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Worksheets

CNC Principles

Total questions: 14

Worksheet time: 11mins

Name
Class
Date
1.

What is a Tap used for?

a)

Reaming a hole to a tight tolerance

b)

Drilling a Hole

c)

Threading a hole

d)

Machining a slot

2.

Select all features a Endmill can be used for

a)

Machining a profile

b)

Machining a Step

c)

Machining a Circular Pocket

d)

Machining a Counterbored Hole

3.

What operation needs to be carried out before Reaming a hole?

a)

Machining a Profile

b)

Drilling a hole

c)

Threading a hole

d)

Countersink a hole

4.

What does M03 function do on a CNC?

a)

Stops the coolant

b)

Ends Programme

c)

Turns Spindle on CW

d)

Turns Spindle on CCW

e)

T

5.

What does G01 Mean?

a)

A linear Movement

b)

A circular movement

c)

A rapid Movement

d)

Stops the Spindle

6.

What does the M13 function do?

a)

Turns spindle on CW

b)

Turns Spindle on CW and Coolant on

c)

Ends Program

d)

Linear Movement

7.

What fixture would be used to hold a round component?

a)

3 Jaw Chuck

b)

Swivel Vice

c)

Tombstone

d)

Collet Chuck

8.

Select the safety features on a CNC machine?

a)

Emergency Stop

b)

NC Control Unit

c)

Door Interlock

d)

Lead Screw

9.

Select the Dovetail Cutter

a)
b)
c)
d)
10.

What are the main Axis on a CNC milling machine?

a)

A/R/T

b)

X/Y/Z

c)

X/T/M

d)

G/M/S

11.

What is the G code for a rapid movement?

a)

G90

b)

G40

c)

G00

d)

G97

12.

What Axis needs to be moved for a depth of cut?

a)

X

b)

C

c)

Y

d)

Z

13.

What M code is used to end program?

a)

M30

b)

M08

c)

M91

d)

M4

14.

If my datum position X0 Y0 is the centre of the sheet what direction are my X+ X- Y- Y+ movements.

Draw them below