Engineering Metallurgy Important Question Bank | PDF

Engineering Metallurgy Important Question Bank of First Section Topic Correct Question...

Engineering Metallurgy Important Question Bank of First Section Topic Correct Question Option A Option B Option C Option D No. Answer To understand the To understand What is the primary purpose of studying materials in To learn about To explore 1 behavior of the behavior of B engineering? historical events artistic creativity materials materials Which of the following is an example of a natural 1 Aluminum Glass Nylon Wood D material? Which property of a material describes its ability to 1 Hardness Brittleness Ductility Conductivity C deform without breaking? 1 What type of bond holds atoms together in a metal? Covalent bond Ionic bond Hydrogen bond Metallic bond D Which material property refers to the amount of force a 1 Elasticity Toughness Plasticity Conductivity B material can withstand without breaking? A material A mixture of A material that What does the term "composite material" refer to? A single type of made 1 two or more conducts C element from a single materials electricity substance Which material property is associated with a material's 1 Toughness Hardness Ductility Elasticity B ability to resist being scratched? Which type of material testing involves applying a Hardness 1 Fatigue testing Impact testing Tensile testing C gradually increasing load until the material breaks? testing Scanning Confocal What type of microscope uses electrons instead of Optical electron 1 microscope X-ray microscope B visible light for imaging? microscope microscope  Brinell Vickers Which hardness test involves measuring the depth of Rockwell hardness hardness Shore hardness 1 hardness test B penetration of a hardened steel ball? test test test Brinell Vickers Which hardness testing method uses a pyramid-shaped Rockwell hardness hardness Knoop 1 hardness test C diamond indenter? test test hardness test 1 Packing efficiency of body centered cubic structure is 0.68 0.74 0.7 0.78 A Amorphous Crystalline Solid Amorphous CrystallineSolutio 1 A glass is the most common example of ……... solution B Solid n 1 Bamboo and wood are nature made Composites Ceramics Polymers Metals A Which of the following crystal structures has the highest 1 BCC FCC HCP Diamond cubic B packing factor? Which of the following is NOT a typical type of etchant 1 Alcohol Acid solution Alkali solution Saline solution D used for sample preparation? The Brinell hardness test is most suitable for which type Large-sized 1 Hard metals Soft materials Brittle materials B of material? components Electromagnetic Ultrasonic Visible light Surface tension 1 The principle of Magna Flux testing is based on: A field interaction sound waves penetration measurements n phase diagrams, what is the point at which a metal 1 Eutectic point Triple point Solidus line Liquidus line A alloy changes from a liquid to a solid phase? Polymers, Steel, ceramics, Metals, ceramics, In general, the major classes of engineering materials Metals, ceramics, 1 composites, polymers, polymers, D are ……... copper metals aluminum composites, The Brinell testing method uses a steel ball of 1 26mm 1mm 10m 10mm D __________ diameter for testing purposes.  The penetrator in the Vickers hardness test is a pyramid 1 that is squarely based and has an included angle of 206° 15° 136° 23° C _______ Which of the following can the inspection process 1 Laps Cracks Seams Color D ‘magnaflux’ not detected? The smallest portion of a crystal which when repeated None of the 1 in different directions generates the entire crystal is Lattice points Crystal lattice Unit cell C mentioned called: In which of the following Bravais lattices, not all axial 1 Tetragonal Rhombohedral Orthorhombic Cubic B angles are right angles? How many parameters are used to characterize a unit 1 Six Three Two Nine A cell? 1 Which of the following has a HCP crystal structure? Tungeston Molybdenum Chromium Zinc D The axial relationship of a monoclinic crystal system is 1 a=b=c a=b≠c a≠b=c a≠b≠c D given as ___________ 1 What is the atomic packing factor of BCC structure? 0.54 0.68 0.74 0.96 B Body-centered Face-centered Hexagonal Body-centered 1 What is the crystal structure of ϒ iron? B cubic cubic closely packed tetrahedral All three states All three states All three states are All three states don’t exist and 1 What is a triple point? are not in A in equilibrium don’t exist are not in equilibrium equilibrium What is/are the phenomenon involved in phase Nucleation and 1 Nucleation Growth Fission D transformation? growth 1 Following compound is used for fine polishing? Aluminum oxide Nitric oxide Silicon carbide Iron oxide A Following property will be more in fine grained Corrosion Creep 1 Ductility Hardness A structure? resistance resistance  Petroleum Following penetrating liquid is used in a liquid