Description : In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The corner points of the island are represented by (0, 0), (0, 30), (50, 30) and (50, 0). By applying cutter radius right ... , 5), (5, 5) d.(5, 5), (45, 5), (45, 25), (5, 25), (5, 5)
Last Answer : a.(-5, 0), (-5, 35), (55, 35), (55,-5), (-5,-5)
Description : In CNC machining tool radius compensation turning the left mode ON programming contourdone by a.G40 b.G41 c.G42 d.G43
Last Answer : b.G41
Description : For CNC machining skilled part programmers are needed. a.TRUE b.FALSE c. d.
Last Answer : a.TRUE
Description : In CNC systems multiple microprocessors and programmable logic controllers work a.in parallel b.in series c.one after the other d.for 80% of the total machining time
Last Answer : a.in parallel
Description : CNC machining centres do not include operations like a.milling b.boring c.welding d.tapping
Last Answer : c.welding
Description : Which of the following code is used to return to a reference point? a.G23 b.G28 c.G14 d.G19
Last Answer : b.G28
Description : Digit 5 in Opitz system is for_________ a.Part class b.Main shape c.Additional holes, teeth and forming d.Plane surface machining
Last Answer : c.Additional holes, teeth and forming
Description : Digit 4 in Opitz system is for_________ a.Part class b.Main shape c.Rotational machining d.Plane surface machining
Last Answer : d.Plane surface machining
Description : Digit 3 in Opitz system is for_________ a.Part class b.Main shape c.Rotational machining d.Plane surface machining
Last Answer : c.Rotational machining
Description : Digit 2 in Opitz system is for_________ a.Part class b.Main shape c.Rotational machining d.Plane surface machining
Last Answer : b.Main shape
Description : Digit 1 in Opitz system is for_________ a.Part class b.Main shape c.Rotational machining d.Plane surface machining
Last Answer : a.Part class
Description : The following code will produce dwell for a specified time… a.G18 b.G65 c.G45 d.G04
Last Answer : d.G04
Description : The rotation axis that is perpendicular to the xy plane and passes through the pivot pointis known as a.Rotation b.Translation c.Scaling d.Shearing
Last Answer : a.Rotation
Description : The machine tool, in which calculation and setting of the operating conditions like depth ofcut, feed, speed are done during the machining by the control system itself, is called a.Computer Numerical Control System b.Direct Numerical Control System c.Machining Center System d.Adaptive Control System
Last Answer : d.Adaptive Control System
Description : In the process of Selective Laser Sintering, raw material used is in the form of ______ a.machining wax b.foam core c.powder d.rubber
Last Answer : c.powder
Description : Machining is never used for rapid prototyping because it takes too long. a.TRUE b.FALSE c. d.
Last Answer : b.FALSE
Description : Which of the following is not an example of additive manufacturing? a.Fused-deposition-modeling b.Electron beam machining c.SLS d.Injection molding
Last Answer : d.Injection molding
Description : n an NC machining operation, the tool has to be moved from point (5, 4) to point (7, 2) alonga circular path with centre at (5, 2). Before starting the operation, the tool is at (5, 4). The G and N codes for this motion ... 0 I5.0 J2.0 c.N010 GO1 X7.0 Y2.0 I5.0 J2.0 d.N010 GOO X7.0 Y2.0 I5.0 J2.0
Last Answer : b.N010 GO2 X7.0 Y2.0 I5.0 J2.0
Description : Which one of the process is subtractive prototyping? a.5 axis CNC Milling b.Fused Deposition Modeling c.Multi-Jet Modeling d.Stereolithography Apparatus
Last Answer : a.5 axis CNC Milling
Description : The STL files translate the part geometry from a CAD system to________ a.CNC machine b.VMC machine c.RP machine d.CAPP machine
Last Answer : c.RP machine
Description : The lost motion in CNC machine tool is on account of a.Backlash in gearing b.Wind-up of drive shafts c.Deflection of machine tool members d.All the above
Last Answer : a.Backlash in gearing
Description : In the CNC machine which device used to hold the workpiece? a.Automatic pallet changer b.Automatic work part positioner c.A & B both d.None of the above
Last Answer : c.A & B both
Description : In which machine we get feedback? a.Lathe machine b.NC machine c.CNC machine d.Milling machine
Last Answer : c.CNC machine
Description : Automatic tool change in CNC Machine code a.M05 b.M06 c.M07 d.M09
Last Answer : b.M06
Description : Maximum spindle speed limitation code in CNC Machine a.G90 b.G91 c.G92 d.G93
Last Answer : c.G92
Description : In CNC programming …….. is commonly used canned cycle for Stock removal cycle a.G71 b.G72 c.G73 d.G74
Last Answer : d.G74
Description : Repetitive CNC machine operations conveniently performing and execute with onecommand instead of programming of series of individual move called ….. a.Common Cycle b.Incremental Programming c.Canned Cycle d.None of the above
