SECTIONAL VIEWS
What is the drafting method used to show a small, specific internal feature without drawing a full separate view, whose boundary is a short break line?
What is a Broken-Out Section?
In the Unified callout 1/4-20 UNC-2A, what does the 'A' indicate?
What is an External Thread (like a bolt or screw)?
What is the ANSI-preferred text orientation system where all text reads from the bottom of the sheet?
What is Unidirectional Dimensioning?
What is the chief advantage of Datum Dimensioning over Chain Dimensioning?
What is it prevents tolerance stack-up?
This is the most common drawing method—using dashed and solid lines to indicate Major and Minor diameter—because it is the fastest to draw.
What is Simplified Representation?
This thick phantom line must have arrows pointing in the direction of sight to indicate which part of the cut object is being viewed.
What is the Cutting-Plane Line?
This is the term for the distance from one thread to the next, which is written in millimeters in a metric callout.
What is the Pitch?
In U.S. (Inch) dimensioning, what must follow a whole number like 12 to show precision?
What is a decimal point and at least one trailing zero (e.g., 12.0)?
A Datum is defined as a theoretically exact surface, plane, axis, or point used to establish this.
What is the origin (or reference point)?
What is the type of thread identified by the letters UNF?
What is Unified National Fine?
If a cutting plane must stagger or be stepped to pass through non-aligned features on an object, you should use this type of section.
What is an Offset Section?
In the metric callout M10 x 1.5 - 6g, the lowercase 'g' tells you that the thread is this type.
What is an External Thread (or a bolt)?
The term for the process where all dimension errors combine and worsen with each measurement in a series.
What is Tolerance Stack-Up?
When placing a Datum Feature Symbol on a flat plane, the symbol should be placed on the edge view or this line type coming from the surface.
What is an Extension Line?
The Major Diameter of a thread is also known as this, which is the first component listed in both Unified and Metric callouts.
What is the largest diameter of a screw thread?
This type of section is used for symmetrical, circular parts, where a feature is rotated into the cutting plane line to show its true size and location.
What is an Aligned Section?
What does the number '20' represent in the callout 1/4-20 UNC-2A?
What is Threads Per Inch (TPI)?
When writing a metric decimal dimension less than 1mm, the rule states you must do this.
What is always adding a leading zero? (e.g., 0.75)
According to the placement rules for a Center Axis datum, the symbol must be placed on the feature itself or this specific line.
What is the dimension leader line.
If a Unified callout lacks LH in the last position, it automatically means the thread has this direction.
What is Right-Hand (RH)?
According to the Golden Rules, it is considered poor practice to do this to a sectional view when using it to establish another view.
What is putting another cutting-plane line in a section view? (Or, "taking a section from a section.")
What thread types are identified by their uppercase tolerance positions i.e. G or H?
What are Internal Threads (Hole or Nut)?
When using Dual Dimensioning, what is the rule regarding the placement of the primary design unit?
What is the Primary design unit must be listed first or on top?
What two geometric types of features define the origin when establishing Datum A, Datum B, and Datum C?
What are Surfaces and Axes (or Planes)?
While the Simplified method is the fastest way to draw a thread, the thread's size, pitch, and class of fit are only fully communicated by this element on the drawing.
What is the Thread Note (or Thread Callout)?