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</body></html>";s:4:"text";s:33838:"A reactor plant which is designed to produce more fuel than it consumes. As the questions for the interview is not fixed, it solely depends on your luck that day. but little variation of creep properties with carbon content. What is the difference between total moisture and inherent moisture in coal ? Examples of latent heats are : heat of fusion, vaporisation, sublimation, and change in crystal form. What should be done to prevent a safety valve to stick to its seat ? 137. How is ceramic defined ? Rubber. Add New Question. This is the chance you have to divert the recruiters about the subjects you are best at ease with. This PDF civil engineering e-book also contains interview questions on buildings, questions on concrete, and other various civil engineering … Mention two types of dislocations. 20. Interview questions discussed here are from the engineering … 31. High drum level does not allow steam separation to be effective and some water can be carried over with steam which is not desirable for steam turbine. In what forms of cubic pattern, iron exists ? 79. Whether you are preparing to interview a candidate or applying for a job, review our list of top Engineer interview questions and answers. Get doubled. Though, if you try and find out, there are always a few set of questions which are always a part of the interview session. 70. I.C. These subjects may not be your favourites but you can still answer questions about them. Pressurised water reactor. Question3: What is a closed loop control system? Which factors influence the type of fracture in failure of a material ? Which rays are produced by cobalt-60 in industrial radiography ? 47. 80. Magneto hydrodynamic electricity generation. An elastomer is a polymer when its percentage elongation rate is ? The specific heat of a material is the ratio of the amount of heat transferred to raise unit mass of a material 1 degree in temperature to that required to raise unit mass of water 1 degree of temperature at some specified temperature. A plant which initiates, sustains, controls and maintains nuclear fission chain reaction and provides shielding against radioactive radiation is nuclear reactor. Why rockets using liquid hydrogen have higher specific impulse compared to liquid hydrocarbon ? Manganese increases tensile strength and hardness. What are the major effects of alloying elements? For conduction of heat, the instantaneous rate of heat flow is product of three factors. Self sustained, continuing, sequence of fission reactions in a controlled manner is fission chain reaction. This phase has a tetragonal crystal structure and contains carbon in supersaturated solid solution. Creep is low and progressive deformation of a material with time under a constant stress at high temperature applications. 124. 145. 50. Moisture, volatile matter, fixed carbon and ash. Polished surface promotes drop wise condensation and does not wet the surface. 1. What is the difference between alpha iron, delta iron and gamma iron ? In isentropic process, heat transfer takes place and in throttling process, enthalpy before and after the process is same. For which parts the Wahl factor and Lewis form factor used ? 194. 68. Which reactor produces more fissionable material than it consumes ? Interview Questions & Answers For Planning Engineers www.planningengineer.net Page 1 of 25 Acknowledgment: First of all, we as "Planning Engineer" Team would like to thank all of our members who interacted and participated with us through this topic. Perfection of material conditions is possible at lower sizes and as size increases, it is not possible to attain uniform structure of the material. 25 best mechanical engineering interview questions and answers pdf free download 1. 54. Atmospheric fluidised bed combustion and pressurised fluidised bed combustion. but write some engine related question. 67. 37. Biological shield of heavy concrete prevents exposure to neutrons, beta rays and gamma rays which kill living things. 134. Emissive power. 122. Hydrogen cannot be removed easily from molten steel. 106. What is isotropic material ? Learn about interview questions and interview process for 110 companies. Convective heat transfer is effected between a solid and fluid by a combination of molecular conduction within the fluid in combination with energy transport resulting from the motion of fluid particles. Under what conditions it approaches isobaric, isothermal, and isometric process ? When a homogeneous mixture of two (or more) atomic forms exists in solid state, it is known as solid solution. Austenite stabilisers have the effect of extending the temperature range overwhich austenite is formed. ? Fertile material itself is not fissionable, but it can be converted to a fissionable material by irradiation of neutrons in a nuclear reactor. (e) Defects in tube manufacture, although far from being a regular occurrence, can be a cause of serious trouble. The resultant overheating leads to a failure by creep, characterised by the bulging of the tube with the eventual development of a longitudinal split. 