Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 555 · 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.🛠️ People need to keep food fresh longer. Which invention helps? (a) a fridge (b) a telephone (c) a bridge (d) a dam
2. 2.⚖️ A lever bar balances. The load is 160 N at 10 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.True or false: sunlight is a non-renewable energy source. (a) True (b) False
4. 4.Which of these makes a building safer in earthquakes? (a) making brittle joints (b) using a light roof (c) using a heavy roof (d) raising heavy tanks high
5. 5.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
6. 6.🧪 A paper bridge was tested three times. It held 290 g, 190 g and 90 g. What is the mean (average) load it held, in grams?
7. 7.🔍 Which is the odd one out? (a) measure the same way (b) use the same load (c) skip writing results (d) change only one thing
8. 8.🤝 A team of 2 shares 10 equal jobs fairly. Each job takes 3 minutes. How many minutes does each person work?
9. 9.True or false: an aerospace engineer plans a space mission. (a) True (b) False
10. 10.🧪 The first prototype held 50 g. After the team improved it, the new prototype held 150 g. How many more grams did it hold?
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
12. 12.📋 Criteria are … (a) the limits on money (b) the tools you use (c) the team names (d) goals a design must meet
13. 13.🧱 Which material is best for a cooking pot handle? (a) iron (b) copper (c) aluminium (d) wood or plastic
14. 14.🔺 Which strong shape does a bicycle frame use? (a) arch (b) beam (c) dome (d) triangle
15. 15.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
16. 16.🔺 Which strong shape does a plank over a drain use? (a) triangle (b) dome (c) beam (d) arch
17. 17.True or false: a computer engineer plans a space mission. (a) True (b) False
18. 18.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
19. 19.Which of these happens in the Test step? (a) list the materials (b) measure its performance (c) ask who will use it (d) build the model
20. 20.🧱 Is rubber an electrical conductor or an insulator? (a) an insulator (b) a conductor
21. 21.True or false: plucking a mango is a pull. (a) True (b) False
22. 22.True or false: chalk on a gym bar gives more friction. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) tie back long hair (b) use a cracked tool (c) leave tools on the floor (d) cut towards your hand
24. 24.Which of these uses a beam? (a) a lintel over a door (b) a fort gateway (c) an old stone bridge (d) a truss bridge side
25. 25.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “build it with straws”? (a) build it with straws (b) strengthen the weak part
26. 26.Which of these is reduce (use less)? (a) use a jar as a pen stand (b) refill a water bottle (c) melt cans into new cans (d) carry a cloth bag
27. 27.💪 In a tug of war, one team pulls left with 10 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
28. 28.🤝 In a design team, who keeps the design notes? (a) materials manager (b) recorder (c) tester (d) builder
29. 29.⚖️ A lever bar balances. The load is 240 N at ? cm from the fulcrum. The effort is 90 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 1 (c) class 2
31. 31.📋 For a model bridge challenge, is “spend at most ₹100” a constraint or a criterion? (a) a constraint (b) a criterion
32. 32.🔍 Which is the odd one out? (a) a stretched rubber band (b) a tow rope on a car (c) a bridge pier (d) a suspension cable
33. 33.⚖️ A seesaw balances. Zoya (360 N) sits 1 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
34. 34.True or false: a civil engineer builds rockets. (a) False (b) True
35. 35.True or false: a raincoat needs a flexible material. (a) False (b) True
36. 36.Which of these is in tension (pulled)? (a) a brick at a wall base (b) a stretched rubber band (c) a table leg (d) a pillar under a roof
37. 37.Which need does a solar panel meet? (a) keep food fresh longer (b) make power from sunlight (c) go through a mountain (d) see very tiny things
38. 38.♻️ Is diesel a renewable or a non-renewable energy source? (a) non-renewable (b) renewable
39. 39.🛠️ People need to see very tiny things. Which invention helps? (a) a dam (b) a train (c) a microscope (d) a solar panel
40. 40.💪 Two children push a box to the right, one with 45 N and the other with 30 N. What is the net (total) force on the box, in newtons?

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