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What are some of the best interview questions asked for a mechanical engineering student? Quora
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What are some of the best interview questions asked for a mechanical engineering student? 34 Answers Sas Mr, Working in a power plant manufacturing company Updated Sep 14
I cleared the BHEL written exam and was called for interview. No GD. Interview was for the post of Executive engineer /E1 grade. It was a 10 minutes interview with 5 persons in the panel.Among them atleast one was an IAS officier. Vaccant post : called candidates = 1:4 ratio. Loads of question were asked momentarily.Some question I remember are:
1) Take your seat.Why are you sweating? Are you nervous? No sir. Actually... little bit. This is my first interview for a core company.(They smiled at me).
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2) What is an IC engine and how does it work? Explained from text book knowledge.
What is the best way for a mechanical engineering student to prepare for job interviews?
3) Difference between petrol engine and diesel engine.Why their milage differs. Explained properly. 4) What will happen to the room temperature if you turn your room in to a closed system by closing all the door and window perfectly and then you open the door of the room refrigerator that is in running condition. Got puzzled.but answered as temperature of the room will increase since input is always greater than output of the system. 5)What actually entropy is? Explain me since I know only farming. ;-) I tried to explain entropy as a disorderness of a system without explaning any mathematical formula and interviewer nodded approvingly. 6)Tell me quickly ,Two co-cenric circle rolls together up to 3 mtr.Now tell me whether both the point has travelled same distance or not.
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Its the perimeter they are travelling. So
obviously different.
7) Explain how a human walks by using friction.What kind of friction is involved (static friction or rolling friction). Answered though not sure. 8)What is dovetail milling.Why class 3 lever is used in reality. Explained 9)What is the need of riser in moulding? Explained riser as a checking process to confirm the molten metal has filled the cavity or not.but interviewer didnot agree indicating me for any other reason.closed my eye and took 5 sec and explained. riser works as a backup reservior of molten metal when the cavity metal volume shrinks due to solidification. Interviewer happily agreed.I was like 'God saved'. 10)Gave me a paper and pencil and asked to draw a carnot cycle and explain it. Explained it.(never forget to give the directional arrow sign for any mechanical cycle.mind it.That is a test too) 11)Asked me bout posting preferences.If it is Ladakh will it be okay for you? Had to agree by thinking I can drink coffee in the cold ;).Interviewer gave a strange look. 12)Why do you want to quit the biggest IT MNC since this sector is surging? Told it honestly.Mechanical attracts me more and I will be surging along with BHEL. After their whispering internal discussion they told "ok.you may leave".
Result: Selected. There are thousand of question you can be asked to be judged.You need to be thorough with the text books first.Rests are presence of mind and your originality. All the best. Edit1: I did not think of so many likes and views (56.2K). It does feel good. Thanks guys. Hope you get success in career and life ahead. 81.9k Views · View Upvotes
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What is the best prep material for mechanical engineering interview questions? What are some technical interview questions asked to mechanical engineers in their campus placements? What are some common questions asked in mechanical placement interviews? What is the most bizarre/toughest/oddest question you have been asked in a job interview? What are some interesting questions asked in an interview?
Mahendar Hariharan, Mechanical Engineer Automotive Sector Updated Nov 15, 2015
Thanks for the A2A. I would like to highlight some general points about mechanical interviews. You can enter the interview stage only if you have passed the written test (Technical and aptitude). All
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interviews will always start with "Tell me about yourself". Then they will shift to your resume and if they are interested in any of your doings you will be questioned on that. So be careful on resume preparation and include only things that you have done and have good knowledge in it. Next, based on the title and role of the job, the interview varies. They will test you on the areas where you will be put to work if you are selected. So vary your resume according to the company profile (For example: Areas of interest). If you have convinced the interviewer till now. Then you will be checked whether mentally you are ready for the job and whether you can work in a team. They also see whether you are looking for a long term commitment. If you say that you will be going for higher studies in an year, you will surely be rejected. This is the general process and in some interviews the technical and HR rounds will be separated. But the procedure is same as said earlier. To put it in a nut shell: 1) Prepare your resume properly. Be thorough in all the things you have specified. 2) Show your skills and willingness to take up the job is selected. 3) Be yourself. 4)Admit if you are not sure of something. Don't try to manage.
All the best
EDIT 1: I would like to add few more things. 1) Make yourself thorough with the first 2 or 3 chapters in basic Mechanical books. By that i mean, Kinematics - R.S.Khurmi Dynamics - R.S.Khurmi Thermodynamics - Rajput Fluid Mechanics - Bansal, Rajput or Khurmi Engineering Graphics - K.V.Natrajan Strength of materials- R.S.Khurmi Manufacturing Technology - VJ Ragavan ;)
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These are the few books i referred and the choice is yours but make yourself thorough in first 3 chapters of these subjects. Because all the basics for that subject wil be discussed in those and mostly you will be questioned in that during an interview. 90% Success is assured. 2) Then choose one or two subjects from the above and study it top to bottom. This makes your area of interest. 3) Very rarely you will be asked some tricky questions and if that happens use your brain if its beyond your knowledge. They will be testing your presence of mind sometimes. I will keep editing if anything strikes me. 19.9k Views · View Upvotes · Answer requested by Aneek Raj
Akshay Vaishnav, Design engineer and Powertrain lead @GT Motorsports, Formula Student Team, GTU Written Aug 1, 2015
I'm sharing this question list to fellow mechanical engineers that I made to prepare for an interview. It contains two sections viz. technical questions followed by HR questions. 1. Technical questions: Type of technical questions asked will be definition type and that too from basic. Your favorite subjects will be asked first and then they start questioning what they want you to answer.Some of the questions are... 1. Why we do not use same technology to start both SI/CI engine? 2. Which one is more efficient? A four stroke engine or a two stroke and why? 3. 4 Stroke engine is more efficient primarily Because of the presence of valves which precisely control the flow of charge into the chamber and exit the exhaust gases with proper timing which is hard to achieve by ports in a 2 stroke engine. 4. Why there is no differential in a train. What happens when a train takes a turn? 5. A cantilever beam is loaded a point on its ends what will be the effect in shear force? 6. Why vehicle does not move when its gear is applied though parked in slope area? 7. What is shear force in fluid particle? 8. How gear ratio helps in power variation? 9. What is the angle of twist in drill? 10. What is the difference between impact force and sudden force? 11. How to calculate the turbine efficiency? 12. Why centrifugal pump casing is called involutes casing? 13. What will happen if reciprocating compressor run in exactly opposite direction? 14. What is the effect of clearance volume in performance of air- compressor? 15. What is the advantages and disadvantages of critical speed of turbine? 16. What will happen if oil is mixed with boiler feed water? 17. What is difference between fan and blowers? 18. What are the protections required to protect turbine? 19. what is critical temperature? 20. Air is a bad conductor of heat. Why it becomes hot in summer? 21. How many stages in compressor in there in gas turbine? 22. Which is more efficient? A rear engine Volvo Bus or a Front engine Volvo Bus? (Engine Capacity is same for both) why? 23. What is difference between stress and pressure? 24. What is Boiler HP? 25. What is Auto Dosing? 26. What happens when too much oil is injected in the working cylinder? 27. How many manholes should be there on boiler? Why? 28. What is used to check the amount & quality of fuel in two stroke IC engine? 29. Work done in throttling process is given by which formula? 30. Function of the strainer in IC engine? 31. What is the difference between the air pre-heater & air blower? 32. Why the compression ratio of the diesel engine should be high? 33. A vertical plate and a horizontal plate are suspended in an open room. Both are heated to the same temperature. Which one will cool first? Why? 34. What is the color of flame if the boiler is running? 35. Which is the best lubricant-air, oil or water? 36. Tell the octane number in Indian petrol?
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37. Difference between enthalpy & entropy? 38. What is the difference between safety valve and relief valve? 39. Explain cooling and its types? 40. What is the working principal of air compressor? 41. What is cryogenics and what are its fundamentals? 42. What is the difference between a shaper machine and a planner machine? 43. Why stress relieving of stainless steel is not proffered? 44. What are the advantages of PID controllers compared with those of a PLC? 45. Which two continents are mirror images of each other? 46. Where half nut is used? 47. What is the need for drafting? 48. Turbo charger driven by.............? and what its speed 49. Why...? Turbo charger used in DG....? 50. The stage below saturation is called? 51. Why is a condenser used in a Rankin cycle? 52. What is servo motor? 53. Can we use light duty vehicle axle into the heavy duty machinery axle? If no then why? 54. Stress strain diagram for fluid? 55. Where manning formula used? 56. What is level of documentations for a ISO 9001 certified company? 57. What is back plate in centrifugal pumps and its purpose? 58. Why tyres are manufactured in black colour? 59. Whether ductile material can fail in brittle manner? When? 60. On what property u can distinguish material as brittle or ductile? 61. Name fuels used in nuclear power plant? 62. On what thermodynamic cycle nuclear power plant works? 63. How can you increase the efficiency of power plant without changing in effort? 64. What is purpose of governor in Diesel engine? 65. Why petrol engines have more power than diesel engines of same capacity? 66. What is the difference between Torque and Power ( layman Idea)? 67. What will be the induced stress in the bar? 68. What is the Difference between Rated Speed and Economic Speed? 69. How to convert from HP to BHP or CC to Bhp please explain???????? 70. How the material no. 2062 will mild steel of density 7.85? What are the other codes? 71. Why petrol engine gives more power than diesel engine even though diesel engine has high compression ratio? 72. What is mean by Resistance welding? 73. Compare Brayton and Otto cycle. 74. Why we have to know the specific frequency of any equipment? does anybody know about specific frequency ? 75. What is pulverization? 76. What is the function of an isolator? 77. Why the back wheel of tractor is bigger than front wheel? 78. Flow will increase or decrease or remain same? 79. Why Mechanical seal used in Pumps? 80. The ratio of Emissive to absorption power of heat by a body is equal to heat emitted by a perfect black body. Who said the statement 81. What is colour of flame if the of Halide Torch detects a refrigerant leakage? 82. How can we remove paint from (painted over)plastic or nylon objects with out damaging the object? 83. How to calculate or arrive the capacity of a mechanical press? 84. The property of a metal that is determined by the indentation on a metal surface 85. The amount of thickness of the metal sheet that can be welded by ultrasonic welding is? 86. The amount of carbon present in Cast Iron? 87. Numeric control is used for? 88. The amount of moisture that is to be present in wood to be called dry wood is? 89. The pattern material used in Investment casting Process is? 90. What is the use of offset follower in cam? Why and where we have to use this type of follower? 91. What is the use of offset follower in cam? Why and where we have to use this type of follower? 92. State the difference between Forging & Fabrication? 93. What is flange rating? 94. What amount of heat energy loss in ESP? 95. What happen when diesel is injected in petrol engine? 96. What do you mean by property of system? 97. Why joule-Brayton cycle is not suitable for a reciprocating engine.
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98. How does “turbulence” differ from swirl? 99. Is octane number beyond 100 is possible? 100. Explain the effect of fuel structure on knocking. 101. Discuss the advantages and disadvantages of LPG as a fuel in S.I. Engine? 102. What is the impact of using throttling device instead of expander in vapour compression cycle? 103. What is moisture choking? Which refrigerants are more prone to it? 104. What is Montreal protocol and why CFCs are being phased out? 105. Why reverse Joule Brayton is used in aircraft refrigeration system? 106. Explain how solar-energy can used in refrigeration system? 107. Is wet bulb temperature a thermodynamic property? 108. What is the utility of comfort chart? 109. How would you decide whether a reciprocating compressor or centrifugal compression is to be used in a refrigerating system? 110. Why smoking is not allowed in air conditioned enclosure? 111. Why desert coolers become ineffective in raining season? 112. Why package units are being preferred over central air conditioning system? 113. What is MAPI. 114. What is capital budgetary? 115. What is group technology layout? 116. What is leveling & smoothing in production technology? 117. What is deference between method study & work measurement? 118. What you know about drilling? 119. How oil is produced? What is the size of well? 120. Pumps used in drilling procedure and why? Why not centrifugal pump? What if we want high head and high discharge? 121. Difference between Pipeline and Piping ? 122. Use of CNG, LNG, LPG etc. Additional questions subject wise: Fluid Mechanics and Fluid Machinery What is the difference between impulse & reaction turbine. Explain unit speed, unit discharge unit power & specific speed. Explain NPSH, in which parameter it depends on. What is jet ratio? What is Deriaz turbine? Which turbine is good for tidal power plant? What is Navier-stroke equation. What are the significance of Mach number Weber number Material Science What is quazi-crystal? What do you understand by a free cutting steel? What elements are usually added to make a steel free cutting, & how they make the steel free cutting? Explain various method of hardening of steel? What do you understand by the term “Arrest point” in connecting with heat treatment of plain carbon steel? What influence does grain size have on the mechanical properties of metals. Describe the difference between brittle and ductile fracture. What is the difference between natural & artificial aging? Thermodynamics What is availability function for a closed system? If it is possible that entropy of a system can decrease during a given process? What is dead state in thermodynamics? What is exergy?
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What are some of the best interview questions asked for a mechanical engineering student? Quora What happens to triple point line when projected to P-T plane? What is compressibility factor and what is its value for Vander walls gases. What are initial conditions for formation of shock waves? What do you understand by choking in nozzle flows? Is it possible that pressure and velocity decreases simultaneously/ Distinguish between “Available energy” & Availability? What is pure substances. What is critical point? What is the value f critical temperature, pressure & volume of water? What is sublimation curve, fusion curve & vaporization curve? What is Rayleigh Line & Fanno Line? What is normal shocks & when its occurs? What is High Grade Energy & Low Grade Energy?
