7.5: Engineering Drawings, Diagrams and Standards Flashcards
Solution treated and precipitated
Must be accompanied by the new issue number and date
P.C.D is an abbreviation for:
(a) Pitch Circle Diameter
(b) Pitch Cord Diameter
(c) Precision Circle Dimension
(a) Pitch Circle Diameter
'’The diameter of a circle which is dictated by the pitch of a number of rivets of a given size. This is used to determine the diameter of circular repairs’’
squared shaft
What does this mean?
What does this mean?
What does this mean?
What does this mean?
What does this mean?
What does this mean?
What does this mean?
What does this symbol mean?
What does this symbol mean?
Drawing numbers are
(a) The same as serial numbers
(b) Changed after each drawing amended after May 28, 1999.
(c) Unique to each drawing
(c) Unique to each drawing
'’Drawing number could be part number and is unique - only one drawing number’’
What is the application of each of these lines?
drawn to a quarter real size
'’Scale 2:1 = twice the size
1:2, scale is 1/2 size of actual’’
Scale Drawing:Actual
Concentricity
What do the following symbols mean?
General Arrangement
Drawings of the ‘general arrangement’ of the aircraft and of the main assemblies and systems are provided. These drawings usually contain overall profile particulars only, with locations and references of the associated main assembly and installation drawings; they may also provide a guide to the identification of drawing groups used by the particular design organisation
Concentricity
45^
'’Where the sectioning has taken place, the cut or broken surface is highlighted by thin parallel lines (hatching) which are normally drawn at an angle of 45^ to the axis of the part. In all views that show the sectioning of the same part, the hatched lines will be the same, both in direction and spacing.’’
angularity
What are the following types of ‘orthographic projections’?
0.7 mm
Fill in the missing dimensions
the drawing is ten times full size
where it would be inconvenient (because of limited space) to draw long lengths of the same section
Interrupted views:
To save space, only for those portions of a large or long object which are sufficient to define it need to be shown, drawn close to each other.
The break line conventions are illustrated here
It should be noted that the break lines for large components and sheet material in continue for a short distance beyond the outline.
The break lines used in may also be used on sectional views
Flatness
position
the minimum number of dimensions necessary to enable the component to be manufactured
An internal thread
How can you tell the difference between an external and internal screw thread on by circular convention symbol?
three or four, two-dimensional views of an object
'’Since no single view of an engineering part will show the details of every important feature, a complete engineering drawing necessarily appears as two, three, or more individual drawings, each one showing how the part looks when viewed from a different angle. This is made possible by using one of two methods of ‘orthographic’ projection known respectively as first angle and third angle projection’’
An oblique projection
(a) is the same as an isometric projection
(b) has one view looking directly at one face with the lines representing depth drawn at 90^
(c) has one view looking directly at one face with the lines representing depth drawn at a constant angle
(c) has one view looking directly at one face with the lines representing depth drawn at a constant angle
an installation drawing
'’The installation drawings show how and where the components and assemblies produced by the other drawings are fitted to the aircraft. They contain specific location, alignment and attachment information together with details of any materials or processes which must be used’’
What is a Detail drawing?
Detail Drawing (sometimes known as single part drawing)
This is the type of drawing prepared for each individual item required to be made. It contains all the necessary information needed for its manufacture
What is a collective drawing?
Collective drawing
This is a detail drawing used to illustrate a range of similar parts or assemblies which differ in one or more details (usually dimensional). A list detailing these differences must be included.
What is an Assembly or construction drawing?
Assembly or construction drawing:
This type of drawing indicates how the individual parts of an assembly are put together. Each part is identified by a number and all the information about the items is usually listed on a parts list which is either included on the actual drawing or separately on another sheet’’
What is a combined drawing?
Combined drawing
A combined drawing shows on one sheet of paper each individual part drawn separately, together with an assembly and/or installation drawing and a parts list.
Not to scale
direction of fluid flow through the system
Schematic diagrams
Schematic diagrams can be found in maintenance manuals to represent and give information on aircraft systems such as electrical, hydraulic, pneumatic, lubrication, air-conditioning, and pressurisation, and to provide details for engine and (where applicable) propeller operation.
Coloured diagrams are not used in maintenance manuals, but a system of hatching and shading is normally used to indicate how the system functions.
A typical schematic diagram, is used to give an overview of the complete aircraft system so that maintenance and diagnosis can be initiated.
One-view, two-view, and three-view drawings are the most common
Note: eight view is impossible as max viewable sides is 6
hidden line
What is a break line?
Interrupted views
To save space, only those portions of a large or long object which are sufficient to define it need to be shown, drawn close to each other.
The break line conventios are illustrated here.
It should be noted that the break lines for large components and sheet material in continue for a short distance beyond the outline
The break lines used in may also be used on sectional views
functional location of components within a system
Schematic diagrams
Schematic diagrams can be found in maintenance manuals to represent and give information on aircraft systems such as electrical, hydraulic, pneumatic, lubrication, air-conditioning, and pressurisation, and to provide details for engine and (where applicable) propeller operation.
