Hands-On AutoCAD LT ©2005

Chapter 14: Computer-Aided Processes and Operations


1.	The acronym CNC stands for
		A)	computer number control.
		B)	consist numerical control.
		C)	computer numerical control.
		D)	computer numerical contact.


2.	CNC equipment is programmed using
		A)	programming code.
		B)	Excel^®.
		C)	Quicken^®.
		D)	interpolation.


3.	The CNC program tells the machine
		A)	the size of the workpiece.
		B)	the shape of the workpiece.
		C)	the size and shape of cutter to use.
		D)	how and where to move the tool.


4.	The two most common types of numerical control are point-to-point and
		A)	stop-and-start.
		B)	continuous.
		C)	open loop.
		D)	closed loop.


5.	The route along which the tool or cutter travels is the
		A)	pattern.
		B)	template.
		C)	path.
		D)	trail.


6.	A mathematical model used to determine the best-fitting path to approximate locations and to set speeds that are appropriate is
		A)	integration.
		B)	interpolation.
		C)	distribution.
		D)	compilation.


7.	The system in CNC that uses impulses or signals to determine the location of the tools is a(n)
		A)	closed-loop system.
		B)	critical-path system.
		C)	critical-pattern system.
		D)	open-loop system.


8.	In a closed-loop system, the exact location of the axis is determined by the use of a
		A)	contactor.
		B)	sensor.
		C)	capacitor.
		D)	transistor.


9.	Machine tool systems are mainly concerned with two types of machine tool tolerances: accuracy and
		A)	repeatability.
		B)	durability.
		C)	cost effectiveness.
		D)	ease of operation.


10.	Sensors are also called
		A)	locators.
		B)	feelers.
		C)	encoders.
		D)	finders.