34. A peritectic transformation involves a reaction between a solid and liquid that form a different and new solid phase. Killed steels are deoxidised in the ladle with silicon and aluminium. engines can be expressed as RAC rating, SAE rating, or DIN rating. Pressurised fluidised bed combustion (PFBC) system operates the bed at elevated pressure. Endurance limit is the maximum level of fluctuating stress which can be tolerated indefinitely. Proximity analysis of coal provides data for a first, general assessment of a coal’s quality and type. Give one example each of the following proportion of materials dimensional, physical, technological and mechanical. kumaresan.k 10-16-2016 05:38 AM mechanical engineering questions and answers for interview these question are very important nice questions Chandra prakash 09-20-2016 12:56 PM Suggetion What is the effect of inter cooling in gas turbines ? Which is that ? Non uniform corrosion over the entire metal surface, but occuring only in small pits is called pitting. Silicon in excess of 2.5% causes brittleness, and amounts higher than 5% make the steel non-malleable. 111. Gamma rays. Following the typical opening interview questions, candidates can expect to be met with questions that delve deeper into their history and interest in mechanical engineering. At points of inflexion in a loaded beam the bending moment is zero and at points of contraflexure in loaded beam the bending moment changes sign from increasing to decreasing. This is called enrichment and is accomplished in an enrichment plant. Distinguish between creep and fatigue. Which element causes difference in higher and lower heating values of fuel ? What do you understand by eutectic ? What is the difference between basic hole and basic shaft ? What are the principal constituents of brass? If a material exhibits same mechanical properties regardless of loading direction, it is isotropic, e.g., homogeneous cast … I can give you some ideas about the practical part of this interview, and list questions you may get, but the truth is that in every good company you will deal with several short case studies.. You will have to demonstrate your way of thinking and practical skills when it comes to engineering … What is polytropic process ? Mechanical Engineering Interview questions and answers 1. Temperature. Why ? What is the percentage of carbon in cast iron ? Why supercritical boilers use less amount of steel compared to non-supercritical boilers ? 140. Which elements increase the corrosion resistance of steel ? Explain the rule to find specific heat of aqueous solutions. In which reversible process no work is done ? Download PDF. Lamination in boiler tubes or score marks arising from the cold drawing of tubes, give rise to premature failure and may promote corrosion at these regions. Thus, for a 15% by weight solution of sodium chloride in water, the specific heat would be approximately 0.85. Manner of loading, and the rate of loading promote transition from ductile to brittle fracture. It is a material having same elastic constants in all directions. Slope is variable. It satisfies equation of state and its specific heats are constant. How much is the work done in isochoric process ? An increase in carbon content lessens the thermal and electrical conductivities of steel and increases its hardness on quenching. Here are 70 questions with answers for you to practice before you meet the interviewer for the position of HVAC engineer. Whiskers are very small crystals which are virtually free from imperfections and dislocations. 82. Which is the common element between brass and bronze ? 41. What type of boiler does not need a steam drum ? Pearlite is eutectoid mixture of ferrite and cementile. 8. 75. 10. Which impurities form hard scale and which impurities soft scale ? kumaresan.k 10-16-2016 05:38 AM mechanical engineering questions and answers for interview these question are very important nice questions Chandra prakash 09-20-2016 12:56 PM Suggetion It is caused by lack of uniformity in metal. )In many cases you will be the only person they interview for the job, or you will compete wit… Scavenging is process of flushing out burnt gases from engine cylinder by introducing fresh air in the cylinder before exhaust stroke ends. 29. What was the first thing you ever designed? How heat treatment alters properties of steel ? Why is it that the maximum value which the residual stress can reach is the elastic limit of the material ? The moisture content of the bulk as sampled is referred to as total moisture, and that of the air dried sample is called inherent moisture. Which nuclear reactor uses water as a coolant, moderator and reflector ? Whether individual components in composite materials retain their characteristics or not? 130. It has rapid self breeding of fissile fuel during the operation of the reactor, and thus, it offers about sixty times the output with same natural uranium resources through ordinary non-breeder nuclear reactor. What is fuel ratio ? Further it is very convenient to insert and take out the cover plate from elliptical opening. Quantities like pressure, temperature, density, viscosity, etc. What properties need to be considered for applications calling for following requirements : What is heavy water and what is its use in nuclear plants ? In some engines glycerine is used in place of water for cooling of engine. Tag: qa qc mechanical engineer interview questions and answers pdf. 132. 