Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 416 · 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.True or false: a tug of war is a push. (a) True (b) False
2. 2.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) add sand (d) press parts harder
3. 3.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) stop all friction (c) make new energy (d) use a smaller force
4. 4.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
5. 5.🔄 Which design-process step is it to find the limits? (a) Test (b) Plan (c) Ask (d) Imagine
6. 6.⚖️ A seesaw balances. Kabir (640 N) sits 4 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
7. 7.⚙️ Which simple machine is a wheelchair ramp? (a) wedge (b) screw (c) inclined plane (d) pulley
8. 8.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
9. 9.True or false: a door stopper is a lever. (a) True (b) False
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 4 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
11. 11.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
12. 12.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
13. 13.True or false: an aerospace engineer designs satellites. (a) False (b) True
14. 14.🔢 To build and test a straw bridge, which comes first: “strengthen the weak part” or “read the challenge rules”? (a) strengthen the weak part (b) read the challenge rules
15. 15.🤝 How do engineers share a design with others? (a) clear labelled sketches (b) no drawings at all (c) secret notes (d) only talking fast
16. 16.📐 Why do engineers use scale drawings? (a) to make them pretty (b) to hide sizes (c) to save ink only (d) big things fit on paper
17. 17.Which need does a telephone meet? (a) keep food fresh longer (b) carry many people far (c) talk to someone far away (d) reach a top floor fast
18. 18.🌉 Which bridge type: “a log across a stream”? (a) beam bridge (b) arch bridge (c) suspension bridge
19. 19.📋 A constraint is … (a) a final test (b) a goal for success (c) a kind of glue (d) a limit you must keep to
20. 20.Which job is a hand drill for? (a) turn a screw (b) measure a long length (c) make a hole in wood (d) measure an angle
21. 21.True or false: “finish in 40 minutes” is a constraint (a limit). (a) False (b) True
22. 22.Which of these is caused by friction? (a) a compass needle turns (b) brakes stop a bicycle (c) lifting a school bag (d) a river flows downhill
23. 23.♻️ Which is the BEST order to think about waste? (a) recycle, reuse, reduce (b) reuse, recycle, reduce (c) burn, bury, forget (d) reduce, reuse, recycle
24. 24.📋 For a model bridge challenge, is “spend at most ₹100” a constraint or a criterion? (a) a criterion (b) a constraint
25. 25.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
27. 27.📐 On a plan, 1 cm stands for 10 m. A real bridge is 90 m long. How long is it on the plan, in centimetres?
28. 28.🔄 Which design-process step is it to try it out? (a) Test (b) Improve (c) Create (d) Imagine
29. 29.🤝 A team of 2 shares 10 equal jobs fairly. Each job takes 8 minutes. How many minutes does each person work?
30. 30.💪 In a tug of war, one team pulls left with 60 N and the other pulls right with 35 N. What is the size of the net force, in newtons?
31. 31.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 1 (c) class 3
32. 32.📐 On a plan, 1 cm stands for 10 m. A real bridge is 140 m long. How long is it on the plan, in centimetres?
33. 33.🌉 Which bridge type can cross the widest gap in one span? (a) suspension bridge (b) log bridge (c) arch bridge (d) beam bridge
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
35. 35.💪 In which unit do we measure force? (a) newton (N) (b) litre (L) (c) second (s) (d) metre (m)
36. 36.True or false: a bridge is found in nature. (a) True (b) False
37. 37.📐 On a plan, 1 cm stands for 2 m. A wall is 12 cm long on the plan. How long is the real wall, in metres?
38. 38.Which job does a mechanical engineer do? (a) runs a fertiliser plant (b) designs factory machines (c) plans a dam (d) plans a power grid
39. 39.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push

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