Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 318 · 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.🔺 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?
2. 2.📐 How many millimetres are in 1 centimetre? (a) 5 (b) 1000 (c) 100 (d) 10
3. 3.Which of these is a wheel and axle? (a) a well winch handle (b) a bottle cap (c) an axe blade (d) a window blind cord
4. 4.🔺 Why can an arch carry heavy loads? (a) it bends easily (b) it is very light (c) it works in compression (d) it is hollow
5. 5.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
7. 7.🏚️ Why are flexible joints good in an earthquake? (a) they are cheap (b) they bend, not break (c) they look nice (d) they stop shaking
8. 8.🔍 Which is the odd one out? (a) powder on a carrom board (b) sand on a slippery path (c) a smooth steel slide (d) oil on a squeaky hinge
9. 9.💪 Which force is at work: shoes grip the floor? (a) gravity (b) friction (c) magnetic force (d) muscular force
10. 10.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) closer to the pivot (d) farther from the pivot
11. 11.True or false: a water tank needs a heat insulator. (a) False (b) True
12. 12.🧑‍🔧 Which branch of engineering works on aeroplanes and rockets? (a) civil (b) chemical (c) aerospace (d) computer
13. 13.🔍 Which is the odd one out? (a) a screw jack (b) the tip of a nail (c) a knife edge (d) a door stopper
14. 14.🔍 Which is the odd one out? (a) use only paper and tape (b) float for 1 minute (c) finish in 40 minutes (d) use at most 20 straws
15. 15.True or false: to measure an angle, use sandpaper. (a) True (b) False
16. 16.True or false: drawing up a well bucket is a pull. (a) True (b) False
17. 17.🧪 The first prototype held 150 g. After the team improved it, the new prototype held 340 g. How many more grams did it hold?
18. 18.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
19. 19.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
20. 20.🔍 Which is the odd one out? (a) spend at most ₹100 (b) use only paper and tape (c) fit on a school desk (d) keep ice for 1 hour
21. 21.True or false: a fixed pulley only changes direction. (a) True (b) False
22. 22.🏚️ Does making brittle joints make a building safer or less safe in an earthquake? (a) safer in earthquakes (b) less safe
23. 23.🌉 A beam bridge is 500 m long. Piers split it into equal spans of 50 m. How many spans are there?
24. 24.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) colour of bar (d) distance from fulcrum
25. 25.⚖️ A seesaw balances. Meena (510 N) sits 3 m from the pivot on one side; Kabir (510 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
26. 26.Which job is a tape measure for? (a) grip and bend wire (b) turn a screw (c) check a shelf is level (d) measure a long length
27. 27.Which of these is in compression (pushed)? (a) a table leg (b) a tug of war rope (c) a stretched rubber band (d) a tow rope on a car
28. 28.Which of these uses triangles? (a) an old stone bridge (b) a round palace roof (c) a bicycle frame (d) a lintel over a door
29. 29.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
30. 30.True or false: to hide a mistake is poor teamwork. (a) True (b) False
31. 31.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) unbalanced (d) gravity
32. 32.🪢 A sign weighing 720 N hangs from 4 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
33. 33.True or false: a telephone helps people keep food fresh longer. (a) False (b) True
34. 34.🧑‍🔧 Which kind of engineer runs a fertiliser plant? (a) biomedical (b) computer (c) aerospace (d) chemical
35. 35.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 2 (c) class 3
36. 36.🧪 Three prototype bridges were tested with the same method. Design A held 310 g, design B held 260 g and design C held 360 g. Which design was the strongest? (a) design A (b) design B (c) design C
37. 37.🛞 Friction acts … (a) only on ice (b) with the motion (c) against the motion (d) only upwards
38. 38.True or false: to build the model is the Create step. (a) True (b) False
39. 39.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
40. 40.🔍 Which is the odd one out? (a) fitting rubber base pads (b) using flexible joints (c) leaving out steel bars (d) keeping a simple shape

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