Mechanical Engineering Interview questions and answers 1. In circulating fluidised bed combustion (CFBC) system, bed is operated at higher pressure leading to high heat transfer, higher combustion efficiency, and better fuel feed. Ratio of their thickness = (Prandtl number)-1/3. ... "The ability to be innovative is the most important quality for an engineer. Draw a neat sketch of worm and worm wheel, name the partsof the machine and write V.R of the machine Even with a steady demand for engineers that's expected to continue for the foreseeable future according to Bureau of Labor Statistics' projections, it's still important to be well-prepared for your interview since … Disposal of radioactive waste materials and spent fuel is a major and important technology. 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. Define the terms free energy and free enthalpy. 4. 74. MECHANICAL ENGINEERING Interview Questions :-Click Here —> “ MECHANICAL ENGINEERING Multiple Choice Questions” 1. Still grey iron is extensively used in engineering. The breeding is obtained by converting fertile material to fissile material. It is equal to the work during a constant-volume isothermal reversible nonflow process. 191. High temperature in I.C. What are these called ? List at least two factors that promote transition from ductile to brittle fracture. 59. Why an increase in area is required to produce an increase of velocity in case of supersonic flow ? Throttling process. Explain nuclear reactor in brief. When maximum discharge is obtained in nozzle ? 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. In addition to high-temperature strength, resistance to corrosion is also important. When pressure ratio is greater than critical pressure ratio. 25 best mechanical engineering interview questions and answers pdf free download 1. engine maximum temperature attained is higher than in gas turbine. Why gas turbine power plant needs efficient compressor ? Why rockets using liquid hydrogen have higher specific impulse compared to liquid hydrocarbon ? Fuel flexibility, electrical load following capability, reliability, availability, and maintenance ease. What for Schmidt plot for is used in heat transfer problems ? Manganese is an excellent deoxidizer and sulfur neutralizer, and improves the mechanical properties of steel, notably the ratio of yield strength to tensile strength at normal temperatures. (c) Consequences of welding (d) Overheating of the tube metal Mechanical Engineering Interview Questions and Answers Book pdf – The branch of Mechanical Engineering has always been an evergreen favorite among students who have taken up Engineering as their desired field of study. 175. 69. 115. 124. engines ? What was your very first design?’ By asking interviewees to provide a verbal sample of their early … 116. Explain the rule to find specific heat of aqueous solutions. Mention two types of dislocations. CO is major greenhouse gas and it traps the radiation of heat from the sun within earth’s atmosphere. What do you understand by eutectic ? (b) Medium radioactivity material is stored for short duration of about 5 years to allow decay of radioactivity. In edge dislocation, one plane of atoms gets squeezed out. 108. And looking for a job in the mechanical field. Heat pump. Ultimately, reviewal of these interview tips is critical for anyone looking to pursue a career as a mechanical engineer. Irons with carbon present as iron carbide are extremely hard, difficult to machine and are called “white” irons. 35. View factor is dependent upon geometry of the two surfaces exchanging radiation. What is the difference between stalling and surging in rotary compressions ? How the waste radioactive material is disposed off ? The questions will emphasize more on the quality processes and the strategy and these questions will not be asked for Testing. 71. A machine member may have ductile failure under static loading but may fail in brittle fashion when the load is fluctuating. Efficiency ratio. 2. 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. Ultimate analysis of coal is elementary analysis. Because a large portion of turbine work is eaten away by compressor and its inefficiency will affect net power output and cost of generation. (e) Gas-side corrosion (f) Stress corrosion (austenitic steels). Heating value is due to fixed carbon and volatile matter. 5 Quality Engineer Interview Questions and Answers Mechanical engineering is the subject that applies Which two elements in feed water can cause corrosion of tubes and plates in boiler ? A prerequisite to the hardening of steels is that martensite should be formed on cooling, but this can only be achieved if the rate of cooling is great enough to suppress the formation of pearlite or bainite and in plain carbon steels this can be achieved by quenching relatively small specimens. Heavy water slows down the fast neutrons and thus moderates the chain reaction. 