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WorksheetsCNC
Total questions: 84
Worksheet time: 1hrs 24mins
Name
Class
Date
1.
In Which year first NC Machine was introduced .
a)
1951
b)
1949
c)
1947
d)
1952
2.
The first NC Machine was of type.
a)
3axis
b)
2axis
c)
4axis
d)
1axis
3.
MIT Stands for .
a)
Mistune Institute of technology
b)
Massachusetts Institute of Technology
c)
Missus Institute of Technology
d)
none
4.
Industry has created the need of NC/CNC machine.
a)
Aerospace Industry
b)
Automobile Industry
c)
Tool & Die making Industry
d)
None of the above
5.
EIA Stands For .
a)
Electronics International Association.
b)
Electrical Industries Association.
c)
Electrical International Association
d)
Electronics Industries Association
6.
The term Satellite computer is used in .
a)
NC
b)
CNC
c)
DNC
d)
NONE OF THE ABOVE
7.
NC machine Uses to feed the Program
a)
Punched Tape
b)
Computer
c)
Both A & B
d)
NONE OF THE ABOVE
8.
Punched tape is prepared by device
a)
Teletypewriter
b)
typewriter
c)
Mechanical tape reader
d)
None of the above
9.
NC System uses type of numbering system
a)
Binary
b)
Decimal
c)
Fractional
d)
None of the above
10.
Expand MCU .
a)
Machine Circuit Unit
b)
Machine Control Unit
c)
Motion Control Unit
d)
Memory Control Unit
11.
Expand PWM .
a)
Pulse Width Modulated
b)
Pulse Wide Modulated
c)
Pulse Width mode
d)
none
12.
Tachogenerator is measuring device.
a)
Position Measuring Device
b)
Velocity Measuring Device
c)
Both A & B
d)
None of the above
13.
Application of Point to Point control system is .
a)
Milling
b)
Turning
c)
Grinding
d)
Drilling
14.
PTFE stands for .
a)
Poly tetra fluro ethane
b)
Poly tetra fluro ethylene
c)
Penta tetra fluro ethylene
d)
Poly tetra fluro methane
15.
SCR stands for .
a)
Silicon Circuit Rectifier
b)
Silicon Control Racer
c)
Silicon Controlled Rectifier
d)
Silicon Controlled Radiation
16.
Encoders are Measuring device.
a)
Velocity
b)
Displacement or Position
c)
Both A & B
d)
None of the above
17.
Carbon steels contains % of carbon.
a)
0.8 to 5 %
b)
0.5 to 0 %
c)
8 to 2.0 %
d)
0.2 to 0.8%
18.
Cobalt in HSS Provides .
a)
Hot hardness & form stability
b)
Keeness of the cutting edge
c)
More wear resistance
d)
All the above
19.
Tungsten in HSS provides .
a)
Hot hardness & form stability
b)
Keeness of the cutting edge
c)
More wear resistance
d)
All the above
20.
Basic Ingredient of carbide is .
a)
Titanium
b)
Tungsten
c)
Cobalt
d)
All the above
21.
Rake angle in cutting tool is represented as .
a)
α
b)
β
c)
γ
d)
none
22.
Expand the tool material CB?
a)
Cubic Boron
b)
Cubic Nitride
c)
Cubic Boron Nitride
d)
none
23.
Stellite is composed of Cobalt, Chromium & .
a)
Titanium
b)
Molybdenum
c)
Tungsten
d)
Carbon
24.
In CNMG indexable type inserts, the letter M stands for .
a)
Insert shape
b)
Clearance angle
c)
Tolerance
d)
Insert type
25.
In CNMG 12 04 20, 12 indicate .
a)
Insert type
b)
Insert size = cutting edge length
c)
Insert thickness
d)
Nose radius.
26.
The hardest cutting tool material is .
a)
Carbide
b)
Coated carbide
c)
Diamond
d)
Cermets
27.
A Group of command at each step of the sequence is called .
a)
Word
b)
Block
c)
Address
d)
None
28.
