ME 9 MIDTERM 1 + 2 Questions
swept
A _____ feature creates a boss or cut by moving a profile along a path.
shell
A ______ feature removes most of the interior volume of a solid model, leaving a relatively thin wall of material that closely conforms to the outer surfaces of the original model
broken-out section
A _______ can be used when the internal feature to be revealed is a small portion of the entire object and a full section would not reveal additional details of interest
chamfer
A ________ is an angled cut transition between two intersecting surfaces
two
A blend (loft feature) requires at least ______ profile sketches, and the model is formed by a smooth transition between these profiles
extruded feature
A boss or cut feature that is bounded by the surfaces swept out in a spaced by a planar profile as it is pulled along a path perpendicular to the plane of the profile is called a(n) _________.
feature pattern
A feature array, also called a _______, is a method for making additional features by placing copies of a master feature on the model at a specified equal spacing.
circularity
A good analogy of the _______ control is a stack of pennies. This tolerance would control how round each penny is but not the straightness of the whole stack
solid
A good rule of thumb to follow when dimensioning is to dimension only to visible or ______ lines
dimension
A numerical value expressed in appropriate units of measure and used to define the size, location, geometric characteristic, or surface texture of a part or part feature is a(n) __________
profile
A planar sketch that is used to create a solid is called a ______
round
A smooth transition of the external edge created by intersecting surfaces and tangent to both intersecting surfaces is called a _______
fillet
A smooth transition of the internal edge created by intersecting surfaces and tangent to both intersecting surfaces is called a ________
axonometric
A(n) _____ drawing refers to three types of pictorial drawings: isometric, trimetric, and dimetric
dimension
A(n) ______ line, along with its arrowheads, shows the direction and extent of a dimension
offset section
A(n) _________ allows multiple features, which normally require multiple section views, to be captured on a single view
protrusion
Adding material to or removing material from the original model can create a more complex model. When material is added, a(n) _________ is created
ten
All datum simulators must be at least _______ times better in quality than the tolerances specified on the drawings to be considered datum simulators
right-side
Although there are no defined rules as to which views must be included or excluded in a formal engineering drawing, there is a preferred configuration - the front, top, and ______ views
rigid
An assembly that is fully constrained is ________
adjacent
Any view that is projected from one view into the next is _______ to the first view
Parent-child
As with objects and features, the associations between components and subassemblies are often called _____ relationships
Ellipses
Circles appear as _____________ in isometric sketches
position
Datums are always required for ________
ten
Dimension lines also should be at least _______ millimeters from any view, helping to avoid clutter
tolerance
Each dimension shall have a _________, except for those dimensions specifically identified as reference, maximum, minimum, or stock (commercial stock size)
Six
Each time you bring an instance of a component into an assembly, you introduce ________ degree(s) of freedom.
gothic
Engineering drawings require the use of single-stroke _______ lettering
auxiliary
For some objects for which six views are insufficient, a supplementary view, known as a(n) ________ view, must be created before measurements can be specified for the feature represented in that view
height
Front and right-side views are adjacent views that share _____
planes
Generally, solid modelers offer at least three types of datum geometries that can be placed into a model: datum points, datum axes, and datum ________
relationships
Geometric constraints are definitions used to control the shape of a profile sketch though geometric ________
top
Horizontal surfaces are seen in true shape and size in the _______ view
circular
If a cutting plane is oriented perpendicular to the axis of a cylinder, a _________ cross-section results
hidden lines
If hidden features are relatively few and simple in geometry, such as a few simple holes or slots that go all the way through the part, the use of ______ is probably best
datum
In GD&T, the _______ reference frame is a theoretical system made up of three mutually perpendicular planes established by real features on the object
baseline
In ________ dimensioning, all of the dimensions in a given direction originate from a base or datum
orthogonal
In ___________ projection, the image of an object is composed of points projected from individual points on the object onto the viewing plane such that the projection of each point is perpendicular to the viewing plane
blind
In an extruded feature, the length of the extrusion must be specified. There are several options for defining the length of the extrusion, but the simplest is to specify a __________ extrusion.
mating surfaces
In assembly modeling, coincidence of two places is defined with the ______ constraint
instances
In assembly modeling, the copies of a component are called _________
assembly constraints
In assembly modeling, you can apply _______ between two 3-D instances so the instances maintain dimensional or geometric relationships with respect to each other within the assembly
hidden lines
In isometric pictorial views, __________ are generally not shown unless needed for interpretation of the object
In the plane of the paper
In oblique sketches, objects are more understandable when you are viewing the complex surface _______
first-angle
In some parts of Asia and Europe, ______ projection is commonly used. Each viewing plane is behind the object, which means the object is between you and the viewing plane
problem identification
In the _______ stage of design, the design engineer must address questions and answers from the customer's/client's perspective and from the engineer's perspective
perpendicularly bisected
In the case of 3-D object reflections, each point of the object gas an image point in the reflection such that the line segment joining them is _______ by the plane of reflection.
