How many aircraft drawing questions are on the General written?

The FAA does not publish a fixed count per subject area, and drawings is one of the smaller General topics, so expect a handful rather than a block of them. That is still worth the study time, because the questions are pure recall and take seconds each once the conventions are learned. Our General bank has a set of published questions tagged to AM.I.B that you can work straight through in a sitting.

What is the difference between the title block and the revision block?

The title block identifies the drawing itself: its name and number, the scale used, the date, the drafter, and the approval signatures. It normally sits in the lower right corner of the sheet. The revision block is separate and records the history of the print, listing each change made after the original release with a revision letter or number, the date, and a short description of what changed.

What does SCALE 1:1 mean on an aircraft drawing?

The object is drawn at full size, so one unit on the print equals one unit on the part. A 1:2 notation means the drawing is half size and 2:1 means it is twice size. Never take a dimension by measuring the print, whatever the scale says: prints are reproduced and can stretch or shrink, so the written dimension always governs.

Do I need to read drawings for the oral and practical too?

Yes. Drawings sit in the General section of the ACS, and General subjects are fair game in the oral and practical portions as well as the written. Expect to be handed a print or a wiring schematic and asked to identify a line type, locate a dimension or tolerance, or trace a circuit through the symbols. The written test builds the vocabulary; the practical asks you to apply it.

On an aircraft drawing, what is the purpose of the title block?

To identify the drawing by number, name, scale, and date

To list every revision ever made to the drawing

To show the bill of materials for the assembly

A centerline on an aircraft drawing is drawn as a:

Line of alternating long and short dashes

Line of evenly spaced short dashes

When a drawing is labeled "SCALE 1:1," the object shown is drawn:

The same size as the actual part

On an engineering drawing, a tolerance on a dimension is indicated

by a plus and minus sign preceding the permitted variation values.

by enclosing the permitted variation within a triangular symbol.

by the prefix 'TOL' followed by the permitted variation value.

A blueprint dimension is given as 4.387 inches +0.005 / -0.002. Which statement is true?

The minimum acceptable size is 4.385 inches.

The maximum acceptable size is 4.385 inches.

The maximum acceptable size is 4.389 inches.

On an aircraft drawing, the tolerance of a dimension is

the allowable variation from a specified dimension.

the difference between the hole size and the shaft size.

the difference between a worn tool and a new tool.

When a design change is incorporated on a drawing, the drawing must be

assigned a new revision number and date.

left unchanged in both revision number and date.

kept at its old revision number, with only the date noted.

On engineering drawings, drawing numbers are

reissued (changed) after each revision.

identical to the part numbers shown.

An engineering drawing has a scale shown as 1:4. This indicates that the drawing is

reduced to one-quarter of full size.

enlarged to four times full size.

In the title block of an aircraft drawing, what information is provided by the drawing (or dash) number?

It identifies the drawing for filing and reference purposes

It specifies the material from which the part is made

It gives the maximum operating temperature of the part

What is the primary purpose of an exploded-view drawing?

To show the relationship of parts and how they fit together for assembly or disassembly

To show the electrical wiring path between components

To show the finished outer appearance of the assembled unit only

On a drawing, a centerline is typically drawn as which type of line?

A thin line of alternating long and short dashes

A heavy, continuous unbroken line

A series of short, evenly spaced dashes

On an aircraft drawing, hidden edges or features that cannot be seen in a particular view are represented by what type of line?

Two short dashes alternating with one long dash

Alternating long and short dashes

What does a sectional view (section) on an aircraft drawing show?

The internal construction of a part as if it were cut through

The exterior surface finish requirements only

The electrical continuity of the wiring

When a working drawing is changed after it has been released, how is the change normally recorded on the drawing?

It is entered in the revision block

It is added to the zone numbers along the border

It is noted only in the bill of materials

What is the primary purpose of the bill of materials on an assembly drawing?

To list the parts, quantities, and materials required to build the assembly

To provide the scale and projection method used

To record all engineering changes made to the drawing

When a dimension on a drawing is followed by the abbreviation 'TYP', what does it indicate?

The dimension is typical and applies to all similar features

The dimension applies only to that single feature

The dimension is a tolerance that may be exceeded

On a drawing, what is the function of a leader line?

To connect a note or dimension to the feature it refers to

To represent an edge that is hidden from view

To indicate a surface that has been cut in section

A drawing that is made to a scale of 1:1 (full scale) means that the object is drawn how?