46. What is view factor ? 76. Gross heating value because steam is condensed and heat of vapour formed is recovered. 109. 89. 133. Throttling process. Peritectic. 88. Brass is an alloy of copper with zinc; and bronze is alloy of copper with tin. 170. Such elements are carbon, manganese, nickel, copper and cobalt. Which furnace burns low-ash fusion coal and retains most of the coal ash in the slag? ENGINEERING Interview Questions for Freshers : We provide engineering interview questions with answers pdf free download for Freshers Experienced & Mcqs objective type lab viva basic general questions book. <�^)>>>><�^)>>>>] 180. 139. However manganese increases the crack sensitivity of weldments, particularly with steels of higher carbon content. 94. The material like U 38 which can be converted to a fissile material by the neutron flux is called “fertile material”. What are thermal neutrons ? What are the causes of failure of boiler tubes ? What is the difference between hard water and soft water ? Mechanical Mechanical Interview Questions and Answers – Part 3. 163. Superheater tubes are subjected to the most severe combination of stress, temperature and corrosive environment. Your new employer is going to … 166. Column is always vertical but strut as member of structure could carry axial compressive load in any direction. Such elements are silicon, chromium, molybdenum, tungsten, titanium and niobium. 162. Enrichment is the process by which the proportion of fissile uranium isotope (U-35) is increased above 0.7% (original % in natural uranium). 171. A conjugate beam is an imaginary beam of same size as original beam and carrying a distributed load in accordance with the bending moment diagram. Why it is unsafe to have high water condition in boiler drum ? State the difference between ultimate and proximate analysis of coal ? Modulus of resilience is the maximum strain energy stored in a material per unit volume and modulus of rigidity is the ratio of shearing stress to the shearing strain within the elastic limit. What is the difference between isotropic material and homogeneous material ? Accordingly three methods of disposal are : engines is much higher compared to gas turbine. How is thermal n affected by weak and rich mixture strength ? 169. 126. 123. length of path. Large forgings in alloy steel are particularly sensitive to this phenomenon. (iv) wear resistance It decreases weldability. Your email address will not be published. Mechanical Engineering questions and answers with explanation for interview, competitive examination and entrance test. Enthalpy. 5. ���.�8���%��=�� Water containing heavy isotopes of hydrogen (Deuterium) is known as heavy water. CCP (cubic dosed packed) structure-Copper. It is least when compression process approaches isothermal. 87. Which reactor requires no moderator ? 176. Irons with fairly equal proportions of graphite and iron carbide have intermediate hardness and are called “mottled” irons. At temperatures just belot the A1, the transformation from austenite.to pearlite may take an appreciable time to initiate and complete, but the product will be lameller pearlite. are independent of mass. Which parameter remains constant in a throttling process ? Increase in area for increase in velocity for supersonic flow is required because the density decreases faster than velocity increases at supersonic speeds and to maintain continuity of mass, area must increase. 117. Stalling is a local phenomenon and it occurs when How breaks away from the blades. Explain the terms solid solution, eutectic, eutectoid and peritectic. The structural components of an alloy are its individual portions, each having a single structure with its characteristic features. (d) Sudden failure of the boiler tube due to corrosion arises from embrittlement of the carbon steel due to interaction between atomic hydrogen from the corrosion process and the iron carbide present in the steel. 172. Alloys possess typical properties inherent in the metallic state. By excessive treatment the high compressive stresses are introduced but these are balanced by high internal tensile stresses of equal value and the subsurface fatigue cracks may develop in the regions of high tensile stress and lead to early fatigue failure. The process of converting the non fissile U 38 to fissile U-35 is also called “Conversion”. 59. Fibres are liable to maintain this and thus have high specific strength. Solved examples with detailed answer description, disscussion in forum helps in easy to understand … Why iso-octane is chosen as reference fuel for S.I. Which element is added in steel to increase resistance to corrosion ? Fuel flexibility, electrical load following capability, reliability, availability, and maintenance ease. /Contents 4 0 R>> 187. 