Aircraft Drawings

Question 1

What kind of line shows a center line?

Answer 1

Alternate short and long dashes.

Question 2

Station Number “352” would mean what?

Answer 2

Station numbers is a number used to identify the number of “inches” from the datum, station number 352 would mean 352 inches from the datum is a point on the aircraft.

Question 3

Orthographic Projection can show how many different views?

Answer 3

As many as 6 views.

Question 4

What does a break line look like?

Answer 4

a wavy or a zigzag line used to show that a part has been broken off and only part of it is shown.

Question 5

Hidden line

Answer 5

medium-weight dashed line.

Used to show an edge or object not visible to the viewer.

Question 6

Visible (or object) line

Answer 6

medium solid line

Question 7

Center line

Answer 7

Alternate short and long light dashes

Question 8

Detail drawing

Answer 8

A description of a single part that includes enough information to allow for the part to be manufactured (fabricated).

Question 9

Assembly drawing

Answer 9

a drawing that shows the way various detail parts are put together to form an assembly or a sub-assembly.

Assembly drawings refer to the various parts to be assembled by the drawing number of their detail drawings.

Question 10

Orthographic view

Answer 10

When the drawing shows to object from up to 6 different sides of the part.

Question 11

phantom line

Answer 11

a light line made up of an alternate long dash and two short dashes.

It shows the location of a part that is used as a reference

Question 12

Break line

Answer 12

a wavy or a zigzag line used to show that a part has been broken off and only part of it is shown.

Question 13

Center line

Answer 13

alternating long and short dashes.

They indicate the center of an object or part of an object. Where centerlines cross, the short dashes intersect symmetrically. In the case of very small circles, the centerlines may be shown unbroken.

Question 14

Extension lines

Question 15

Dimension lines

Answer 15

show the dimensions of a line/part

Question 16

Removed section

Answer 16

illustrates particular parts of an object. It is similar to revolved sections, except it is placed at one side and, to bring out pertinent details, often drawn to a larger scale than the main view on which it is indicated.

Question 17

What does blocking in the views accomplish?

Answer 17

it allows you to organize the sketch so it will clearly show the most information

Question 18

14 CFR part 91

Answer 18

Requires that maintenance records contain “a description (or reference to data acceptable to the administrator) of the work performed…”

Question 19

Graph paper is available in what dimmensions?

Answer 19

in either four or five squares to the inch, ruled with light lines.

Question 20

If the exact specifications of a material are shown on the drawing,…

Answer 20

The easily drawn symbol for cast iron is used for the sectioning, and the material specification is listed in the bill of materials or indicated in a note.

Question 21

Cast iron symbol

Answer 21

Repeated single line pattern stretching across the part

Question 22

Rubber, plastic, or electrical insulation symbol

Answer 22

Repeated triple grouped straight lines stretching across the part

Question 23

Steel symbol

Answer 23

Repeated double grouped straight lines stretching across the part

Question 24

Allowances

Answer 24

the difference between the nominal dimension of a part and its upper or lower limit.

Question 25

Dimensions

Answer 25

the measurements used to describe the size of an object. it is the ideal or “perfect” size of the part.

Question 26

Tolerances

Answer 26

the differences between the extreme and allowable dimensions of a part

Question 27

Zone identifiers are placed how often along the edge of the drawing

Answer 27

Every foot along the side of the drawing.

The identifiers along the bottom of the drawing are numbers and those up the side of the drawing are letters.

Question 28

Schematic diagrams show what and do not show what?

Answer 28

They show the functional location of components in relation to one another, but they do not show the physical location or the size and shape of the components

Question 29

Pictorial diagram

Answer 29

Similar to a photograph, a pictorial diagram shows an object as it appears to the eye, but is not satisfactory for showing complex forms and shapes