The same size as the actual object

Twice the size of the actual object

Half the size of the actual object

Phantom lines on a drawing are used to indicate which of the following?

Alternate positions of moving parts or adjacent related parts

The visible outline of the object

The surface that has been cut in a section view

An installation drawing includes what kind of information?

The information needed to install a part in its proper position

The internal cross-section of a single bolt

The electrical schematic of the entire aircraft

When the abbreviation 'DIA' appears on a drawing, what does it specify?

The diameter of a circular feature

What distinguishes a detail drawing from an assembly drawing?

A detail drawing describes a single part; an assembly drawing shows several parts fitted together

A detail drawing has no title block; an assembly drawing always does

A detail drawing is always full scale; an assembly drawing is never to scale

Aircraft Drawings — FAA A&P Test Questions (ACS AM.I.B)

Aircraft Drawings is a small General subject area with an outsized return, because nearly every question is straight recall. You are asked what the title block holds, which line style means a hidden edge and which means a centerline, what SCALE 1:1 tells you, and which drawing type shows a system's function rather than the real shape of its parts. There is no math and nothing to reason out. You either recognize the convention or you do not, which makes this the cheapest set of points on the General written and the fastest area to take to full marks.

Written by the AMTprep editorial team · Published July 27, 2026 · Last reviewed October 21, 2026

Written against the FAA primary sources cited at the foot of this page.

What ACS AM.I.B covers

The bank for this area follows the drawings chapter of FAA-H-8083-30 closely, and the questions fall into four families. Sheet anatomy comes first: the title block that identifies the drawing by name, number, scale and date and carries the drafting and approval signatures; the revision block that records every change made after original release; the bill of material; and the notes and tolerance blocks. Line conventions come second and produce the largest share of items: visible or object lines, hidden lines, centerlines, extension and dimension lines, phantom lines, break lines, cutting-plane lines and section lining. Expect stems that describe a line in words and ask you to name it, or that name a line and ask what it represents. Drawing types are third: detail, assembly and installation drawings, sectional or cutaway views that expose internal construction, exploded views, and the schematic and block diagrams used for electrical, hydraulic and pneumatic systems. Reproduction methods and scale notation round the area out, including the original blueprint process that passes light through a translucent tracing onto sensitized paper to give white lines on a blue background, and scale statements such as 1:1 for full size or 1:2 for half size. Nothing here requires interpretation of a specific aircraft. It is a vocabulary and convention test, and the correct answer is the one that matches the standard drafting definition given in FAA-H-8083-30.

Where this sits on the test

ACS AM.I.B is tested on the FAA General written test, one of 1,553 ACS-tagged questions in the General bank. Every question tagged to this area carries a worked rationale and its FAA handbook reference, so you can drill the code itself rather than the whole test.

FAA handbook references

FAA-H-8083-30

Three traps candidates fall into

The word blueprint has drifted into meaning any drawing, but the test uses it literally: light passed through a tracing onto sensitized paper, giving white lines on a blue background. Modern reproductions are dark lines on white paper. Read the stem for the color reversal rather than the word itself.
Hidden lines and centerlines are both broken lines and get swapped constantly. A hidden line is a series of short dashes of even length showing an edge you cannot see from that view. A centerline alternates long and short dashes and marks symmetry or the axis of a hole. Even dashes means hidden; alternating means center.
A schematic shows what a system does and in what order, using standard symbols; it deliberately ignores the real shape, size and location of the components. Candidates picture the actual hydraulic bay and pick the answer about relative position, which describes an installation drawing instead.

