Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 217 · 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.🧪 What is a prototype? (a) a broken part (b) an early test model (c) a sales poster (d) the final product
2. 2.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 120 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.🔍 Which is the odd one out? (a) a waterfall (b) a mountain (c) a mobile phone (d) a seashell
4. 4.🛠️ People need to keep food fresh longer. Which invention helps? (a) a train (b) a microscope (c) a fridge (d) a water filter
5. 5.True or false: an aerospace engineer builds rockets. (a) True (b) False
6. 6.Which of these is a screw? (a) a bottle opener (b) a well-bucket rope wheel (c) a chisel (d) a nut and bolt
7. 7.Which of these is reduce (use less)? (a) fix a dripping tap (b) melt glass into new jars (c) give old books away (d) pulp old paper
8. 8.True or false: “a curve under the deck” is an arch bridge. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a cloud (b) a volcano (c) a mountain (d) a satellite
10. 10.True or false: a grippy rubber sole gives less friction. (a) True (b) False
11. 11.Which of these uses an arch? (a) a planetarium roof (b) an electric pylon (c) a shelf on two brackets (d) a fort gateway
12. 12.🔍 Which is the odd one out? (a) put tools back after use (b) play near a moving drill (c) run while holding tools (d) cut towards your hand
13. 13.🌉 In a stone arch bridge, the stones are in … (a) tension (b) friction (c) compression (d) no force
14. 14.True or false: a mechanical engineer designs satellites. (a) False (b) True
15. 15.Which of these needs a heat insulator? (a) a plug pin (b) a tea flask lining (c) a car windscreen (d) a window pane
16. 16.True or false: “spend at most ₹100” is a criterion (a goal). (a) True (b) False
17. 17.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 200 g and design C held 250 g. Which design was the weakest? (a) design A (b) design B (c) design C
18. 18.Which of these is a beam bridge? (a) the simplest bridge (b) pushes out on its ends (c) a curve under the deck (d) stones squeezed together
19. 19.True or false: to help a stuck teammate is good teamwork. (a) True (b) False
20. 20.⚖️ A lever bar balances. The load is 400 N at 10 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.💪 Which force pulls everything towards the Earth? (a) wind (b) magnetism (c) gravity (d) friction
22. 22.⚙️ Which simple machine is a round doorknob? (a) wedge (b) pulley (c) lever (d) wheel and axle
23. 23.🧪 Three prototype bridges were tested with the same method. Design A held 300 g, design B held 250 g and design C held 200 g. Which design was the strongest? (a) design C (b) design A (c) design B
24. 24.💪 In a tug of war, one team pulls left with 90 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
25. 25.True or false: to put tools back after use is not safe. (a) True (b) False
26. 26.Which of these makes a building less safe in earthquakes? (a) fitting rubber base pads (b) raising heavy tanks high (c) keeping a simple shape (d) using flexible joints
27. 27.🏚️ Does raising heavy tanks high make a building safer or less safe in an earthquake? (a) safer in earthquakes (b) less safe
28. 28.🛠️ Which of these is a problem an engineer could solve? (a) a sad song (b) a road that floods (c) a lost cricket match (d) a boring story
29. 29.True or false: a brick at a wall base is in compression (pushed). (a) False (b) True
30. 30.♻️ Which energy source will never run out? (a) coal (b) petrol (c) sunlight (d) diesel
31. 31.🤝 How do engineers share a design with others? (a) only talking fast (b) no drawings at all (c) clear labelled sketches (d) secret notes
32. 32.🧪 The first prototype held 120 g. After the team improved it, the new prototype held 140 g. How many more grams did it hold?
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 90 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
35. 35.🪢 Tension or compression: a pillar under a roof? (a) tension (b) compression
36. 36.⚙️ Which simple machine is a playground slide? (a) wheel and axle (b) inclined plane (c) screw (d) wedge
37. 37.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
38. 38.📋 A design meets every criterion but costs more than the budget. Is it acceptable? (a) yes, it works (b) only if it is red (c) no, it breaks a limit (d) yes, always
39. 39.Which of these is recycle (make new things)? (a) melt cans into new cans (b) print on both sides (c) reuse gift paper (d) switch off unused lights
40. 40.📐 On a plan, 1 cm stands for 10 m. A real bridge is 40 m long. How long is it on the plan, in centimetres?

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