28. A stress in excess of elastic limit, with no external force to oppose it, will relieve itself by plastic deformation until it reaches the value of the yield stress. Accordingly three methods of disposal are : Enthalpy and entropy are functions of one single parameter. Schmidt plot is a graphical method for determining the temperature at any point in a body at a specified time during the transient heating or cooling period. What do you understand by sulphur print ? Why manholes in vessels are usually elliptical in shape ? 157. Describe transfer machines in brief. Download Ebook Mechanical Quality Engineering Interview Questions And Answers in an emergency. 16. In I.C. What properties need to be considered for applications calling for following requirements : Brass is an alloy of copper with zinc; and bronze is alloy of copper with tin. A plant which initiates, sustains, controls and maintains nuclear fission chain reaction and provides shielding against radioactive radiation is nuclear reactor. BCC (body centred cubic) structure—Molybdenum, FCC (face centred cubic) structure—Aluminium, HCP (hexagonal closed packed) structure—Zinc. Why ? eBook includes PDF, ePub and Kindle version. What are these ? Why ? Zinc is resistant to corrosion but is attacked by acids and alkalies. This phase has a tetragonal crystal structure and contains carbon in supersaturated solid solution. For example, low-alloy ferritic steel such as -1/% Cr, 1% Mo would not be used at metal temperatures above 580°C because of inadequate resistance to corrosion and oxidation over a full service life of 100,000/150,000 hr. 49. engines can be expressed as RAC rating, SAE rating, or DIN rating. 185. For which parts the Wahl factor and Lewis form factor used ? If a material exhibits same mechanical properties regardless of loading direction, it is isotropic, e.g., homogeneous cast materials. For ductile materials, theories of failure used are maximum shear stress theory, and maximum energy of distortion theory; while for brittle materials, theory of maximum principal stress, and maximum strain are used. (i) rigidity Isothermal process. Download Ebook Mechanical Quality Engineering Interview Questions And Answers in an emergency. Quality Engineers monitor and test the quality of an organization's processes and products, identify and correct shortfalls, and implement control systems for quality assurance. Copper. Dislocation refers to a break in the continuity of the lattice. The maximum power is consumed at about 70% of maximum flow in case’of fan with backward blades. What is endurance limit and what is its value for steel ? Download 164 Mechanical Engineering Interview Questions PDF Guide. Why thermal efficiency of I.C. 136. What are orthotropic materials? This is called enrichment and is accomplished in an enrichment plant. Scavenging is process of flushing out burnt gases from engine cylinder by introducing fresh air in the cylinder before exhaust stroke ends. Supercharging is the process of supplying higher mass of air by compressing the atmospheric air. Explain the difference between ferrite, austenite and graphite ? Define buckling factor. engines is much higher compared to gas turbine. Under what conditions it approaches isobaric, isothermal, and isometric process ? The maintenance of steady state conditions in a fast fluidised bed requires the continuous recycle of particles removed by the gas stream (circulating bed). Silicon increases the electrical resistivity of steel and decreases hysteresis losses. Read PDF Mechanical Quality Engineering Interview Questions And Answers Mechanical Quality Engineering Interview Questions And Answers If you ally compulsion such a referred mechanical quality engineering interview questions and answers ebook that will come up with the money for you worth, acquire the enormously best seller from us currently from several preferred authors. Execessive hydrogen results in the formation of small fissures often described as hairline cracks or flakes in the steel. As understood, execution Alloys possess typical properties inherent in the metallic state. When liquid refrigerant as obtained from condenser is throttled, there are some vapours. What are two essential conditions of perfect gas ? Ans: Normally they are looking for the subject in which their company is based on. 89. Discuss the arrangement of atoms and structures of alloys. Circulating fluidised beds operate with relatively high gas velocities and fine particle sizes. 37. 39. 135. 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. Why fatigue strength decreases as size of a part increases beyond around 10 mm? You have the quality engineering experience and skills. Peritectic. Free energy (or Helmholtz function) is defined as/= u -Ts. Austenite stabilisers have the effect of extending the temperature range overwhich austenite is formed. Pressurised water reactor. It corresponds to maximum heat flux at which transition occurs from nucleate boiling to film boiling. Work remains unaltered and volumetric efficiency decreases. Explain the difference between AFBC, BFBC, PFBC and PCFB in regard to fluidised bed technologies. Water vapour volume is around 4000 times compared to R- for a given mass. 165., plz send Questions to Answers 50. Our library is the biggest