Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 174 · 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.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the axle (c) the effort (d) the load
2. 2.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
3. 3.📋 Your team’s budget is ₹30. You must buy one roll of tape for ₹5. Straws cost ₹1 each. What is the greatest number of straws you can buy?
4. 4.💪 A box weighs 590 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
5. 5.🔺 A flat frame has 11 straight sides joined by loose pins at the corners. What is the least number of corner-to-corner braces needed to make it rigid?
6. 6.Which of these is caused by gravity? (a) a fridge magnet sticks (b) brakes stop a bicycle (c) an apple falls down (d) lifting a school bag
7. 7.📋 Constraint: the tower must be no taller than 70 cm. The team’s tower is 68 cm tall. Is it within the constraint? (a) No (b) Yes
8. 8.💪 A cart is pulled to the right with 30 N and to the left with 20 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
9. 9.🤝 A team of 2 shares 6 equal jobs fairly. Each job takes 7 minutes. How many minutes does each person work?
10. 10.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a sharp wedge (d) a loose rope
11. 11.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
12. 12.⚖️ A seesaw balances. Ravi (560 N) sits 3 m from the pivot on one side; Asha (420 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
13. 13.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
14. 14.True or false: stacking loose bricks makes a building less safe in earthquakes. (a) True (b) False
15. 15.Which job is a protractor for? (a) check a shelf is level (b) measure a long length (c) tighten a nut (d) measure an angle
16. 16.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 1 (c) class 2
17. 17.♻️ Is flowing river water a renewable or a non-renewable energy source? (a) non-renewable (b) renewable
18. 18.🧱 Which property matters most for the core of a wire? (a) waterproof (b) electrical conductor (c) transparent (d) flexible
19. 19.🔢 To follow the engineering design process, which comes first: “Imagine” or “Improve”? (a) Imagine (b) Improve
20. 20.💪 A cart is pulled to the right with 85 N and to the left with 100 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
21. 21.📐 A model car is drawn so that 1 cm stands for 40 cm. The car is 13 cm long in the drawing. How long is the real car, in centimetres?
22. 22.📐 How many centimetres are in 1 metre? (a) 60 (b) 1000 (c) 100 (d) 10
23. 23.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.True or false: “finish in 40 minutes” is a criterion (a goal). (a) False (b) True
25. 25.🌉 A beam bridge 420 m long is split by piers into 12 equal spans. How long is each span, in metres?
26. 26.Which of these needs a heat insulator? (a) a switch contact (b) the core of a wire (c) a skipping rope (d) a cooking pot handle
27. 27.🔺 One side of a straw bridge is a row of 2 triangles standing point-up and point-down in turn, each sharing a side with the next. How many straws does it use?
28. 28.🧪 Three prototype bridges were tested with the same method. Design A held 100 g, design B held 200 g and design C held 150 g. Which design was the weakest? (a) design C (b) design A (c) design B
29. 29.🔺 Why can an arch carry heavy loads? (a) it is very light (b) it bends easily (c) it works in compression (d) it is hollow
30. 30.🔄 Which design-process step is it to follow the plan to build? (a) Imagine (b) Test (c) Create (d) Improve
31. 31.🔍 Which is the odd one out? (a) use the same load (b) repeat each test (c) change only one thing (d) change lots at once
32. 32.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
33. 33.🔍 Which is the odd one out? (a) a jar lid (b) a window blind cord (c) a bottle cap (d) a nut and bolt
34. 34.True or false: “the simplest bridge” is a suspension bridge. (a) False (b) True
35. 35.True or false: skating on ice gives more friction. (a) True (b) False
36. 36.🪢 Tension or compression: a crane lifting cable? (a) tension (b) compression
37. 37.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
38. 38.💪 Which force is at work: a fridge magnet sticks? (a) friction (b) gravity (c) magnetic force (d) muscular force
39. 39.⚖️ A seesaw balances. Zoya (340 N) sits ? m from the pivot on one side; Kabir (340 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
40. 40.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?

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