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GATE PI

Machining

Machine Tools and Machining

Previous Years Questions

Marks 1

More
Turning, drilling, boring and milling are commonly used machining operations. Among these, the operation (s) performed b...
GATE PI 2017
Which one of the following statements related to grinding process is INCORRECT?
GATE PI 2015
Reaming is a process used for
GATE PI 2014
Match the following: ...
GATE PI 2014
A steel bar $$200$$ $$mm$$ in diameter is turned at a feed of $$0.25$$ $$mm/rev$$ with a depth of cut of $$4$$ $$mm.$$ T...
GATE PI 2013
Grinding ratio is defined as
GATE PI 2011
The binding material used in cemented carbide cutting tools is
GATE PI 2011
Which of the following powder production methods produces spongy and porous particles?
GATE PI 2010
Which of following gear manufacturing processes is based on generation principle.
GATE PI 2007
Reaming is primarily used for achieving
GATE PI 2007
In the manufacture of twist drills, the shank is joined to the body of the drill using
GATE PI 2006
The final finishing process for the surface plate made of cast iron which is used as a reference surface is
GATE PI 2006
In a shaper machine, the mechanism for tool feed is
GATE PI 2005
Tool life in the case of a grinding wheel is the time
GATE PI 2005
The cutting portion of a drill is to be welded to its shank. The process best suited for this is
GATE PI 2004
The drawing shows a machined shaft. The purpose of providing rounded grooves at $$M$$ and $$N$$ is to ...
GATE PI 2003
The flanks of teeth of rack-type gear cutter used for cutting involute gear profiles are:
GATE PI 2003
Which one of the following is not a synthetic abrasive material
GATE PI 2003
In Whitworth quick return mechanism (used in shapers) the velocity of the $$ram$$ is maximum at
GATE PI 2001
The material most commonly used for manufacturing of machine tool beds is
GATE PI 1995
A grinding wheel is said to be glazed if
GATE PI 1995
Reamers have usually even number of teeth so that the cutting forces on teeth are properly balanced.
GATE PI 1995
A blind hole is better tapped with a tap having
GATE PI 1992
In a grinding wheel marked with $$AA-48-L-7-V-25, L$$ refers to
GATE PI 1992
Amount of energy consumption per unit volume of metal removal is maximum in
GATE PI 1991
The teeth of both external and internal spur gears can be cut on
GATE PI 1991
Reamer is designed to have even number of flutes to:
GATE PI 1990
In turning operation the surface finish can be improved by decreasing
GATE PI 1989
Abrasives are not used in
GATE PI 1989