Last Answer : c.Canned Cycle
Description : A CNC Lathe is usually a machine tool with Z axes is….. a.Line Joining origin and vertical movement b.Line perpendicular to Y axis c.Both A & B d.Line Joining Chuck centre & tail stock centre
Last Answer : d.Line Joining Chuck centre & tail stock centre
Description : In a CNC program block, N05 GO1 G91 G33 X20 Z-40 K5……, K refer to a.Depth of cut b.Pitch c.Multiple Threading Cycle d.Feed
Last Answer : b.Pitch
Description : In CNC Program M98 is refer to…… a.CANCEL Subroutine b.Call Sub-Program c.Call Subroutine d.CANCEL Sub-Program
Last Answer : b.Call Sub-Program
Description : In CNC Program M03 is refer to…… a.Spindle ON in Clockwise rotation b.Spindle ON in Counter Clockwise rotation c.Spindle OFF in Clockwise rotation d.Spindle OFF in Counter Clockwise rotation
Last Answer : a.Spindle ON in Clockwise rotation
Description : In a CNC program block, N05 GO1 G91 G33 X20 Z-40……, G33 refer to a.Peck Drilling b.Counter Boring c.Thread Cutting d.Grooving
Last Answer : c.Thread Cutting
Description : ……… is a group of words or coded instruction for the NC/CNC system to execute aparticular movement. a.Sequence b.Address c.Code d.Block
Last Answer : d.Block
Description : In how many ways CNC machine tool systems can be classified? a.2 b.3 c.4 d.5
Last Answer : b.3
Description : Which of the following is not the advantage of CNC machines? a.Higher flexibility b.Improved quality c.Reduced scrap rate d.Improved strength of the components
Last Answer : d.Improved strength of the components
Description : Computer will perform the data processing functions in a.NC b.CNC c.DNC d.None of the mentioned
Last Answer : b.CNC
Description : In a CNC program block, N02 GO2 G91 X40 Z40††, GO2 and G91 refer to a.circular interpolation in counter clockwise direction and incremental dimension b.circular ... in clockwise direction and incremental dimension d.circular interpolation in clockwise direction and absolute dimension
Last Answer : c.circular interpolation in clockwise direction and incremental dimension
Description : During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0the type of tool motion will be a.circular Interpolation – clockwise b.circular Interpolation – counter clockwise c.linear Interpolation d.rapid feed
Last Answer : a.circular Interpolation – clockwise
Description : In Opitz system, 2nd digit indicates a.Type and Shape b.External shape and external shape elements c.External plane surface finishing d.Auxiliary hole and gear teeth
Last Answer : b.External shape and external shape elements
Description : The actual thickness of plane strain element is . a.very large b.very small c.assumed by software d.any of the above
Last Answer : a.very large
Description : When a thin plate is subjected to loading in its own plane only, the condition is called _ a.plane stress b.plane strain c.zero stress d.zero strain
Last Answer : a.plane stress
Description : A triangular plane stress element has how many degrees of freedom? a.3 b.4 c.5 d.6
Last Answer : d.6
Description : The ___________ is used to create a surface using curves that form closed boundaries a.ruled Surface b.plane Surface c.coons patch d.surface of Revolution
Last Answer : c.coons patch
Description : In modeling of a tabulated cylinder, the plane of the curve is _______ a.along the curve b.normal to the curve c.along the axis of the cylinder d.perpendicular to the axis of the cylinder
Last Answer : d.perpendicular to the axis of the cylinder
Description : The is used to create a surface using curves that form closed boundaries. a.ruled Surface b.plane Surface c.coons patch d.surface of Revolution
Description : From the following, which is an axisymmetric surface? a.Plane Surface b.Ruled Surface c.Surface of Revolution d.All of the above
Last Answer : c.Surface of Revolution
Description : Which of this is compulsory for 2D reflection? a.Reflection plane. b.Origin c.Reflection axis d.Co-ordinate axis.
Last Answer : c.Reflection axis
Description : Which of the following is NOT true?Image formed by reflection through a plane mirror is a.of same size b.same orientation c.is at same distance from the mirror d.virtual
Last Answer : b.same orientation
Description : Where online can I purchase used CNC machining equipment?
Last Answer : You can purchase used CNC machining equipment at www.usedmachinerysales.com. Another good website is www.industrialmachinery.com
Description : What are the factors considered while selecting the components for machining on CNC machines?
Last Answer : Following are the factors to be considered in selecting components of CNC machines? 1. High precision and repeatability. 2. Reliability. 3. Efficiency -To meet the requirement of high precision. ... should be such that removal of swarf is easy and the chips do not fall on the slideways.