Description : Classify metals and non-metals. Write any two uses of it.
Last Answer : Classification of metals: Metals: 1. Ferrous. example: cast iron, stainless steel 2. Non ferrous. example: Al and its alloys, Cu and its alloys Classification of non metals: 1. Plastic 2. Rubber ... It is used for seals, bushes , glands etc. Used for vessel and reaction kettle lining. Etc.
Description : Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.
Last Answer : (c) phosphorus, potassium, sulphur, calcium
Description : Explain the effects of following chemical elements on iron. i) Copper ii) Phosphorus iii) Manganese
Last Answer : Effect on iron: i) Copper: it improves the resistance to atmospheric corrosion. It strengthens steel. It may be added to improve formability. It improves pains adhesion ii) ... Manganese:it increase tensile strength, abrasion resistance, hardenability and toughness . it decrease weldability.
Description : Give the chemical composition forstainlesssteel, Tungsten steel, Nickel and Manganese steel.
Last Answer : Chemical composition of: 1.Stainless steel: Min 12 % chromium 12 to 30 % Cr 4 to 25 % Ni 2.Tungsten steel: 18 % Tungsten (W) 4 % Cr 1 % vanadium 0.7 % carbon Small amount of Si , S , P ,Mn , Fe. 3. ... 4.Manganese steel: (e.g. C-Mn steel) 0.15 % C 1.4 % Mn 0.218 % Si 0.007 % S
Description : Write about the corrosion of metals by water, steam and soil in detail.
Last Answer : Corrosion (i)by water: physical configuration of the system hardness of water, salts, chlorides, and dissolved gases such as oxygen, carbon dioxide, and sulphur dioxide. Presence of suspended ... is more corrosion is less. If dissolved salts more, conductivity is more and corrosion is more.
Description : Name two thermal properties of engineering materials.
Last Answer : Thermal properties of engineering materials: 1. Melting point 2. Specific heat 3. Heat capacity (specific heat capacity) 4. Thermal expansion 5. Thermal conductivity 6. Thermal stability 7. Thermal shock resistance 8. Heat resistance/thermal resistance
Description : Describe the crystal structure of glass using Bragg’s law.
Last Answer : Crystal structure of glass by Bragg's law: The general relationship between the wavelength of the incident x ray, angle of incidence and spacing between the crystal planes of atoms is known as Braggg's law, expressed mathematically ... to occur: 2d sin θ = nλ This is known as Bragg's law.
Description : Which one of the following non-metals is not a poor conductor of electricity? (1) Sulphur (2) Selenium (3) Bromine (4) Phosphorus
Last Answer : (2) Selenium Explanation: Selenium is a non-metallic element; it is not a very good conductor of heat and electricity.
Description : Explain chemical reactivity of iron with acid.
Last Answer : Chemical reactivity of iron with acid. Definition -Chemical reactivity is the ability of a material to combine with other materials such as water , air , acids , steam etc. (i) Iron (mild Steel) ... with hydrochloric acid producing ferric chloride and hydrogen gas. 2Fe + 6HCl -----> 2FeCl3 + 3H2
Description : List the types of iron.
Last Answer : The types of iron are : 1) Pig iron 2) Wrought iron 3) Cast iron 4) Pure iron (butte iron)
Description : Explain the effects of following chemical elements on iron. 1) Chromium 2) Nickel 3) Silicon.
Last Answer : Effect on Iron: 1) chromium: Cr increases the hardenability of steel while there is a minimal effect on the ductility. Cr is normally added to steel for increasing oxidation resistance, and ... form of graphite results in a softer iron, reduces shrinkage, lowers strength, and decreases density.
Description : Give the effect of any two chemical elements on iron.
Last Answer : Effect of any two chemical elements on iron. Carbon : It increases tensile strength and hardness but lowers ductility and weldability. Chromium : It increases hardenability. It increases ... It improves machinability but decreases ductility and weldability. Its content is limited to 0.05%.
Description : Name the types of iron.
Last Answer : Types of iron are:. 1) Pig iron 2) Wrought iron 3) Cast iron 4) Pure iron (butte iron)
Description : Explain chemical reactivity of iron with air.
Last Answer : Chemical reactivity of iron with air: Chemical reactivity is the ability of a material to combine with the other materials . Chemical reactivity of iron / mild steel (MS) with air MS react ... -off from the surface thereby exposing the fresh metal surface for further reaction with air and water.
Description : The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is (A) Alumina (B) Silica gel (C) Platinum (D) Nickel
Last Answer : (A) Alumina
Description : Which of the following metals can deposit copper from copper sulphate solution? (1) platinum (2) Mercury (3) Iron (4) Gold
Last Answer : (3) Iron Explanation: The iron displaces copper from its salt, to make iron sulfate solution and deposit a thin coating of metallic copper on the surface of the metal. In general, any metal higher than copper in the "electromotive series" will displace copper from copper sulfate solution.
