CAD CAM and CIM MCQs 2026

Reverse engineering from point cloud uses

1. A only destruction of part without measurement ✓
2. B only guesswork without data ✓
3. C scanned data to reconstruct CAD surfaces ✓
4. D only boiler code formulas ✓

CMM (Coordinate Measuring Machine) verifies

1. A only chemical composition only ✓
2. B only motor horsepower only ✓
3. C only air humidity only ✓
4. D part dimensions against CAD drawing ✓

Toolpath simulation in CAM verifies

1. A collisions, gouges and uncut material before machining ✓
2. B only employee attendance ✓
3. C only tax returns ✓
4. D only musical rhythm ✓

Clearance fit means

1. A interference always ✓
2. B hole always larger than shaft for free movement ✓
3. C exact zero gap always ✓
4. D only press fit always ✓

Tolerance stack-up analysis calculates

1. A cumulative effect of part tolerances on assembly fit ✓
2. B only surface roughness Ra only ✓
3. C only motor RPM only ✓
4. D only room temperature only ✓

Surface finish symbol Ra indicates

1. A hardness HRC ✓
2. B tensile strength MPa ✓
3. C electrical resistance ohm ✓
4. D arithmetic average roughness ✓

Design for Manufacturability (DFM) aims to

1. A simplify fabrication and assembly during design stage ✓
2. B maximize machining setups deliberately ✓
3. C use impossible tolerances always ✓
4. D ignore material availability ✓

Section view in drawing shows

1. A only external outline always ✓
2. B only bill of quantities ✓
3. C only welding rod diameter retail only ✓
4. D internal features by imagined cutting plane ✓

PDM manages

1. A only motor oil viscosity in engines only ✓
2. B engineering documents and CAD file vault with version control ✓
3. C only river flow hydrology only ✓
4. D only textile dye colour only ✓

Isometric drawing shows

1. A true orthographic projection without distortion ✓
2. B only top view duplicated ✓
3. C three faces of object with parallel axes 120° apart ✓
4. D only hidden line removed by standard mandate ✓

PLM (Product Lifecycle Management) integrates

1. A only cafeteria menu planning ✓
2. B only bus schedules ✓
3. C CAD data, revisions, BOM and change control ✓
4. D only sports scores ✓

SolidWorks, CATIA and Creo are primarily

1. A only PLC ladder editors only ✓
2. B only payroll systems ✓
3. C only weather radars ✓
4. D parametric CAD modelers ✓

Mastercam, Fusion 360 and SolidCAM are examples of

1. A only word processors ✓
2. B only antivirus programs ✓
3. C only social media apps ✓
4. D CAD/CAM software systems ✓

Bill of materials extracted from CAD links

1. A only toolpath feedrates ✓
2. B model structure to parts list for procurement ✓
3. C only spindle RPM only ✓
4. D only coolant pH ✓

Kinematic simulation in CAD assembly checks

1. A motion interference and range of travel ✓
2. B only chemical corrosion rate ✓
3. C only electrical resistivity only ✓
4. D only paint drying time only ✓

Slicing software for 3D printing converts

1. A STL model to layer toolpaths ✓
2. B only G-code to STL reverse always primary ✓
3. C only PDF invoices ✓
4. D only spring calculations ✓

SLA 3D printing cures

1. A clay air drying only ✓
2. B liquid photopolymer resin with UV light ✓
3. C only wood sawdust glue only ✓
4. D only steam condensation ✓

FDM 3D printing extrudes

1. A metal powder laser only always ✓
2. B only concrete slurry always ✓
3. C thermoplastic filament layer by layer ✓
4. D only glass molten bath always ✓

Rapid prototyping (additive manufacturing) builds part by

1. A only removing bulk from billet only subtractive ✓
2. B only forging hammer only ✓
3. C only sand casting only ✓
4. D adding material layer by layer ✓

