Deck 12: Sections, Revolutions, and Conventional Breaks

Question 1

What type of line is used in a half-sectional view to separate the sectioned area from the nonsectioned area?

Answer 1

A centerline is used to separate the sectioned and unsectioned areas.

Question 2

List four items that remain unsectioned in a sectional view when the cutting-plane line cuts through parallel to the axes of the items.

Answer 2

Bolts, screws, webs, gear teeth, nuts, rivets, shafts, ribs, spokes, bearings, pins and keys

Question 3

Discuss the cutting-plane line associated with a broken-out section, and explain how the broken-out section is drawn.

Answer 3

. There is no cutting-plane line; a break line is used instead.

Question 4

How are section lines commonly treated when sectioning very thin parts, less than .016 in. (4 mm) thick?

Question 5

Describe a situation when a cutting-plane line is omitted in sectioning drawings.

Question 6

Question 7

Describe the potential advantage of a sectional view over a multiview.

Question 8

Describe two ways that a cutting-plane line can be drawn, not including the arrow method.

Question 9

What are coded section lines?

Question 10

Describe the arrowheads used on cutting-plane lines.

Question 11

What type of break line is generally associated with a broken-out section?

Question 12

Explain and use a sketch to show the relationship of the cutting-plane line arrowheads to the sectional view.

Question 13

In what situations are conventional breaks commonly used?

Question 14

Describe the purpose and advantage of a half section.

Question 15

When can the cutting-plane line be omitted?

Question 16

How much of the object does a full section actually remove?

Question 17

At what angles are section lines typically drawn, and what basic rules are followed when drawing section lines?

Question 18

Give the text height used for cutting-plane line labels and the correlated view identification.

Question 19

Discuss the advantage of using conventional revolutions.

Question 20

Discuss the difference between a revolved and removed sec- tion. An example can be used.

Question 21

Explain the use of reference arrow method for identifying sections.

Question 22

Describe the use of cross-reference zoning for sectioning applications.

Question 23

Describe how multiple removed sections are generally arranged on the sheet.

Question 24

Describe the error found in the following drawings: (a), (b), (c), (d), and (e) on next page.

Question 25

Briefly describe the centerline method for drawing a removed section without a cutting-plane line.