When drawing auxiliary views, this type of line is used to indicate that the view is incomplete.
What is a break line?
100
This is on the right side of a drawing's measurement scale.
What is the measurement on the actual part?
100
In this style of dimensioning, notes and horizontal dimensions are read from the bottom of the page while vertical dimensions are read from the right side of the page.
What is aligned?
100
The absence of unit abbreviations or symbols, such as "in" or "mm," indicates what type of drawing?
What is a machine drawing?
100
This is defined as "driven gear teeth" divided by "driving gear teeth."
What is gear ratio?
200
When an inclined surface is represented as a foreshortened view, an auxiliary view can be used to indicate this feature of the surface.
What is the true size and shape?
200
This scale is based on multiples of ten.
What is the civil engineering scale?
200
These are two thin solid lines terminating in arrowheads with a dimension placed between.
What are dimension lines?
200
When possible, dimensioning to these lines should be avoided.
What are hidden lines?
200
This is a gear wheel with rounded teeth.
What is a spur gear?
300
This is created by "cutting away" part of the object in order to expose internal details.
What is a sectional view?
300
This is on the left side of a drawing scale.
What is the measurement on the drawing?
300
This is abbreviated "ANSI."
What is the American National Standards Institute?
300
This is a thin long-dash-long line used to locate the center of a geometric feature or indicate symmetry of a geometric feature.
What is a center line?
300
This reduces the amount of effort necessary to exert a force and overcome a resistance.
What is mechanical advantage?
400
Machine drawings use this symbol or surface to represent all sectional surfaces.
What is cast iron (ANSI 31)?
400
This should NEVER be done on a drawing.
What is measure on a drawing?
400
Placed in front of a decimal, a "leading zero" on a machine drawing indicates this system of units.
What is metric?
400
By dimensioning from shortest-to-longest dimension, one can avoid having these lines cross on a drawing.
What are dimension and extension lines?
400
This is used to maintain tension on a pulley belt?
What is an idler pulley?
500
This is a type of full section where the cutting plane includes 90 degree bends in order to pass through a number of important details.
What is an offset section?
500
This scale uses the foot as the base unit, for example 3'-6"
What is an architectural scale?
500
These are a pair of thin solid lines extending from the geometric feature on the object to slight beyond the dimension line.
What are extension lines?
500
This is a thin solid line beginning with a short horizontal line then extending on an angled line until it touches the object; it sometimes terminates in an arrowhead touching the object.
What is a leader line?
500
This is the gap between meshed gear teeth upon the start of rotation.