40. What do you understand by timed cylinder lubrication ? 189. If percentage elongation of a material is more than 200%, it is classed as ? Water tube boilers raise steam fast because of large heat transfer area and positive water circulation. If you have a degree or diploma in mechanical engineering. For effective lubrication, lub oil needs to be injected between two piston rings when piston is at bottom of stroke so that piston rides in oi during upward movement. engines is more than that of gas turbine plant ? Alloys are therefore more than metals alone. 184. Thus they respond faster to fluctuations in demand. %PDF-1.3 How with alloying of steel it is possible to a achieve properties which can not be achieved with heat treatment ? What are whiskers ? A combination of phases in a state of equilibrium is called a system. Why ? As an alloying element, manganese serves as an inexpensive means of preventing “hot shortness”. Heating value is due to C, H and S. The gas flows thorugh bed without disturbing particles significantly but gas velocity is high enough to support the total weight of bed (fluidisation). What is Curie point ? <> (i) rigidity Thus weight of coolant gets reduced and smaller riadiator can be used. What is the critical temperature of a refrigerant ? 192. Exhaust gases have sufficient energy to power a gas turbine, of course, gases need to be cleaned. Copyright 2020 , Engineering Interview Questions.com, MECHANICAL ENGINEERING Multiple Choice Questions”, 600 TOP MECHANICAL ENGINEERING Interview Questions and Answers PDF. 103. Irons with carbon present as iron carbide are extremely hard, difficult to machine and are called “white” irons. Explain the difference between pearlite and cementile ? This document was originally initiated by Planning Engineer website by 173. 186. Fatigue is the reduced tendency of material to offer resistance to applied stress under repeated or fluctuating loading condition. Mechanical Engineering Interview Questions with answers. 188. Metallic bond is strongest and molecular bond also known as Vander Waals bond is weakest. 198. Carbon, hydrogen, nitrogen, and sulphur in coal on a weight percentage basis. (i) RigidityâElastic modulus and yield strength Low water in boiler drum is unsafe because it may result in overheating of water tubes in furnace. For reversible isothermal steady-flow processes or for reversible constant-pressure isothermal nonflow processes, change in free energy is equal to net work. In ultimate analysis, chemical determination of following elements is made by weight: Fixed and combined carbon, H, O, N, S, water and ash. engines have much lower auxiliary consumption. Similarly a material may evidence ductile failure under tensile loading at ordinary testing speed but if load is applied at a high velocity then failure may be brittle. Heating value is due to fixed carbon and volatile matter. Horse power of I.C. Explain the difference between the points of inflexion and contraflexure. Solid Solution. 38. The throttling process is then carried out in stages. endobj MECHANICAL ENGINEERING Interview Questions and Answers PDF free download, 300 MECHANICAL ENGINEERING Interview Questions and Answers, 400 MECHANICAL ENGINEERING Interview Questions and Answers, 500 MECHANICAL ENGINEERING Interview Questions and Answers, 600 MECHANICAL ENGINEERING Interview Questions and Answers. A basic hole is one whose lower deviation is zero and in case of basic shaft the upper deviation is zero. 159. Roughness, enthalpy, toughness, and hardness respectively. At the critical pressure ratio. I Want Product Design Engineer Questions and Answers, Plz send me the power plant engineering interview questions with answers �C�PmxB^�����KE�0����*\��f��"���pWa`���,\Es>n�2+|��IvU]�Bciky6e�n���Jf(. Safety valve should be blown off periodically so that no corrosion can take place on valve and valve seat. 175. 4 0 obj When maximum discharge is obtained in nozzle ? (c) combustible or ash and moisture free basis. Cementite is chemical compound of iron and carbon. 120. Glycerine has boiling point of 90°C which increases its heat carrying capacity. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. They are stored in water for several months to permit radioactive decay to an accepetable low level. Fast breeder reactor. wood; composites. What is the difference between nuclear fission and fission chain reaction. Ferrite is the solid solution of carbon and other constituents in alpha-iron. AFBC (Atmospheric fluidised bed combustion) process consists of forming a bed of inert materials like finely sized ash or ash mixed with sand, limestone (for sulphur removal), and solid fuel particles in a combustor and fluidising it by forcing combustion air up through the bed mixture. Materials lacking this property are anisotropic. engine ? 28. What causes hardness in steel ? What is the structure of pure iron and whether it is soft or hard ? BCC (body centred cubic) structureâMolybdenum, FCC (face centred cubic) structureâAluminium, HCP (hexagonal closed packed) structureâZinc. Aluminium is also added to brass to improve corrosion resistance. Ratio of their thickness = (Prandtl number)-1/3. Maintenance Engineer related Frequently Asked Questions by expert members with job experience as Maintenance Engineer. 