FEA preprocessing from CAD includes

1. A only printing paper drawing ✓
2. B only inventory EOQ calculation ✓
3. C only welding electrode selection retail ✓
4. D meshing solid model with elements ✓

NURBS curves are used in CAD because they

1. A only draw straight lines ✓
2. B only encode text fonts without geometry ✓
3. C exactly represent conics and free-form shapes with local control ✓
4. D only measure hardness ✓

IGES was early standard for

1. A only email protocol ✓
2. B CAD data exchange between dissimilar systems ✓
3. C only hydraulic schematic only ✓
4. D only boiler code only ✓

STEP (ISO 10303) file format supports

1. A exact boundary representation solid model exchange ✓
2. B only 2D bitmap images ✓
3. C only audio waveforms ✓
4. D only spreadsheet cells ✓

STL file format represents geometry as

1. A triangular mesh facets ✓
2. B parametric feature tree ✓
3. C solid NURBS only always ✓
4. D handwritten G-code ✓

APT language historically used for

1. A only web page design ✓
2. B NC part programming with geometry and motion statements ✓
3. C only database SQL queries ✓
4. D only music synthesis ✓

Turning operation on CNC lathe removes material from

1. A stationary cube on milling table primarily ✓
2. B only sheet metal blank flat only ✓
3. C rotating workpiece using single-point tool ✓
4. D only sand mould cavity ✓

5-axis machining allows

1. A only drilling along Z always ✓
2. B only 2D lathe turning ✓
3. C only manual hacksaw ✓
4. D tool orientation adjustment while cutting complex surfaces ✓

3-axis CNC milling moves

1. A five axes simultaneously always standard on all machines ✓
2. B only rotary spindle without linear ✓
3. C only one axis ever ✓
4. D tool in X Y Z while workpiece fixed or indexed ✓

FEA modal analysis finds

1. A natural frequencies and mode shapes ✓
2. B only steady-state heat flux only ✓
3. C only inventory levels ✓
4. D only tool wear VB only ✓

Roughing toolpath removes

1. A only final polish pass ✓
2. B bulk material quickly leaving stock for finishing ✓
3. C only engraving text only ✓
4. D only electrical wiring ✓

Post-processor in CAM translates

1. A generic toolpath to machine-specific NC code ✓
2. B only PDF to Word text ✓
3. C only steel to aluminium metallurgy ✓
4. D only voltage to pressure ✓

CL data in CAM is

1. A cutter location file of tool centre path ✓
2. B customer ledger file ✓
3. C compressed air log ✓
4. D chemical lab report ✓

Work coordinate system (WCS) on CNC defines

1. A only machine manufacturer serial ✓
2. B program zero location on part or fixture ✓
3. C only coolant brand ✓
4. D only electric bill account ✓

Tool offset in CNC compensates for

1. A only ambient room humidity ✓
2. B only operator name spelling ✓
3. C difference between programmed and actual tool geometry ✓
4. D only drawing sheet size ✓

M03 command on CNC mill usually

1. A stops program ✓
2. B opens door lock ✓
3. C zeros work offset only ✓
4. D starts spindle clockwise rotation ✓

G02 and G03 commands are

1. A only dwell pause ✓
2. B only coolant on ✓
3. C only home all axes ✓
4. D circular interpolation clockwise and counterclockwise ✓

G01 command means

1. A rapid traverse ✓
2. B circular arc CW only ✓
3. C linear interpolation feed move ✓
4. D tool change only ✓

G00 command typically means

1. A linear feed cut at set feedrate ✓
2. B rapid traverse positioning ✓
3. C program end only ✓
4. D spindle stop only ✓

Model-Based Definition (MBD) embeds

1. A only handwritten sticky notes ✓
2. B GD&T and annotations in 3D model rather than 2D drawing only ✓
3. C only verbal instructions only ✓
4. D only paint colour on wall ✓

G-code is

1. A programming language for CNC machine commands ✓
2. B only geological survey code ✓
3. C only genetic sequence code ✓
4. D only radio call sign ✓

