CNC PROGRAMMING LEVEL 1

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Quiz Questions

In machining of a workpiece, the material is removed by_____ *

1 point

using brittleness of the materia

melting action

drilling action

shearing acting

The depth that the tool is plunged into the surface is called as ______ *

1 point

feed

depth of tool

working depth

depth of cut

Correct answer 3

Feed is measured in units of _____ *

1 point

length/revolution

degree/revolution

length

velocity

In CNC systems multiple microprocessors and programmable logic controllers work ______

1 point

in parallel

in series

one after the other

for 80% of the total machining time

Clear selection

An absolute NC system is one in which all position coordinates are referred to one fixed origin called the zero point.

1 point

true

False

Clear selection

Which of the following code will give point to point movement?

1 point

G54

G55

G00

G01

Clear selection

Which of the following code will give linear interpolation movement?

1 point

G00

G01

G91

G02

Clear selection

Which of the following code is used to select x y plane in milling?

1 point

G18

G17

G10

G04

Clear selection

In CNC machine tool, the part program entered into the computer memory

1 point

can be used only once

can be used again and again

can be used again but it has to be modified every time

cannot say

Clear selection

Several machine tools can be controlled by a central computer in

1 point

NC (Numerical Control) machine tool

CNC (Computer Numerical Control) machine tool

DNC (Direct Numerical Control) machine tool

CCNC (Central-Computer Numerical Control) machine tool

Clear selection

Part-programming mistakes can be avoided in

1 point

NC (Numerical Control) machine tool

CNC (Computer Numerical Control) machine tool

Both a. and b

None of the above

Clear selection

CNC machining centres do not include operations like ______

1 point

milling

boring

welding

tapping

Clear selection

Which of the following is not the advantage of CNC machines?

1 point

Higher flexibility

Increased productivity

Improved quality

Improved strength of the components

Clear selection

Code for multiple turning cycle

1 point

G90

G71

G91

G70

Clear selection

What does 'U' means in multiple turning cycle syntax

2 points

depth of cut in one time

depth of cut

allowance in x axis

allowance in z axis

The purpose of feedback device in CNC machine tool is to provide inforamtion about

1 point

speed

speed & displacement

force

torque

Clear selection

When referring to CNC programming, which of the following is the command coed to move the tool in the clockwise direction?

1 point

G01

G02

G03

G05

Clear selection

When referring to common CNC programming structures, which of the following is the best example of an end of block character?

1 point

M30

;

Clear selection

With CNC turning machines and preparatory codes what does a "G01" represent?

1 point

A code that allows the tool to dwell at a location.

It is a linear interpolation feed rate code.

It instructs the control to move rapidly to specific X and Z locations.

It directs the machine control to use to use workpeice coordinate values stored in memory.

Clear selection

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