WorksheetsCad Standards & CAM
Total questions: 50
Worksheet time: 27mins
Objectives of Database Management
It reduces or eliminates redundant data
It integrates the existing data,
It provides security.
All of the above
IGES expression
Initial Graphics Exchange Specification
Initial Graphics Exchange Standard
Intiate Graphics Exchange Specification
None of the above
CAD Standards are mainly classified by three ways,
Graphics and computing standards
Data Exchange standards
Communication standards.
All of the above
IGES is the most popular format of the neutral file. True/False
True
False
Computer-aided Acquisition and Logistics Support (CALS) as a standard for --------------
Product Data Exchange
Data Exchange
All of the above
None of the above
GKS was developed in Europe and standardized in ----
1970
1975
1980
1985
------includes all types of display elements
GKS
PHIGS
IGES
STEP
– Its improved version of GKS & CORE.
PHIGS
IGES
STEP
GKS
North American Presentation level protocol syntax function(NPLAPS) is a function of
Basis of transferring data from computer to video display system
Basis of transferring data from computer to Audio system
Basis of transferring data from Video to video display system
Basis of transferring data from Audio to video display system
In IGES, Design Datas are
Colour
DImension
Mass Property Calculation
Topological Information
Shape based formats are
All data files are neutral files
This files do not have any software specific function.
It handles simple images as drafting & modelling.Ex: DXF, IGES
All of the above
Product data based format is having the following standards
Standard for transfer and exchange of product data
Product data defined interface(PDDI)
Standard product data exchange format(SDF).
Electronic Design interface format(EDIF)
All of the above
Geometric entities, 102 represent
Circular curve
Composite curve
Plane
Line
------------- is used to develop that a system’s processors could read and write common entities, making them symmetric.
Reflection Test
Transmission test
Loop back test
None of the above
--------------test determines the capabilities of the pre-processor and post –processor of the source and target system respectively.
Transmission test
Reflection test
Loop back test
None of the above
If there is a mistake in the----- file, it is very complicate to find the mistake and also correction.
IGES
STEP
DXF
None of the above
Main aims of ------ is to support data exchange, some structures of data sharing, as well as long-term data maintenance.
STEP
IGES
------ format has been developed and supported by Autodesk for use with the AutoCAD drawing files.
DXF
IGES
PDES
STEP
-------is being used extensively in view of its varied and better facilities for exchanging product model data
STEP
PDES
IGES
GKS
------ is used for transferring information between various CAD systems for modelling as well as drafting data
IGES
STEP
DXF
PDES
-------is used to standardise the graphic system calling procedures at the lowest level so that programmers and program can be easily migrated between different systems
GKS
DXF
IGES
STEP
CALS ( Computer Aided Acquisition and Logistic Support) is an US Department of Defense initiative with the aim of applying computer technology in Logistic support. True/False
True
False
STEP (Standard for the Exchange of Product model data) can be used to exchange data between CAD, Computer Aided Manufacturing (CAM) , Computer Aided Engineering (CAE) , product data management/enterprise data modeling (PDES) and other CAx systems.
True
False
---- file format was meant to provide an exact representation of the data in the standard CAD file format.
DXF (Drawing / Data Exchange Format)
GKS
--------is located between the GKS method and the graphical workstations.
CGI
VDM
VDI
NC machine tool has a main unit, which is known as ----Unit.
Machine Control
Main Control
All of the above
None of the above
In CNC, High speed spindle is
> 20,000 rpm
> 600 ipm
< 0.0001" accuracy
IN NC power drives, rarely used systems are
Electric motor
Hydraulic Drive
Pneumatic Drive
BLU is the minimum length distinguishable by the control unit. True/False
True
False
G00 is
Rapid Linear Positioning
Linear Feed Interpolation
DWELL
G33 is
Thread cutting
Scaling Off
Scaling On
G76 is
Fine Boring
Boring cycle
Back boring cycle
M01 is Spindle forward. True/False
False
True
M04 is spindle reverse. True/False
True
False
----- is programming stop & rewind
M30
M00
M01
M10
CNC have ---- when compared to DNC
Low processing power
High processing power
------manage the information distribution to the number of machines.
DNC
CNC
------ is an integral part of the machine.
CNC
DNC
---- transferring machining instruction.
CNC
DNC
----- facilitate the remote control.
DNC
CNC
Machine tool is the main components of a numerical control system, which executes the operations. True/False
True
False
Co-ordinate system is based on
Left hand rule
Right hand rule
-------: drill cycle, ream cycle, bore cycle, mill cycle, clearance plane.
Cycle function
Machining Parameters
------spindle on/off, tape rewind, spindle rotation direction, pallet change, clamps control, etc.
Miscellaneous control:
Spindle
Coolant
CNC refers
Computer numerical control
Conventional numeric control
Direct numeric control
DNC is
One way communication
Two way communication
Three way communication
Which part of the system allows the user to interact with the complier?
Memory
Translator
Communication processor
None of the above
DNC means
Using one computer to control several machines
Using Several computer to control one large machines
A typical NC system has which of the following components?
Controller
Tape input
Machine tool
All of the above
None of the above
What is a process variable?
Manipulated variable
A Controlled variable
A process parameter that changes value
All of the above