Marks 2

More
A schematic diagram of peripheral milling is shown in the Figure. If $$t$$ is the depth of cut and $$d$$ is the diamet...
GATE PI 2017
In a slab milling operation, a cutter of $$75$$ $$mm$$ diameter with sufficient width is used to remove $$5$$ $$mm$$ thi...
GATE PI 2015
In drilling operation, a twist-drill of $$30$$ $$mm$$ diameter with point angle of $$118$$ degrees is used. If the $$CNC...
GATE PI 2015
An $$HSS$$ drill of $$20mm$$ diameter with $$5mm$$ cone height is used to drill a through hole in a steel work-piece of ...
GATE PI 2014
A disc of $$200$$ $$mm$$ outer and $$80$$ $$mm$$ inner diameter is faced at a feed of $$0.1$$ $$mm/rev$$ with a depth of...
GATE PI 2013
A disc of $$200$$ $$mm$$ outer and $$80$$ $$mm$$ inner diameter is faced at a feed of $$0.1$$ $$mm/rev$$ with a depth of...
GATE PI 2013
In a single pass drilling operation, a through hole of $$15$$ $$mm$$ diameter is to be drilled in a steel plate of $$50m...
GATE PI 2012
In a shaping process, the number of double strokes per minute is $$30$$ and the quick return ratio is $$0.6,$$ If the le...
GATE PI 2012
During orthogonal machining of a mild steel specimen with a cutting tool of zero rake angle, the following data is obtai...
GATE PI 2011
Match the following materials with their most appropriate application: ...
GATE PI 2011
During orthogonal machining of a mild steel specimen with a cutting tool of zero rake angle, the following data is obtai...
GATE PI 2011
The number of defective produced by a six sigma process (in Parts per million) is
GATE PI 2011
The quick return mechanism used in shaper has rocker arm drive of length $$200mm.$$ If the crank radius is $$50mm$$ and ...
GATE PI 2008
Blind hole $$10mm$$ diameter, $$50mm$$ deep are being drilled in steel block, drilling spindle speed is $$600rpm$$, feed...
GATE PI 2007
Blind hole $$10mm$$ diameter, $$50mm$$ deep are being drilled in steel block, drilling spindle speed is $$600rpm$$, feed...
GATE PI 2007
Match List - $${\rm I}$$ (Cutting tools) with List - $${\rm I}$$$${\rm I}$$ (Features) and select the correct answer usi...
GATE PI 2005
Match List - $${\rm I}$$ (Milling problem) with List - $${\rm I}$$$${\rm I}$$ (Probable causes) and select the correct a...
GATE PI 2005
One brand of milling machine has the following two index plates supplied along with the indexing head: Plate 1: $$15, 1...
GATE PI 2005
Consider the following statements: The helical flute in a twist drill provides the necessary $$1.$$ Clearance angle fo...
GATE PI 2004
A $$\phi $$ $$20$$ $$mm$$ through hole is to be drilled in a $$30$$ $$mm$$ thick plate using a double fluted, $${120^ \c...
GATE PI 2004
A job of the shape shown in the figure below is to be machined on a lathe. The tool best suited for machining of this jo...
GATE PI 2004
A non standard thread of pitch $$3.175$$ $$mm$$ is to be cut on a lathe having lead screw of pitch $$6$$ $$mm.$$ A chang...
GATE PI 2004
Match the mechanism with Machine ...
GATE PI 2003
Match list - $${\rm I}$$ (machine tool) with list - $${\rm I}$$$${\rm I}$$ (machine tool part) ...
GATE PI 2003
The purpose of helical grooves in a twist drill is to $$1.$$ Improve the stiffness $$2.$$ Save a tool material $$3.$$...
GATE PI 2003
A side and face cutter $$125mm$$ diameter has $$10$$ teeth. It operates at a cutting speed of $$14m/min$$ with a table t...
GATE PI 2002
Match GROUP - I with GROUP - II ...
GATE PI 2002
A $$31.8MM$$ $$HSS$$ drill is used to drill a hole in cast iron block $$100$$ $$mm$$ thick at cutting speed of $$n20m/mi...
GATE PI 2002
A work-piece of $$2000$$ $$mm$$ length and $$300$$ $$mm$$ width was machined by a planning operation with the feed set ...
GATE PI 1993
If the index crank of a dividing head is turned through one complete revoluation and $$10$$ holes in a $$30$$ hole circl...
GATE PI 1992
Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are $$5$...
GATE PI 1992
A drilling machine has to be designed with $$8$$ spindle speeds ranging approximately between $$120$$ to $$1200$$ $$rpm....
GATE PI 1991
The base of a brass bracket has to be rough ground to remove the unevenness. The $$4$$ wheels available in the store. Th...
GATE PI 1990
A milling cutter having $$8$$ teeth is rotating at $$100$$ $$rpm.$$ The work piece feed is set at $$40mm/min$$. The feed...
GATE PI 1990
The diameter and rotational speed of a job are $$100mm$$ and $$500$$ $$rpm$$ respectively. The high spots (chatter marks...
GATE PI 1990
For cutting double start screw threads of pitch $$2.0$$ $$mm$$ on a lathe, the thread cutting tool should have a feed ra...
GATE PI 1990
Match the following ...
GATE PI 1989
If the number of double strokes per minute in a shaper is calculated by ($$0.643\, \times \,$$ Cutting speed in $$mm/min...
GATE PI 1989

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