MDI Stands for .
a)
Manual Data Input
b)
Machine Data Input
c)
Machine Drive Input
d)
Manual Data Interpolation
29.
GOO & GO1 comes under type
a)
One shot G Code
b)
Modal G Code
c)
Both A & B
d)
None
30.
G 16 code is used for
a)
XY Plane Selection
b)
Programmable data input
c)
Exact Stop
d)
Polar Co Ordinate command
31.
G 31 Code stands for .
a)
Skip Function
b)
Thread cutting
c)
Automatic tool length measurement
d)
Tool offset - increase
32.
G 20 Code is used for .
a)
Input in Metric
b)
Input in Inch
c)
Polar Co ordinate command on
d)
Polar Co ordinate command off
33.
The function of G 49 Code is .
a)
Scaling cancel
b)
Scaling
c)
Tool Length compensation cancel
d)
Macro Call
34.
G 83 Cycle is used for .
a)
Tapping
b)
Boring
c)
Drilling
d)
Peck Drilling
35.
G 81 Cycle is used for .
a)
Tapping
b)
Spot Drilling
c)
Boring
d)
Peck Drilling
36.
G 18 Code is for .
a)
XY Plane Selection
b)
YZ Plane Selection
c)
ZX Plane Selection
d)
XYZ Plane Selection
37.
G 19 Command is for .
a)
XY Plane Selection
b)
YZ Plane Selection
c)
ZX Plane Selection
d)
XYZ Plane Selection
38.
G 17 Command is for .
a)
XY Plane Selection
b)
YZ Plane Selection
c)
ZX Plane Selection
d)
XYZ Plane Selection
39.
G04 command is used for
a)
Exact stop, Dwell
b)
Spindle Stop
c)
Spindle ON
d)
None
40.
The preparatory code G 30 is used to mention .
a)
Skip Function
b)
Thread cutting
c)
Tool offset Increase
d)
2 nd , 3 rd , 4 th reference position return
41.
G 21 Stands for .
a)
Input in Metric
b)
Input in Inch
c)
Input in Polar Co ordinate
d)
None
42.
D and H terms are used as parameters of
a)
Canned Cycle
b)
Dwell Time
c)
Offset numbers
d)
None
43.
P and X terms are used as parameters of .
a)
Canned Cycle
b)
Dwell Time
c)
Offset numbers
d)
None
44.
P and Q terms are used as parameters of .
a)
Canned Cycle
b)
Dwell Time
c)
Offset numbers
d)
none
45.
is a skip function symbol.
a)
*
b)
/
c)
#
d)
≈
46.
Sequence number is specified for .
a)
All blocks
b)
Only for desired block of the program
c)
Both A & B
d)
None
47.
Rotary axis rotation along X axis is specified by .
a)
D
b)
C
c)
B
d)
A
48.
What Preparatory code is used to travel from Point 1 to 2.
a)
GO1
b)
G02
c)
G03
d)
None
49.
What Preparatory code is used to travel from Point 1 to 2?
a)
GO1
b)
G02
c)
G03
d)
None
50.
MPG stands for .
a)
Manual Power Generator
b)
Manual Pulse Generator
c)
Machine Pulse Generator
d)
Manual Program Generator
51.
JOG mode in control panel is used for .
a)
To start the cycle
b)
To edit the part program
c)
To check the part program
d)
To move the axis manually
52.
In G 82 cycle, the term P denotes .
a)
Number of repeats
b)
Dwell time at the bottom of a hole
c)
Safe height / R point
d)
Final depth
53.
For this profile, cutter radius compensation is used
a)
G 41
b)
G42
c)
Either G 41 or G 42
d)
none
54.
The command G 44 is used for
a)
CRC Left
b)
CRC Right
c)
Tool length Compensation +ve Direction
d)
Tool Length Compensation -ve Direction
55.
M 07 code denotes
a)
Coolant through tool ON
b)
Coolant ON
c)
Coolant Off
d)
Axis Clamp
56.
