Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 398 · 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 of these is reduce (use less)? (a) melt cans into new cans (b) use a jar as a pen stand (c) fix a dripping tap (d) melt glass into new jars
2. 2.True or false: to put tools back after use is safe. (a) True (b) False
3. 3.True or false: to smooth a rough edge, use pliers. (a) False (b) True
4. 4.Which of these is in tension (pulled)? (a) a tow rope on a car (b) a pillar under a roof (c) a bridge pier (d) a brick at a wall base
5. 5.⚖️ A seesaw balances. Arjun (280 N) sits ? m from the pivot on one side; Zoya (280 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
6. 6.🧑‍🔧 Which kind of engineer wires a new building? (a) electrical (b) mechanical (c) biomedical (d) aerospace
7. 7.🔄 What is the FIRST step of the engineering design process? (a) Test (b) Ask (c) Improve (d) Create
8. 8.📋 For a model bridge challenge, is “use only paper and tape” a constraint or a criterion? (a) a constraint (b) a criterion
9. 9.🏚️ Three solid model towers are made of the same material. Tower A is 150 cm tall on a 30 cm wide base, tower B is 120 cm tall on a 30 cm base and tower C is 20 cm tall on a 10 cm base. Which is the easiest to tip over? (a) tower B (b) tower C (c) tower A
10. 10.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
11. 11.⚖️ A seesaw balances. Asha (560 N) sits ? m from the pivot on one side; Zoya (140 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
12. 12.⚖️ A seesaw balances. Kabir (390 N) sits ? m from the pivot on one side; Zoya (130 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
13. 13.🤝 How do engineers share a design with others? (a) only talking fast (b) no drawings at all (c) clear labelled sketches (d) secret notes
14. 14.🔺 A flat frame has 4 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
15. 15.🔍 Which is the odd one out? (a) let adults use hot glue (b) run while holding tools (c) leave tools on the floor (d) cut towards your hand
16. 16.🤝 A team of 4 shares 12 equal jobs fairly. Each job takes 7 minutes. How many minutes does each person work?
17. 17.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 720 N bucket on the axle, in newtons? (ideal)
18. 18.🔺 A frame shaped like a triangle is made of straws joined by loose pins, with 0 corner-to-corner braces. Is it rigid or wobbly? (a) rigid (b) wobbly
19. 19.🧱 Is graphite an electrical conductor or an insulator? (a) a conductor (b) an insulator
20. 20.🪝 A pulley system lifts a 640 N load with an effort of 160 N. What is its mechanical advantage (MA)?
21. 21.🌉 Which bridge type: “good for short gaps”? (a) beam bridge (b) suspension bridge (c) arch bridge
22. 22.🌉 Which bridge type: “deck hangs from cables”? (a) arch bridge (b) suspension bridge (c) beam bridge
23. 23.🔺 Which strong shape does an old stone bridge use? (a) triangle (b) dome (c) beam (d) arch
24. 24.True or false: “stand in a fan breeze” is a constraint (a limit). (a) True (b) False
25. 25.🔺 A flat frame has 7 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
26. 26.Which of these makes a building safer in earthquakes? (a) stacking loose bricks (b) using a heavy roof (c) building tall and narrow (d) adding cross bracing
27. 27.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) False (b) True
28. 28.Which of these is a wheel and axle? (a) a nutcracker (b) a water tap handle (c) a knife edge (d) a window blind cord
29. 29.📐 On a plan, 1 cm stands for 10 m. A real bridge is 30 m long. How long is it on the plan, in centimetres?
30. 30.Which of these is reduce (use less)? (a) reuse gift paper (b) refill a water bottle (c) buy less packaging (d) plant in old tyres
31. 31.True or false: “tall towers hold cables” is a suspension bridge. (a) True (b) False
32. 32.🧪 In a fair test, how many things do you change at a time? (a) two (b) all of them (c) one (d) none
33. 33.🧪 The first prototype held 270 g. After the team improved it, the new prototype held 290 g. How many more grams did it hold?
34. 34.Which of these needs a heat insulator? (a) an oven glove (b) a skipping rope (c) a boat hull (d) a water tank
35. 35.True or false: a round doorknob is a wedge. (a) False (b) True
36. 36.Which job is a hammer for? (a) measure a long length (b) drive in a nail (c) tighten a nut (d) measure an angle
37. 37.📋 Criteria are … (a) the limits on money (b) goals a design must meet (c) the tools you use (d) the team names
38. 38.True or false: “lift a cup of water” is a constraint (a limit). (a) True (b) False
39. 39.🪝 A load of 80 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
40. 40.True or false: to put tools back after use is not safe. (a) False (b) True

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