39 free sample questions from ACS AM.I.B

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On an aircraft drawing, what is the purpose of the title block?
Show the answer and explanation
Answer: To identify the drawing by number, name, scale, and date
Why: The title block is normally located in the lower right corner of a drawing and contains the drawing number, the name of the part or assembly, the scale, the drafting date, and the name of the firm. It identifies the drawing so it can be filed and retrieved. The list of changes belongs in the revision block, and parts are listed in the bill of materials, not the title block.· FAA-H-8083-30 — Aircraft Drawings (title block)
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A drawing prepared by passing light through a tracing onto sensitized paper, producing white lines on a blue background, is called a:
Show the answer and explanation
Answer: Blueprint
Why: The term blueprint comes from the original reproduction process that produced white lines on a blue background. The handbook notes that although modern copies are often black-on-white, the term blueprint is still used for working drawings. A schematic shows function rather than physical form, and a pictorial gives a three-dimensional view, so neither describes the reproduction process.· FAA-H-8083-30 — Aircraft Drawings (blueprints)
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On an aircraft drawing, a hidden line (a line that is out of view) is represented by a:
Show the answer and explanation
Answer: Series of short dashes
Why: Hidden lines represent edges and surfaces that are not visible from the viewing direction and are drawn as a series of short evenly spaced dashes. A heavy solid line is a visible (object) line, and a line of alternating long dashes and dots is a centerline. Recognizing line conventions is essential to reading a drawing correctly.· FAA-H-8083-30 — Aircraft Drawings (lines and their meanings)
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A centerline on an aircraft drawing is drawn as a:
Show the answer and explanation
Answer: Line of alternating long and short dashes
Why: A centerline indicates the center of a symmetrical object or hole and is drawn as alternating long and short dashes. Evenly spaced short dashes form a hidden line, and a thin continuous line is typically a dimension or extension line. Correct identification of line types prevents misreading the geometry of a part.· FAA-H-8083-30 — Aircraft Drawings (lines and their meanings)
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When a drawing is labeled "SCALE 1:1," the object shown is drawn:
Show the answer and explanation
Answer: The same size as the actual part
Why: A scale of 1:1 means the drawing is the same size as the actual object. A reduced scale such as 1:2 would show the part at half size, and an enlarged scale such as 2:1 would show it at twice size. The mechanic should still take dimensions from the figures given, never by measuring the drawing.· FAA-H-8083-30 — Aircraft Drawings (scale)
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Which drawing uses symbols and lines to show the function and sequence of an electrical or fluid system without depicting actual part shapes?
Show the answer and explanation
Answer: Schematic diagram
Why: A schematic diagram uses standardized symbols to show how a system functions and how components are connected, without regard to their physical size, shape, or location. It is widely used for electrical and hydraulic systems. A detail drawing depicts a single part's actual form, and a sectional view shows internal structure, so neither emphasizes system function.· FAA-H-8083-30 — Aircraft Drawings (schematic diagrams)
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The area of a drawing that records all changes made to the drawing after its original release is the:
Show the answer and explanation
Answer: Revision block
Why: The revision block, usually in the upper right corner, lists each change to the drawing along with a revision letter or number and date. This lets the user confirm the drawing is current. The title block identifies the drawing, and the bill of materials lists the parts and quantities, so neither tracks changes.· FAA-H-8083-30 — Aircraft Drawings (revision block)
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A drawing that shows a cutaway portion of an object to reveal its internal construction is called a:
Show the answer and explanation
Answer: Sectional view
Why: A sectional view, or section, shows the part as if it were cut through, exposing interior features that hidden lines alone would make hard to follow. The cut surface is identified with section (cross-hatch) lines. An orthographic view shows external faces straight on, and a perspective view is pictorial, so neither exposes internal structure.· FAA-H-8083-30 — Aircraft Drawings (sectional views)
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On a sectional view, the surface that has been cut by the cutting plane is identified by:
Show the answer and explanation
Answer: Section (cross-hatch) lines
Why: Section lines, drawn as evenly spaced diagonal cross-hatching, indicate the solid material that the cutting plane passed through; their pattern can also suggest the type of material. Evenly spaced dashes are hidden lines, and long-and-short dashes form a centerline, so neither marks the cut surface.· FAA-H-8083-30 — Aircraft Drawings (section lines)
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In the standard orthographic (three-view) drawing arrangement, the top view is normally placed:
Show the answer and explanation
Answer: Directly above the front view
Why: In third-angle orthographic projection used on U.S. aircraft drawings, the front view is the reference, the top view is placed directly above it, and the right-side view is placed to its right, keeping aligned features in line. Placing the top view below or to the left would not match this standard arrangement, so those choices are incorrect.· FAA-H-8083-30 — Aircraft Drawings (orthographic projection)
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The total permissible variation of a dimension, that is the difference between its high and low limits of size, is called the
Show the answer and explanation
Answer: tolerance.
Why: Tolerance is defined as the total permissible variation of a dimension — the difference between its maximum and minimum limits of size. Deviation describes the departure of a limit from the basic size, and fit describes the relationship between mating parts, so tolerance is the correct term, per FAA-H-8083-30 aircraft drawings.· FAA-H-8083-30 — Aircraft Drawings
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A dimension specified as 1 in. +0.002 / −0.001 is an example of what type of tolerance?
Show the answer and explanation
Answer: Bilateral
Why: A tolerance expressed as both a plus and a minus value from the nominal size — here +0.002 and −0.001 — allows variation on both sides of the basic dimension and is therefore bilateral. A unilateral tolerance permits variation in one direction only, with the other limit at the nominal size, per FAA-H-8083-30 aircraft drawings.· FAA-H-8083-30 — Aircraft Drawings