Heat & Mass Transfer What is Newton’s Law of cooling. What is Recuperator & Regenerators? Whether fin can actually reduce heat transfer? is it possible? When? What is difference between Biot no. & Nusselt no? Which one is greater, thermal boundary layer or hydrodynamic boundary layer? What is film temperature in forced convection flow? What is fully developed region and where it is applicable? What is the critical radius of insulation, explain clearly in terms of thermal resistance and heat transfer rate? At what case do you recommend Fin? What is the difference between free convection & forced convection in what parameter forced & free convection depend. Internal Combustion Engine What is the use of Carburetor in SI Engine, There is trend towards increases of injection system in Automobiles, Explain. Why Supercharging is not popular with SI Engines? What is performance number. Explain Knocking in SI Engine & Mention, the factor that tend to reduce Knocking? Explain the difference between Knocking in SI Engine & CI Engine? How does “Turbulence” differ from “Swirl”? Name some Antiknock additive and explain the Mechanism by which they reduce the knock? Power Plant engineering What is slip ratio in thermal power plant? In Pendant super heater whether parallel flow or counter flow heat exchange between steam and flue gases. What happens to mass flow in case of supersaturated flow? Why clearance are provided in reciprocating compressor? Explain turbojet & Rocket Engine. What’s the advantage of compounding of steam turbine? What’s are boiler mounting & accessory. Draw the sketch of pulse jet engine. What are its main advantage & disadvantage? Explain working principal of scram jet engine, what is advantage over the ramjet?
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What are some of the best interview questions asked for a mechanical engineering student? Quora What are the advantage of nuclear power plants over thermal power plants. What is fast breeder reactor? What is circulation ratio and what is its range in power plant? One 2-row Curtis turbine is equivalent to how many reaction turbines for same value of blade velocity and angle of nozzle? What are thermal neutrons? What is breeding ratio? What is the application of jet and rocket technology? Which is used in missiles?
Strength of Materials What do you mean by equal strength in a beam? What is difference between pure shear and simple (normal) shear? Is it possible that decrease in area gives a decrease in stress? Whether shear stresses are always parallel to shear forces? By which experiment, you find it toughness of material. Distinguish between direct stress & bending stress. What do you mean by Torsional rigidity & lateral rigidity? Define “slenderness ratio”. How it is used in long and short column? Machine Design What are rolling contact bearing? What are the anti friction bearings? What is stress concentration factor? What is the bolt of uniform strength? What is the difference Static Load carrying capacity & Dynamic Load carrying capacity? Why we are not using the unit joule for torque instead of N-m. What is Low cycle fatigue failure and High cycle fatigue failure? What are considerations of these while designing a machine? What is mechanical advantage? How trains take turns though there is no differential gear? Do you know epicyclical gear box? What is the practical application of epicyclical gear box? What is tooth profile? Which one is better? Theory of Machines What is Keneddy theorem? Do we need a screw with efficiency less than 50%? What is backlash? What is damping ratio? Define Resonance. Define critical speed or whirling speed or whipping speed. What is machine? Giving example, Differentiate between a machine & structure. What is Mechanical advantage. Refrigeration and Air-conditioning What is utility of comfort chart? hat is wet compression? To maximize COP what should be the condition of vapour at suction to compression?
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What are some of the best interview questions asked for a mechanical engineering student? Quora What is the range of NBP (normal boiling point) in case of most refrigerants? Why COP of CO2 gas is less and still why it is used in transport refrigeration? What are the most crucial parts in reciprocating compressors? How compressors are selected based on type of refrigerant? What is correlation between wet bulb temperatures an adiabatic saturation temperature? Why isothermal compressor is Desirable? What is desirable property of ideal refrigerant? Define effective temperature & what is the optimum design condition for comfort for summer A/C?
Production Engineering Why arc is slowly extinguished in case of arc welding? Which inert gas is commonly used for thin work piece and which inert gas for thick work piece? What is friction welding? What is difference between brazing & braze welding? Why hole basis system is adopted in manufacturing? What is 3- 2-1 principle? Where diamond pin locator is used? How presses are rated? What is spring back? What is difference between fillet and corner radius? What are overhead costs? Why depreciation is to be taken into account in industrial management? Why breakeven point is important in any industry? What is sine bar? What is marginal cost and marginal revenue? What is shear and where it is provided in case of punching and blanking? What is angle of bite? What is extrusion ratio? What is gutter and where it is used? Which process is used for making nuclear reactor fuel rods? What is difference between Amorphous and crystalline solids? What are the various method of inspection of casting for internal & external defects? Why are allowances provided for in the production of patterns? What do they depend on? What is the deference between soldering & brazing? What is meant by solid-state welding explain. What is cold welding? Describe the principal behind resistance welding processes. What function should a lubricant perform in manufacturing process? Explain the difference between punching & blanking. Explain the difference between discontinuous chips and segment chips. Explain the different type of tool wear. What is difference between oblique & orthogonal cutting. What are the main difference between jig and fixture?
