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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. 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 Fluorescent light is turned on to expose any left over - I.e in the cracks

2. A method of transmitting signals by changing the amplitude of a waves

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

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

5. Results from the changing anode and cathode regions over the entire surface

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

7. These have weaker secondary bonds which allow the stretching

8. Glass made with plates of plastic or resin or other material between two sheets of glass to prevent shattering

9. Load/area

10. 0.3%<X<0.6% carbon. mostly pear- lite - heat treatable. 0.4 used in axles

11. 100GHZ+

12. 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

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

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

15. 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

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

17. Hard - strong

18. A flexible communications cable that contains pairs of insulated copper wires that are twisted together for reduction of EMI and RFI and covered with an outer insulating jacket.

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. Ma/vr

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

22. 0.15%<X<0.3% carbon. more pearlite - most common steel. weldable up to 0.2 used in structures

23. Better properties that would come from machining

24. Horizontal

25. Mass X gravity X height

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

27. Being forced - under pressure - through a hole like toothpaste. either hot or cold

28. 1GHZ

29. Soft - ductile

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

31. Glass that is strengthened by introducing stress through rapid heating and cooling of the glass surfaces

32. Difference/original

33. When upper die is dropped on bottom

34. Good wear - case hardening. ball bearings

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

36. 1/4 of the wavelength (higher better)

37. Low pressure

38. Forming of metal by compressive force above recrystallization point.

39. Use of xrays passed through the material to make a visual record of internal structures on specially sensitized film

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

41. Degradation of a signal as it travels over a cable. Attenuation increased with higher frequencies

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

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

44. Supply current to the rotating commutator from an external source

45. Majority silicon X>1.5% for graphite. Graphite in flakes that cause stress points

46. 1%<X<2% carbon. more cementite - used for files

47. Steel reinforcing rusts - rust has a greater volume concrete then breaks of as a result.

48. 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

49. Usually used together - strengthening and toughness

50. High pressure