Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 551 · 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.📐 How many metres are in 1 kilometre? (a) 10000 (b) 10 (c) 100 (d) 1000
2. 2.Which of these makes a building safer in earthquakes? (a) using a heavy roof (b) leaving out steel bars (c) making brittle joints (d) keeping a simple shape
3. 3.🔺 Which strong shape does an electric pylon use? (a) arch (b) dome (c) beam (d) triangle
4. 4.🔺 A frame shaped like a hexagon is made of straws joined by loose pins, with 0 corner-to-corner braces. Is it rigid or wobbly? (a) wobbly (b) rigid
5. 5.🔍 Which is the odd one out? (a) having a wide base (b) leaving out steel bars (c) making brittle joints (d) stacking loose bricks
6. 6.♻️ Reduce, reuse or recycle: switch off unused lights? (a) reduce (b) recycle (c) reuse
7. 7.Which of these uses a beam? (a) a truss bridge side (b) a crane arm (c) a planetarium roof (d) a shelf on two brackets
8. 8.📐 Why do engineers use scale drawings? (a) big things fit on paper (b) to hide sizes (c) to save ink only (d) to make them pretty
9. 9.🪢 A concrete slab weighing 3200 N rests evenly on 2 identical pillars. What compression force does each pillar carry, in newtons?
10. 10.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the effort (c) the load (d) the pulley
11. 11.True or false: to tie back long hair is not safe. (a) True (b) False
12. 12.🏚️ Why are flexible joints good in an earthquake? (a) they bend, not break (b) they are cheap (c) they look nice (d) they stop shaking
13. 13.Which of these uses a dome? (a) a planetarium roof (b) a slab over a canal (c) a crane arm (d) an electric pylon
14. 14.Which job does a biomedical engineer do? (a) designs hearing aids (b) designs electric motors (c) designs bicycle gears (d) writes app software
15. 15.Which need does a bridge meet? (a) carry many people far (b) cross a wide river (c) go through a mountain (d) keep food fresh longer
16. 16.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
17. 17.📐 On a plan, 1 cm stands for 20 m. A real bridge is 180 m long. How long is it on the plan, in centimetres?
18. 18.🔍 Which is the odd one out? (a) skating on ice (b) powder on a carrom board (c) oil on a squeaky hinge (d) chalk on a gym bar
19. 19.📐 On a plan, 1 cm stands for 2 m. A wall is 9 cm long on the plan. How long is the real wall, in metres?
20. 20.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 10 (d) 6
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
22. 22.📋 A design meets every criterion but costs more than the budget. Is it acceptable? (a) yes, it works (b) yes, always (c) no, it breaks a limit (d) only if it is red
23. 23.♻️ A family used to throw away 6 plastic bags a week. They now carry cloth bags. How many plastic bags do they save in 7 weeks?
24. 24.🦺 Who should use hot glue guns and power tools in a kids’ project? (a) an adult (b) a stranger (c) any child alone (d) the youngest child
25. 25.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
26. 26.🔄 What is the FIRST step of the engineering design process? (a) Test (b) Ask (c) Improve (d) Create
27. 27.True or false: “spend at most ₹100” is a constraint (a limit). (a) True (b) False
28. 28.Which need does a telephone meet? (a) go through a mountain (b) talk to someone far away (c) cross a wide river (d) reach a top floor fast
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 11 N, sandpaper 15 N, ice 3 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
30. 30.📋 Criterion: the model bridge must hold at least 1000 g. In the test it held 900 g. Does it meet the criterion? (a) No (b) Yes
31. 31.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 300 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.True or false: a table leg is in tension (pulled). (a) True (b) False
33. 33.⚖️ A seesaw balances. Arjun (390 N) sits 1 m from the pivot on one side; Asha (130 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
34. 34.True or false: to follow the plan to build is the Create step. (a) False (b) True
35. 35.🛠️ Which of these is a problem an engineer could solve? (a) a lost cricket match (b) a road that floods (c) a boring story (d) a sad song
36. 36.🧪 Why do engineers make prototypes? (a) to avoid testing (b) to decorate a room (c) to test ideas cheaply (d) to sell them at once
37. 37.📐 On a plan, 1 cm stands for 5 m. A wall is 2 cm long on the plan. How long is the real wall, in metres?
38. 38.⚖️ A lever bar balances. The load is 500 N at ? cm from the fulcrum. The effort is 200 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.🌉 Which bridge type: “good for short gaps”? (a) arch bridge (b) suspension bridge (c) beam bridge
40. 40.🔺 Which strong shape does a truss bridge side use? (a) beam (b) triangle (c) arch (d) dome

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