angular unit in design drafiing is the degree (egr 29. Perpendioular lines inter

Question

angular unit in design drafiing is the degree (egr 29. Perpendioular lines intercept at 100 degrees 30. Coneentric circle have the same center point. 31. An acute angle is less than 90 degrees d bes the ease ofthe media to accept lines nd kon wtied ew-ve eftr. 33. Eraseability does not describe the ease of the media to allow lines and lethers to be erased and cleaned u 34. The more visible ghosting is; the better the eraseability. imensional stability refers to the ability of tdhe media to retain siae in varying weather conditions. 36. Transpareney allows drawings on one side of a drawing medium to be visible on the other side 37. Vellum is not the most popular or common dratting paper drawing 38. Zoning is a technique used in large paper sizes to aid in quickly locating information on 39. English A-size paper has dimensions of 9x11 in 40. Metric paper size A4 has dimensioas 297 x 210 mm. 41. English B paper has dimensions 17 x 22 in. 42. Standard or ANSI recommended text beight is 3 mm (0.125 43. Center lines must cross or extend beyond visible or edge lines 44. Hidden line type represents hidden edges in objects 45. Hidden lines have lower precedence over center lines. 46. Visible line type represents the external edges of object 47. Visible line type has the highest precedence in graphic objects computers. 48. Computer graphic models are not geometric models created with the aid of 49. Computer graphic models can be created in vector or raster forms 50. Computer vector graphics are not composed of lines and curves that have precise mathematical definitions. 51. Computer raster graphics are composed of color patches known as pixels. 52. Vector images cannot be converted to raster images and verse versa. 53. Some computer models are photo-realistic and are sometimes called virtual models. 54. Board drafting is used to create pictorial and orthographic views which are 3D objects. 55. 2-D drawings are abstract in nature, some technical skills are necessary for correct and proper interpretations 56. Isometric drawings have the appearance of 3D models that mimic human vision. 57. Isometric drawings are constructed on a 2D coordinate plane. 58. An isometric drawing is not a 3D model because it is constructed on a 2D coordinate plane. 59. 3-D computer models are not the most accurate models of objects after physical models.

Explanation / Answer

28.) True

29.) False - Perpendicular intercept at 90 degree

30.) True

31.) True

32.) True

33.) False - Eraseability describes the ease of the media to allow lines and letters to be cleaned up.

34.) False - the more visible ghosting is , less is the erasibility

35.) True

36.) True

37.) True - Cotton fibre is most popular or common drafting paper.

38.) True

39.) False - A size paper is of 8.5" X 11"

40.) True

41.) False - Its 17 X 11 in.

42.) False - Standard text height is 2.5 mm

43.) True

44.) True

45.) False - Hidden lines take precedence over center lines

46.) True

47.) True

48.) False - Today most geometric modeling is done with computers.

49.) True

50.) False - Vector graphics is composed of lines or curves.

51.) True

52.) True

53.) True

54.) True

55.) True

56.) False - It is a representation of 3 - D object, aligned to three axes. Perspective view mimics human vision not isometric.

57.) Flase - Isometric are constructed on a 3D coordinate plane.

58.) True

59.) True

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