Quiz 2 Flashcards by Kristine Nguyen

Metal forming is possible on metals and alloys which are—-
A) Brittle B) Ductile C) Malleable D) Both B & C

Both B & C

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By hot rolling of an ingot, a square cross section area produced above 225 Cm2 is
called A) Billet B) Bloom C) Sheet D) Plate

Bloom

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A slab refers to a hot rolled ingot with a cross sectional area greater than —
A) 100 Cm2 B) 225 Cm2 C) 16 Cm2 D) 150 Cm2

100 Cm2

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A rolled product having thickness less than 6 mm is called.
A) Plate B) Slab C) Sheet D) Billet

Sheet

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Metal forming processes are —— deformation processes
A) Elastic B) Plastic C) Bulk D) Combination

Plastic

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A rolled product having thickness less than 6 mm and width less than 300 mm is
A) Sheet B) Plate C) Slab D) Strip

Strip

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Hot working processes are carried out at ——- temperatures.
A) Melting B) Room C) Above re-crystallization D) Below re-crystallization

Above re-crystallization

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For metal alloys the re-crystallization temperature —- of melting temperatures.
A) 1/2 B) 1/3 C) 2/3 D) 3/4

1/2

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For pure metals the re-crystallization temperature is —- of melting temperatures
A) 1/2 B) 1/3 C) 2/3 D) 3/2

1/3

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If a metal is subjected to strain hardened, it’s re-crystallization temperature
A) Increases B) Decreases C) Remains same D) Not affected

Decreases

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The re-crystallization temperature is room temperature for
A) Cast Iron B) Aluminium C) Copper D) Lead

Lead

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The process in which tubes are produced without joint is
A) Deep drawing B) Spinning C) Seamless tubing D) Rolling

Seamless

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It is possible to get ——- in Cold Working.
A) Better Surface finish B) Close Dimensions C) Hard parts D) All

All

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Alluminium structural shapes are mostly produced in ——-
A) Rolling B) Extrusion C) Forging D) Spinning

Extrusion

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Pre-heating of the tools is done in —— forming.
A) Hot B) Cold C) Isothermal D) All

Isothermal

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Friction in metal forming processes causes ——
A) Defects B) Force increase C) Retarded work flow D) All

All

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——— is tendency of the two surfaces in relative motion to adhere to each other
rather than slide.
A) Pasting B) Sticking C) Bonding D) Attaching

Sticking

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Bulk deformation is possible in —— rolling process.
A) Hot B) Cold C) Both Hot & Cold D) Isothermal

Hot

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The process widely used to produce structural shapes and rails in large quantities
from all metals.
A) Rolling B) Extrusion C) Forging D) Casting

Rolling

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Ingot is converted into Blooms and Billets by ——— process.
A) Forging B) Extrusion C) Rolling D) All

Rolling

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Cold rolling of thin sheets of high strength metal is done with — rolling mill.
A) Two high B) Three high C) Four high D) Cluster

Cluster

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To prevent fracture, the rolling sequence has to be interrupted for ——
A) Case Hardening B) Normalizing C) Annealing D) Peening

Annealing

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In three high rolling mill, the middle roller is rotated by —–
A) Separate motor B) Friction C) Upper roller D) Lower roller

Friction

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The rolling mill generally used for sheet rolling with less power is —–
A) Four high B) Three high C) Two high D) All

Four high

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------- Rolling mill is called Tandem mill A) Cluster B) Continuous C) Four high D) Three high

Continuous

The rolling mill used to reduce slabs to coiled hot rolled strips in a single pass --- A) Cluster B) Continuous C) Planetary D) Four high

Planetary

Beams, I – sections that require rolled (finishes) edges are rolled in ---- mill. A) Cluster B) Universal C) Four high D) Continuous

Universal

Two pairs of roller whose axes are perpendicular to each other in --- rolling mill. A) Universal B) Cluster C) Four high D) Continuous

Universal

Donut shaped workpiece is placed between rollers in --- type of rolling mill. A) Skew B) Thread C) Ring D) Transverse

Ring

---- rolling mills are called Roll Forging Mills. A) Transverse B) Skew C) Thread D) Ring

Transverse

-------- rolling mill is used to produce steel balls for ball bearings. A) Transverse B) Skew C) Ring D) Cluster

Skew

The defect in rolling due to poor material ductility at the rolling temperature. A) Wavy edge B) Zipper cracks C) Edge cracks D) Alligatoring