Description : Which of the following metals can deposit copper from copper sulphate solution ? (1) Platinum (2) Mercury (3) Iron (4) Gold
Last Answer : Iron
Description : Differentiate between metal and non-metal.
Last Answer : Metals Non-metals While metals are good conductors of electricity and heat non-metals are poor conductors of electricity and heat metals are ductile Non metals are not ductile ... are malleable Non metals are brittle Metals are opaque Non metals are transparent
Description : What is the capital of the country with the worlds largest deposits of gold manganese and platinum?
Last Answer : YeahYou are my fireThe one desireBelieve when I sayI want it that wayBut we are two worlds apartCan't reach to your heartWhen you sayThat I want it that wayTell me whyAin't nothin' but a heartacheTell me whyAin't ... are (you are, you are, you are)Don't wanna hear you sayAin't nothin' but a More
Description : Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making
Last Answer : ANSWER: B
Description : Manufacturing Silica is used in _____. A. Plastic Making B. Glass Making C. Iron Making D. Wood Making
Description : Explain composition of stainless steel.
Last Answer : Chemical composition of Stainless steel: Min 12 % chromium 12 to 30 % Cr 4 to 25 % Ni Stainless steel 316: Cr = 16 - 18 %, Ni = 10-14 % , Mo= 2-3 %, C= 0.08 %, Mn = 2 % , Si= 1%, Stainless steel ... 18 % Tungsten (W) 4 % Cr 1 % vanadium 0.7 % carbon Small amount of Si , S , P ,Mn , Fe.
Description : Write down any two purposes of alloy steel. Explain any one method of preparation of alloy.
Last Answer : Purpose of alloy steel 1. To improve corrosion resistance 2. To enhance wear resistance 3. To improve toughness 4. To enhance tensile strength 5. To improve grain size Method of preparation ... and then they are mixed together by application of heat and pressure to obtain the final product.
Description : Explain different engineering properties of silicon carbide. Also discuss its uses.
Last Answer : Silicon carbide: Properties: Density = 3.2 g/cu.cm M.P = 2800 deg C Hardness = 9 Mohs Modulus of elasticity = 6.5 High wear resistance Excellent ... bulletproof vests Bearings Semiconductors wafer processing equipment Light emitting diode Cutting tools and burner nozzles.
Description : Describe the procedure to estimate the density of any liquid.
Last Answer : Density of liquid: Density of liquid can be determined using specific gravity bottle. Procedure: First determine the weight of the density bottle(w1) when it's empty. Then fill it with the liquid ... the mass of the liquid divided by its volume density = m/v. = (w2-w1)/ volume
Description : Explain requirement of thermal insulation to chemical process equipment with example.
Last Answer : Requirement of Thermal insulation: 1. Thermal insulation is the reduction of heat transfer. 2. Thermal insulation is used to prevent excessive heat loss. 3. It is used to minimize the ... . 4. In refrigeration, refrigerator consists of a heat pump and a thermally insulated compartment.
Description : Describe the classification of steel.
Last Answer : Classification of steels: 1. Based on carbon Low carbon steel (0 %) : it is cheap, it has good tensile strength, ductility, it is malleable. Used for structural section Medium carbon steel ... ) 2. Based on de-oxidation practice: Killed steel Semi killed steel Rimmed steels Capped steels
Description : Write down the factors determining the choice of material to avoid corrosion.
Last Answer : Factors determining the choice of material to avoid corrosion: 1. Resistance to corrosion in given environment 2. Operating condition such as temperature, pressure and flow rate. 3. Mechanical ... cost, replacement cost 7. Expected life 8. Material selection based on sound economic analysis.
Description : Differentiate ceramic substances based on properties.
Last Answer : Classification of ceramics: 1.Glasses: Glasses Ceramic glasses 2.Natural ceramics: Bones Rocks and minerals 3.Traditional ceramics: White wares Structural clay products ... Dense SiC Nitride ceramics: silicon nitride Silicon aluminium oxynitride Aluminium nitride
Description : Explain the mechanism of corrosion.
Last Answer : Dry corrosion Mechanism: When a metal is exposed to air it gets oxidized by loosing its valence electrons & reduction of oxygen take place M+n/4 (o^2) => M^n+ + O^2- At point of ... when the environment is alkaline / basic or neutral, and contains more oxygen, OH- ions will be given out.
Description : Write on ductility and malleability of material.
Last Answer : Ductility Ductility is the ability of a material to deform plastically without fracture under tensile load. Because of this property , materials can be drawn out into fine wire without fracture ... Gold and silver are highly malleable. Malleable metals usually bend and twist in various shapes.
Description : Describe thermal stability and thermal expansion of material.
Last Answer : Thermal Expansion : Thermal expansion is the increase in the volume of a material a the temperature is increased. It is usually expressed as a fractional change in dimensions of ... material will not be destroyed/degraded/decomposed by heat under high operating temperatures of the application.
Description : Discuss thermochemistry of chemical reactions.