Chlorine based Fluorine based 1 Water based carrier C penetration test? solvent solvent fluid Following non destructive testing is used to detect Liquid Eddy current 1 Ultrasonic test Radiography D change in composition of any material penetration test test Following methods of inspection uses high frequency of Ultrasonic 1 Penetrant test Radiography Pressure test D sound waves for the detection of flaws in the castings inspection Following types of rays is used in radiography for the 1 X- rays Infrared rays Ultraviolet rays Visible rays A inspection of castings? Following axis system is being satisfied by cubic crystal a = b = c, α = β = γ a ≠ b = c, α = β a = b ≠ c, α = β a = b = c, α ≠ β = 1 A system? = 90o = γ = 90o = γ = 90o ϒ = 90o Vicker’s hardness test differ from Brinell’s hardness test Materials to be Duration of 1 Type of indenter Load applied A in___________________ tested indentation If the load being applied is 2000kg, and the area of 25 kg per 20 kg per 80 kg per square 8 kg per square 1 impression is 250 Square millimetres, what is the Brinell square square D millimeter millimeter number of the test material? millimeter millimeter The rate at The temperature The which The change in at which all the What does a cooling curve represent in the context of temperature at temperature 2 temperature as components of C metal solidification? which all decreases as the metal melts the alloy become phases coexist the metal liquid solidifies The percentage The temperature The phases The critical In constructing a binary equilibrium diagram, what of each 2 at which reactions formed during temperature of B information does the composition axis provide? element in the occur cooling the alloy alloy The number of The equilibrium The critical The specific What does the Phase Rule help determine in a phase phases present 2 concentration of temperature of gravity of the B diagram? in a system at each phase the system phases equilibrium  The system The components The exhibits The components are completely components Which of the following is characteristic of an multiple solid are partially 2 soluble in each are only A isomorphous system? phases at soluble in each other in all soluble at high different other. proportions. temperatures. compositions. 2 What is the triple point of water in degree Celsius? 0.0022 0.0098 0.022 0.098 B 2 How is Gibb’s phase rule defined? F=C+P+1 F=C+P+2 F= C-P+2 F=C-P C Which of the following reactions occurs at the eutectoid Peritectic Eutectoid Peritectoid 2 Eutectic reaction C composition? reaction reaction reaction It helps in understanding the It represents It describes the various phases It shows the What is the significance of the Iron-Carbon equilibrium the cooling of behavior of 2 and phase crystallization A diagram? aluminum copper-based transformations of of pure iron. alloys. alloys. steel at different temperatures. At the eutectoid point in the Iron-Carbon equilibrium Austenite to Austenite to Ferrite to Cementite to 2 B diagram, the transformation occurs from: cementite pearlite austenite ferrite 2 What does the "T" in the T-T-T diagram stand for? Transformation Time Temperature Tensile stress C Which phase is found in the Iron-Carbon equilibrium 2 diagram at temperatures above the eutectoid Cementite Ferrite Pearlite Austenite D composition? FCC (cubic face BCC (cubic HCP (hexagonal None of the 2 Astenite has -------- crystal structure. A centered) body centered) close packaged) above 2 Melting point of iron in degree centigrade is equal to 768 1538 1410 910 B 2 Iron carbon phase diagram is ----- Unary phase Binary phase Tertiary phase Non of these B How many components are present in binary phase 2 3 4 2 1 C system? 2 Steels containing 0.8% C are called ________ Eutectoid Hypoeutectoid Hypereutectoid Mild eutectoid A A mixture of austenite and cementite is called 2 Ferrite Ledeburite Pearlite Bainite B ___________ The eutectic point in the iron-iron carbide phase 2 diagram occurs at __________ weight % composition of 0.022 0.77 2.11 4.3 D carbon. Cooling of austenite of eutectoid composition at 723oC 2 Ledeburite Sphereoidite Pearlite Bainite C results in formation of ________ Melting Temperature Equilibrium Purity of 2 Following cannot be obtained using a phase diagram temperatures of range for D solid solubility materials various phases solidification Which reaction does this equation denote? Liquid + 2 Eutectic Peritectic Eutectoid Peritectoid B Solid 1 → Solid 2 A 53% Ni Cu-Ni alloy is cooled from the liquid state to 2 28, 72 38, 62 35, 65 65, 35 B 1300°C. Calculate the % of liquid and solid at 1300°C. A 34.6% Pb-Sn alloy is cooled just below the eutectic 2 temperature (183°C). What is the fraction of proeutectic 70% and 30% 64% and 36% 36% and 64% 30% and 70% B α and eutectic mixture (α+β)? Time temperature transformation diagrams are drawn 2 Iron Manganese Any alloy Only steel D and used for ______________ Following phase will be resulted when the 2 transformation temperature of steel is in the range of Austenite Pearlite Bainite Martensite B 500 °C to 750 °C? Following phase will be resulted when the 2 transformation temperature of steel is in the range of Austenite Pearlite Bainite Martensite C 300 °C to 550 °C?  