Edge cracks

At one point along the contact of the rolls, the velocity of strip and rolls are same and it is called----- A) Rigid point B) No slip point C) Neutral point D) Both B & C

Both B & C

Extrusion in which fluid pressure is applied to deform the metal ---- A) Impact B) Indirect C) Hydrostatic D) Direct

Hydrostatic

In extrusion “center burst” defect is due to ---- A) High die angle B) Low extrusion ratio C) Impurities in work D) All

All

The defect in rolling due to non-uniform deformation during rolling is ----- A) Wavy edge B) Zipper cracks C) Edge cracks D) Alligatoring

Alligatoring

The velocity of strip is maximum in rolling at ------ the rollers. A) Entering B) Middle of contact C) Exit of D) at 1/3 contact

Exit of

Roll moves faster than the strip ------- neutral point. A) Before B) at the C) after D) All times

Before

Maximum reduction in thickness of work in rolling depends on -------- A) Roll diameter B) Friction C) Strength of material D) Both A & B

Both A & B

Cemented carbide material is used for die making in cold extrusion when ----- required. A) Long die life B) Dimensional control C) High production rates D) All

All

With ---- rolls more reduction is possible in rolling process. A) Smooth B) Rough C) Semi-finished D) Hard

Rough

If sticking occurs in rolling, the coefficient of friction is approximately ----- A) 0.1 B) 0.2 C) 0.4 D) 0.7

0.7

Extrusion is a simple ----- metal forming process. A) Compressive B) Tensile C) Both A & B D) Shear

Compressive

The direction of movement of both ram and work material is same in ---- type of extrusion. A) Direct B) Indirect C) Hydrostatic D) Both A & C

Both A & C

Tooth paste tubes are produced by ------ extrusion. A) Hydrostatic B) Impact C) Direct D) All

Impact

The forming process used to produce frames, doors, windows in automotive industry is ---- A) Rolling B) Forging C) Spinning D) Extrusion

Extrusion

Cold extrusion forging is a similar extrusion process as ----- A) Impact B) Hydrostatic C) Direct D) Indirect

Impact

The extrusion defect “center burst” is also called --- A) Center cracking B) Arrow head fracture C) Chevron cracking D) All

All

Forging applies ---- forces to deform the material. A) Tensile B) Compressive C) Shear D) All

Compressive

Formation of sink hole in the end of a billet in extrusion is called ---- defect. A) Chevron crack B) Arrow head C) Fishtailing D) All

Fishtailing

Process used to reduce the diameter of a tube or a rod at the end, to create tapered section is ---- A) Swaging B) Radial forging C) Roll forging D) Both A & B

Both A & B

Barreling effect is a common problem in ---- forging. A) Closed die B) Open die C) Hammer D) Press

Open die

Oxidation and scaling on workpiece is a common problem in ---- forging. A) Cold B) Warm C) Hot D) All

Hot

Forging dies are made with ----- material. A) Mild steel B) Cast Iron C) Carbon Steel D) Tool Steel

Tool Steel

The forging process extensively used for production of bolt and screw heads is – A) Swaging B) Cold heading C) Upset forging D) Both B & C

Both B & C

Multiple impact blows are required in ---- forging. A) Hammer B) Press C) Closed die D) Cold

Hammer

Die life is more in ---- type of forging. A) Press B) Hammer C) Hot D) Warm

Press

In ----- forging one of the die is tilted to a preset angle. A) Radial B) Roll C) Orbital D) Swaging

Orbital

The cold working process to create very fine and intricate details on the work surface is --- A) Sizing B) Coining C) Embossing D) Swaging

Coining

To eliminate problems in forging super alloys and materials like Titanium, the forging process is ---- A) Roll forging B) Isothermal forging C) Swaging D) Cold forging.

