Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 445 · 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.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
3. 3.🦺 In the workshop, is it safe to tie back long hair? (a) not safe (b) safe
4. 4.Which of these is made by engineers? (a) a mountain (b) a coral reef (c) a ceiling fan (d) a volcano
5. 5.🧱 Which material is best for the core of an electric wire? (a) rubber (b) wood (c) copper (d) glass
6. 6.🪢 Tension or compression: a table leg? (a) compression (b) tension
7. 7.🔍 Which is the odd one out? (a) a dam (b) a volcano (c) a river (d) a seashell
8. 8.True or false: chalk on a gym bar gives more friction. (a) True (b) False
9. 9.Which need does a telephone meet? (a) see very tiny things (b) keep food fresh longer (c) cross a wide river (d) talk to someone far away
10. 10.📐 A model car is drawn so that 1 cm stands for 30 cm. The car is 14 cm long in the drawing. How long is the real car, in centimetres?
11. 11.True or false: a pair of tweezers is a class 3 lever (effort in the middle). (a) True (b) False
12. 12.♻️ Reduce, reuse or recycle: buy less packaging? (a) recycle (b) reduce (c) reuse
13. 13.🧱 Is steel an electrical conductor or an insulator? (a) a conductor (b) an insulator
14. 14.True or false: “finish in 40 minutes” is a criterion (a goal). (a) False (b) True
15. 15.📐 How many millimetres are in 1 centimetre? (a) 1000 (b) 100 (c) 10 (d) 5
16. 16.True or false: to try it out is the Imagine step. (a) False (b) True
17. 17.Which of these happens in the Ask step? (a) find the limits (b) measure its performance (c) draw a labelled diagram (d) make a prototype
18. 18.🧑‍🔧 Which branch of engineering uses engineering to help doctors? (a) aerospace (b) biomedical (c) civil (d) electrical
19. 19.🛠️ People need to see very tiny things. Which invention helps? (a) a microscope (b) a bridge (c) a lift (d) a telephone
20. 20.🧪 Three prototype bridges were tested with the same method. Design A held 180 g, design B held 230 g and design C held 280 g. Which design was the weakest? (a) design C (b) design B (c) design A
21. 21.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
22. 22.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the axle (c) the effort (d) the load
23. 23.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
24. 24.Which of these is a wedge? (a) a bottle opener (b) a road up a hill (c) a screw jack (d) an axe blade
25. 25.True or false: a satellite is found in nature. (a) True (b) False
26. 26.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) the pulley
27. 27.🌉 A beam bridge 135 m long is split by piers into 9 equal spans. How long is each span, in metres?
28. 28.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 160 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
30. 30.📐 On a plan, 1 cm stands for 10 m. A real bridge is 130 m long. How long is it on the plan, in centimetres?
31. 31.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
32. 32.🔍 Which is the odd one out? (a) repeat each test (b) measure the same way (c) use the same load (d) hide a failed test
33. 33.🪝 A load of 240 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
34. 34.🔍 Which is the odd one out? (a) a ceiling fan (b) a water filter (c) a lift (d) a cloud
35. 35.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.True or false: an aerospace engineer designs factory machines. (a) False (b) True
37. 37.True or false: to agree before changing is good teamwork. (a) True (b) False
38. 38.🛠️ People need to keep food fresh longer. Which invention helps? (a) a tunnel (b) a microscope (c) a fridge (d) a train
39. 39.📋 For a model bridge challenge, is “spend at most ₹100” a constraint or a criterion? (a) a criterion (b) a constraint
40. 40.🌉 A beam bridge 120 m long rests on the two river banks and on piers in between, making equal spans of 10 m. How many piers are there?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids