PERT is based on the approach of multiple time estimates for each activity. Engineering drawing is a graphical language of an engineer to convey one’s ideas most effectively, easily, conveniently and with high speed. What is isotropic material ? Q2. Low water in boiler drum is unsafe because it may result in overheating of water tubes in furnace. What is polytropic process ? Whether individual components in composite materials retain their characteristics or not? Which impurities form hard scale and which impurities soft scale ? Gross heating value because steam is condensed and heat of vapour formed is recovered. In edge dislocation, one plane of atoms gets squeezed out. Magneto hydrodynamic electricity generation. These Questions are Exclusively Provided by JNTU World Team. https://engineeringinterviewquestions.com/piping-engineering-interview-questions-answers-pdf/, plz send Questions to Answers 137. Alloys are therefore more than metals alone. Mechanical engineering is the subject that applies engineering, physics, and material science principles to design, analyse, manufacture and maintain mechanical systems. What does following alloy designation indicate FG 250 ? Which parameter remains constant in a throttling process ? 15. Hydrogen. In which process fluid expands but does no work ? 189. cracks progress between the grains of the polycrystalline material. U 35, Pu 39, U 33 are fissile materials. Required fields are marked *. These Questions are very important in the aspect of Mechanical HR Interview Preparation and Technical Interview Preparation. 77. 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. 32. 1) What is the second law of thermodynamics? Dislocation refers to a break in the continuity of the lattice. Explain the difference between grey iron and white iron. Which is that ? How the waste radioactive material is disposed off ? Isentropic efficiency of axial flow compressor is higher. What is the critical temperature of a refrigerant ? Liquid hydrogen has higher burning velocity. Gibbs function is of particular importance in processes where chemical changes occur. Addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place. What is endurance limit and what is its value for steel ? What is the principle of mechanical refrigeration ? 45. It may be reported as What are the major effects of alloying elements? Such elements are carbon, manganese, nickel, copper and cobalt. 200. The term circulating bed is often used to include fluidised bed systems containing multiple conventional bubbling beds between which bed material is exchanged. Moisture, volatile matter, fixed carbon and ash. Some elements exist in more than one crystalline form. Because a large portion of turbine work is eaten away by compressor and its inefficiency will affect net power output and cost of generation. 94. What for admirality brass used ? Relatively good mechanical properties under compressive loading. It decreases thermal efficiency but increases net output. Which pollutant is major greenhouse gas and what is its effect ? Which reactor has no moderator ? 65. What is the difference between isentropic process and throttlinglprocess ? Download Most Important Mechanical Interview Questions and Answers pdf Book for Fresher Engineering & Diploma Candidates – Below we have listed most commonly asked and basic Mechanical Engineering Interview Questions of technical & HR rounds. An alloy can consist of two or more components. © Copyright 2020, All JNTU World. Mechanical Engineering Interview Questions and Answers pdf Book – Mechanical Interview Questions HR & Technical – Mechanical Engineering Interview Questions with Answers have been provided in pdf format, so candidates can now download Mechanical Engineering Interview Questions – ME HR Interview Questions in pdf format. Water tube boilers raise steam fast because of large heat transfer area and positive water circulation. Whether superheated steam can be treated like ideal gas ? 193. Ferrite is the solid solution of carbon and other constituents in alpha-iron. What is the difference between proof resilience and modulus of resilience ? Explain difference between fissile and fertile materials. 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. In general, an increase in carbon content produces higher ultimate strength and hardness but lowers ductility and toughness of steel alloys. 130. 6. Enough with the facts that explain why the branch has always been considered evergreen, let’s talk about what the branch of Mechanical Engineering is all about and how it caters to this ever-changing world while reinventing itself. Carbon, hydrogen, nitrogen, and sulphur in coal on a weight percentage basis. 47. Under what conditions it approaches isobaric, isothermal, and isometric process ? 154. Why water can’t be used as refrigerant for small refrigerating equipment ? 89. Peritectic. What are these ? Area of the section of the heat flow path, perpendicular to the direction of heat flow. 175. What is the difference between heat capacity and specific heat of a material ? Explain difference between modulus of resilience and modulus of rigidity ? Killed steels are deoxidised in the ladle with silicon and aluminium. Mechanical has always remained immune to such short-lived craze, proving its everlasting effect in the mechanics of the world. So that you can get the best out of it. Explain the formation of microstructures of pearlite, bainite and martensite in steel. What do you understand by fuel cycle in nuclear plants ? 102. (i) Rigidity—Elastic modulus and yield strength 106. Thus, for a 15% by weight solution of sodium chloride in water, the specific heat would be approximately 0.85. 8. 82. Coal is a naturally occurring hydrocarbon that consists of the fossilised remains of buried plant debris that have undergone progressive physical and chemical alteration, called coalification, in the course of geologic time. 27. Silicon in excess of 2.5% causes brittleness, and amounts higher than 5% make the steel non-malleable. 4. What is the difference between isotropic and anisotropic materials ? 191. What is pitting ? To alter the transformation temperatures and times. What are these ? What for pyranometer is used ? 181. The process of splitting of nucleus into two almost equal fragments accompanied by release of heat is nuclear fission. Pressurised water reactor. Why ? Resistance to oxidation and surface stability of steel are increased by the addition of silicon. Thus weight of coolant gets reduced and smaller riadiator can be used. 53. 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.