Parametric Design
In the late 1980s, a new software algorithm known as _____________ increased the utility of solid modeling by making it possible to link the sizes and locations of features on an object to variables that could be input and changed easily.
millimeter
Most drawings conform to the International System of Units (SI), which is metric and uses the ______ as the standard unit; or they conform to U.S. customary units with a standard unit of the decimal inch.
glass box
Objects such as engineered parts can usually be fully defined when they are viewed through a set of viewing planes that together form a(n) ____________
hidden lines
One of the main incentives for using section views is to reduce the use of ______
one-quarter
One way of visualizing a half section is to imagine a part that is cut such that _______ of it is removed to reveal the interior
shading
Section lines, which are a form of ________, are used to identify areas on the section view that are solid on the original whole object
cross section
Slicing a 3-D object with a cutting plane results in a _____________
interference
The amount that two instances overlap is referred to as the ________ between them
least material condition
The counterpart of MMC is the _________, which is the condition in which a feature of size contains the minimum amount of material within the stated limits of size
ground
The first constraint usually applied to a new sketch is a ________ constraint, which serves as an anchor to fix the geometry in space
chamfers
The most common edge transitions are rounds, fillets, and _________
elliptical
The simplest curve - a circle or an arc of a circle - appears ________ on a pictorial
full section
The simplest section view is the ___________
features
The various protrusions and cuts on the main body of a model are called.
Closest to the viewer
To begin an oblique sketch, you need to determine which surface on the object is __________
revolved solid
To create a ______, a profile is rotated about an axis
brainstorming
What is an alternate name for brainwriting?
clearance
What is another name for the minimum distance between parts
interference
What is meant by overlapping is that objects share a common volume in 3-D space-called the volume of _____________
brainstorming
What is the name for the process that involves generating as many ideas as possible?
brainstorm
What kind of figure has a leading column that lists the various desirable functions of the proposed design?
A single point
When an object is rotated about two axes, _____________ remains in the same place
parallel
When applying a mating surface constraint, you are forcing the normals of the two surfaces to be ______ to each other
stretched
When cutting planes are angled, the dimensions of the resulting cross-section "along" the plane becomes "_________" compared with the dimensions of the cross section that results when the cutting plane is not angled
function
When designing a device or a system, the engineer must keep certain factors in mind, which are usually related to the _______ and cost of the resulting system
Receding
When making oblique sketches, the length of the _____________ dimension is not too important
bilateral-equal
When profile tolerances are equally distributed about the perfect geometry of the feature, this is referred to as a ________ distribution
reference
When the "inside" dimensions are more important or more critical than the overall dimension, the overall dimension should be identified as a(n) _______
concentric
Which geometric constraint forces the centers of two circles or arcs to be coincident?
locational interference fit
Which type of English fit is intended where accuracy of location is of prime importance and where parts require rigidity and alignment with no special requirement for bore pressure?
direct
Which type of dimensioning offers the best way to eliminate tolerance accumulation
offset
While 3-D modeling, creating stepped cutting plane lines in the views of interest usually specifies _________ cutting planes
weighted decision table
With a _________, all the common attributes and desirable features of each concept are listed in the first column. A numerical factor for each feature/attribute is then established.
The diagonal of a cube
With the isometric method, the axes are projected onto the paper as if you were looking down _________
form
______ tolerances are for individual features and are not related to any datums. This group of geometric tolerances includes straightness, flatness, circularity (roundness), and cylindricity
leaders
_______ are used to direct a dimension, note, or symbol to the intended place on a drawing
Computer-Based 3-D Modeling
_______ as an engineering design tool began in the 1980's
Dimensional constraints
________ are the measurements used to control the size and position of entities in your sketch
Mass Production
________ in the 1800's meant that each product had to be identical to all other products, had to be fabricated within predictable and short production times, had to be made from parts that were interchangeable, and had to be produced economically in volumes much larger than in the past
circular runout
___________ is a 2-D control similar to circularity or roundness. The main difference is that it controls a surface relative to a datum axis
top-down
_____________ assembly modeling is especially effective when multiple teams, many times in different parts of the world, are working on a single design
features
distinctive geometric shapes on solid parts are called _________
six
how many standard or principal views are there?