A typical schematic diagram, is used to give an overview of the complete aircraft system so that maintenance and diagnosis can be initiated.
round bar
Medium-weight dashed line
Station number
A station number is a number used to identify the number of inches from the datum or other point identified by the manufacturer to a point in or on the aircraft
Note: Zone number is major aircraft zones such as 500 for left wing, 600 right wing, 700 landing gear and landing gear doors and 800 for doors
below the front elevation
Note: The plan view is basically a view from the top or top view
When a cutting plane on a drawing cuts a web longitudinally, the web is:
(a) sectioned the same as the rest of the view
(b) not sectioned
(c) sectioned with different direction of hatch
(b) not sectioned
When a cutting plane goes through a bush and bolt assembly, on the sectioned view:
(a) both the bush and the bolt will be hatched
(b) the bush will be hatched but the bolt will not
( c) neither the bush nor the bolt will be hatched
the bush will be hatched but the bolt will not
'’To avoid confusion, where two or more adjacent parts are sectioned, the hatching will be drawn in different directions or to a different spacing. Common parts such as bolts, nuts, rivets, pins and similar items are not sectioned or hatched but shown in outline only’’
Machining is required on a particular surface
Identify the following symbols
A broken line as shown in 2
issue number
'’Change to a design drawing, except for minor clerical corrections, is usually accompanied by a new issue number and date’’
Convention C
BS8888
Four signatures for Stressed by, Checked by, Approved by Drawn by
False
Never
-Have to get on to engineering - CAMO -Manufacturer
A single sided, three dimensional view of the object
A two dimensional view of a single side of an object
The depth of the object viewed at 45 or 60 degrees
The object
Only the affected area of a larger object to save space on the drawing
A center line
The IPC
False
Drawings of the ‘general arrangement’ of the aircraft and of the main assemblies and systems are provided. These drawings usually contain overall profile particulars only, with locations and references of the associated main assembly and installation drawings; they may also provide a guide to the identification of drawing groups used by the particular design organisation.
Note: An installation drawing shows where to fit an assembly on an aircraft
Shown only once
The range between the upper and lower limit of the objects finished dimension
Note: If dimension is 2 +- 0.001’’
The tolerance is 0.002’’
True
To enable interchangeability
What is the most common form of orthographic projection in Europe?
Common form of orthographic projection in Europe is 1st angle
What happens if a change is made to a technical drawing?
Change made to a technical drawing. Gets a new issue number and date
Where does 1st angle projection display its view compared to the viewer?
1st angle projection displays its view at the far side compared to the viewer
What do orthographic projections provide?
Orthographic projections provide a two-dimensional view of a side of the object
What does the following symbol mean?
This symbol found on an engineering drawing means angularity
What do Oblique pictorial projections show?
Oblique pictorial projection shows one face in true elevation and line of depth normally drawn at 30^ or 45^ or 60^ to the horizontal
British standard is______?
British standard is BS 8888
What does this symbol represent?
Squared shaft
What does this symbol represent?
internal thread
What does S.W.G stand for?
S.W.G means Standard Wire Gauge
What does this symbol mean?
Concentricity
What does this symbol mean?
First angle projection
What does this symbol mean?
Position
What does this symbol mean?
flatness
What does this symbol mean?
Solution heat treated and precipitated
Option B: each view represents the side of the object nearest to it in the adjacent view
Option A: drawn to a quarter
Option C: three, two-dimensional views of an object
Option B: Upgrade it to ‘primary’.
Option B: Green
Option A: Highly stressed parts but if damaged will not cause failure of the aircraft
Option B: British Association
Option C: BS 308
Option C: the drawing is ten times full size
Option B: must be accompanied by the new issue number and date
Option C: has one view looking directly at one face with the lines representing depth drawn at a constant angle
Option C: Not To Scale
Option C: direction of fluid flow through the system
Option C: One-view, two-view, and three-view drawings are the most common
Option B: Medium-weight dashed line
Option B: station number
Option C: below the front elevation
Option A: been anodic flaw detected
Option B: Tip of horizontal stabilizer
Zone 3xx is the empennage
Option A: issue number
Identify ATA 100 chapters
What are the following aircraft zones?
100, 200, 300, 400, 500, 600, 700, 800
What does the following symbol mean?
(a) Solution treated and not requiring precipitation
(b) Solution treated and requiring precipitation
(.c) Precipitation treatment
(a) Solution treated and not requiring precipitation
What does the following symbol mean?
(a) Solution treated and not requiring precipitation
(b) Solution treated and requiring precipitation
(.c) Precipitation treatment
(b) Solution treated and requiring precipitation
What does the following symbol mean?
(a) Solution treated and not requiring precipitation
(b) Solution treated and requiring precipitation
(.c) Precipitation treatment
(.c) Precipitation treatment
What does the following mean?
(a) Solution treated and precipitated
(b) Annealed
(.c) Hardened and tempered
(a) Solution treated and precipitated
What does the following mean?
(a) Solution treated and precipitated
(b) Annealed
(.c) Hardened and tempered
(b) Annealed
What does the following mean?
(a) Solution treated and precipitated
(b) Annealed
(.c) Hardened and tempered
(.c) Hardened and tempered
What does the following symbol mean?