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On an engineering drawing, a tolerance on a dimension is indicated
Show the answer and explanation
Answer: by a plus and minus sign preceding the permitted variation values.
Why: On an engineering drawing a tolerance is shown by placing plus and minus signs before the permitted variation values applied to the nominal dimension, defining the upper and lower limits of size. There is no standard 'TOL' prefix or triangular tolerance symbol used for this purpose, per FAA-H-8083-30 aircraft drawings.· FAA-H-8083-30 — Aircraft Drawings
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A blueprint dimension is given as 4.387 inches +0.005 / -0.002. Which statement is true?
Show the answer and explanation
Answer: The minimum acceptable size is 4.385 inches.
Why: The dimension 4.387 inches with a tolerance of +0.005 / -0.002 gives a maximum acceptable size of 4.387 + 0.005 = 4.392 inches and a minimum of 4.387 - 0.002 = 4.385 inches. Therefore 4.385 inches is the smallest acceptable size, and the upper limit is 4.392 inches, not 4.389 inches.· FAA-H-8083-30 — Aircraft Drawings
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On an aircraft drawing, the tolerance of a dimension is
Show the answer and explanation
Answer: the allowable variation from a specified dimension.
Why: Tolerance is the total permissible variation on a dimension — the allowable amount that workmanship and tooling may deviate while the part remains acceptable. It is the spread between the upper and lower limits of a single feature, not the relationship between a hole and a shaft, which is the fit or allowance.· FAA-H-8083-30 — Aircraft Drawings
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On an engineering drawing, a visible outline of a part is shown as a
Show the answer and explanation
Answer: thick continuous line.
Why: On engineering drawings a visible outline is drawn as a thick (heavy) continuous line so the part outline stands out clearly. Thinner continuous and dashed lines are used for dimension, extension, projection, and hidden-detail features, not the visible outline. (FAA-H-8083-30, Aircraft Drawings — types of lines.)· FAA-H-8083-30 — Aircraft Drawings
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Which pictorial drawing shows one face in true elevation, with the depth lines drawn at 30 or 45 degrees to the horizontal?
Show the answer and explanation
Answer: Oblique projection.
Why: An oblique projection draws one face flat-on in true elevation, so that face is shown undistorted, while the depth lines are projected back at a constant angle, typically 30 or 45 degrees, to the horizontal. An isometric drawing uses three equal axes at 30 degrees and shows no true face, and a perspective drawing uses converging lines, so neither matches this description. (FAA-H-8083-30, Aircraft Drawings — pictorial drawings.)· FAA-H-8083-30 — Aircraft Drawings
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When a design change is incorporated on a drawing, the drawing must be
Show the answer and explanation
Answer: assigned a new revision number and date.
Why: Drawing control requires that any design change raise the revision (issue) number and record the new date, giving full traceability of which configuration is current and which is superseded. Keeping the old revision number would let two different designs share one identity, and making no change at all defeats configuration control entirely. (FAA-H-8083-30, Aircraft Drawings — title blocks and revision control.)· FAA-H-8083-30 — Aircraft Drawings
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On engineering drawings, drawing numbers are
Show the answer and explanation
Answer: unique to each drawing.
Why: Each drawing carries its own unique drawing number so that any single drawing can be identified and called up without ambiguity. The number is not changed at each revision (the revision number tracks revisions instead), and it is not the same as a part number, since one drawing may define several parts. (FAA-H-8083-30, Aircraft Drawings — drawing numbers and title blocks.)· FAA-H-8083-30 — Aircraft Drawings
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On a sectional view of a drawing, section (hatching) lines are conventionally drawn at
Show the answer and explanation
Answer: 45 degrees.
Why: Section (cross-hatching) lines are conventionally drawn as thin lines at 45 degrees to the main outline so the cut material is clearly distinguished from the surrounding view. The 30 and 60 degree angles are not the standard hatching angle and are used only to avoid confusion when a feature itself lies at 45 degrees. (FAA-H-8083-30, Aircraft Drawings — sectional views.)· FAA-H-8083-30 — Aircraft Drawings
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An engineering drawing has a scale shown as 1:4. This indicates that the drawing is
Show the answer and explanation
Answer: reduced to one-quarter of full size.
Why: A scale stated as 1:4 means one unit on the drawing represents four units on the real object, so the drawing is reduced to one-quarter of full size. Full scale would be 1:1, and four times full size would be written 4:1, so those options reverse the meaning of the ratio. (FAA-H-8083-30, Aircraft Drawings — drawing scales.)· FAA-H-8083-30 — Aircraft Drawings
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On an orthographic projection drawing of an object, how many principal views are theoretically possible?
Show the answer and explanation
Answer: Six
Why: FAA-H-8083-30 explains that orthographic projection can show up to six principal views of an object (front, top, bottom, left side, right side, and rear), though most drawings use only the views necessary to fully describe the part.· FAA-H-8083-30 — Aircraft Drawings
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Which type of drawing uses standardized graphic symbols to show the electrical connections and functions of a circuit without regard to the physical size or location of the components?
Show the answer and explanation
Answer: A schematic diagram
Why: FAA-H-8083-30 describes a schematic diagram as one that uses symbols to represent components and shows the function and relationship of circuit parts, but does not indicate the actual physical size, shape, or location of the components.· FAA-H-8083-30 — Aircraft Drawings
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In the title block of an aircraft drawing, what information is provided by the drawing (or dash) number?
Show the answer and explanation
Answer: It identifies the drawing for filing and reference purposes
Why: FAA-H-8083-30 states that the drawing number, located in the title block, is used to identify and control the drawing; it is the number by which the drawing is filed and identified, and dash numbers identify right- and left-hand parts or detail parts shown on the drawing.· FAA-H-8083-30 — Aircraft Drawings
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What is the primary purpose of an exploded-view drawing?
Show the answer and explanation
Answer: To show the relationship of parts and how they fit together for assembly or disassembly
