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Cab 4 Red Seal Review > CNC IP Practice Test > Flashcards

CNC IP Practice Test Flashcards

1
Q

Why is CNC technology adapted to many millwork manufacturing settings?

A

It Is reliable, accurate and cost effective

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2
Q

When CNC technology is used for making different custom components, what type
of manufacturing is that company engaged in?

A

Intermittent

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3
Q

You have a set up a CNC machine to produce case parts for a simple type of unit. All the parts
are identical. Which term describes your operation?

A

High volume - low mix

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4
Q

While reorganizing your shop you decide to place the radial arm saw, the jointer and the
planer close together. What have you been considering when you make this decision?

A

Process flow

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5
Q

When you reorganized your plant floor from an assembly line to a U-shaped work cell. What are
two results you expect from this

A

Same production, fewer workers

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6
Q

At your shop, you only have production space and never carry an excess inventory of materials.
Why is this?

A

You are a just In time shop

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7
Q

What information system helps control the manufacturing steps on cut sheet materials in some
large automated plants?

A

Bar codes

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8
Q

After switching your shop over to a CNC based machining system, after a few months you are
unable to met expenses even though you still have good sales figures. What crucial analysis did
you fail to perform adequately

A

Return on investment

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9
Q

In the picture below, what is the name of the process that decides how to break smaller pieces
out of a larger sheet?

A

Sheet optimization

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10
Q

In which example below is CNC machinery best utilized?
a) The part is too complex and time-consuming to produce by hand
b) You are unable to get a cad drawing for a part produced quickly
c) You have many parts but no currently available program on file
d) The simple parts are normally produced on a regular table saw

A

a) The part is too complex and time-consuming to produce by hand

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11
Q

What is the chief advantage of batching when using CNC equipment?

A

Reducing costs per unit

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12
Q

Nesting technology is suited to which type of manufacturing?

A

Custom

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13
Q

In CNC terminology, what is the Z axis on a 3 axis machine

A

Up and down

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14
Q

Which type of CNC is adapted mainly for drilling holes in a single plane?

A

Point-to point

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15
Q

When was NC manufacturing widely accepted and readily available?

A

1960

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16
Q

What type of machine does not have programs stored in a computer and instead responds to
the direct input of the operator.

A

NC Machine

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17
Q

What type of machine receives inputs from a program stored on a computer?
a) CNC machine
b) DET machine
c) NC machine
d) Point-to-point machine

A

CNC machine

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18
Q

What percentage of woodworking machinery today are CNC’s?

A

85%

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19
Q

True or False. Axis on CNC machines are defined as any point in two-dimensional space

A

F

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20
Q

True or False. Setups and changeovers are quicker on conventional machines than on CNC
machines.

A

F

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21
Q

Which of these power systems is not used on CNC machinery?
a) Electric
b) Magnetic
c) Hydraulic
d) Pneumatic

A

b) Magnetic

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22
Q

An operator is turning on a CNC router to machine nested components out of a sheet of¾”
plywood. What is the order of operations they will follow?

A

Turn on the power, turn on the air, load the plywood, run the program

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23
Q

What does a CNC machine require that will allow the control of the correct speed, direction
of rotation and the smooth transition of speeds for all operations?

A

frequency converter

24
Q

What type of power system is used as the motive system to power a CNC’s cutter head (as in a
router) or to activate the beam (as in a panel saw)?

A

Compressed air

25
Q

Hydraulics used in larger machines uses what process to create movement?

A

liquid

26
Q

What are hydraulics used for in CNC machinery?

A

Clamp spindles

27
Q

What device on a CNC router may be programmed to automatically control the machines
correct speed, the direction of rotation and the smooth transition of speeds for all
operations?

A

Frequency converter

28
Q

What type of motor in a CNC machine is highly precise and the most popular choice in industry
today?

A

Servo

29
Q

True or False. A servo motor on a CNC rotates to a fixed number of degrees when it receives
and electrical pulse.

A

F

30
Q

What type of electrical motor operates in a smooth, continuous motion, which results in
highly desirable machining characteristics?

A

Servo

31
Q

What type of CNC machine is seen in this graphic?

A

NP
Gantry rail

32
Q

On a gantry rail CNC router what is the axis of movement that defines when the tool is
extended or retracted vertically in and out of the work piece?

A

Z

33
Q

True or False. In larger machines, chains are used for driving cutters

A

F

33
Q

What type of mechanism is seen in this graphic?

A

NP
Ball screw

34
Q

What type of CNC devise is seen in this graphic?

A

NP
Vacuum pods

35
Q

True of False. In this graphic the material does not move?

A

NP
True

36
Q

True or False. In this CNC machine configuration, the material does not move.

A

F

37
Q

What controls the movement of a table, material or cutterhead beyond pre-set limits?

A

Limit switches

38
Q

What function does the safety device shown in this graphic do?

A

NP
does not allow the machine to operate

39
Q

On a CNC machine, what main control device stores the information and tells other components
what to do?

A

machine control unit

40
Q

On a CNC machine, what does MRZ stand for?

A

machine reference zero

41
Q

A CNC operator is facing the front of a CNC point-to-point machine. The machine has just drilled
a 19mm hole in a sheet of 25 mm thick MDF. As programmed, the machine now moves 355 mm
to the operator’s right and drills another 19mm hole. What is the distance between the edges of
the two holes?

A

336 mm

42
Q

A CNC operator is facing the front of a CNC point-to-point machine. The machine has just drilled
a¾” hole in a sheet of 25 mm thick MDF. As programmed, the machine now moves 355 mm to
the operator’s right and drills another¾” hole. What were the machines axes of movement
during these programmed commands?

A

NP
Z and X

43
Q

When a CNC machine is set up to work from part reference zero, what location will the cutter
head begin machining on the part?

A

lower left

44
Q

A CNC router is machining a part. In reference to the operator who is facing the machine
what is the direction of travel of the cutter if the bit is moving from X3 Y2 to X3 Y355?

A

Front to back

44
Q

A CNC router is machining a part. In reference to the operator who is facing the machine
what is the direction of travel of the cutter if the bit is moving from X35 Y2 to X14 Y2?

A

Right to left

45
Q

On CNC machines, what does the code seen in this graphic control?

A

NP
Specific movement of the tool

46
Q

In reference to the program controls of a CNC, what is the purpose of M-Codes?

A

Activate or de-activate a performance or task

47
Q

What term describes the arrangement of parts that are cut out of one sheet, so all the parts
are arranged to fit together while leaving space for the kerf or swath of the tooling?

A

Nesting

48
Q

True of False. Cell manufacturing means a grouping of machines and processes to deal with
unusual product configurations

A

False

49
Q

What does the term CAM stand for?

A

Computer Aided Manufacturing

50
Q

On a CNC router, if you are working in a Z positive axis where would the cutter be?
a. Cutting into the work piece

A

Anywhere above the work piece

51
Q

When we talk about CNC machines and say that they have high repeatability compared to
conventional machining techniques, what does that mean?

A

They are more accurate

52
Q

On a CNC router, what is meant by the term, tool compensation?

A

A+ or- offset of the line

53
Q

You are using a CNC router with a 4’ x 8’ bed. Which way does the X axis run?

A

Along the 8’ dimension

54
Q

With respect to CNC routers, what are G codes?

A

Preparation codes

55
Q

On a CNC router, which axis is working in a negative value when the tool is cutting?

A

Z

Cab 4 Red Seal Review (6 decks)

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