Last Answer : Thermochemistry of chemical reactions. Thermochemistry is the study of the heat energy associated with chemical reactions and/or physical transformations. A reaction may release or absorb ... favorable or unfavorable. Endothermic reactions absorb heat, while exothermic reactions release heat.
Description : Define polymerisation reaction.
Last Answer : Polymerisation reaction: (i) The process by which the monomer molecules are linked to form a large molecular weight polymer molecule is called polymerization. Or (ii) Any process in which relatively small molecules called monomers combine chemically to produce a very large chainlike molecule.
Description : List the uses of ceramic in chemical industry.
Last Answer : Ceramics are used for following engineering applications: 1. Cutting io and dies 2. Molten metal filters 3. Bearings 4. Sealing rings 5. Bushes 6. Fuel injection components 7. Spark ... Filters 30. Rotors and gears 31. Electrode materials 32. Precise instrument parts 33. Grinding media
Description : Describe dielectric strength of material.
Last Answer : Dielectric strength of material: Dielectric strength is the ability of a dielectric material of specified thickness to withstand at high voltage without breaking down. It is a measure of the strength of ... strength can withstand at high voltage. It is expressed in the unit of kV/cm.
Description : Define yield stress.
Last Answer : Yield stress: (i) The yield strength or yield stress is defined as the stress at which a material begins to deform plastically Or (ii) stress is the amount of force/energy that is being exerted on a material object divided by its cross-sectional area.
Description : Define biomaterials.
Last Answer : Biomaterials: (i) A biomaterial is any material that has been engineered to interact with biological systems for a medical purpose (a therapeutic or a diagnostic) Or (ii) ... use for therapeutic , prosthetic and diagnostic applications without affecting the living organism and its components.
Description : List out the types of crystal structure.
Last Answer : Types of crystal structures. (i) Atomic atructure (ii) Nano sturucture (iii) Microsturcture (iv) Macrostructure
Description : Explain the mechanism of wet corrosion in details.
Last Answer : Mechanism of wet corrosion: wet corrosion of metals occurs through electron transfer, involving two processes, oxidation and reduction. The metal, where electrons are lost, is called the anode the reaction that ... evolution type of wet corrosion 2. Oxygen absorption type of wet corrosion :
Description : Differentiate between addition and condensation polymerization process.
Last Answer : Differentiate between addition and condensation polymerization: Addition polymerization Condensation polymerization Produces by addition of monomers Produces by condensation of monomers Monomers must have ... multiple of monomers e.g. Polypropylene e.g. Bakelite
Description : Describe the procedure to calculate the density of air.
Last Answer : Procedure to calculate the density of air: Measure the mass of the empty balloon. a) Calculate mass of air in the inflated balloon in kg. b) Calculate the volume of the inflated balloon in m3. ... and relative humidity. The density of dry air can be calculated using the ideal gas law,
Description : Describe different thermal properties of an engineering material.
Last Answer : Thermal properties of Engg. Materials: 1.Temperature: Temperature is the degree to measure hotness and coldness. Temperature is a physical quantity expressing hot and cold. 2.Thermal conductivity: ... the amount of heat needed to raise the temperature of one kilogram of mass by 1 kelvin.
Description : Explain the condensation polymerization for phenyl formaldehyde.
Last Answer : Condensation polymerization for phenol formaldehyde: Phenol formaldehyde resins are synthetic polymers obtained by the reaction of phenol with formaldehyde(Bakelite). used for the production of molded products including ... gives a methylene bridge, and the second forms an ether bridge:
Description : List any four properties of thermosetting polymers.
Last Answer : Properties of thermosetting polymers: 1.Very poor elasticity 2.sronger attractive forces between chains 3. not soluble in organic compounds 4.can not be remoulded 5. these polymers produces by condensation polymerization
Description : Explain the methods of corrosion prevention.
Last Answer : Method of corrosion prevention: 1. Choice of material 2. Proper design and fabrication of components 3. Use of high purity metal 4. Special heat treatment 5. Modification of ... tightly bonded alloy coating which act as protection.it has lower initial cost, sustainability and versatility.
Description : Explain any four mechanical properties of an Engineering material.
Last Answer : Mechanical properties of Engg. Materials 1.Elasticity: Ability of a deformed material body to return to its original shape and size when the forces causing the deformation are removed. A body with ... referred to stiffness or temper, or to resistance to bending, scratching, abrasion, or cutting.
Description : List any four properties of ceramics.
Last Answer : Properties of ceramics: High Strength. High Fracture Toughness. High Hardness. Excellent Wear Resistance. Good Frictional Behavior. Anti-Static
Description : Explain organic and inorganic insulation with examples.
Last Answer : Organic and inorganic insulation: Organic insulation: Organic insulation materials are mainly polyurethane foam, polystyrene board, phenolic foam . organic insulation materials mainly from petroleum ... antifreeze, anti-aging and excellent performance, low prices , high level fire protection.