In a complex phenomenon and maybe be caused by nonuniform deformation during rolling or by the presence of deflects in the original cast billet.

Heading processing can be carried out cold, warm, or hot; they are be performed on machines called

Is essentially an upsetting operation, usually performed at the end of a round rod or wire in order to produce a larger cross-section.

Consist of pressing a hardened punch, having a particular tip geometry, into the surface of block of metal.

A process similar to roll forging

Is a process in which a blank is forged into a shape with a tool that forms the blank in several small steps

The dies are heated to the same temperature as that of the hot workpiece.

A solid rod or tube is subjected to radial impact forces by a set of reciprocating dies.

Is generally defined as the capability of a material to undergo deformation without cracking

Punching a number of holes in a sheet

Leaving a tab without removing any material

Shearing the sheet into two or more pieces

Removing pieces ( or various shapes) from the edges

Is a process of bending the edges of sheet metals, usually to 90 deg.

Involves joining two edges of sheet metal by hammering

Is the process whereby green compacts are heated in controlled – atmosphere furnace to a temperature below the melting point, but sufficiently high to allow bonding of the individual particles

Were introduced in 1960’s. they typically 70% aluminum oxide and 30% titanium carbide

Of all known materials, the hardest substance is ______. It has low friction, high wear resistance and the ability to maintain a sharp cutting edge.

To enlarge a hole or cylindrical cavity made by a previous process or to produce circular internal grooves.

To produced a regular shaped roughness on cylindrical surfaces, as in making knobs.

Because of friction between the specimen and the platens, the specimen’s cylindrical surface bulges ; this effect is called..

Is usually defined as resistance to permanent indentation.

Test involves pressing a steel or tungsten – carbide ball 10 mm diameter against a surface , with a load of 500 kg, 1500 kg, or 3000 kg.

This test measures the depth of penetration instead of the diameter of the indention.

Formerly known as the diamond pyramid hardness test, uses a pyramid – shaped diamond indenter and a load ranges from 1kg to 120 kg

Uses to measure the hardness of rubber, plastics, and similar soft and elastic non – metallic materials

Is a phenomenon in which carbon atoms in steels segregates to dislocations , thereby pinning them and, in this way, increasing the resistance to dislocation movement.

Is a phenomenon characterized by high permeability and permanent magnetization that are due to alignment of iron, nickel, and cobalt atoms into domains.

Exhibited by some materials, such as quartz crystals and some ceramic materials , such as cubic ferrites.

In this structure, graphite exists largely in the form of flakes. When it is broken, the fracture path is along the graphite flakes and has, therefore gray, sooty appearance.

The steel is formed into desired shapes within controlled ranges of temperature and time to avoid formation of non martensitic transformation products.

Improves strength and hardness at elevated temperatures..

A place in which metal parts are cut to the size required and put together to form mechanical units of machines, the machine so made to be used directly or indirectly in the production of the necessities and luxuries of civilization.

A metal-turning machine tool in which the work, while revolving on a horizontal axis, is acted upon by a cutting tool which is made to move slowly (feed) in a direction more or less parallel to the axis of the work (longitudinal feed), or in a direction of right angles to the axis of work (cross feed)

A machine tool used mainly for producing holes in metal.

A machine which is ordinarily used for finishing flat or partly curved surfaces of metal pieces few in number and not usually over a foot or too long.

A machine tool in which an abrasive wheel is used as a cutting tool to obtain a very high degree of accuracy and a smooth finish on metal parts, including soft and hardened steel.

A file which is thick, rectangular-shaped file with parallel edges.

A file which is tapered in thickness and of uniform width. This is used for filing slots and keyways.

Which of the following is not belong to standard shapes of file?

One of the three basic ways of using a file which is done by pushing the file lengthwise, straight with or slightly diagonal to the workpiece.

One of the three basic ways of using a file which consists of stroking the file against the revolving workpiece held in the lathe.

One of the three basic ways of using a file which is performed by grasping the file at end and pushing and drawing across the workpiece.

A hand tool which is commonly used for cutting or twisting wire and chipping small parts and not to be used for tightening or loosening bolts and nuts.

A type of pliers which is used for cutting wires and holding flat round stock.

A type of pliers which is used in electrical works for cutting heavy or light wires or for cutting small nails.

A type of pliers which is used for cutting and holding fine wire. This is also useful in reaching tight places.

Which of the following is a primary forming process?

Which of the following is not a machining process?

The joints produced by this method are as strong as the parent metal.

Which one of the following is a finishing process?

Which of the following process affects the changes in properties of materials?

The system used for mass production of identical parts within specified limits of sizes for selection of components at random is known as:

Alloys are extensively used in industry because they are:

Which of the following is the most abundantly used material in industry?

Wrought iron contains a maximum of which of the following?

Pig iron is produced by reduction of iron ore in a:

Which of the following are the main alloying elements present in stainless steel?

Along with chromium and vanadium the main constituent of high speed steel is which of the following?

Grey cast iron gives grey fracture due to the presence of which of the following?

Copper is the parent metal of brass. Which of the following is the other metal present in brass?

Gun metal contains 5 to 10 percent of which of the following materials?

Y-alloy is an alloy of aluminum and which of the following metals?

Inconel contains 80 % nickel and 14 % chromium. The other metal present in inconel is:

Monel contains mainly with traces of iron and manganese. The main alloying element of monel is:

Bearing materials should posses which of the following?

Which of the following is the trade name of polypropylene?

The following instrument can be used for subscribing lines parallel to the edges of a part:

Which of the following is the use of surface gauge?

The thickness of a thin sheet can be accurately checked with the help of:

V-block is used in mechanical engineering workshop to check which of the following?

A ratchet screw is provided on a micrometer screw gauge to:

Adjusting nut is provided on a micrometer screw gauge to:

External taper of a job can be measured accurately with help of

Internal dovetail taper can be measured by which of the following?

Combination set is used to:

The measuring accuracy of the following instruments is least.

For filing brass or bronze pieces, the following type of file is preferred.

The cleaning of a file is done by which of the following?

Thin metal pieces can be cut with saw by:

During the filing operation, the following precaution must be observed.