G00 generally commands what CNC motion?
A Feed cutting move
B Clockwise arc
C Spindle orientation
D Rapid positioning
Answer: D. Rapid positioning. G00 moves rapidly to a position without a programmed cutting feed.
G02 commonly commands which arc direction?
A Clockwise arc
B Counterclockwise arc
C Linear move
D Spindle stop
Answer: A. Clockwise arc. In standard CNC conventions, G02 specifies clockwise circular interpolation.
G03 commonly commands which arc direction?
A Counterclockwise arc
B Clockwise arc
C Rapid move
D Tool change
Answer: A. Counterclockwise arc. G03 specifies counterclockwise circular interpolation in the selected plane.
Spindle speed is commonly measured in what units?
A Millimetres per minute
B Revolutions per minute
C Newtons per metre
D Degrees per second
Answer: B. Revolutions per minute. Spindle speed is typically stated in rpm.
Feed rate for milling is often stated in what units?
A Distance per minute
B Revolutions per metre
C Newtons per second
D Degrees per tooth
Answer: A. Distance per minute. Feed rate is commonly expressed as millimetres per minute.
Cutting speed in turning depends on work diameter and what?
A Spindle speed
B Tool length
C Cutter offset
D Table mass
Answer: A. Spindle speed. Cutting speed is proportional to workpiece diameter and rotational speed.
A CNC tool library stores tool geometry and what?
A Customer records
B Product invoices
C Operator schedules
D Cutting data
Answer: D. Cutting data. Tool libraries hold tool dimensions, offsets and cutting parameters.
A CNC machine coordinate system is referenced to what?
A Part datum only
B Tool tip only
C Machine origin
D Spindle speed
Answer: C. Machine origin. Machine coordinates use a fixed origin established by the machine.
Cutter compensation G41 typically offsets tool to which side of path?
A Right side
B No side
C Along Z only
D Left side
Answer: D. Left side. G41 selects left cutter compensation relative to the programmed travel direction.
Cutter compensation G42 typically offsets tool to which side of path?
A Left side
B No side
C Right side
D Along X only
Answer: C. Right side. G42 selects right cutter compensation relative to programmed travel direction.
Tool wear compensation adjusts what during production?
A Product material
B Tool offset values
C Spindle bearing size
D CAD sketch constraints
Answer: B. Tool offset values. Wear offsets compensate gradual tool dimension changes.
A fixture datum should locate the workpiece repeatably relative to what?
A Machine axes
B Supplier dock
C Coolant tank
D Operator station
Answer: A. Machine axes. A fixture locates the part in a consistent coordinate frame.
Backlash compensation corrects lost motion when what reverses?
A Spindle speed
B Tool diameter
C Axis direction
D Coolant flow
Answer: C. Axis direction. Backlash appears when motion reverses due to clearance in a drive mechanism.
A CNC servo system controls axis position using what?
A Manual gauges only
B Feedback
C Gravity
D Coolant pressure
Answer: B. Feedback. Servo drives use feedback to command and correct axis motion.
A machine tool calibration checks accuracy of what?
A Product demand
B Positioning and geometry
C Operator fatigue
D Tool color
Answer: B. Positioning and geometry. Calibration verifies machine positioning, alignment and measurement performance.
A CNC probing cycle can verify part dimensions during what?
A Product shipment only
B Machining setup or process
C Fuel filling
D Casting only
Answer: B. Machining setup or process. In-process probing can set datums and inspect features without removing the part.
A collision check evaluates tool, holder, workpiece and what?
A Customer profile
B Machine components
C Inventory levels
D Product price
Answer: B. Machine components. Collision detection includes the cutting assembly, workpiece and machine envelope.
A machine digital twin combines model with what?
A Only a paper drawing
B Supplier quote
C Unrelated inventory
D Operating data
Answer: D. Operating data. A digital twin links a digital model with data from its physical counterpart.
Industry 4.0 emphasizes connected equipment and what?
A Data-driven automation
B Manual-only production
C Fixed paper routes
D No sensors
Answer: A. Data-driven automation. Industry 4.0 integrates connectivity, data and automation in manufacturing.
Cybersecurity for connected machines protects what?
A Surface finish
B Tool geometry
C Part mass
D Control systems and data
Answer: D. Control systems and data. Industrial cybersecurity safeguards controllers, networks and production information.
A CAPP system can generate what from design features?
A Only product colors
B Fuel maps
C Customer contracts
D Operation plans
Answer: D. Operation plans. CAPP derives process routes and operation plans from product definition.
CIM integrates computer systems across what?
A Only machine motion
B Only quality inspection
C Manufacturing functions
D Only finance
Answer: C. Manufacturing functions. Computer-integrated manufacturing coordinates design, planning, production and control systems.
A CNC toolpath simulation can verify machining time and what?
A Customer demand
B Supplier credit
C Material removal
D Product warranty
Answer: C. Material removal. Simulation predicts cutting motion, material removal and potential collisions.
Additive build orientation affects support needs and what?
A CNC spindle speed
B Thread pitch
C Surface quality
D Gear ratio
Answer: C. Surface quality. Build orientation influences surface finish, strength direction and support requirements.
A postprocessor should match the target machine controller and what?
A Machine configuration
B Product color
C Supplier location
D Inspection frequency
Answer: A. Machine configuration. Postprocessing must reflect controller syntax, axes, tools and machine options.