MMP Quiz 2

Metal forming is possible on metals and alloys which are:

D) Both B & C

By hot rolling of an ingot, a square cross section area produced above 225 Cm^2 is called:

Bloom

A slab refers to a hot rolled ingot with a cross sectional area greater than:

100 Cm^2

A rolled product having thickness less than 6 mm is called:

Sheet

A rolled product having thickness less than 6 mm and width less than 300 mm is:

Strip

Metal forming processes are - - - - - - deformation processes:

Plastic

Hot working processes are carried out at temperatures:

Above re-crystallization

For metal alloys, the re-crystallization temperature - - - - of melting temperatures:

1/2

For pure metals, the re-crystallization temperature is - - - - of melting temperatures:

1/3

If a metal is subjected to strain hardening, its re-crystallization temperature - - - - :

Decreases

The re-crystallization temperature is room temperature for - - - - :

Lead

The process in which tubes are produced without joint is - - - -:

Seamless Tubing

Aluminium structural shapes are mostly produced in - - - - :

Extrusion

It is possible to get - - - - - in Cold Working:

All

Pre-heating of the tools is done in - - - - - forming:

Isothermal

Friction in metal forming processes causes - - - - -:

All

- - - - - is tendency of the two surfaces in relative motion to adhere to each other rather than slide is called:

Sticking

The process widely used to produce structural shapes and rails in large quantities from all metals is:

Rolling

Bulk deformation is possible in - - - - - - rolling processes:

Hot

To prevent fracture, the rolling sequence has to be interrupted for - - - - - :

Annealing

Ingot is converted into Blooms and Billets by - - - - - Process:

Rolling

In a three high rolling mill, the middle roller is rotated by - - - - - :

Friction

The rolling mill generally used for sheet rolling with less power is - - - - - :

Four High

Cold rolling of thin sheets of high strength metal is done with - - - - rolling mill:

Cluster

- - - - - - Rolling mill called Tandem mill:

Continuous

The rolling mill used to reduce slabs to coiled hot rolled strips in a single pass - - - - :

Planetary

Beams, I - sections that require rolled (finishes) edges are rolled in - - - - mill:

Universal

Two pairs of roller whose axes are perpendicular to each other are in - - - - - rolling mill:

Universal

- - - - - Rolling mill used to produce steel balls for ball bearings:

Skew

- - - - Rolling mills called Roll Forging Mills are:

Transverse

Donut shaped workpiece is placed between rollers in - - - - type of rolling:

Ring

The defect in rolling due to poor material ductility at the rolling temperature is:

Edge Cracks

The defect in rolling due to non-uniform deformation during rolling is - - - - :

Alligatoring

The velocity of strip is maximum in rolling at - - - - the rollers:

Exit

At one point along the contact of the rolls, the velocity of strip and rolls are same and it is called - - - - - :

Both B & C

Roll moves faster than the strip - - - - - neutral point:

Before

Maximum reduction in thickness of work in rolling depends on - - - - - -:

Both A & B

With ______ rolls, more reduction is possible in rolling process.

Rough

If sticking occurs in rolling, the coefficient of friction is approximately - - - - :

0.7

Extrusion is a simple - - - - metal forming process:

A) Compressive

The direction of movement of both ram and work material is same in - - - - - type of extrusion:

D) Both A & C

Toothpaste tubes are produced by - - - - - - extrusion:

Impact

Extrusion in which fluid pressure is applied to deform the metal is - - - - - :

Hydrostatic

The forming process used to produce frames, doors, windows in the automotive industry is - - - - :

Extrusion

Cold extrusion forging is a similar extrusion process as - - - - - - :

Impact

In extrusion, 'center burst' defect is due to - - - - - - :

All

The extrusion defect 'center burst' is also called - - - - - - :

All

Formation of sinkhole in the end of a billet in extrusion is called - - - - - defect:

Fishtailing

Cemented carbide material is used for die making in cold extrusion when - - - - - required:

All

Forging applies - - - - - forces to deform the material:

Compressive

Oxidation and scaling on workpiece is a common problem in - - - - forging:

Hot

Barreling effect is a common problem in - - - - - forging:

Open Die

Forging dies are made with - - - - material:

Tool Steel

Multiple impact blows are required in - - - - - forging:

Hammer

Die life is more in - - - - - type of forging:

Press

The forging process extensively used for production of bolt and screw heads is –

D) Both B & C

Process used to reduce the diameter of a tube or a rod at the end, to create tapered section is ---

D) Both A & B

In ----- forging one of the die is tilted to a preset angle.

Orbital

To eliminate problems in forging super alloys and materials like Titanium, the forging process is ----

Isothermal Forging

The cold working process to accurately produce dimensional tolerance is ---

Sizing

The cold working process to create very fine and intricate details on the work surface is ---

Coining

In metal spinning ---- serves as support for the workpiece.

Mandrel

In metal spinning the material is subject to ---- forces during deformation.

D) Both A & B

Bottom of large tanks, hoppers are produced by ---

Spinning

Sheet metal parts of all kinds are produced by:

Embossing

The theoretical maximum possible reduction in one pass of a wire drawing is:

63%

Wire drawing process is similar to ------ process.

Extrusion

Spokes for wheels are produced by ----- process.

Wire Drawing

The major parameters in wire drawing are:

All

The operation used to reduce the diameter or wall thickness of tubes:

D) Both A & B

For fine wire drawing, the die material used is:

Diamond

Pressworking operations involve ---- of parts from sheet metal.

C) Both A & B

------- is sheet metal forming operation.

Squeezing

------ is sheet metal cutting operation.

None

Vessel shaped parts are produced in --- press working operation.

Drawing

Squeezing operation includes:

All

------ press forming process produces cup like cylindrical parts.

Deep Drawing

In deep drawing, the maximum amount of deformation occurs in the:

Walls of Cup

Material for deep drawing should have the property ----

Ductility

Materials used in deep drawing are ------

All

The deep drawing defect that produces cup walls having peaks and valleys is:

Earing

The deep drawing defect that produces cracks in the cup near the base is:

Tearing

In ----- press working operation, there is no change in the thickness of the sheet metal.

Bending

The concept of spring back is related to ------- process

Bending

Spring back can be taken care of by:

D) Both A & C

-------type of bending uses cantilever loading.

Edge Bending

The most common sheet bending method is - ----

V - Bending

Large contoured parts are produced in ------- process.

Stretch Forming

Large contoured parts are produced in ------- process.

Vertical

Wing panels on aircraft are produced by ----- process.

Stretch Forming

The sheet metal cutting operation that produces required holes is ----

Piercing

The cutting operation in which the hole is partially cut and then one sike is bent down is ----

Lancing

Press cutting operation which substitute to blanking is:

Nibbling

Plate that is used to remove the metal sheet from a cutting or non-cutting punch is –

Stripper

The mechanism used to eject the workpiece from die is called ----

Knockout

Center of pressure is an imaginary point in the blank at which resultant force due to --

Shear

------ should be provided between die and punch to facilitate press working.

Clearance

During cutting action, the punch moves into the sheet to a certain thickness before fracture occurs, which is called:

Penetration

More clearance is provided between punch and die while working with ---- materials.

Hard

Provision of shear on punch or die will ---- the forces in sheet cutting.

Decreases