Machining · Machine Tools and Machining · GATE PI

Turning, drilling, boring and milling are commonly used machining operations. Among these, the operation (s) performed by a single point cutting tool ...

Which one of the following statements related to grinding process is INCORRECT?

Match the following: ...

Reaming is a process used for

A steel bar $$200$$ $$mm$$ in diameter is turned at a feed of $$0.25$$ $$mm/rev$$ with a depth of cut of $$4$$ $$mm.$$ The rotational speed of the wor...

The binding material used in cemented carbide cutting tools is

Grinding ratio is defined as

Which of the following powder production methods produces spongy and porous particles?

Which of following gear manufacturing processes is based on generation principle.

Reaming is primarily used for achieving

The final finishing process for the surface plate made of cast iron which is used as a reference surface is

In the manufacture of twist drills, the shank is joined to the body of the drill using

In a shaper machine, the mechanism for tool feed is

Tool life in the case of a grinding wheel is the time

The cutting portion of a drill is to be welded to its shank. The process best suited for this is

The drawing shows a machined shaft. The purpose of providing rounded grooves at $$M$$ and $$N$$ is to ...

The flanks of teeth of rack-type gear cutter used for cutting involute gear profiles are:

Which one of the following is not a synthetic abrasive material

In Whitworth quick return mechanism (used in shapers) the velocity of the $$ram$$ is maximum at

The material most commonly used for manufacturing of machine tool beds is

A grinding wheel is said to be glazed if

Reamers have usually even number of teeth so that the cutting forces on teeth are properly balanced.

A blind hole is better tapped with a tap having

In a grinding wheel marked with $$AA-48-L-7-V-25, L$$ refers to

The teeth of both external and internal spur gears can be cut on

Amount of energy consumption per unit volume of metal removal is maximum in

Reamer is designed to have even number of flutes to:

In turning operation the surface finish can be improved by decreasing

Abrasives are not used in

A schematic diagram of peripheral milling is shown in the Figure. If $$t$$ is the depth of cut and $$d$$ is the diameter of the milling cutter, then...

In a slab milling operation, a cutter of $$75$$ $$mm$$ diameter with sufficient width is used to remove $$5$$ $$mm$$ thick material from a $$200$$ $$m...

In drilling operation, a twist-drill of $$30$$ $$mm$$ diameter with point angle of $$118$$ degrees is used. If the $$CNC$$ command issued to execute t...

An $$HSS$$ drill of $$20mm$$ diameter with $$5mm$$ cone height is used to drill a through hole in a steel work-piece of $$50mm$$ thickness. Cutting sp...

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 cut of $$1$$ $$mm.$$ The faci...

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 cut of $$1$$ $$mm.$$ The faci...

In a shaping process, the number of double strokes per minute is $$30$$ and the quick return ratio is $$0.6,$$ If the length of the stroke is $$250mm,...

In a single pass drilling operation, a through hole of $$15$$ $$mm$$ diameter is to be drilled in a steel plate of $$50mm$$ thickness. Drill spindle s...

During orthogonal machining of a mild steel specimen with a cutting tool of zero rake angle, the following data is obtained: Uncut chip thickness $$=...

Match the following materials with their most appropriate application: ...

During orthogonal machining of a mild steel specimen with a cutting tool of zero rake angle, the following data is obtained: Uncut chip thickness $$=...

The number of defective produced by a six sigma process (in Parts per million) is

The quick return mechanism used in shaper has rocker arm drive of length $$200mm.$$ If the crank radius is $$50mm$$ and the offset between crank cente...

Blind hole $$10mm$$ diameter, $$50mm$$ deep are being drilled in steel block, drilling spindle speed is $$600rpm$$, feed $$0.2$$$$mm/rev,$$ point angl...

Blind hole $$10mm$$ diameter, $$50mm$$ deep are being drilled in steel block, drilling spindle speed is $$600rpm$$, feed $$0.2$$$$mm/rev,$$ point angl...

One brand of milling machine has the following two index plates supplied along with the indexing head: Plate 1: $$15, 16, 17, 18, 19, 20$$ hole circl...

Match List - $${\rm I}$$ (Milling problem) with List - $${\rm I}$$$${\rm I}$$ (Probable causes) and select the correct answer using the codes given be...

Match List - $${\rm I}$$ (Cutting tools) with List - $${\rm I}$$$${\rm I}$$ (Features) and select the correct answer using the codes given below the l...

A non standard thread of pitch $$3.175$$ $$mm$$ is to be cut on a lathe having lead screw of pitch $$6$$ $$mm.$$ A change gear set provided with the l...

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 job must have ...

A $$\phi $$ $$20$$ $$mm$$ through hole is to be drilled in a $$30$$ $$mm$$ thick plate using a double fluted, $${120^ \circ }$$ lip angle drill. The d...

Consider the following statements: The helical flute in a twist drill provides the necessary $$1.$$ Clearance angle for the cutting edge. $$2.$$ Ra...

Match the mechanism with Machine ...

Match list - $${\rm I}$$ (machine tool) with list - $${\rm I}$$$${\rm I}$$ (machine tool part) ...

The purpose of helical grooves in a twist drill is to $$1.$$ Improve the stiffness $$2.$$ Save a tool material $$3.$$ Provide space for chip remova...

A $$31.8MM$$ $$HSS$$ drill is used to drill a hole in cast iron block $$100$$ $$mm$$ thick at cutting speed of $$n20m/min$$ and feed $$0.3min/rev.$$ I...

Match GROUP - I with GROUP - II ...

A side and face cutter $$125mm$$ diameter has $$10$$ teeth. It operates at a cutting speed of $$14m/min$$ with a table traverse $$100mm/min.$$ The fee...

A work-piece of $$2000$$ $$mm$$ length and $$300$$ $$mm$$ width was machined by a planning operation with the feed set at $$0.3$$ $$mm/stroke.$$ If t...

Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are $$5$$ $$mm$$ and $$25$$ $$mm$$ res...

If the index crank of a dividing head is turned through one complete revoluation and $$10$$ holes in a $$30$$ hole circle plate, the work piece turns ...

A drilling machine has to be designed with $$8$$ spindle speeds ranging approximately between $$120$$ to $$1200$$ $$rpm.$$ The $${5^{th}}$$ spindle sp...

The base of a brass bracket has to be rough ground to remove the unevenness. The $$4$$ wheels available in the store. The appropriate wheel is

A milling cutter having $$8$$ teeth is rotating at $$100$$ $$rpm.$$ The work piece feed is set at $$40mm/min$$. The feed per tooth is

The diameter and rotational speed of a job are $$100mm$$ and $$500$$ $$rpm$$ respectively. The high spots (chatter marks) are found at a spacing of $$...

For cutting double start screw threads of pitch $$2.0$$ $$mm$$ on a lathe, the thread cutting tool should have a feed rate of

Match the following ...

If the number of double strokes per minute in a shaper is calculated by ($$0.643\, \times \,$$ Cutting speed in $$mm/min$$) / length of the stroke in ...