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What is Producer risk What is Consumer’s risk What is JIT approaches? What is group technology? What are its main advantages? Define the term “production & productivity. What is the significance of ISO 9000 series & 1400 series. What is artificial intelligence? Which welding process does not required any filler material? What is tack weld? Which process used for cutting thicker plates? Where drooping characteristics of power source is required in arc welding?
2. HR questions: 1. Tell me about yourself? 2. What is your hometown famous for? 3. Tell about your achievements in life. 4. Your strengths and weakness 5. Are you a team player? 6. Tell me about your ability to work under pressure. 7. How would you know you will be successful on this job? 8. Describe your management style. 9. Global warming 10. Chief justice of India 11. Vice President of India 12. CEO of Apple, when did he die? 13. Gas scenario 14. RBI policy 15. Corporate Governance 16. Corporate Laws 17. Cast system is boon or bane ? 18. What’s the difference in the modus operandi of Amir Khan’s “Satyameva jayate” and Anna Hazares movement? 19. What will u do on your part to remove corruption? If you travel in a train without confirmed ticket will u bribe the TT for a seat? 20. What do u mean by optimistic. Is it always good to be optimistic or it helps sometimes to be pessimist? 21. What is difference between confidence and over confidence? 22. What is the difference between hard work and smart work? 23. What are your goals? 24. What motivates you to do a good job? 25. What makes you angry? 26. Give an example of your creativity 27. Describe ideal company, job, and location? 28. What are your hobbies?
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29. Inspiration in your life and why? 30. What was the toughest decision you ever had to make?
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31. Define success? and how do you measure up to your definition 32. About present job (if employed) 33. Why did you resign from your previous job? 34. Why have you been unemployed so long? 35. What was the toughest challenge you have ever faced? 36. What would you say to your boss if he is crazy about an idea, but you think it stinks? 37. Why should I hire you? 38. Explain how you would be an asset to this organisation. 39. If we give you a job will you leave IIT B or your organisation? 40. What changes would you make if you came on board?
Thanks Akshay. 51.9k Views · View Upvotes · Answer requested by Shashank Singh and Harsh Tapiawala
Aneek Raj, AIR 19, GATE 2015 | Certified Tea Addict. Updated May 22, 2015
Company : MDL (Mazagon Dock Limited) Questions : Q: Tell me something about yourself and your family background. me : told. Q: Which city in Nepal is attached to the border of Bihar ? me: I didn't knew (They told me it's Birganj ) Q: Give us an overview of your summer internship. What was its practical application? Try to keep it as short as possible. me: told Q: What was you B.Tech project about? Explain in detail. me: told. Q: What does MDL (company's name) do? me: It makes warships, ship buildings and offshore vessels for companies like ONGC. Q: Apart from MDL where else have you applied for? me: ONGC, NTPC, IOCL and BARC. Q: Tell me your area of interest? me: Thermodynamics and fluid mechanics (they started laughing because this was the area of interest common in more than 90% candidates they interviewed) Q: Draw the P-V and T-S diagram of otto cycle. What does 'S' in 'T-S' stands for? me:
'S' stands for entropy. Q: Out of 4 stroke and 2 stroke SI engine, which one has better fuel efficiency? What about
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Power efficiency? me: fuel efficiency of 4 stroke is better and power efficiency of 2 stroke is better. Search for questions, people, and topics
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Q: So it's my final question. Suppose if you get selected in any of the above companies, would you prefer MDL over these companies? me: Sir both,my internship as well as my B.Tech project, were based on design and I would like to join a company which allows me to explore in this field, so I will surely join mdl because there is not much to explore in design field in the above mentioned companies. (They seem pretty satisfied with my answer) Advice : Thoroughly prepare your B.Tech Project and summer internship. It consumes about 70% of the total interview duration. Prepare Fluid mechanics, IC engines and Manufacturing for technical. Be ready with your answers for HR questions. EDIT: I was selected. 66.7k Views · View Upvotes
Umang Pabari, Freelance cricket statistician and writer Written Nov 11, 2015
Here are some general technical questions that i would like to recommend you to solve or at least have an eye on those questions so that whenever in an interview someone asks you a question at that time you don't feel strange with those questions. If you want to have a set of 1000 technical questions for interview and along with that i will provide you a set of HR questions( if you want) also but for that you have to mail me at
