CAD stands for what?
A Computerized axis drive
B Central assembly drawing
C Computer-aided design
D Calculated analog dimension
Answer: C. Computer-aided design. CAD uses computers to create, modify and document designs.
A wireframe model represents geometry using points and what?
A Solid volume only
B Edges
C Material properties
D Toolpaths
Answer: B. Edges. Wireframe models define vertices and edges without filled faces or volumes.
A solid model represents what explicitly?
A Only visible edges
B Surface color
C Enclosed volume
D Machine motion
Answer: C. Enclosed volume. Solid modeling defines a closed volume with inside and outside.
Parametric CAD stores dimensions and what relationships?
A Design constraints
B Only rendered images
C Tool wear values
D Supplier invoices
Answer: A. Design constraints. Parametric models use dimensions and constraints to control geometry.
Feature-based modeling builds parts from what?
A Random pixels
B Machine coordinates
C Engineering features
D Inspection charts
Answer: C. Engineering features. Features such as holes, pockets and fillets define design intent.
A sketch plane is used to define what?
A Tool wear
B Material density
C CNC coolant
D 2D profile
Answer: D. 2D profile. A sketch plane supports 2D geometry that can become a 3D feature.
An extrusion creates a feature by extending a profile in what direction?
A Circular path
B Random path
C Linear direction
D Helical axis only
Answer: C. Linear direction. Extrusion extends a 2D profile along a straight direction.
A revolve creates geometry by rotating a profile about what?
A Straight edge only
B Axis
C Surface normal only
D Toolpath tangent
Answer: B. Axis. Revolving a profile around an axis forms an axisymmetric feature.
A sweep moves a profile along what?
A Single point only
B Path
C Fixed plane
D Material boundary
Answer: B. Path. A sweep carries a section along a defined trajectory.
A loft blends profiles located on what?
A Different sections or planes
B One point only
C Same circle only
D A machine axis only
Answer: A. Different sections or planes. Lofting creates a transition through multiple cross-sections.
Boolean union combines solids into what?
A Separate drawings
B Tool offsets
C Assembly constraints
D One solid
Answer: D. One solid. Union merges overlapping solids into a combined volume.
Boolean subtraction removes one solid from what?
A Another solid
B An assembly mate
C A drawing layer
D A toolpath
Answer: A. Another solid. Subtraction uses one volume as a cutting tool against another.
Boolean intersection keeps which geometry?
A All exterior faces
B Only removed material
C Overlapping volume
D No material
Answer: C. Overlapping volume. Intersection retains the volume shared by the selected solids.
A geometric constraint can make two lines what?
A Different colors
B Different lengths always
C Noncoplanar
D Perpendicular
Answer: D. Perpendicular. Geometric constraints define relationships such as perpendicularity or tangency.
A dimensional constraint controls what sketch property?
A Size or distance
B Material hardness
C Tool speed
D Machine power
Answer: A. Size or distance. Dimensions specify lengths, radii, angles or distances in a sketch.
A fully constrained sketch has how many remaining DOF?
A One degree
B Three degrees
C Infinite degrees
D Zero degrees
Answer: D. Zero degrees. A fully constrained sketch cannot move or change size without editing constraints.
Assembly mates define what between components?
A Surface finish
B Relative position and motion
C Material density
D Tool wear
Answer: B. Relative position and motion. Mates constrain component location and permitted movement in an assembly.
A bill of materials lists assembly what?
A Toolpaths and feeds
B Stress results
C CNC alarms
D Components and quantities
Answer: D. Components and quantities. A BOM records parts, quantities and often part identifiers.
STEP is commonly used as what CAD exchange format?
A Native machine code
B Raster image only
C Neutral 3D format
D Tool offset file
Answer: C. Neutral 3D format. STEP transfers product geometry and related data between CAD systems.
IGES is a neutral format for exchanging what?
A Geometry data
B CNC coolant
C Machine alarms
D Assembly torque only
Answer: A. Geometry data. IGES exchanges CAD geometry such as curves and surfaces.
A native CAD file usually preserves what best?
A Only pixels
B Application design features
C Machine tool coordinates
D Material inventory
Answer: B. Application design features. Native files retain feature history and application-specific design information.
PLM manages product information across what?
A Only CAD sketching
B Only machining
C Only inspection
D Product lifecycle
Answer: D. Product lifecycle. Product lifecycle management coordinates product data from concept through service.
PDM primarily controls product files and what?
A Machine spindle speed
B Revisions
C Tool hardness
D Supplier quality only
Answer: B. Revisions. Product data management organizes files, revisions and access workflows.
An engineering drawing communicates geometry and what?
A Manufacturing requirements
B Fuel consumption
C Machine efficiency
D Customer demand only
Answer: A. Manufacturing requirements. Drawings specify dimensions, tolerances, materials and notes for manufacture.
CAD layers help organize what drawing content?
A Related entities
B Solid mass
C Tool wear
D Assembly forces
Answer: A. Related entities. Layers separate and manage categories of drawing geometry and annotations.