What causes hardness in steel ? It is a solid formed by combination of metallic and non-metallic elements. 137. Glycerine has boiling point of 90°C which increases its heat carrying capacity. It improves rolling properties, hardenability, and resistance to wear. Horse power of I.C. ‘. Low water in boiler drum is unsafe because it may result in overheating of water tubes in furnace. 175. 128. (a) Zero or low radioactivity material is dispersed or stored without elaborate shielding. Free energy (or Helmholtz function) is defined as/= u -Ts. It corresponds to maximum heat flux at which transition occurs from nucleate boiling to film boiling. Why entropy change for a reversible adiabatic process is zero ? Your new employer is going to … This is called enrichment and is accomplished in an enrichment plant. (a) Prior fabrication history (b) Faulty heat treatment 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. Mechanical Mechanical Interview Questions and Answers – Part 3. Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. I.C. 73. 93. Proximity analysis of coal provides data for a first, general assessment of a coal’s quality and type. For supersonic isentropic flow at the inlet section a higher velocity and lower pressure will exist at the exit but if a shock wave occurs in the diffuser then a higher pressure will exist at the exit. 69. 5. A reactor plant which is designed to produce more fuel than it consumes. The chemical elements that make up an alloy are called its components. Why ? The maintenance of steady state conditions in a fast fluidised bed requires the continuous recycle of particles removed by the gas stream (circulating bed). 165. What do you understand by catenary cable ? What was the first thing you ever designed? Mechanical Engineering this answer is very nice. How the analyses and calorific values of fuels can be reported ? 5 0 obj 19. Solved examples with detailed answer description, disscussion in forum helps in easy to understand … 112. For springs and gears respectively. A continuous beam is one which is resting on more than two supports. 86. Though, if you try and find out, there are always a few set of questions which are always a part of the interview session. Thermal neutrons are slow neutrons (having energy below 1 eV) which are in thermal equilibrium with their surroundings. 65. The phase and structures of alloys describe the constitution, transformations and properties of metals and alloys. 185. How engine design needs to be changed to burn lean mixture ? Why iso-octane is chosen as reference fuel for S.I. (a) as received or fired (wet) basis For which parts the Wahl factor and Lewis form factor used ? Fuel cycle a series of sequential steps involved in supplying fuel to a nuclear power reactor. Which reactor produces more fissionable material than it consumes ? What does angular momentum mean? The concentration of U-35 in the uranium hexafluoride is increased from the 0.7% in natural uranium to to 4%. 29. What are two essential conditions of perfect gas ? 79. Such elements are silicon, chromium, molybdenum, tungsten, titanium and niobium. Volume. How would y… Draw a neat sketch of worm and worm wheel, name the partsof the machine and write V.R of the machine As compression ratio increases, thermal n increases. 123. It is least when compression process approaches isothermal. 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. 16. 116. Fully solved examples with detailed answer description, explanation are given and it would be easy to understand. (b) dry or moisture free basis Liquid hydrogen has higher burning velocity. Manganese increases tensile strength and hardness. 17. Eutectoid alloys are the alloys for which two solid phases which are completely soluble become completely insoluble on cooling before a certain temperature called eutectoid temperature. 121. When added in amounts up to 2.5%, the ultimate strength of the steel is increased without loss in ductility. Which reactor uses heavy water as moderator ? On ultimate analysis. 145. Axis. Large forgings in alloy steel are particularly sensitive to this phenomenon. How much is the work done in isochoric process ? What is isotropic material ? What is the difference between proof resilience and modulus of resilience ? 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. HUCR is highest useful compression ratio at which the fuel can be used in a specific test engine, under specified operating conditions, without knocking. Silicon increases the electrical resistivity of steel and decreases hysteresis losses. <�^)>>>><�^)>>>>] 173. Which parameter remains constant in a throttling process ? Nonusable fission products are radioactive and take short/medium/long time for radioactive decay to reach safe level of radioactivity. Then this article can help you with your interview preparation. Which reactor requires no moderator ? 124. 144. Which rays are produced by cobalt-60 in industrial radiography ? 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. 150. (iii) strength to withstand overload without fracture. engine maximum temperature attained is higher than in gas turbine. 67. Pressurised fluidised bed combustion (PFBC) system operates the bed at elevated pressure. It is equal to the work during a constant-volume isothermal reversible nonflow process. This process approaches isobaric when n = 0, isothermal when n = 1, and isometric when n = . 161. View factor is dependent upon geometry of the two surfaces exchanging radiation. State the difference between ultimate and proximate analysis of coal ? Why water can’t be used as refrigerant for small refrigerating equipment ? ���.�8���%��=�� It is the temperature at which the phase change occurs in metals. 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