CNC machine tool executes programs from

1. A part program with interpolated axes motion ✓
2. B only manual handwheel always without motors ✓
3. C only carpenter saw manual ✓
4. D only boiler operator gauge reading ✓

Surface model in CAD defines

1. A only 2D orthographic views ✓
2. B only bill of materials ✓
3. C only tool wear data ✓
4. D outer skin geometry without solid interior necessarily ✓

Trochoidal milling toolpath is

1. A only straight plunge drill ✓
2. B only single point turning ✓
3. C curved high-efficiency path for slotting and roughing ✓
4. D only manual chisel ✓

Finishing toolpath provides

1. A maximum material removal rate only ✓
2. B only drill centre marks only ✓
3. C final surface accuracy and smoothness ✓
4. D only saw kerf roughing ✓

Solid model in CAD is

1. A only single line sketch ✓
2. B only text annotation ✓
3. C only NC G-code listing ✓
4. D complete watertight volume representation ✓

CAD stands for

1. A Computer-Aided Design ✓
2. B Computer-Automated Drafting only ✓
3. C Control-Analog Device ✓
4. D Compressed-Air Drive ✓

CAM stands for

1. A Chemical-Aided Mixing ✓
2. B Computer-Aided Manufacturing ✓
3. C Compressed Air Motor only ✓
4. D Cyclic Asset Management ✓

Interference fit requires

1. A loose sliding always ✓
2. B zero elastic deformation always ✓
3. C assembly force or thermal expansion for mating ✓
4. D only adhesive without dimensional control ✓

Wireframe CAD model represents object using

1. A solid volume with mass properties always ✓
2. B only colour texture maps ✓
3. C edges and vertices only without surfaces ✓
4. D only finite element mesh ✓

High-speed machining (HSM) uses

1. A only hand file at low speed ✓
2. B high spindle speed and feed with light depth of cut ✓
3. C only furnace annealing ✓
4. D only sand blasting ✓

Parametric modeling uses

1. A only fixed bitmap pixels ✓
2. B only hand tracing paper ✓
3. C dimensions and constraints that drive geometry updates ✓
4. D only random number generation ✓

Feature-based modeling builds parts from

1. A only disconnected points cloud without structure ✓
2. B design features like holes, fillets and patterns ✓
3. C only handwritten notes ✓
4. D only acoustic signals ✓

Boolean operations in solid CAD include

1. A union, subtraction and intersection ✓
2. B only translation without merge ✓
3. C only colour blending ✓
4. D only mesh smoothing only artistic ✓

B-rep (Boundary Representation) stores

1. A faces, edges and vertices topology with geometry ✓
2. B only voxel occupancy grid ✓
3. C only G-code blocks ✓
4. D only spring constants ✓

Assembly modeling in CAD manages

1. A only chemical reactions ✓
2. B mating constraints between multiple parts ✓
3. C only payroll data ✓
4. D only steam tables only ✓

Drawing view projection standard ISO first-angle places

1. A projection plane between observer and object (third-angle US) ✓
2. B only isometric without orthographic ✓
3. C object between observer and projection plane ✓
4. D only hidden lines removed always by law ✓

Third-angle projection is standard in

1. A only Japan exclusively always ✓
2. B no engineering field ✓
3. C only woodworking hand tools ✓
4. D United States and Canada commonly ✓

GD&T in engineering drawings uses

1. A only nominal dimensions without tolerances ✓
2. B only paint colour codes ✓
3. C only musical notation ✓
4. D feature control frames for form, orientation and position tolerances ✓

Datum reference frame in GD&T establishes

1. A only decorative border on sheet ✓
2. B only title block font size ✓
3. C coordinate system for measurements ✓
4. D only paper weight gsm ✓

NC machining stands for

1. A Natural Convection only ✓
2. B Numerical Control of machine tools by coded instructions ✓
3. C Nitrogen Cutting only ✓
4. D Nonlinear Control theory only ✓