Strong and ductile materials (a) Polymers (b) Ceramics (c) Metals (d) Semiconductors

Strong and ductile materials (a) Polymers (b) Ceramics (c) Metals (d) Semiconductors
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(c) Metals
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Description : Figure out the odd statement about ceramics in the following (a) Good insulators of heat and electricity (b) Usually less desire than metals (c) Ductile in nature (d) Contains both metallic and nonmetallic elements  

Last Answer : (c) Ductile in nature

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Description : Which Theories Of Failure Are Used For? (a) Ductile Materials (b) Brittle Materials?

Last Answer : For ductile materials, theories of failure used are maximum shear stress theory and maximum energy of distortion theory; For brittle materials, the theory of maximum principal stress and maximum strain are used.

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Description : List At Least Two Factors That Promote The Transition From Ductile To Brittle Fracture?

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Description : Give One Example Each Of The Following Proportion Of Materials – Dimensional, Physical, Technological And Mechanical?

Last Answer : Roughness, enthalpy, toughness and hardness respectively.

Whether Individual Components In Composite Materials Retain Their Characteristics Or Not?

Description : Whether Individual Components In Composite Materials Retain Their Characteristics Or Not?

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Description : Specific Strength Of Materials Is Very High When They Are In Fibre Size But Lower When They Are In Bar Form - Why?

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Description : What Are Orthotropic Materials?

Last Answer : Orthotropic materials are a special class of isotropic materials which can be described by giving their properties in three perpendicular directions ex: wood; composites.

What Is The Difference Between The Isotropic And An Isotropic Materials?

Description : What Is The Difference Between The Isotropic And An Isotropic Materials?

Last Answer : If a material exhibits same mechanical properties regardless of loading direction, it is isotropic. ex:homogeneous cast materials. Materials lacking this property are anisotropic.

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Last Answer : (a) Optical fiber

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Last Answer : (a) Cost 

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Last Answer : A material is known as allotropic aur polytropic if it exists in several forms at a different temperature.

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How Oxygen Gas Can Be Removed From Steel During Melting? What Are Fully Killed Steel?

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Description : For Which Parts The Wahl Factor And Lewis Factor Is Used?

Last Answer : Wahl factor and Lewis factor is used for springs and gears respectively.

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Description : What Is The Name Of Solid Solution Of Carbon In Alpha-iron And Delta Iron?

Last Answer : Ferrite and Austenite respectively.

Give One Example Of Metal Classified As Per Structure As Bcc, Fcc, Hcp And Ccp?

Description : Give One Example Of Metal Classified As Per Structure As Bcc, Fcc, Hcp And Ccp?

Last Answer : Examples of BCC, FCC, HCP and CCP structures: BCC (Body Centred Cubic) structure – molybdenum; FCC (Face Centred Cubic) structure – Aluminum; HCP (Hexagonal Close Packed) structure – Zinc; CCP (Cubic Close Packing) structure – Copper.

Define Ceramic?

Description : Define Ceramic?

Last Answer : Ceramic is a solid formed by the combination of metallic and non-metallic elements.

What Does The Alloy Designation Fg 250 Indicate?

Description : What Does The Alloy Designation Fg 250 Indicate?

Last Answer : FG 250 alloy designation indicates Grey cast iron with a tensile strength of 250 MPa.

What Is The Common Element Between The Brass And Bronze Metal Alloys?

Description : What Is The Common Element Between The Brass And Bronze Metal Alloys?

Last Answer : Copper.

While Normal Carburizing And Nit Riding Surface Treatments Increase Fatigue Strength, Excessive Treatment May Decrease The Fatigue Strength. Why?

Description : While Normal Carburizing And Nit Riding Surface Treatments Increase Fatigue Strength, Excessive Treatment May Decrease The Fatigue Strength. Why?

Last Answer : Normal carburizes/nits riding treatments increases volume due to phase transformation at the surface and introduce residual compressive surface stress and thus increases fatigue strength. By excessive treatment, the ... in the regions of the high tensile stress and lead o early fatigue failure.

Distinguish Between Creep And Fatigue?

Description : Distinguish Between Creep And Fatigue?

Last Answer : Creep is low and progressive deformation of a material with time under a constant stress at high-temperature applications. Fatigue is the reduced tendency of material to offer resistance to applied stress under repeated or fluctuating loading condition.

Why Fatigue Strength Decreases As Size Of A Part Increases Beyond Around 10mm?

Description : Why Fatigue Strength Decreases As Size Of A Part Increases Beyond Around 10mm?

Last Answer : The perfection of material conditions is possible at lower sizes, and as size increases, it is not possible to attain a uniform structure of the material.

Why Is It That The Maximum Value Which The Residual Stress Can Reach Is The Elastic Limit Of The Material?

Description : Why Is It That The Maximum Value Which The Residual Stress Can Reach Is The Elastic Limit Of The Material?

Last Answer : A stress more than the elastic limit, with no external force to oppose it, we relieve itself by plastic deformation until it reaches the value of the yield stress.

Which Element Is Added In Steel To Increase Resistance To Corrosion?

Description : Which Element Is Added In Steel To Increase Resistance To Corrosion?

Last Answer : Chromium.

What Is The Percentage Of Carbon In Cast Iron?

Description : What Is The Percentage Of Carbon In Cast Iron?

Last Answer : 2.5%.

What Is Curie Point?

Description : What Is Curie Point?

Last Answer : Curie point is the temperature at which ferromagnetic materials can no longer be magnetized by outside forces.

What Are The Principal Constituents Of Brass?