[email protected] any time or you can message me either on quora with your mail id or on facebook and here is my facebook account : Facebook Here is a list of 200 questions that i would like to share with you guys. 1. What is the difference between scavenging and supercharging? 2. What are the names given to constant temperature, constant pressure, constant volume , constant internal energy, constant enthalpy and constant entropy? 3. In a Rankine Cycle, if max. steam pressure is increased keeping steam temp. and condenser pressure same , what will happen to dryness fraction of steam after expansion? 4. Why entropy change for a reversible adiabatic process is zero? 5. What are two essential conditions for perfect gas? 6. Entahlpy and entropy are functions of one single parameter. Which is that? 7. Why rate of condensation is higher on a polished surface than compared to rusty surface? 8. How much resistance is offered to heat flow by drop wise condensation? 9. What is the relationship between COP of heating and cooling? 10. How much is the work done in Isochoric process? 11. When max. discharge is obtained in nozzle? 12. Under what condition work done in reciprocating compressor is least? 13. What is the difference between stalling and surging in rotary compressor? 14. Why the electric motor of a fan with backward curved blades is never got overloaded under any condition? 15. Why the work per kg of air flow in axial flow compressor is less compared to centrifugal compressor for same ratio? 16. What is the name given to portion of thermal energy to be necessarily rejected to environment? 17. What is pitting ? How it is caused? 18. What is caustic environment? 19. Which impurities form Hard scale and which impurities form soft scale? 20. What is the difference between hard water and soft water? 21. Which two elements of feed water can cause corrosion of tubes and plates in boiler? 22. What should be done to prevent a safety valve to stick to its seat? 23. Why large boilers are water tube type? 24. What type of boiler does not need a steam drum? 25. Why manholes in vessels are usually elliptical in shape? 26. Low water in boiler drum is unsafe because it may result in overheating of water tubes in furnace. Why it is unsafe to have high water in boiler drum? 27. Why boiler is purged every time before starting firing of fuel? 28. What is the principle of mechanical refrigeration? 29. Why high latent heat of evaporation is desirable in a refrigerant? 30. What is the critical temperature of a refrigerant?
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31. Maximum combustion temperature in gas turbines i of the order of 1100 to 10 degree Celsius whereas same is around 00 degree Celsius in IC engine? Why? Search for questions, people, and topics 32. Why efficiency of gas turbine is lower as compared to IC engines?
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33. What do you understand by timed cylinder lubrication? 34. What is IIUCR in relation to petrol engine? 35. In some engines glycerin is used in place of water for cooling. Why? 36. Why consumption of lubricating oil is more in two-stroke cycle petrol engine than four stroke cycle petrol engine? 37. As compression ratio increases , thermal n increases. How is thermal n is affected by rich and weak mixture? 38. How engine design needs to be changed to burn lean mixture? 39. Horse power of IC engines can be expressed as RAC rating , SAE rating or DIN rating. To which countries these standards belong? 40. What is the use of flash chamber in a vapour compression refrigeration cycle to improve the COP of refrigeration cycle? 41. Why pistons are usually dished at top? 42. What is the function of thermostat in cooling system of an engine? 43. What are the causes of failure of boiler tubes? 44. What are the causes of failure for super heater tubes? 45. Why super critical boilers use less amount of steel compared to non super critical boilers? 46. Out of electric heater and Heat pump , which is economical in operation? 47. Which furnace burns low-ash fusion coal and returns most of the coal ash in the slag? 48. How the thickness of thermal boundary layer and thickness of hydrodynamic boundary layer related? 49. What is the effect of friction on flow of steam through a nozzle? 50. Why gas turbine power plant needs efficient compressor? 51. Why rockets using liquid hydrogen have higher specific impulse compared to liquid hydrocarbon? 52. Why axial flow compressor is preferred for gas turbines for aero planes? 53. What is the effect of inter cooling in gas turbine? 54. Why iso-octane is chosen as reference fuel foe S.I engines and allotted 100 value for its octane number? 55. Why thermal efficiency of IC engine is more than the gas turbine plant? 56. Which are the reference fuels for knock rating of SI engines? 57. When effect of variations in specific heat is considered then how do maximum temperature and pressure vary compared to air standard cycle? 58. Quantities like pressure, temperature , density , viscosity etc. are independent of mass. What are these called? 59. The amount of radiation emitted per scm per sec is called..? 60. In convective heat transfer , if heat flux intensity is doubled hen temperature. 61. How you can define coal? 62. Which pollutant is major greenhouse gas and what is its effect? 63. In order to increase efficiency and reduce CO emissions and other emissions , clear coal technologies are receiving major attention. What are these? 64. What are the important operational performance parameters in design of fuel firing equipment? 65. What is the difference between total moisture and inherent moisture in coal? 66. Promixity analysis of coal provides data for a first, general assessment of a coal's quality and type. What elements it reports? 67. Ultimate analysis of coal is elementary analysis. What it is concerned with? 68. Explain the difference between AFBC , BFBC , PFBC and PCBC in regard to fluidised technologies. 69. What is Schmidt plot for is used in heat transfer problems? 70 In which reactor the coolant and moderator are the same? 71. Which reactor has no moderator? 72. What are the thermal neutrons? 73. What is big advantage of fast breeder reactor? 74. What is the purpose of biological shield in nuclear plants? 75. Which two elements have same percentage in proximate and ultimate analysis of coal? 76. On which analysis is based the Dulong's formula for the heating value of fuel? 77. Which element causes difference in higher and lower heating values of fuel? 78. Which heating value is indicated by a calorimeter and why? 79. State the difference between ultimate and proximate analysis of coal? 80. What is the fuel ratio? 81. How the analyses and calorific values can be reported? 82. What is the difference between nuclear fission and fission chain reaction.