74. Which pipes are used for steam lines? Sir,plz send me all memechanical related question.I amm very interested to leearn. 72. The best way to reduce the stress is to be prepared for your job interview. It allows cooling water to go to radiator beyond a predetermined temperature. 100. Why axial flow compressor is preferred for gas turbines for aeroplanes ? What do you think are the most important skills for a mechanical engineer to possess? … A volatile liquid will boil under the proper conditions and in so doing will absorb heat from surrounding objects. 23. Breeder reactor. Out of electric heater and heat pump, which is economical in operation ? CANDU. What are killed steels and what for these are used ? In what instances have you demonstrated leadership skills, and how would you … (b) dry or moisture free basis It is soft, ductile and relatively weak. List at least two factors that promote transition from ductile to brittle fracture. endobj Using a flash chamber at some intermediate pressure, the flash vapour at this pressure can be bled off and fed back to the compression process. Because a large portion of turbine work is eaten away by compressor and its inefficiency will affect net power output and cost of generation. (iii) strength to withstand overload without fracture. It may be reported as In which process fluid expands but does no work ? (a) High thermal ratings may lead to rapid failure if the internal fluid flow is reduced for any reason. How would y… Elliptical shape has minimum area of opening and thus plate is weakened the least. A state in which a liquid alloy (or metal) coexists with its crystals is a two-phase system. What is stellite ? 200. It is a special class of anisotropic materials which can be described by giving their properties in three perpendicular directions e.g. It is an automatic machine in which workpiece alongwith fixture is transferred from one station to other automatically and several operation on workpiece are performed at each station. Relatively good erosion and corrosion resistance. 138. 64. How the analyses and calorific values of fuels can be reported ? .Normal carburising/nitriding treatments increase volume due to phase transformation at Surface and introduce residual compressive surface stress and thus increase the fatigue strength. (c) High radioactive material. 96. 156. What do you understand by critical points in iron, iron-carbide diagram ? What is the function of thermostat in cooling system of an engine ? Nonusable fission products are radioactive and take short/medium/long time for radioactive decay to reach safe level of radioactivity. Heavy water has low cross section for absorption of neutrons than ordinary water. A continuous beam is one which is resting on more than two supports. 43. As compression ratio increases, thermal n increases. Whether you are preparing to interview a candidate or applying for a job, review our list of top Mechanical Engineer interview questions and answers. This civil engineering interview questions and answers pdf eBook you can find all the important civil engineering interview questions asked in big construction companies like L&T, Tata Projects, and many reputed civil engineering companies.. Why consumption of lubricating oil is more in two-stroke cycle petrol engine than four-stroke cycle petrol engine ? Super-critical pressure boiler. The breeding is obtained by converting fertile material to fissile material. 119. What are these ? If the temperature is lowered sufficiently, the diffusion controlled nucleation and growth modes of transformation are suppressed completely and the austenite transforms by a diffusionless process in which the crystal lattice effectively shears to a new crystallographic configuration known as “martensite”. State and explain in detail polygon law of forces 154. Mechanical engineering is the subject that applies engineering, physics, and material science principles to design, analyse, manufacture and maintain mechanical systems. Moisture, volatile matter, ash and fixed carbon. How the thickness of thermal boundary layer and thickness of hydrodynamic boundary layer related ? While normal carburising and nitriding surface treatments increase fatigue strength, excessive treatment may decrease the fatigue strength. temperature gradient, i.e. Silicon increases the electrical resistivity of steel and decreases hysteresis losses. PERT is based on the approach of multiple time estimates for each activity. Mechanical properties for mechanical engineering and design. 72. If austenite containing about 0.80 percent carbon is slowly cooled through the critical temperature, ferrite and cementite are rejected simultaneously, forming alternate plates or lamellae. 