In Polar Co ordinate system Y specifies .
a)
Angle inclined
b)
Distance
c)
Radius
d)
None
57.
for this profile cutter radius compensation is use
a)
G 41
b)
G 42
c)
Either A or B
d)
None
58.
The term D denotes offset number.
a)
CRC
b)
Tool length offset number
c)
Wear parameter
d)
none
59.
In this block G00 X 100.0 Y 20.0, G represents .
a)
Block
b)
Word
c)
Address
d)
Data
60.
In this block G00 X 100.0 , 100 represents .
a)
Block
b)
Word
c)
Address
d)
Data
61.
In this block G00 X 100.0 Y 20.0, G00 represents .
a)
Block
b)
Word
c)
Address
d)
Data
62.
In this block G 01 G 41 X 10.0 Y 15.0 D 01 F 250, D indicates .
a)
Radius
b)
Diameter
c)
Angle
d)
All the above
63.
Which of the following code is sub program call ?
a)
M 98
b)
M 99
c)
G 98
d)
G 99
64.
Cutting speed is usually expressed in .
a)
m /min
b)
r.p.m
c)
rev / min
d)
none
65.
Feed rate is expressed in .
a)
mm / tooth
b)
mm / revolution
c)
mm / min
d)
all the above
66.
To unclamp the tool from spindle manually, mode is used .
a)
Edit
b)
Jog mode
c)
MDI mode
d)
Both B & C
67.
The preparatory code G 41 & G 42 comes under group.
a)
Modal group
b)
One shot G Code
c)
Both A & B
d)
None
68.
Sinumeric control system belongs to .
a)
Makino
b)
Hinumeric
c)
Siemens
d)
Mistubshi
69.
M03 S 2000, in this block S indicates .
a)
Cutting Speed
b)
Spindle Speed
c)
Feed rate
d)
None
70.
G 15 command is used for .
a)
Skip function
b)
Polar Co ordinate command cancel
c)
Polar co ordinate command
d)
Thread Cutting
71.
M14 command is used for .
a)
Spindle CCW & Coolant On
b)
Spindle CW & Coolant On
c)
Tool clamp
d)
Unclamp.
72.
APT is a .
a)
Programming language
b)
Reduces the job set up time
c)
Reduces the idle time during tool change
d)
All the above
73.
Delcam is software.
a)
Designing
b)
Manufacturing
c)
Analysis software
d)
All the above
74.
G 85 canned cycle is for .
a)
Peck Drilling
b)
Tapping
c)
Reaming
d)
None
75.
G 84 canned cycle is for .
a)
Peck Drilling
b)
Tapping
c)
Reaming
d)
None
76.
Miscellaneous code M 12 stands for .
a)
Tool Clamp
b)
Tool Unclamp
c)
Pallet Change
d)
Spindle CW & Coolant On
77.
Which of the following is a control system ?
a)
Fanuc
b)
Siemens
c)
Heidahain
d)
All the above
78.
M 65 Code is used for .
a)
X axis Mirror image On
b)
Y axis Mirror image On
c)
Z axis Mirror image On
d)
All axis Mirror image cancel
79.
M 68 command is used for .
a)
X axis Mirror image On
b)
Y axis Mirror image On
c)
Z axis Mirror image On
d)
All axis Mirror image cancel
80.
UMC Stands for .
a)
Universal Manufacturing Centre
b)
Universal Machining Co ordinate
c)
Universal Machining centre
d)
none
81.
Master Cam is software.
a)
Designing
b)
Manufacturing
c)
Analysis
d)
None
82.
For operation, M04 code is use
a)
Drilling
b)
Tapping
c)
Reaming
d)
Boring
83.
For operation, anticlockwise Spindle rotation is use
a)
Drilling
b)
Tapping
c)
Reaming
d)
Boring
84.
Expand FANUC .
a)
Feed Automated Numerical Under control
b)
Feed Automated Numerical control
c)
Fuji Automated Numerical Control
d)
Fujitsu Automated Numerical Control
Reset