Isothermal forging

The cold working process to accurately produce dimensional tolerance is --- A) Embossing B) Coining C) Sizing D) All

Sizing

In metal spinning ---- serves as support for the workpiece. A) Die B) Special tools C) Discs D) Mandrel

Mandrel

In metal spinning the material is subject to ---- forces during deformation. A) Tensile B) Compressive C) Shear D) Both A & B

Both A & B

Bottom of large tanks, hoppers are produced by --- A) Rolling B) Forging C) Spinning D) All

Spinning

Sheet metal parts of all kinds are produced by ---- A) Coining B) Embossing C) Sizing D) All

Embossing

Theoretically maximum possible reduction in one pass in wire drawing is ---- A) 30% B) 36% C) 63% D) 45%

63%

Wire drawing process is similar to ------ process. A) Rolling B) Extrusion C) Forging D) Spinning

Extrusion

Spokes for wheels are produced by ----- process. A) Extrusion B) Forging C) Wire drawing D) Spinning

Wire drawing

The major process parameters in wire drawing ---- A) Reduction in cross section B) Die angle C) Friction D) All

All

The operation that is used to reduce the diameter or wall thickness of tubes is --- A) Tube drawing B) Tube sinking C) Seamless tubing D) Both A & B

Both A & B

For fine wire drawing the die material used is --- A) Diamond B) Tool steel C) Cast steel D) All

Diamond

Pressworking operations involve ---- of parts from sheet metal. A) Cutting B) Forming C) Both A & B D) Bulk deformation

Both A & B

------- is sheet metal forming operation. A) Squeezing B) Blanking C) Notching D) All

Squeezing

------ is sheet metal cutting operation. A) Squeezing B) Bending C) Drawing D) None

None

Vessel shaped parts are produced in --- press working operation. A) Bending B) Drawing C) Squeezing D) Blanking

Drawing

Squeezing operation includers ======= A) Coining B) Sizing C) Riveting D) All

All

---- press forming process produces cup like cylindrical parts. A) Deep drawing B) Squeezing C) Spinning D) Bending

Deep drawing

In deep drawing maximum amount of deformation occurs in ----- A) Bottom of the cup B) Walls of cup C) Flange D) All

Walls of cup

Material for deep drawing should have the property ---- A) Malleability B) Ductility C) Toughness D) All

Ductility

Materials used in deep drawing are ------ A) Aliminium B) Copper C) Brass D) All

All

The deep drawing defect that produces cup walls having peaks and valleys is --- A) Wrinkling B) Tearing C) Earing D) Scratching

Earing

The deep drawing defect that produces crack in the cup near the base is ----- A) Wrinkling B) Tearing C) Earing D) Scratching

Tearing

In ----- press working operation, there is no change in the thickness of the sheet metal. A) Bending B) Stretching C) Deep drawing D) All

Bending

The concept of spring back is related to ------- process. A) Stretching B) Deep drawing C) Bending D) Spinning

Bending

Spring back can be taken care by ------ A) Over bending B) less bending C) Bottoming D) Both A & C

Both A & C

-------type of bending uses cantilever loading. A) V – bending B) U – bending C) Edge bending D) All

Edge bending

The most common sheet bending method is - ---- A) V – bending B) U – bending C) Edge bending D) All

V - bending

Large contoured parts are produced in ------- process. A) Spinning B) Stretch forming C) Deep Drawing D) Bending

Stretch forming

The most common stretch forming presses are oriented in ---- position. A) Horizontal B) Vertical C) Inclined D) All positions

Vertical

Wing panels on aircraft are produced by ----- process. A) Stretch forming B) Deep drawing C) Bending D) Spinning

Stretch forming

The sheet metal cutting operation that produces required holes is ---- A) Blanking B) Piercing C) Shearing D) Notching

Piercing

The cutting operation in which the hole is partially cut and then one sike is bent down is --- A) Notching B) Slitting C) Lancing D) Nibbling

Lancing

Press cutting operation which substitute to blanking is ---- A) Lancing B) Slitting C) Punching D) Nibbling

Nibbling

Plate that is used to remove the metal sheet from a cutting or non-cutting punch is – A) Stripper B) Knockout C) Punch plate D) All

Stripper

The mechanism used to eject the workpiece from die is called ---- A) Stripper B) Knockout C) Die plate D) Pitman

Knockout

Center of pressure is an imaginary point in the blank at which resultant force due to ----- acts. A) Tension B) Compression C) Shear D) All

Shear

------ should be provided between die and punch to facilitate press working. A) Penetration B) Clearance C) Draft D) Angular

Clearance

During cutting action the punch moves into sheet to a certain thickness of sheet before fracture occurs which is called ----- A) Penetration B) Clearance C) Angular relief D) Shearing

Penetration

More clearance is provided between punch and die while working with ---- materials. A) Ductile B) Tough C) Hard D) All

Hard

Provision of shear on punch or die will ---- the forces in sheet cutting. A) Increases B) Decreases C) Neutralize D) No affect

Decreases