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Engineering Studies

Subject : engineering
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Hard - strong

2. Difference/original

3. Produces; harder - stronger and less ductile product

4. Low pressure

5. Between 2000-35 -700km above the earth's surface.

6. A method of transmitting signals by changing the frequency of a wave

7. X<1% silicon no graphite - has carbon/carbide. very brittle

8. Squeezing of the hot metal between two shaped dies excess is cut off

9. Usually used together - strengthening and toughness

10. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures

11. Hard - brittle

12. Softening a material such as metal by controlled heating and cooling. This makes the metal less brittle and more easily adaptable. Soaking till austenite then cooling slowly. large grains

13. Vertical

14. Dye is sprayed onto a surface - with excess being wiped away - meaning any left on the piece would be in cracks that exist in it. A developer is then added to it to expose any left over - I.e in the cracks

15. Elongation of grain flow in direction of rolling

16. Load/effort

17. 100khz

18. High pressure

19. A device that converts the AC inside a DC generator to a DC output or converts a DC supply to an AC inside a DC motor.keeping the armature rotating

20. 100GHZ+

21. 1GHZ

22. Can only be softened once - bonded strongly - generally stronger that thermoplastics. stronger secondary bonds

23. Used where scarifical anodes cannot supply enough protection - offshore oil rigs - buried pipes - big things. protection is provided by connecting a rectifier to provide a direct current source between the anode and the metal being protected.

24. Occurs when the metal is hammered by a vertically moving tool onto a stationary tool

25. Makes brittle by heating and then cooling quickly - less flexible. Red Heat then quenching

26. An orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place all the time

27. A cable made of optical fibers that can transmit large amounts of information at the speed of light

28. Allows for another signal to be sent along the carrier signal

29. 1/4 of the wavelength (higher better)

30. Based on the principle that magnetic materials will have distorted magnetic fields in the vicinity of material defects

31. Soft - ductile

32. An orbit less than 1 -500 km. above the Earth's surface.

33. Sound waves sent through a material - much like sonar. Internal defects appear because they use more energy to go through it.

34. Good wear - case hardening. ball bearings

35. x<0.15% carbon. ferrite. good for cold working - rolling sheets

36. Soaked cast iron at 870c for long time then cooled slow

37. Good high temp wear - tools

38. Ma/vr x 100/1

39. These have weaker secondary bonds which allow the stretching

40. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles

41. Mass X gravity X height

42. A strong hard building material composed of sand and gravel and cement and water

43. Ma/vr

44. Can be reflected of the ionosphere - 3 to 30 megahertz

45. A motor that is light - rugged and very reliable - runs on ac current and are more common in robotics. Can only run at a certain speed

46. Maximum bending moments X distance to natural axis/ second moment of area

47. Solid at room temp - weak secondary bonds. can be reheated multiply times.

48. When upper die is dropped on bottom

49. 1%<X<2% carbon. more cementite - used for files

50. Field winding parallel to armature winding. Bad for direct coupling