
27. 27.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
28. 28.🧑‍🔧 Which kind of engineer wires a new building? (a) biomedical (b) electrical (c) computer (d) civil
29. 29.🔍 Which is the odd one out? (a) using flexible joints (b) fitting rubber base pads (c) building tall and narrow (d) adding cross bracing
30. 30.💪 In a tug of war, one team pulls right with 50 N and the other pulls left with 25 N. What is the size of the net force, in newtons?
31. 31.📋 For a model bridge challenge, is “use at most 20 straws” a constraint or a criterion? (a) a criterion (b) a constraint
32. 32.🦺 Who should use hot glue guns and power tools in a kids’ project? (a) a stranger (b) the youngest child (c) any child alone (d) an adult
33. 33.🔍 Which is the odd one out? (a) leaving out steel bars (b) building tall and narrow (c) having a wide base (d) stacking loose bricks
34. 34.🪢 Tension or compression: a stretched rubber band? (a) compression (b) tension
35. 35.⚖️ A seesaw balances. Asha (200 N) sits 4 m from the pivot on one side; Kabir (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
37. 37.🪢 Tension or compression: a stone in an arch? (a) tension (b) compression
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 6 N, a carpet 9 N, sandpaper 11 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
39. 39.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1
40. 40.💪 Which force is at work: rubbing hands warms them? (a) muscular force (b) friction (c) magnetic force (d) gravity

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