Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 176 · 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 switch contact needs a flexible material. (a) False (b) True
2. 2.Which need does a microscope meet? (a) talk to someone far away (b) make water safe to drink (c) store water for summer (d) see very tiny things
3. 3.🪝 A load of 560 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
4. 4.True or false: “finish in 40 minutes” is a constraint (a limit). (a) False (b) True
5. 5.Which job does a civil engineer do? (a) builds rockets (b) wires a new building (c) designs car engines (d) designs a flyover
6. 6.⚙️ Which simple machine is a claw hammer on a nail? (a) wedge (b) inclined plane (c) lever (d) pulley
7. 7.🧑‍🔧 Which branch of engineering designs buildings, roads and bridges? (a) biomedical (b) civil (c) chemical (d) computer
8. 8.📋 For a model bridge challenge, is “spend at most ₹100” a constraint or a criterion? (a) a constraint (b) a criterion
9. 9.⚖️ A seesaw balances. Zoya (170 N) sits 1 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
10. 10.🦺 In the workshop, is it safe to cut towards your hand? (a) safe (b) not safe
11. 11.Which need does a telephone meet? (a) talk to someone far away (b) store water for summer (c) keep food fresh longer (d) carry many people far
12. 12.Which of these is reuse (use again)? (a) melt cans into new cans (b) switch off unused lights (c) use a jar as a pen stand (d) print on both sides
13. 13.🪝 A bucket weighing 170 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 3 N, a glass sheet 6 N, a wooden plank 9 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
15. 15.🌉 Which bridge type can cross the widest gap in one span? (a) suspension bridge (b) arch bridge (c) beam bridge (d) log bridge
16. 16.🔍 Which is the odd one out? (a) using a light roof (b) building tall and narrow (c) fitting rubber base pads (d) adding steel to concrete
17. 17.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
18. 18.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
19. 19.🛠️ A scientist asks “why does it happen?”. An engineer mostly asks … (a) what is for lunch? (b) who won the match? (c) why is the sky blue? (d) how can we build it?
20. 20.💪 A cart is pulled to the right with 70 N and to the left with 65 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
21. 21.🪢 Tension is a force that … (a) heats things (b) turns things (c) pulls or stretches (d) pushes or squeezes
22. 22.📐 On a plan, 1 cm stands for 2 m. A real bridge is 22 m long. How long is it on the plan, in centimetres?
23. 23.⚖️ A lever bar balances. The load is 630 N at ? cm from the fulcrum. The effort is 140 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.True or false: a civil engineer lays out a highway. (a) False (b) True
25. 25.🏋️ A force of 360 N pushes a cart 10 m along the floor. How much work is done, in joules?
26. 26.📋 Constraint: the tower must be no taller than 50 cm. The team’s tower is 46 cm tall. Is it within the constraint? (a) Yes (b) No
27. 27.🌉 A beam bridge is 400 m long. Piers split it into equal spans of 40 m. How many spans are there?
28. 28.True or false: “cables tied down at ends” is a suspension bridge. (a) False (b) True
29. 29.🔄 Which design-process step is it to define the problem? (a) Ask (b) Test (c) Improve (d) Imagine
30. 30.🧪 Three prototype bridges were tested with the same method. Design A held 260 g, design B held 210 g and design C held 160 g. Which design was the strongest? (a) design C (b) design B (c) design A
31. 31.True or false: a slab over a canal uses a beam. (a) False (b) True
32. 32.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Arjun (360 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
34. 34.🏋️ A force of 160 N pushes a cart 4 m along the floor. How much work is done, in joules?
35. 35.🔍 Which is the odd one out? (a) a satellite (b) a seashell (c) a mountain (d) a coral reef
36. 36.⚖️ A lever bar balances. The load is 600 N at 50 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
38. 38.True or false: a fixed pulley stays in one place. (a) False (b) True
39. 39.Which job does a mechanical engineer do? (a) wires a new building (b) plans a dam (c) designs bicycle gears (d) designs artificial limbs
40. 40.🏚️ What do engineers use to test models of buildings for earthquakes? (a) a shake table (b) a fridge (c) a microscope (d) a telescope

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