Engineering Worksheet: Final Test

Engineering lesson 24: Final engineering test · Set 433 · 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 cart is pulled to the right with 20 N and to the left with 15 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
2. 2.⚖️ A lever bar balances. The load is 350 N at 50 cm from the fulcrum. The effort is 350 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
3. 3.⚖️ 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 3 (b) class 1 (c) class 2
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
5. 5.🔍 Which is the odd one out? (a) leaving out steel bars (b) stacking loose bricks (c) using a light roof (d) using a heavy roof
6. 6.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
7. 7.📐 On a plan, 1 cm stands for 10 m. A real bridge is 20 m long. How long is it on the plan, in centimetres?
8. 8.🪢 Tension or compression: a suspension cable? (a) tension (b) compression
9. 9.🪢 Tension or compression: a tall bridge tower? (a) compression (b) tension
10. 10.💪 A cart is pulled to the right with 45 N and to the left with 35 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
11. 11.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🛠️ People need to make power from sunlight. Which invention helps? (a) a telephone (b) a dam (c) a fridge (d) a solar panel
13. 13.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
14. 14.True or false: a skipping rope needs a flexible material. (a) True (b) False
15. 15.🔺 A frame shaped like a hexagon is made of straws joined by loose pins, with 2 corner-to-corner braces. Is it rigid or wobbly? (a) wobbly (b) rigid
16. 16.🤝 Is it good or poor teamwork to own up to a mistake? (a) good teamwork (b) poor teamwork
17. 17.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) True (b) False
18. 18.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
19. 19.True or false: to listen to every idea is poor teamwork. (a) True (b) False
20. 20.🔺 Which strong shape does a roof truss use? (a) triangle (b) beam (c) arch (d) dome
21. 21.🧑‍🔧 Which kind of engineer keeps data safe online? (a) aerospace (b) biomedical (c) mechanical (d) computer
22. 22.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
23. 23.🦺 What protects your eyes when sawing or drilling? (a) safety goggles (b) nothing (c) sunglasses (d) a cap
24. 24.🔍 Which is the odd one out? (a) be under 30 cm tall (b) use at most 20 straws (c) spend at most ₹100 (d) stand in a fan breeze
25. 25.💪 Which force is at work: squeezing a lemon? (a) magnetic force (b) friction (c) muscular force (d) gravity
26. 26.Which of these needs a heat insulator? (a) a water tank (b) the core of a wire (c) an umbrella cover (d) an oven glove
27. 27.🧪 A paper bridge was tested three times. It held 270 g, 210 g and 150 g. What is the mean (average) load it held, in grams?
28. 28.🪢 Tension or compression: a tow rope on a car? (a) compression (b) tension
29. 29.True or false: a mechanical engineer runs a fertiliser plant. (a) False (b) True
30. 30.🪢 A sign weighing 510 N hangs from 3 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
31. 31.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
32. 32.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
33. 33.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the colour of rope (d) the direction of pull
34. 34.🪢 A sign weighing 240 N hangs from 2 identical vertical ropes that share the load equally. What is the tension in each rope, in newtons?
35. 35.🔄 Which design-process step is it to brainstorm many ideas? (a) Test (b) Ask (c) Plan (d) Imagine
36. 36.Which of these is reduce (use less)? (a) carry a cloth bag (b) give old books away (c) melt glass into new jars (d) melt cans into new cans
37. 37.🪢 Tension or compression: a stretched rubber band? (a) compression (b) tension
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 80 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
39. 39.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
40. 40.🔍 Which is the odd one out? (a) a railway track (b) a seashell (c) a bicycle (d) a mobile phone

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