Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 875 · 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.🧪 Three prototype bridges were tested with the same method. Design A held 320 g, design B held 270 g and design C held 220 g. Which design was the weakest? (a) design A (b) design C (c) design B
2. 2.🏚️ Does adding cross bracing make a building safer or less safe in an earthquake? (a) safer in earthquakes (b) less safe
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 10 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
4. 4.🪝 A winch has a wheel of radius 24 cm and an axle of radius 4 cm. What effort on the wheel lifts a 180 N bucket on the axle, in newtons? (ideal)
5. 5.Which job does a mechanical engineer do? (a) designs factory machines (b) writes app software (c) runs a fertiliser plant (d) designs aeroplane wings
6. 6.🛠️ Is a waterfall made by engineers or found in nature? (a) made by engineers (b) found in nature
7. 7.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) press parts harder (c) make parts rough (d) add sand
8. 8.📐 How many centimetres are in 1 metre? (a) 1000 (b) 100 (c) 10 (d) 60
9. 9.Which of these makes a building less safe in earthquakes? (a) keeping a simple shape (b) adding cross bracing (c) having a wide base (d) leaving out steel bars
10. 10.🔍 Which is the odd one out? (a) a door stopper (b) the tip of a nail (c) a window blind cord (d) an axe blade
11. 11.🔺 Which strong shape does a shelf on two brackets use? (a) dome (b) arch (c) triangle (d) beam
12. 12.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
13. 13.Which of these is a suspension bridge? (a) a flat deck on piers (b) pushes out on its ends (c) good for short gaps (d) a rope bridge in hills
14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a wooden plank 4 N, a carpet 7 N. How many newtons more were needed on sandpaper than on ice?
16. 16.📋 For a model bridge challenge, is “keep ice for 1 hour” a constraint or a criterion? (a) a constraint (b) a criterion
17. 17.Which job is a spirit level for? (a) cut a wooden plank (b) tighten a nut (c) smooth a rough edge (d) check a shelf is level
18. 18.🔺 One side of a straw bridge is a row of 14 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
19. 19.🔺 One side of a straw bridge is a row of 15 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
20. 20.🔺 A beam bends under a load. Its top side is … (a) stretched (tension) (b) not affected (c) squeezed (compression) (d) floating
21. 21.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a well-bucket rope wheel (c) a bottle cap (d) a window blind cord
22. 22.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 12 (c) 10 (d) 3
23. 23.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
24. 24.Which of these needs a heat insulator? (a) a cooking pot handle (b) an umbrella cover (c) a water tank (d) a switch contact
25. 25.🔢 To follow the engineering design process, which comes first: “Imagine” or “Improve”? (a) Improve (b) Imagine
26. 26.🧪 The first prototype held 260 g. After the team improved it, the new prototype held 400 g. How many more grams did it hold?
27. 27.Which of these is a lever? (a) a round doorknob (b) a bottle cap (c) a bottle opener (d) a wood screw
28. 28.🛠️ Is a bridge made by engineers or found in nature? (a) made by engineers (b) found in nature
29. 29.🪝 A bucket weighing 360 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.💪 Two children push a box to the right, one with 25 N and the other with 65 N. What is the net (total) force on the box, in newtons?
31. 31.🌉 Which bridge type can cross the widest gap in one span? (a) suspension bridge (b) arch bridge (c) beam bridge (d) log bridge
32. 32.📐 On a plan, 1 cm stands for 2 m. A wall is 13 cm long on the plan. How long is the real wall, in metres?
33. 33.🧪 Is it good or poor testing to use the same load? (a) good testing (b) poor testing
34. 34.🤝 In a design team, who collects the supplies? (a) tester (b) builder (c) recorder (d) materials manager
35. 35.🔍 Which is the odd one out? (a) use only paper and tape (b) be under 30 cm tall (c) spend at most ₹100 (d) hold up 500 g
36. 36.🧪 The first prototype held 70 g. After the team improved it, the new prototype held 230 g. How many more grams did it hold?
37. 37.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a wheel on ball bearings (d) powder on a carrom board
38. 38.Which of these happens in the Create step? (a) build the model (b) dream up possible fixes (c) try it out (d) draw a labelled diagram
39. 39.⚖️ A seesaw balances. Kabir (200 N) sits 4 m from the pivot on one side; Meena (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.Which of these is in tension (pulled)? (a) a stone in an arch (b) a temple column (c) a suspension cable (d) a brick at a wall base

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