Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 47 · 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.📋 Constraint: the tower must be no taller than 70 cm. The team’s tower is 64 cm tall. Is it within the constraint? (a) No (b) Yes
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
3. 3.🪝 A winch has a wheel of radius 14 cm and an axle of radius 2 cm. What effort on the wheel lifts a 980 N bucket on the axle, in newtons? (ideal)
4. 4.🔍 Which is the odd one out? (a) wear safety goggles (b) run while holding tools (c) play near a moving drill (d) use a cracked tool
5. 5.Which of these is caused by friction? (a) a rolling ball slows (b) a river flows downhill (c) a thrown ball comes down (d) squeezing a lemon
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
7. 7.🔧 Which tool would you use to turn a screw? (a) a spirit level (b) a hammer (c) a tape measure (d) a screwdriver
8. 8.Which of these is caused by gravity? (a) rubbing hands warms them (b) brakes stop a bicycle (c) a rolling ball slows (d) a thrown ball comes down
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
10. 10.🔍 Which is the odd one out? (a) leaving out steel bars (b) adding steel to concrete (c) having a wide base (d) using flexible joints
11. 11.🧱 Which material is best for the core of an electric wire? (a) copper (b) rubber (c) wood (d) glass
12. 12.🔄 Which design-process step is it to build the model? (a) Improve (b) Imagine (c) Ask (d) Create
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 4 N, a glass sheet 7 N, a wooden plank 10 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
14. 14.True or false: a rainbow is found in nature. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) iron (b) steel (c) rubber (d) graphite
16. 16.🧑‍🔧 Which branch of engineering uses engineering to help doctors? (a) electrical (b) aerospace (c) civil (d) biomedical
17. 17.True or false: to tie back long hair is not safe. (a) True (b) False
18. 18.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
19. 19.🧪 A paper bridge was tested three times. It held 210 g, 100 g and 140 g. What is the mean (average) load it held, in grams?
20. 20.True or false: an aerospace engineer builds a website. (a) True (b) False
21. 21.Which of these is found in nature? (a) a dam (b) a mountain (c) a bridge (d) a lift
22. 22.🔍 Which is the odd one out? (a) spend at most ₹100 (b) keep ice for 1 hour (c) stand in a fan breeze (d) roll at least 2 metres
23. 23.📋 Your team’s budget is ₹29. You must buy one roll of tape for ₹5. Straws cost ₹3 each. What is the greatest number of straws you can buy?
24. 24.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
25. 25.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
26. 26.True or false: plucking a mango is a push. (a) False (b) True
27. 27.🏚️ Three solid model towers are made of the same material. Tower A is 60 cm tall on a 30 cm wide base, tower B is 10 cm tall on a 10 cm base and tower C is 90 cm tall on a 30 cm base. Which is the easiest to tip over? (a) tower B (b) tower A (c) tower C
28. 28.💪 A cart is pulled to the right with 80 N and to the left with 75 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
29. 29.🪢 A concrete slab weighing 2700 N rests evenly on 3 identical pillars. What compression force does each pillar carry, in newtons?
30. 30.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) stop all friction (c) use a smaller force (d) make new energy
31. 31.True or false: a wet tiled floor gives more friction. (a) True (b) False
32. 32.True or false: a boat hull needs a flexible material. (a) False (b) True
33. 33.💪 A cart is pulled to the right with 55 N and to the left with 65 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
34. 34.🪢 Tension or compression: a suspension cable? (a) compression (b) tension
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 80 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
36. 36.True or false: making brittle joints makes a building safer in earthquakes. (a) True (b) False
37. 37.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
38. 38.🏚️ Does using a heavy roof make a building safer or less safe in an earthquake? (a) less safe (b) safer in earthquakes
39. 39.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
40. 40.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)

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