Why: FAA-H-8083-30 explains that an exploded-view (or detail-assembly) drawing shows the individual parts of an assembly separated but arranged in their relative working positions, which is useful for identifying parts and showing how they fit together during assembly or disassembly.· FAA-H-8083-30 — Aircraft Drawings
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On a drawing, a centerline is typically drawn as which type of line?
Show the answer and explanation
Answer: A thin line of alternating long and short dashes
Why: FAA-H-8083-30 identifies the centerline as a thin line made up of alternating long and short dashes, used to indicate the center of an object, hole, or symmetrical feature.· FAA-H-8083-30 — Aircraft Drawings
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On an aircraft drawing, hidden edges or features that cannot be seen in a particular view are represented by what type of line?
Show the answer and explanation
Answer: Short, evenly spaced dashes
Why: FAA-H-8083-30 states that hidden lines are made up of short, evenly spaced dashes and are used to show the edges, surfaces, or features of an object that are not visible in that view.· FAA-H-8083-30 — Aircraft Drawings
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What does a sectional view (section) on an aircraft drawing show?
Show the answer and explanation
Answer: The internal construction of a part as if it were cut through
Why: FAA-H-8083-30 explains that a sectional view is used to show the internal construction or interior details of a part by depicting it as though it had been cut through along a cutting plane; section (crosshatch) lines indicate the surface that was cut.· FAA-H-8083-30 — Aircraft Drawings
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When a working drawing is changed after it has been released, how is the change normally recorded on the drawing?
Show the answer and explanation
Answer: It is entered in the revision block
Why: FAA-H-8083-30 explains that changes to a drawing are recorded in the revision block, which lists the revision letter or number, a description of the change, the date, and approval, so that the latest configuration of the drawing can be identified.· FAA-H-8083-30 — Aircraft Drawings
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What is the primary purpose of the bill of materials on an assembly drawing?
Show the answer and explanation
Answer: To list the parts, quantities, and materials required to build the assembly
Why: FAA-H-8083-30 describes the bill of materials as a list that includes the part numbers, nomenclature, quantity required, and material of the parts shown on the drawing, allowing the technician to identify and order the correct components.· FAA-H-8083-30 — Aircraft Drawings
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When a dimension on a drawing is followed by the abbreviation 'TYP', what does it indicate?
Show the answer and explanation
Answer: The dimension is typical and applies to all similar features
Why: FAA-H-8083-30 lists common drawing abbreviations and notes that 'TYP' means typical, indicating that a dimension or feature is repeated and applies to all similar features even though it is shown or dimensioned only once.· FAA-H-8083-30 — Aircraft Drawings
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On a drawing, what is the function of a leader line?
Show the answer and explanation
Answer: To connect a note or dimension to the feature it refers to
Why: FAA-H-8083-30 explains that a leader line is a thin line, usually terminating in an arrowhead, used to connect a note, dimension, or number to a particular feature or area on the drawing.· FAA-H-8083-30 — Aircraft Drawings
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A drawing that is made to a scale of 1:1 (full scale) means that the object is drawn how?
Show the answer and explanation
Answer: The same size as the actual object
Why: FAA-H-8083-30 explains that the scale of a drawing indicates the ratio of the drawing size to the actual object size; a scale of 1:1 (full scale) means the object is drawn the same size as the actual part.· FAA-H-8083-30 — Aircraft Drawings
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Which type of pictorial drawing represents an object with all three principal faces inclined equally to the plane of projection, so the lines along the three axes are drawn 120 degrees apart?
Show the answer and explanation
Answer: Isometric drawing
Why: FAA-H-8083-30 describes isometric drawings as a form of pictorial drawing in which the object is positioned so that its three axes make equal angles (120 degrees) with each other, giving a realistic three-dimensional representation.· FAA-H-8083-30 — Aircraft Drawings
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Phantom lines on a drawing are used to indicate which of the following?
Show the answer and explanation
Answer: Alternate positions of moving parts or adjacent related parts
Why: FAA-H-8083-30 explains that phantom lines, consisting of one long dash alternating with two short dashes, are used to indicate alternate positions of moving parts, adjacent positions of related parts, or repeated detail.· FAA-H-8083-30 — Aircraft Drawings
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An installation drawing includes what kind of information?
Show the answer and explanation
Answer: The information needed to install a part in its proper position
Why: FAA-H-8083-30 describes an installation drawing as one that includes all the dimensions and information necessary to install a part or assembly in its proper position relative to the rest of the structure or aircraft.· FAA-H-8083-30 — Aircraft Drawings
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When the abbreviation 'DIA' appears on a drawing, what does it specify?
Show the answer and explanation
Answer: The diameter of a circular feature
Why: FAA-H-8083-30 lists standard drawing abbreviations and notes that 'DIA' stands for diameter, indicating that the associated dimension is the diameter of a circular feature such as a hole or shaft.· FAA-H-8083-30 — Aircraft Drawings
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What distinguishes a detail drawing from an assembly drawing?
Show the answer and explanation
Answer: A detail drawing describes a single part; an assembly drawing shows several parts fitted together
Why: FAA-H-8083-30 explains that a detail drawing provides the dimensions, material, and other information needed to manufacture a single part, while an assembly drawing shows how several parts fit together to form an assembly.· FAA-H-8083-30 — Aircraft Drawings
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A diagram that shows the routing and connections of wires and the physical location of electrical components, used as an aid to tracing circuits during maintenance, is best described as which of the following?
Show the answer and explanation
Answer: A wiring diagram
Why: FAA-H-8083-30 distinguishes a wiring diagram, which shows the actual connections and physical arrangement of wires and components for maintenance and troubleshooting, from a schematic, which emphasizes function using symbols without regard to physical layout.· FAA-H-8083-30 — Aircraft Drawings