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83. Expalin difference between fissile and fertile material. 84. What do you understand by fuel cycle in nuclear plants? Search for questions, people, and topics 85. What is heavy water and what is its use in nuclear plants? 86. What is a convertor reactor? 87. Explain nuclear reactor in brief.
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88. What is the difference between conversion and enrichment. 89. Disposal of radioactive waste materials and spent fuel is a major and important technology. How the waste radioactive material is disposed off? 90. Which nuclear reactor uses water as a coolant, moderator and reflector? 91. Which reactor produces more fissionable material than it consumes? 92. Which reactor uses natural uranium as fuel? 93. Which reactor uses heavy water as moderator? 94. Which reactor requires no moderator? 95. Which reactor uses primary coolant as fluoride salts of lithium , beryllium , thorium and uranium? 96. Why an increase in area is required to produce an increase of velocity in case of supersonic flow? 97. Under what circumstances would there be an increase in pressure in a divergent nozzle? 98. Why water can't be used as refrigerant for small refrigerating plant? 99. Which parameter remains constant in a throttling process? 100 .What is the difference between isentropic process and throttling process? 101. What is the difference between isotropic and anisotropic material? 102. What are orthotropic materials? 103. What is view factor? 104. What properties need to be considered for applications calling for following requirements 1.Rigidity 2.Strength for no plastic deformation under static load 3.Strength to withstand overload with fracture 4.Wear resistance 105. Explain the effects of alloying chromium and nickel in stainless steel. 106. Mention two types of dislocations. 107. What are the principle constituents of brass? 108. What is curie print? 109. Specific strength of material is very high when they are in fiber size but lower when they are in bar from why? 110. What is the percentage of carbon in cast iron? 111. Which element is added in steel to increase resistance to corrosion? 112. Whether individual components in composite materials retain their characteristics or not? 113. An elastomer is a polymer when its percentage elongation rate is? 114. If percentage elongation of a material is more than 200% , it is classed as? 115. Why is it that the max. value which the residual stress can reach is the elastic limit of the material? 116. Why fatigue strength decreases as size of a part increases beyond around 10 mm? 117. Distinguish between creep and fatigue. 118. While normal carburizing and nitriding surface treatments increase fatigue strength , excessive treatment may decrease the fatigue strength. Why? 119. List at least two factors that promote transition from ductile to brittle fracture. 120. Which theories of failure are used for a ductile materials and brittle materials? 121. What does thermal diffusivity of metal signify. 122. For conduction of heat, the instantaneous rate of heat flow is product of three factors, what are these? 123. How convective heat transfer is affected and on what factors it depends? 124. Which is the common element between brass and bronze? 125. What does following alloy designation indicate FG 250? 126. How is ceramic defined? 127. Give one example of metal classified as per structure as BCC , FCC , HCP and CCP. 128. What is the name of solid solution of carbon in alpha iron and delta iron? 129. Explain the difference between pearlite and cementite 130. Give one example each of the following proportion of materials dimensional , physical , technological and mechanical. 131. For which parts the Wahl factor and Lewis form factor used? 132. How oxygen can be removed from steel during melting? What are fully killed steels? 133. Hydrogen cannot be removed easily from molten steel. What harm hydrogen has on property of steel? 134. What is allotropic? In what forms of cubic pattern , iron exists?
