Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 859 · 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.🔍 Which is the odd one out? (a) a river (b) a cloud (c) a mobile phone (d) a mountain
2. 2.💪 Two children push a box to the right, one with 20 N and the other with 95 N. What is the net (total) force on the box, in newtons?
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
4. 4.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
5. 5.⚖️ A lever bar balances. The load is 800 N at 20 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
6. 6.What does the tester do? (a) writes down results (b) cuts and joins parts (c) runs the tests (d) shares out the jobs
7. 7.🧑‍🔧 Which kind of engineer designs bicycle gears? (a) computer (b) mechanical (c) chemical (d) aerospace
8. 8.🌉 Which bridge type: “a log across a stream”? (a) suspension bridge (b) arch bridge (c) beam bridge
9. 9.📐 A model car is drawn so that 1 cm stands for 30 cm. The car is 10 cm long in the drawing. How long is the real car, in centimetres?
10. 10.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
11. 11.📐 Why do engineers use scale drawings? (a) big things fit on paper (b) to save ink only (c) to make them pretty (d) to hide sizes
12. 12.🛠️ What does an engineer mainly do? (a) only paints pictures (b) designs useful solutions (c) sells tickets (d) grows crops
13. 13.Which of these uses an arch? (a) a roof truss (b) a lintel over a door (c) a planetarium roof (d) a curved stone doorway
14. 14.📋 For a model bridge challenge, is “fit on a school desk” a constraint or a criterion? (a) a criterion (b) a constraint
15. 15.Which of these is recycle (make new things)? (a) buy less packaging (b) melt cans into new cans (c) give old books away (d) print on both sides
16. 16.Which of these happens in the Imagine step? (a) follow the plan to build (b) draw a labelled diagram (c) measure its performance (d) think of wild ideas
17. 17.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.🪢 A sign weighing 440 N hangs from 4 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
19. 19.True or false: to change lots at once is good testing. (a) True (b) False
20. 20.🦺 In the workshop, is it safe to run while holding tools? (a) not safe (b) safe
21. 21.True or false: to drive in a nail, use a hammer. (a) True (b) False
22. 22.📋 For a model bridge challenge, is “float for 1 minute” a constraint or a criterion? (a) a criterion (b) a constraint
23. 23.🔍 Which is the odd one out? (a) float for 1 minute (b) use only paper and tape (c) finish in 40 minutes (d) spend at most ₹100
24. 24.🤝 A team plans for 15 minutes, builds for 55 minutes and then tests for 20 minutes, one after another. How many minutes is that in all?
25. 25.🛠️ People need to see very tiny things. Which invention helps? (a) a dam (b) a lift (c) a microscope (d) a bridge
26. 26.Which of these is a beam bridge? (a) stones squeezed together (b) a rope bridge in hills (c) a log across a stream (d) deck hangs from cables
27. 27.🔍 Which is the odd one out? (a) keep ice for 1 hour (b) spend at most ₹100 (c) use at most 20 straws (d) fit on a school desk
28. 28.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 2 (c) class 1
29. 29.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “build it with straws”? (a) strengthen the weak part (b) build it with straws
30. 30.📐 On a plan, 1 cm stands for 20 m. A wall is 20 cm long on the plan. How long is the real wall, in metres?
31. 31.True or false: to share the work fairly is poor teamwork. (a) True (b) False
32. 32.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 1 (c) class 2
33. 33.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
34. 34.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
35. 35.True or false: a nut and bolt is a wedge. (a) False (b) True
36. 36.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) the load floats (d) less effort needed
37. 37.Which of these is caused by friction? (a) a fridge magnet sticks (b) shoes grip the floor (c) a river flows downhill (d) a thrown ball comes down
38. 38.⚖️ A seesaw balances. Ravi (180 N) sits ? m from the pivot on one side; Arjun (180 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
39. 39.True or false: skating on ice gives less friction. (a) True (b) False
40. 40.True or false: an aerospace engineer builds hospital scanners. (a) False (b) True

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