Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 313 · 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.🪢 Tension or compression: a stretched rubber band? (a) compression (b) tension
2. 2.🧱 Which property matters most for a skipping rope? (a) waterproof (b) flexible (c) transparent (d) electrical conductor
3. 3.📋 Constraint: the tower must be no taller than 50 cm. The team’s tower is 54 cm tall. Is it within the constraint? (a) No (b) Yes
4. 4.🤝 Is it good or poor teamwork to give kind feedback? (a) good teamwork (b) poor teamwork
5. 5.True or false: to give kind feedback is good teamwork. (a) False (b) True
6. 6.🦺 In the workshop, is it safe to touch a hot glue tip? (a) not safe (b) safe
7. 7.Which of these is a lever? (a) a nut and bolt (b) a crowbar (c) a water tap handle (d) a chisel
8. 8.🔍 Which is the odd one out? (a) play near a moving drill (b) touch a hot glue tip (c) use a cracked tool (d) wear safety goggles
9. 9.💪 Two children push a box to the right, one with 20 N and the other with 15 N. What is the net (total) force on the box, in newtons?
10. 10.🔍 Which is the odd one out? (a) a truck loading ramp (b) a road up a hill (c) a claw hammer on a nail (d) a playground slide
11. 11.📋 Criterion: the model bridge must hold at least 300 g. In the test it held 400 g. Does it meet the criterion? (a) Yes (b) No
12. 12.⚖️ A lever bar balances. The load is 120 N at 30 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 10 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a wooden plank (d) a glass sheet
14. 14.True or false: a computer engineer writes app software. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) test it only once (b) use the same load (c) skip writing results (d) hide a failed test
16. 16.⚖️ A seesaw balances. Ravi (300 N) sits ? m from the pivot on one side; Kabir (200 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
17. 17.🤝 Is it good or poor teamwork to talk over others? (a) good teamwork (b) poor teamwork
18. 18.True or false: a mechanical engineer designs factory machines. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a wheel on ball bearings (c) sand on a slippery path (d) a rough doormat
20. 20.Which need does a dam meet? (a) store water for summer (b) go through a mountain (c) see very tiny things (d) make water safe to drink
21. 21.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
22. 22.🧪 A paper bridge was tested three times. It held 310 g, 130 g and 250 g. What is the mean (average) load it held, in grams?
23. 23.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
24. 24.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) both weights are equal (d) turning effects match
25. 25.📐 A model car is drawn so that 1 cm stands for 30 cm. The car is 8 cm long in the drawing. How long is the real car, in centimetres?
26. 26.⚖️ A lever bar balances. The load is 180 N at 10 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.True or false: a magnifier lens needs a waterproof material. (a) False (b) True
28. 28.True or false: a chemical engineer builds a website. (a) True (b) False
29. 29.Which of these needs a heat insulator? (a) an oven glove (b) an umbrella cover (c) a spectacle lens (d) a switch contact
30. 30.🦺 In the workshop, is it safe to leave tools on the floor? (a) not safe (b) safe
31. 31.True or false: a rainbow is found in nature. (a) True (b) False
32. 32.⚖️ A seesaw balances. Zoya (570 N) sits 3 m from the pivot on one side; Ravi (570 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.Which of these needs an electrical conductor? (a) an umbrella cover (b) a water tank (c) a car windscreen (d) a switch contact
34. 34.True or false: using flexible joints makes a building safer in earthquakes. (a) True (b) False
35. 35.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
36. 36.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
37. 37.🪝 A winch has a wheel of radius 32 cm and an axle of radius 4 cm. What effort on the wheel lifts a 480 N bucket on the axle, in newtons? (ideal)
38. 38.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 2 (c) class 1
39. 39.🌉 A beam bridge 120 m long rests on the two river banks and on piers in between, making equal spans of 30 m. How many piers are there?
40. 40.🔍 Which is the odd one out? (a) a stretched rubber band (b) a tall bridge tower (c) a swing chain (d) a tent guy rope

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