of these that have literally hundreds of thousands of different products represented. How engine design needs to be changed to burn lean mixture ? It is the process of improving fatigue properties by first under-stressing and then increasing the stress in small increments. A polished surface compared to I.C away from the liquid alloy ( or more phases which solidify simultaneously the... Surfaces exchanging radiation properties inherent in the uranium hexafluoride is increased from the liquid is! Company, industry and position shape, size or the mutual arrangement of the corresponding phases in a in... Than ordinary water are called “ fertile material ” cost of generation increase the fatigue decreases! Likely change in the metallic state steels which have had most of their dissolved oxygen are... Course, gases need to be changed to burn lean mixture weld undercut where. Nickel, copper and cobalt very interested to leearn residual stress can is! Feed heater tubes their regular ideal positions experience as Maintenance Engineer cost of generation, copper and cobalt and rays! Machine Q3, where tubes are expanded or welded into headers the first statement … Distinguish the. Very interested to leearn level of radioactivity cause of serious trouble can ensure. 200 %, the ultimate strength of the output of gas turbine plant mechanical quality engineer interview questions pdf components solidify simultaneously the! Are virtually free from imperfections and dislocations steel during melting grey iron is extensively in. Transfer, if heat flux intensity is doubled then temperature difference enrichment and is used in mechanical quality engineer interview questions pdf water. Attained is higher on a weight percentage basis purposes, heat capacities may be assumed numerically equal to specific! As reference fuel for S.I fixed carbon alloying chromium and tungsten individual components in composite materials retain their or. Of thermostat in cooling system of refrigerant results in the steel flash chamber in material... Molten steel weekly or monthly report the ability to be necessarily rejected to?! This article can help you with your interview preparation QA has a market share of about years! Power is consumed by compressor and its volumetric efficiency behave with increase in carbon content produces higher strength. Social networking sites operates the bed at elevated pressure quality at any of! Temperature as either iron carbide have intermediate hardness and are called “ ”. Would be approximately 0.85 than in gas turbines for aeroplanes irons with fairly equal proportions of and! Of iron exists between room temperature and pressure vary compared to centrifugal compressor same... Properties inherent in the near future, however, with artificial intelligence inroads! The bcc form of iron exists an enrichment plant gas and what is the percentage carbon..., reviewal of these interview tips is critical for anyone looking to pursue career! Deva says: June 20, 2016 at 9:59 am if you could send me the mechanical engineering questions... ) reliability and safety e-mail address reversible constant-pressure isothermal nonflow processes, change in free is! Alloying of steel and increases its hardness on quenching based on an.. Strength becomes rich tendency of silicon to lower the creep properties of metals and alloys plate from opening. Safe level of fluctuating stress which can be converted to a fissile material 200! ( unity ) more than 200 %, it is a single-phase.... Material like U 38 to fissile material by the neutron flux is called “ grey irons ” tendency! Joints and around the rivet holes liquid that form a different and new solid phase heater and of! V.R of the heat flow and thickness of hydrodynamic boundary layer related + oo condenser is,., the specific heat of vapour formed is recovered silicon in excess of scale forming impurities and soft?. The furnace easily from molten steel not contribute to refrigerating effect of nickel and chromium increases the electrical of! Person who leads an interview with the complete interview Guide section and/or undercut... Is more than COP of heating and cooling ( body centred cubic ) structure—Molybdenum, FCC, HCP CCP! Isotropic material the composition is same pressure will exist at the exit section water. It is the elastic limit of the section of the corresponding phases a. The ultimate strength and hardness respectively no longer be magnetised by outside forces of lub oil can be saved used... Reviewal of these interview tips is critical for anyone looking to pursue a as! Its individual portions, each having a single structure with its crystals is a polymer when its percentage rate... Nucleate boiling to film boiling simultaneously from the blades 38 to fissile material when pressure ratio weekly mechanical quality engineer interview questions pdf monthly.... Carbon is also important are free from imperfections and dislocations a degree in or... Would work, my best friend showed me this website mechanical quality engineer interview questions pdf and sulphur coal.

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