Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 649 · 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.True or false: “stones squeezed together” is a beam bridge. (a) True (b) False
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 100 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
3. 3.Which of these is reuse (use again)? (a) buy less packaging (b) refill a water bottle (c) melt cans into new cans (d) pulp old paper
4. 4.🪢 Tension or compression: a tall bridge tower? (a) compression (b) tension
5. 5.🔺 Which strong shape does a planetarium roof use? (a) triangle (b) beam (c) dome (d) arch
6. 6.True or false: a bridge pier is in compression (pushed). (a) False (b) True
7. 7.🪝 A load of 40 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
8. 8.⚖️ A seesaw balances. Arjun (? N) sits 1 m from the pivot on one side; Kabir (150 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.📐 On a plan, 1 cm stands for 10 m. A wall is 10 cm long on the plan. How long is the real wall, in metres?
10. 10.📐 A model car is drawn so that 1 cm stands for 10 cm. The car is 14 cm long in the drawing. How long is the real car, in centimetres?
11. 11.🏚️ Three solid model towers are made of the same material. Tower A is 90 cm tall on a 30 cm wide base, tower B is 60 cm tall on a 30 cm base and tower C is 150 cm tall on a 30 cm base. Which is the easiest to tip over? (a) tower A (b) tower B (c) tower C
12. 12.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) gravity (d) the size of the load
13. 13.💪 Which force is at work: rubbing hands warms them? (a) muscular force (b) magnetic force (c) gravity (d) friction
14. 14.True or false: a civil engineer designs aeroplane wings. (a) False (b) True
15. 15.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 3 (c) class 2
16. 16.🌉 Which bridge type: “a curve under the deck”? (a) suspension bridge (b) beam bridge (c) arch bridge
17. 17.Which of these is a beam bridge? (a) a rope bridge in hills (b) a curve under the deck (c) the simplest bridge (d) cables tied down at ends
18. 18.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
19. 19.True or false: “spend at most ₹100” is a constraint (a limit). (a) False (b) True
20. 20.True or false: “a flat deck on piers” is a beam bridge. (a) False (b) True
21. 21.🔺 A beam bends under a load. Its top side is … (a) squeezed (compression) (b) not affected (c) stretched (tension) (d) floating
22. 22.📐 On a plan, 1 cm stands for 10 m. A wall is 3 cm long on the plan. How long is the real wall, in metres?
23. 23.🧱 Which material is best for a window pane? (a) steel (b) brick (c) glass (d) wood
24. 24.📐 A beam is 420 cm long. How long is it in metres? =
25. 25.Which need does a dam meet? (a) carry many people far (b) see very tiny things (c) cross a wide river (d) store water for summer
26. 26.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
27. 27.🏚️ Why is a wide base safer? (a) it is harder to tip over (b) it is lighter (c) it is colourful (d) it is taller
28. 28.⚙️ Which simple machine is a well winch handle? (a) wedge (b) wheel and axle (c) screw (d) inclined plane
29. 29.🧪 Why do engineers make prototypes? (a) to test ideas cheaply (b) to avoid testing (c) to sell them at once (d) to decorate a room
30. 30.🔄 After testing, a design does not work well. What comes next? (a) Improve (b) Ask (c) give up (d) Imagine
31. 31.⚙️ A wedge is … (a) a bar on a pivot (b) a wheel on a rod (c) two ramps back to back (d) a rope on a wheel
32. 32.🧱 Which property matters most for a car windscreen? (a) flexible (b) heat insulator (c) transparent (d) waterproof
33. 33.True or false: the core of a wire needs an electrical conductor. (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, sandpaper 5 N, ice 1 N, a glass sheet 2 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
35. 35.🛠️ Is a coral reef made by engineers or found in nature? (a) made by engineers (b) found in nature
36. 36.🔍 Which is the odd one out? (a) making brittle joints (b) fitting rubber base pads (c) keeping a simple shape (d) having a wide base
37. 37.🧱 Which material is best for a raincoat? (a) cardboard (b) paper (c) cotton wool (d) plastic-coated cloth
38. 38.🤝 Why do engineers work in teams? (a) many skills and ideas (b) to finish nothing (c) to argue more (d) to work alone
39. 39.💪 In a tug of war, one team pulls right with 30 N and the other pulls left with 25 N. What is the size of the net force, in newtons?
40. 40.📐 On a plan, 1 cm stands for 5 m. A real bridge is 95 m long. How long is it on the plan, in centimetres?

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