Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 612 · 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 seesaw balances. Ravi (180 N) sits 1 m from the pivot on one side; Arjun (180 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
2. 2.🤝 A team of 4 shares 12 equal jobs fairly. Each job takes 6 minutes. How many minutes does each person work?
3. 3.True or false: a bicycle frame uses triangles. (a) True (b) False
4. 4.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
5. 5.Which of these makes a building less safe in earthquakes? (a) keeping a simple shape (b) using flexible joints (c) fitting rubber base pads (d) leaving out steel bars
6. 6.🔍 Which is the odd one out? (a) aluminium (b) iron (c) rubber (d) steel
7. 7.Which of these is in compression (pushed)? (a) a bridge pier (b) a tug of war rope (c) a tow rope on a car (d) a hanging lamp chain
8. 8.🧪 What is a prototype? (a) a sales poster (b) the final product (c) a broken part (d) an early test model
9. 9.📋 For a model bridge challenge, is “spend at most ₹100” a constraint or a criterion? (a) a constraint (b) a criterion
10. 10.🛠️ What does an engineer mainly do? (a) designs useful solutions (b) grows crops (c) sells tickets (d) only paints pictures
11. 11.♻️ A family used to throw away 2 plastic bags a week. They now carry cloth bags. How many plastic bags do they save in 9 weeks?
12. 12.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 120 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
13. 13.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 1 (c) class 2
14. 14.Which of these needs an electrical conductor? (a) a skipping rope (b) an umbrella cover (c) a boat hull (d) a switch contact
15. 15.🪝 What does a single fixed pulley change? (a) gravity (b) the direction of pull (c) the size of the load (d) the colour of rope
16. 16.📐 On a plan, 1 cm stands for 10 m. A wall is 18 cm long on the plan. How long is the real wall, in metres?
17. 17.📐 A model car is drawn so that 1 cm stands for 10 cm. The car is 8 cm long in the drawing. How long is the real car, in centimetres?
18. 18.🧪 Is it good or poor testing to record every result? (a) poor testing (b) good testing
19. 19.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
20. 20.📋 For a model bridge challenge, is “roll at least 2 metres” a constraint or a criterion? (a) a criterion (b) a constraint
21. 21.🔧 Which tool would you use to tighten a nut? (a) a spanner (b) a screwdriver (c) a saw (d) sandpaper
22. 22.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) both weights are equal (d) turning effects match
23. 23.🔍 Which is the odd one out? (a) iron (b) graphite (c) brass (d) cotton cloth
24. 24.⚖️ A seesaw balances. Ravi (680 N) sits ? m from the pivot on one side; Kabir (170 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
25. 25.Which of these is a wedge? (a) a crowbar (b) a nutcracker (c) a door stopper (d) a flagpole rope wheel
26. 26.Which of these is made by engineers? (a) a satellite (b) a rainbow (c) a mountain (d) a coral reef
27. 27.Which of these is made by engineers? (a) a banyan tree (b) a volcano (c) a railway track (d) a mountain
28. 28.What does the team leader do? (a) keeps the team on track (b) keeps the design notes (c) tracks what is used up (d) collects the supplies
29. 29.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) the load floats (d) more effort needed
30. 30.🪢 A stage stands on 5 identical legs and each leg is squeezed with 250 N. What is the total load on the stage, in newtons?
31. 31.🔍 Which is the odd one out? (a) fit on a school desk (b) finish in 40 minutes (c) use only paper and tape (d) lift a cup of water
32. 32.🧱 Is rubber an electrical conductor or an insulator? (a) a conductor (b) an insulator
33. 33.Which of these happens in the Ask step? (a) define the problem (b) try it out (c) measure its performance (d) draw a labelled diagram
34. 34.📐 On a plan, 1 cm stands for 20 m. A real bridge is 80 m long. How long is it on the plan, in centimetres?
35. 35.🔍 Which is the odd one out? (a) roll at least 2 metres (b) float for 1 minute (c) use only paper and tape (d) carry 10 coins
36. 36.🪢 Tension or compression: a tug of war rope? (a) compression (b) tension
37. 37.True or false: a movable pulley is on a flagpole top. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a window blind cord (b) a well-bucket rope wheel (c) a nutcracker (d) a crane hook block
39. 39.🔺 A frame shaped like a hexagon is made of straws joined by loose pins, with 3 corner-to-corner braces. Is it rigid or wobbly? (a) wobbly (b) rigid
40. 40.🧱 Which material is best for a cooking pot handle? (a) aluminium (b) wood or plastic (c) copper (d) iron

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