(a) Mechanical test
(b) Dye penetrant check
(.c) Ultra-sonic test
(d) Anodic flaw detected
(b) Dye penetrant check
What does the following symbol mean?
(a) Mechanical test
(b) Dye penetrant check
(.c) Ultra-sonic test
(d) Anodic flaw detected
(a) Mechanical test
What does the following symbol mean?
(a) Mechanical test
(b) Dye penetrant check
(.c) Ultra-sonic test
(d) Anodic flaw detected
(.c) Ultra-sonic test
What does the following symbol mean?
(a) Mechanical test
(b) Dye penetrant check
(.c) Ultra-sonic test
(d) Anodic flaw detected
(d) Anodic flaw detected
The number of circuits which can be completed through the poles of a switch is identified by the term: -
(a) toggle
(b) throw
© position
(b) throw
Where is the title block located in Engineering Drawings?
(a) In the upper right hand corner
(b) Always in the lower right hand corner
© Sometimes in the lower right hand corner
(b) Always in the lower right hand corner
How many sets of numbers are there in the ATA 100 Series coding system?
(a) Three
(b) Two
© Six
(a) Three
What does the following symbol mean?
(a) Cleaned (pipes)
(b) Repaired and reconditioned
© Normalised steel parts
(a) Cleaned (pipes)
What does the following symbol mean?
(a) Cleaned (pipes)
(b) Repaired and reconditioned
© Normalised steel parts
(b) Repaired and reconditioned
What does the following symbol mean?
(a) Cleaned (pipes)
(b) Repaired and reconditioned
© Normalised steel parts
© Normalised steel parts
What does the following symbol mean?
(a) Proof loaded
(b) Stress relieved
© Pressure test
(a) Proof loaded
What does the following symbol mean?
(a) Proof loaded
(b) Stress relieved
© Pressure test
(b) Stress relieved
What does the following symbol mean?
(a) Proof loaded
(b) Stress relieved
© Pressure test
(C) Pressure test
What does the following symbol mean?
(a) X-ray flaw detected
(b) Salvaged
(C) Electro-magnetic flaw detection
(a) X-ray flaw detected
What does the following symbol mean?
(a) X-ray flaw detected
(b) Salvaged
(C) Electro-magnetic flaw detection
(b) salvaged
What does the following symbol mean?
(a) X-ray flaw detected
(b) Salvaged
(C) Electro-magnetic flaw detection
(C) Electro-magnetic flaw detection
What does the following symbol mean?
(a) Electro-magnetic flaw detection
(b) Welding
(C) Etch inspection of steel
(b) Welding
What does the following symbol mean?
(a) Electro-magnetic flaw detection
(b) Welding
(C) Etch inspection of steel
(C) Etch inspection of steel
Specifications
It is a record of changes which have already been made to the drawing
triangle, cyclinder, cube, sphere, cone, and circle
potentiometer
a blind tapped hole
issue number is changed
PNP transistor
internal
is provided by an approved organisation
vertical measurements on the fuselage
push-pull circuit breaker
iron core inductor
c) three dimensional, single image of the object
c) third Angle
c) Across Flats
c) the International standardization of maintenance manuals, illustrated parts catalogues, overhaul and repair manuals, service bulletins and letters
ATA 100 specification should give question away - international standrad
Not sure what ‘’iSpec 2200’’ means but irrevelant
b) a permitted variation on a dimension to allow for inaccuracy of equipment
c) the same size as the hole
Also what is deviation? (as mentioned in this q)
a) tolerance
Deviation is the actual difference between the nominal size and the actual physical part
Example, A shaft is made to 1’’ +- 0.005’’ , the tolerance is 10’’ bilateral.
After manufacture, the shaft is 1.003’’, the deviation 0.003’’
c) difference between shaft and hole diameters
a) by a plus and minus sign preceding the permitted tolerance
b) the minimum acceptable size is 4.385 inches
a) 1.228’’
Note: MMC = Max material size
b) 0.002 mm
b) datum
b) vertical measurements on the fuselage
Plane submerged in water, water line where water is on fuselage and then measurements taken above and/or below
b) a rectangle
b) far side from the viewer
c) outside the parts outline
b) Unilateral
c) the hole basis
c) are approved on all sorts of aircraft including commercial
b) can have multiple approved specifications
c) three dimensional, single image of the object
b) two dimensional view of a single side of the object
(a) Chapter 20
(b) Chapter 28
(C) Chapter 29
(C) Chapter 05
(b) Chapter 12
(b) Chapter 20
(b) six digits split into 3 parts separated by dashes
(a) National Aerospace Standard
(b) Society of Automotive Engineers
(a) Four times the actual size
(a) In the upper right hand corner, or adjacent to the title block
c) Front, top, bottom, right side and left side and rear side
(a) Installation Drawing
c) Block Diagram
(a) Block diagrams and schematics
(b) AN, NAS, BS, MS
(a) First Angle
Question should be more clarified - EU first angle / USA third angle
(b) A dashed medium weight line with dashes all of equal length
c) Thin line with alternate long and s
