27 real CAD Modelling questions from the Mechanical Design bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is Parametric modelling?
Junior
A.feature-based approach where dimensions and relations drive geometry, so changing one value regenerates every dependent feature
B.surface workbench for wireframe, sweeps, lofts and fills used for automotive class-B surfaces and moulded parts
C.sketch in which every entity is fixed by dimensions and relations so nothing can move unintentionally, shown in black rather than blue
D.Indian drawing convention per BIS SP 46 in which the object sits between observer and plane, so the top view is drawn below the front view
2. Which term means: "feature-based approach where dimensions and relations drive geometry, so changing one value regenerates every dependent feature"?
A.Parametric modelling — master part in a top-down assembly holding layout curves, planes and axes that child parts reference so the whole assembly updates together
B.Parametric modelling — sketch in which every entity is fixed by dimensions and relations so nothing can move unintentionally, shown in black rather than blue
C.Parametric modelling — surface workbench for wireframe, sweeps, lofts and fills used for automotive class-B surfaces and moulded parts
D.Parametric modelling — feature-based approach where dimensions and relations drive geometry, so changing one value regenerates every dependent feature
5. Which term means: "sketch in which every entity is fixed by dimensions and relations so nothing can move unintentionally, shown in black rather than blue"?
A.Fully defined sketch — master part in a top-down assembly holding layout curves, planes and axes that child parts reference so the whole assembly updates together
B.Fully defined sketch — Indian drawing convention per BIS SP 46 in which the object sits between observer and plane, so the top view is drawn below the front view
C.Fully defined sketch — sketch in which every entity is fixed by dimensions and relations so nothing can move unintentionally, shown in black rather than blue
D.Fully defined sketch — history-free direct editing that lets faces be pushed, pulled and re-dimensioned on imported or native geometry without a feature tree
8. Which term means: "history-ordered list of features whose parent-child dependencies decide rebuild order and which can be rolled back to edit earlier steps"?
A.Feature tree — G0 shares position, G1 shares tangency and G2 shares curvature across a boundary, with class-A automotive skins requiring G2
B.Feature tree — history-ordered list of features whose parent-child dependencies decide rebuild order and which can be rolled back to edit earlier steps
C.Feature tree — sketch in which every entity is fixed by dimensions and relations so nothing can move unintentionally, shown in black rather than blue
D.Feature tree — feature-based approach where dimensions and relations drive geometry, so changing one value regenerates every dependent feature
11. Which term means: "Indian drawing convention per BIS SP 46 in which the object sits between observer and plane, so the top view is drawn below the front view"?
A.First-angle projection — sketch in which every entity is fixed by dimensions and relations so nothing can move unintentionally, shown in black rather than blue
B.First-angle projection — Indian drawing convention per BIS SP 46 in which the object sits between observer and plane, so the top view is drawn below the front view
C.First-angle projection — master part in a top-down assembly holding layout curves, planes and axes that child parts reference so the whole assembly updates together
D.First-angle projection — history-ordered list of features whose parent-child dependencies decide rebuild order and which can be rolled back to edit earlier steps
14. Which term means: "master part in a top-down assembly holding layout curves, planes and axes that child parts reference so the whole assembly updates together"?
A.Skeleton model — 3D model carrying product manufacturing information (dimensions, GD&T, notes) as the authority in place of a 2D drawing, per ASME Y14.41
B.Skeleton model — surface workbench for wireframe, sweeps, lofts and fills used for automotive class-B surfaces and moulded parts
C.Skeleton model — master part in a top-down assembly holding layout curves, planes and axes that child parts reference so the whole assembly updates together
D.Skeleton model — G0 shares position, G1 shares tangency and G2 shares curvature across a boundary, with class-A automotive skins requiring G2
17. Which term means: "history-free direct editing that lets faces be pushed, pulled and re-dimensioned on imported or native geometry without a feature tree"?
A.Synchronous modelling — history-ordered list of features whose parent-child dependencies decide rebuild order and which can be rolled back to edit earlier steps
B.Synchronous modelling — surface workbench for wireframe, sweeps, lofts and fills used for automotive class-B surfaces and moulded parts
C.Synchronous modelling — sketch in which every entity is fixed by dimensions and relations so nothing can move unintentionally, shown in black rather than blue
D.Synchronous modelling — history-free direct editing that lets faces be pushed, pulled and re-dimensioned on imported or native geometry without a feature tree
A.Generative Shape Design — surface workbench for wireframe, sweeps, lofts and fills used for automotive class-B surfaces and moulded parts
B.Generative Shape Design — history-ordered list of features whose parent-child dependencies decide rebuild order and which can be rolled back to edit earlier steps
C.Generative Shape Design — 3D model carrying product manufacturing information (dimensions, GD&T, notes) as the authority in place of a 2D drawing, per ASME Y14.41
D.Generative Shape Design — feature-based approach where dimensions and relations drive geometry, so changing one value regenerates every dependent feature
A.Surface continuity — master part in a top-down assembly holding layout curves, planes and axes that child parts reference so the whole assembly updates together
B.Surface continuity — feature-based approach where dimensions and relations drive geometry, so changing one value regenerates every dependent feature
C.Surface continuity — G0 shares position, G1 shares tangency and G2 shares curvature across a boundary, with class-A automotive skins requiring G2
D.Surface continuity — history-free direct editing that lets faces be pushed, pulled and re-dimensioned on imported or native geometry without a feature tree
26. Which term means: "3D model carrying product manufacturing information (dimensions, GD&T, notes) as the authority in place of a 2D drawing, per ASME Y14.41"?
A.Model-based definition — G0 shares position, G1 shares tangency and G2 shares curvature across a boundary, with class-A automotive skins requiring G2
B.Model-based definition — history-free direct editing that lets faces be pushed, pulled and re-dimensioned on imported or native geometry without a feature tree
C.Model-based definition — 3D model carrying product manufacturing information (dimensions, GD&T, notes) as the authority in place of a 2D drawing, per ASME Y14.41
D.Model-based definition — master part in a top-down assembly holding layout curves, planes and axes that child parts reference so the whole assembly updates together
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