Deck 1: Computer Numerical Control of Machine Tools

Question 1

The simplest type of electric motor used in CNC positioning systems is the ____ motor.

A) resolution
B) drill
C) stepper
D) servo

Answer 1

C

Question 2

What is the most popular language for NC programming?

Answer 2

The most popular language for NC programming is G & M code programming, based on the Electronics Industries Alliance and International Standards Organization standard (EIA/ISO). This is a language standardized by American and European industry/standards organizations in an attempt to make NC programming uniform.

Question 3

A(n) ____ is any device that is used to give positioning feedback to the control.

A) machine
B) control unit
C) resolver
D) encoder

Answer 3

D

Question 4

Surface grinders and cylindrical grinders were probably the last frontier for CNC systems.

Question 5

In ____, a heated head deposits minute droplets of molten plastic onto a base layer.

A) 3-D printing
B) fused deposition modeling
C) selective laser sintering
D) stereo lithography

Question 6

Drive motors are not a specialized component in the drive system.

Question 7

Before the industrial revolution (1750-1830), products were largely made by hand.

Question 8

Manual machine tools are obsolete.

Question 9

The main control computer of a CNC system is the ____.

A) MCU
B) SLS
C) AGV
D) PLC

Question 10

Why was the steam engine important?

Question 11

A process similar to a laser is called CNC ____ cutting.

A) gas
B) plasma
C) liquid
D) solid-state

Question 12

The function of a feedback system is to provide the control with information about the status of the motion control system.

Question 13

A machine ____ is a machine that is capable of producing another machine.

A) motor
B) producer
C) round
D) tool

Question 14

What are some similarities between CNC and manual machine tools?

Question 15

What are open-architecture controls?

Question 16

One horsepower is equal to lifting ____ lbs up to a distance of 1 ft in 1 second.

A) 450
B) 500
C) 550
D) 600

Question 17

There are two main types of feedback systems: ____.

A) open-loop and closed-loop
B) hot and cold
C) electronic and mechanical
D) digital and analog

Question 18

Today, manual machine tools have been largely replaced by ____ Control machine tools.

A) Computer Numerical
B) Computer Machine
C) Manual Computer
D) Manual Numerical

Question 19

Lathe work has historically been ____.

A) a low-volume affair
B) a high-volume affair
C) incapable of cutting circular arcs
D) incapable of providing consistent surface finishes

Question 20

What advantages do CNC lathes have over their conventional counterparts?