Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 844 · 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 model car is drawn so that 1 cm stands for 10 cm. The car is 14 cm long in the drawing. How long is the real car, in centimetres?
2. 2.🔄 After testing, a design does not work well. What comes next? (a) Imagine (b) give up (c) Improve (d) Ask
3. 3.Which job does a chemical engineer do? (a) designs power lines (b) refines crude oil (c) lays out a highway (d) plans a space mission
4. 4.Which of these is made by engineers? (a) a waterfall (b) a seashell (c) a volcano (d) a satellite
5. 5.Which job is sandpaper for? (a) grip and bend wire (b) smooth a rough edge (c) turn a screw (d) tighten a nut
6. 6.Which of these is in compression (pushed)? (a) a tug of war rope (b) a crane lifting cable (c) a tent guy rope (d) a temple column
7. 7.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
8. 8.⚖️ A seesaw balances. Arjun (480 N) sits 2 m from the pivot on one side; Meena (240 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
9. 9.🛠️ What does an engineer mainly do? (a) designs useful solutions (b) sells tickets (c) grows crops (d) only paints pictures
10. 10.Which of these is found in nature? (a) a river (b) a water filter (c) a bicycle (d) a dam
11. 11.🤝 A teammate’s idea seems odd. What should you do first? (a) ignore it (b) walk away (c) laugh at it (d) listen and ask why
12. 12.True or false: a roof truss uses triangles. (a) True (b) False
13. 13.📋 For a model bridge challenge, is “float for 1 minute” a constraint or a criterion? (a) a criterion (b) a constraint
14. 14.🏚️ Why is a wide base safer? (a) it is harder to tip over (b) it is lighter (c) it is taller (d) it is colourful
15. 15.Which of these uses a beam? (a) a round palace roof (b) a slab over a canal (c) a bicycle frame (d) an electric pylon
16. 16.♻️ A project report has 70 pages. How many sheets of paper are needed if it is printed on both sides of each sheet?
17. 17.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) closer to the pivot (d) on the pivot
18. 18.True or false: “pushes out on its ends” is a beam bridge. (a) True (b) False
19. 19.📋 For a model bridge challenge, is “use at most 20 straws” a constraint or a criterion? (a) a criterion (b) a constraint
20. 20.🔺 A flat frame has 12 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
21. 21.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
22. 22.Which of these is made by engineers? (a) a bicycle (b) a river (c) a waterfall (d) a banyan tree
23. 23.🔍 Which is the odd one out? (a) a tent guy rope (b) a swing chain (c) a pillar under a roof (d) a crane lifting cable
24. 24.📐 On a plan, 1 cm stands for 20 m. A wall is 3 cm long on the plan. How long is the real wall, in metres?
25. 25.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
26. 26.Which of these makes a building safer in earthquakes? (a) stacking loose bricks (b) building tall and narrow (c) leaving out steel bars (d) adding cross bracing
27. 27.True or false: your forearm is a class 3 lever (effort in the middle). (a) False (b) True
28. 28.True or false: to guess, do not measure is good testing. (a) True (b) False
29. 29.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
30. 30.True or false: a fixed pulley halves the effort. (a) False (b) True
31. 31.🪝 A pulley system lifts a 120 N load with an effort of 60 N. What is its mechanical advantage (MA)?
32. 32.🧪 The first prototype held 170 g. After the team improved it, the new prototype held 180 g. How many more grams did it hold?
33. 33.💪 In a tug of war, one team pulls right with 50 N and the other pulls left with 40 N. What is the size of the net force, in newtons?
34. 34.⚖️ A lever bar balances. The load is 700 N at 50 cm from the fulcrum. The effort is 500 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.True or false: a skipping rope needs a heat insulator. (a) True (b) False
36. 36.🔢 To build and test a straw bridge, what comes right after “choose and draw one”? (a) sketch three ideas (b) read the challenge rules (c) load it with coins (d) build it with straws
37. 37.True or false: to use a cracked tool is safe. (a) True (b) False
38. 38.True or false: a crane lifting cable is in tension (pulled). (a) True (b) False
39. 39.True or false: a mechanical engineer designs knee implants. (a) True (b) False
40. 40.🧪 A paper bridge was tested three times. It held 170 g, 120 g and 220 g. What is the mean (average) load it held, in grams?

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