Following phase will be resulted when the 2 transformation temperature of steel is in the range of Austenite Pearlite Bainite Martensite D 100 °C to 300 °C? L (4.3% C) → L (0.53% C) + γ (0.8 % C) → α L (0.53% C) + γ(2.1 % C) + 2 Peritectic reaction at 1495°C in Fe C Diagram? δ(0.09% C) → (0.025% C) + δ(0.09% C) → γ A Fe3C (6.67% γ(0.17% C) Fe3C (6.67% C) (0.8 % C) C) L (4.3% C) → L (0.53% C) + γ (0.8 % C) → α L (0.53% C) + γ(2.1 % C) + 2 Eutectoid reaction at 727°C in Fe C Diagram? ? δ(0.09% C) → (0.025% C) + δ(0.09% C) → γ C Fe3C (6.67% γ(0.17% C) Fe3C (6.67% C) (0.8 % C) C) A eutectoid steel is slowly cooled from a temperature of 85.4% and 2 750°C to a temperature just below 727°C. Calculate the 88.3% and 11.7% 70% and 30 % 20% and 20% A 14.6% percentage of ferrite and cementite. 3 Malleable cast iron is more--------- than gray cast iron Stronger Hardness Ductile Brittleness C Nodular cast Malleable cast 3 White cast iron is also known as Chilled cast iron Pig cast iron A iron iron Carbon content in white cast iron generally varies from -- 3 2 to 3.6 % 1.5 to 2 % More than 4 % 0.04 A ----- Malleable 3 Cast iron is a.......... Ductile materials Brittle materials Tough materials C materials What is the primary factor differentiating low, medium, Alloying 3 Carbon content Hardness Ductility A and high carbon steels? elements What is the primary application of high-speed steel Machine tool Automobile Structural Household 3 A (HSS)? cutting body panels beams utensils Which steel component is commonly used in Medium 3 crankshafts due to its high strength and fatigue Low carbon steel Stainless steel Cast iron A carbon steel resistance? Which designation standard is used for steel 3 BIS ASME EN ASTM A specifications in India? 3 Composition of silicon in cast iron 1-2 % 2-3.5% 3.5-4.5% 4.5-5 % B  Carbon content in gray cast iron generally varies from ---- 3 1.2 to 2 % 2.5 to 3.8 % 4 to 6.67 % 0.03 B --- Plain carbon steels are alloys mainly consisting of Potassium and Carbon and Carbon and 3 Iron and Carbon A _________ Iron Potassium Indium Which of the following is NOT a type of plain carbon Medium High carbon 3 Low carbon steel Stainless steel D steel? carbon steel steel Improve Increase Decrease 3 The main purpose of adding alloying elements to steel? Reduce strength mechanical B corrosion hardness properties Type of stainless steel is most commonly used in kitchen 3 Martensitic Ferritic Austenitic Duplex C utensils? Primary element used for making stainless steel alloy 3 Chromium Zirconium Vanadium Indium A is___ Plain carbon steels are alloys mainly consisting of Potassium and Carbon and Carbon and 3 Iron and Carbon A _________ Iron Potassium Indium 3 Composition of carbon in medium carbon steels is___ 0.0005 0.1% – 0.3% 0.25% – 0.6% More than 0.6% C If the iron surface contains graphite, it is known as Spheroidal 3 Alloy cast iron White iron Grey iron C ________ graphite Malleable cast Spheroidal 3 Following cast irons cannot be machined White cast iron Grey cast iron A iron graphite cast iron Improves Increases Refines grain 3 What is the effect of Nickel on cast irons? Stabilizes carbides corrosion C hardness structure resistance Primary element used for making stainless steel alloy 3 Chromium Zirconium Vanadium Indium A is___ Stainless steels with little carbon and no nickel are Ferritic stainless Austenitic Martensitic Duplex stainless 3 A called ________ steel stainless steel stainless steel steel How is much amount of chromium (in percent) normally 3 1-2 % 2-5 % 5-10% 10-30 % D added in steel to be called as stainless steel?  The amount of carbon present in high carbon steel is 3 0.10% to 0.30% 2.2% to 4.5% 0.70% to 2.2% 12% to 13% C __________ Aircraft engine Oil burner parts, Pumps and valve 3 Following are applications of Ferritic stainless steels parts, heat Milk, kettles furnace C parts exchangers elements As the amount of carbon in steel increases, its range of heat ultimate 3 toughness hardness B ___________ decreases. treatment strength Following parts are mostly manufactured by using grey Surgical 3 Pistons Thin sheets Engine blocks D cast iron? equipment’s Following alloying element can be used to deoxidize 3 Phosphorous Carbon Cerium Selenium C steels ___________ steel is used when high hardness is Low-carbon Medium- 3 High-carbon steel Wrought iron A desired and ductility is not crucial. steel carbon steel Machine tools, Steel wires, Clutch discs, 3 Applications of high-carbon steel ______ Gears, valves leaf and coil D sheets, screws valve springs springs