48. And looking for a job in the mechanical field. Some elements exist in more than one crystalline form. 49. Luckily for you, right now we experience a deficit of mechanical engineers, and companies literally fight for skilled job candidates. https://engineeringinterviewquestions.com/piping-engineering-interview-questions-answers-pdf/, plz send Questions to Answers In addition to high-temperature strength, resistance to corrosion is also important. Iron exists in two forms of cubic pattern, namely body centered cubic (bcc) and face-centered cubic (fee). These questions and answers will help you strengthen your technical skills, prepare for the new job interview … The process of splitting of nucleus into two almost equal fragments accompanied by release of heat is nuclear fission. 147. 183. What is their significance and importance ? What for pyranometer is used ? To modify the type of oxide film formed on the surface of the steel and thereby affect its corrosion resistance. Machining Operations and Machine Tools Explain difference between modulus of resilience and modulus of rigidity ? Gas cooled reacator. By addition of zinc in copper, both tensile strength and elongation increases. At slightly higher velocity excess gas passes through the bed as bubbles (fluidised bed) and gives the bed the appearance of a boiling liquid. What is the different between brass and bronze ? Which reactor uses primary coolant as fluoride salts of lithium, beryllium, thorium and uranium ? The maximum power is consumed at about 70% of maximum flow in case’of fan with backward blades. What is critical temperature in metals ? Write any one situation where it is advantageous, state and explain in detail polygon law of forces, please send me all mechanical interview questions in pdf form so I can download and print it…send to my mail ID : pravinpotdar98@gmail.com, Your email address will not be published. Mechanical Properties The mechanical properties of a material describe . 60. Hydrogen. (a) as received or fired (wet) basis What is the difference between conversion and enrichment ? What is the name of solid solution of carbon in alpha iron and delta iron ? 5 0 obj 152. Mechanical Engineering Interview Questions and Answers Book pdf. Engine to burn lean mixture uses high compression ratio and the highly turbulent movement of the charge is produced by the geometry of the combustion chamber. (where u = internal energy, h = enthalpy, T = temperature, s = entropy) A phase is a homogeneous portion of a system having the same composition and the same state of aggregation throughout its volume, and separated from the other portions of the system by interfaces. In this article, we will discuss commonly asked interview questions and answers on mechanical Design. Required fields are marked *. Bubbling fluidised bed combustion (BFBC) has a defined height of bed material and operates at or near atmospheric pressure in the furnace. High damping capacity, with respect to vibration. What is the difference between heat capacity and specific heat of a material ? Isothermal process. What does angular momentum mean? Carbon also increases air-hardening tendencies and weld hardness, especially in the presence of chromium. Purging ensures that any unburnt fuel in furnace is removed, otherwise it may lead to explosion. Pressurised water reactor. Explain the difference between AFBC, BFBC, PFBC and PCFB in regard to fluidised bed technologies. 14. Advanced pulverised and pressurised pulverised fuel combustion. 143. On ultimate analysis. The lower temperature form is known as “alpha”-iron and the higher temperature form as “delta”-iron. As size increases, the condition of ordered and repeating arrangements can’t be guaranteed because of several types of defects and dislocations and thus the specific strength gets lower. Intensive properties. (iv) Wear resistanceâHardness 86. About Interview Questions Answers Interview Questions Answers . 71. What is the effect of addition of zinc in copper? Why manholes in vessels are usually elliptical in shape ? What is temper embrittlement in alloy steels and what are its effects ? Rusty surface in general are of low strength and hardness but lowers ductility and toughness of steel two-phase system,. Plot for is used in heat mechanical engineer interview questions and answers pdf, if heat flux intensity is doubled then temperature difference ultimate! Alloy ( or Helmholtz function ) is known as Vander Waals bond weakest... Will boil under the proper conditions and in throttling process, heat,! To ask about favourite subjects in college a gas turbine is consumed at 70! 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Makes it extremely brittle and filled with minute cracks cubic pattern, namely body centered cubic ( bcc ) face-centered. ) -1/3 tubes and plates in boiler mechanical engineer interview questions and answers pdf is unsafe to have high condition! Impurities and soft water contains very little or no scale forming substances matter, fixed carbon production sound... And increases its hardness on quenching related question.I amm very interested to leearn from during...";s:7:"keyword";s:46:"how to clean porcelain grill grates char broil";s:5:"links";s:1104:"<a href="https://api.duassis.com/storage/wf6hbvi/article.php?a6eb8f=autokinetic-illusion-example">Autokinetic Illusion Example</a>,
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