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Frequently asked questions

How many aircraft drawing questions are on the General written?: The FAA does not publish a fixed count per subject area, and drawings is one of the smaller General topics, so expect a handful rather than a block of them. That is still worth the study time, because the questions are pure recall and take seconds each once the conventions are learned. Our General bank has a set of published questions tagged to AM.I.B that you can work straight through in a sitting.
What is the difference between the title block and the revision block?: The title block identifies the drawing itself: its name and number, the scale used, the date, the drafter, and the approval signatures. It normally sits in the lower right corner of the sheet. The revision block is separate and records the history of the print, listing each change made after the original release with a revision letter or number, the date, and a short description of what changed.
What does SCALE 1:1 mean on an aircraft drawing?: The object is drawn at full size, so one unit on the print equals one unit on the part. A 1:2 notation means the drawing is half size and 2:1 means it is twice size. Never take a dimension by measuring the print, whatever the scale says: prints are reproduced and can stretch or shrink, so the written dimension always governs.
Do I need to read drawings for the oral and practical too?: Yes. Drawings sit in the General section of the ACS, and General subjects are fair game in the oral and practical portions as well as the written. Expect to be handed a print or a wiring schematic and asked to identify a line type, locate a dimension or tolerance, or trace a circuit through the symbols. The written test builds the vocabulary; the practical asks you to apply it.

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