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135. What is the difference between alpha , delta and gamma iron? 136. Metals , in general are of low strength and do not possess required physio-chemical and
Search for questions, people, and topics technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and structures of alloys. 137. What is the difference between isotropic and homogeneous material. 138. Explain the difference between the points of inflexion and contra flexure. 139. What is the difference between proof resilience and modulus of resilience? 140. What is the difference between column and strut?
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141. Explain the difference between ferrite , austenite and graphite? 142. Explain the terms solid solution , eutectic , eutectoid and peritectic. 143. What do you understand by critical points in iron carbon diagram? 144. Why PERT is preferred over CPM for evaluation of project? 145. What is percentage of chromium in 18:4:1 IISS? 146. What is stellite? 147. Which rays are produced by cobalt-60 in industrial radiography? 148. What are killed steels and what for these are used? 149. What is critical temperature in metals? 150. Car types are usually made of? 151. What is the structure of pure iron and whether it is soft or hard? 152. Which elements increase the corrosion resistance of steel? 153. What causes hardness in steel? How heat treatment alters properties of steel? 154. Explain the formation of microstructures of pearlite , bainite and martensite in steel. 155. How with alloying of steel it is possible to a achieve properties which cannot be achieved with heat treatment? 156. What are the major effects of alloying elements? 157. What is the difference between austenite stabilisers and ferrite stabilisers? 158. What are the effects of carbon on the properties of steel? 159. What is the role of silicon as alloying element in steels? 160. Discuss the role of manganese in alloying steels. 161. Define buckling factor. 162. What do you understand by catenary cable? 163. What is coaxing? 164. What is difference between conjugate beam and continuous beam? 165. What is isentropic material? 166. Explain difference between modulus of resilience and modulus of rigidity? 167. What is the difference between basic hole and basic shaft? 168. What for pyranometer is used? 169. Describe transfer machines in brief. 170. What is burnt-out point? 171. What do you understand by eutectic? 172. Explain the difference between grey iron and white iron. What is mottled iron? 173. The graphite in grey irons exists in the form of flakes which act as stress-raisers under tensile loading and consequently grey irons have relatively low tensile strength and ductility. Still grey iron is extensively used in engineering. Why? 174. Under what condition a convergent divergent nozzle required? 175. What is endurance limit and what is its value for steel? 176. How the net work to drive a compressor and its volumetric efficiency behave with increase in clearance volume? 177. What do you understand by sulphur print? 178. What is the effect of addition of zinc in copper? What is the use of 70/30 brass? 179. What is the difference between brass and bronze? 180. What for admirality brass used? 181. What is the maximum use of magnesium? 182. What for zinc finds application? 183. Which factors influence the type of fracture in failure of a material? 184. What is the name given to the ratio of actual cycle efficiency and ideal cycle efficiency. 185. List two effects of manganese in plain carbon steels. 186. In which process internal energy remains constant? 187. What is VSD? 188. What is temper embrittlement in alloy steels and what are its effects? 189. What are whiskers? 190. What is Bauschinger effect? 191. What is the difference between heat capacity and specific heat of a material? 192. Explain the rule to find specific heat of aqueous solutions. 193. What do you understand by latent heat ? Give four examples of latent heats. 194. Define the terms free energy and free enthalpy. What is their significance and importance?
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195. Whether the superheated steam can be treated like ideal gas? 196. Out of constant pressure and constant volume lines on TS diagram which line has Search for questions, people, and topics higher slope? And whether slope is constant or variable? 197. Whether entropy is intensive property or extensive property? 198. In which process fluid expands but does no work?
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199. What is Hess law? 200. What is the purpose of scrapper ring? All the best. Thanks, Umang Pabari. 11.7k Views · View Upvotes
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Paden Johnson, Introvert, Computer nerd
No. And I used to do cold calling. Being
About 12 years ago, I had a crush on this
hung up on is part of the job, and you
guy. We were in the same class in our 9th
often get training on how to deal with it
Grade. We smiled a couple of times but
(learn to ignore it and move on). After a
never spoke. About 5 years later, I started
few times, you kind of just block it out and
searching for him on Orkut. Bang! Found
move down the call list. But, I do take
him. Now I have to make a move to talk to
issue with people who make fun of or play
him. I said I was organizing a re-Union
pranks on telemarketers. Sure they can be
and was trying to gather everyone. He said
annoying or even aggressive. But the
that's a great idea. And then came the day Read More
person who actually called yo... Read More
Updated Nov 23
This one’s easy. Does Mike Wazowski blink or wink? Whoever has me at my death bed would simply sit there scratching his/her head. This buys me a good laugh before I die and maybe even a little time to attempt escape. Read More
when we actually are su...
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