Description : What Are The Principal Constituents Of Brass?

Last Answer : Principal constituents of brass are copper and zinc.

Mention Two Types Of Dislocations?

Description : Mention Two Types Of Dislocations?

Last Answer : Dislocation refers to a break in the continuity of the lattice. In an edge dislocation, one plane of atoms gets squeezed out. In screw dislocation, the lattice atoms move from their regular ideal positions.

Explain The Effects Of Alloying Chromium And Nickel In Stainless Steel.?

Description : Explain The Effects Of Alloying Chromium And Nickel In Stainless Steel.?

Last Answer : The addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place.

What Properties Are Needed To Be Considered For Application Calling For Following Requirements? I) Rigidity. Ii) Strength Of No Plastic Deformation Under Static Load. Iii) Strength To Withstand Overload Without Fracture.

Description : What Properties Are Needed To Be Considered For Application Calling For Following Requirements? I) Rigidity. Ii) Strength Of No Plastic Deformation Under Static Load. Iii) Strength To Withstand Overload Without Fracture.

Last Answer : i) Reliability – elastic modulus and yield strength. ii) Strength (for no plastic deformation under static loading) – yield point. iii) Strength (overload) – Toughness and impact resistance. iv) Wear resistance – Hardness. v) Reliability and safety – Endurance limit and yield.

A Plain Carbon Steel Has Brinell Hardness Number (bhn) Of 180. What Are The Values Of Rc, Vhn And Ultimate Strength?

Description : A Plain Carbon Steel Has Brinell Hardness Number (bhn) Of 180. What Are The Values Of Rc, Vhn And Ultimate Strength?

Last Answer : Rc = BHN/10 = 18, VHN = BHN = 180 Ultimate strength = 3.48 × BHN MPa = 620 MPa.

Democratic material (a) Diamond (b) Titanium (c) Iron (d) Gold

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Last Answer : (c) Iron

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Description : Detrimental property of a material for shock load applications (a) High density (b) Low toughness (c) High strength (d) Low hardness  

Last Answer : (b) Low toughness

Presently most used metal in the world (a) Aluminium (b) Gold (c) Steel (d) Silver

Description : Presently most used metal in the world (a) Aluminium (b) Gold (c) Steel (d) Silver

Last Answer : (c) Steel 

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Description : Pick the composite from the list (a) Wood (b) Steel (c) Nylon (d) Mica

Last Answer : (a) Wood 

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Description : First metal known to be used by man (a) Iron (b) Bronze (c) Silver (d) Aluminium 

Last Answer : (b) Bronze

First material known to be used by man (a) Cotton (b) Bronze (c) Iron (d) Rock

Description : First material known to be used by man (a) Cotton (b) Bronze (c) Iron (d) Rock 

Last Answer : (d) Rock 

Ceramics are good (A) insulators. (B) conductors. (C) superconductors. (D) semiconductors.

Description : Ceramics are good (A) insulators. (B) conductors. (C) superconductors. (D) semiconductors.

Last Answer : (A) insulators.

Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by sharing of electrons is present in all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Last Answer : Option A

Combination of metals and ceramics are called (A) Metalloy (B) Cermets (C) Pellets (D) Non-crystalline ceramics

Description : Combination of metals and ceramics are called (A) Metalloy (B) Cermets (C) Pellets (D) Non-crystalline ceramics

Last Answer : (B) Cermets

Transistors are made from (a) Plastic (b) metals (c)insulators (d) doped semiconductors

Description : Transistors are made from (a) Plastic (b) metals (c)insulators (d) doped semiconductors

Last Answer : d) doped semiconductors

What are the raw materials used in the manufacture of ceramics?

Description : What are the raw materials used in the manufacture of ceramics?

Last Answer : Clay like kaolinite and bentonite, Flint, White clay, Quartz and feldspar.

Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material? (A) Slag cement (B) Glasses (C) Porcelain/Potteries (D) Teflon

Description : Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material? (A) Slag cement (B) Glasses (C) Porcelain/Potteries (D) Teflon

Last Answer : (D) Teflon

Polymerics and ceramics membrane materials

Description : Polymerics and ceramics membrane materials

Last Answer : Polymerics and ceramics membrane materials:  Polymeric membrane materials. All polymers can be used as barrier or membrane material but the chemical and physical properties differ so much that only ... membranes.  Eg Aluminium oxide / Alumina, Silicon carbide, Titanium dioxide / Titania

hich of the following statements is correct? (a) All metals are ductile. -Science

Description : hich of the following statements is correct? (a) All metals are ductile. -Science

Last Answer : Answer is (c) Generally, metals are ductile.

Which of the following statements about the physical properties of metal is not correct? (a) All metals are solid except mercury (b) Most metals are hard except sodium and potassium (c) Metals are not malleable (d) Most metals are ductile

Description : Which of the following statements about the physical properties of metal is not correct? (a) All metals are solid except mercury (b) Most metals are hard except sodium and potassium (c) Metals are not malleable (d) Most metals are ductile

Last Answer : Ans:(c)

(3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning "light", and generally implies radiance, gloss, or brilliance. Metals in general have high electrical conductivity, high thermal conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Description : (3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word ... conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Last Answer : Cloud is a colloidal dispersion of – (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air

Skin depth phenomenon is found in which materials? a) Insulators b) Dielectrics c) Conductors d) Semiconductors

Description : Skin depth phenomenon is found in which materials? a) Insulators b) Dielectrics c) Conductors d) Semiconductors

Last Answer : c) Conductors