Mechanical Engineering Thermodynamics Job Interview Questions

Thermodynamics Interview Questions And Answers

Q. 1 What material is mostly preferred in the designation of vane in water turbine?

Ans. Aluminium nickel its n alloy.

Q.2 What happens if foundry sand contains 1) excessive clay 2) excessive moisture?

Ans. If excessive clay than cavity get damaged before the process due to dry less of clay and irregular in shape due to more water content because to set the cavity it takes more time.

Q.3 What is the Carbon percentage in Diamond?

Ans. 98% of pure carbon of fine structure. (.5 -1.5).

Q.4 What is the meaning of cyclic process in thermodynamics.explain with example?

Ans. In a cyclic process, the system starts in a particular state and returns to that state after undergoing a few different processes is called cyclic process.

Q.5 Can the( energy change) of a system during a process be negative ? why ?

Ans. Yes, It is possible. In some process system produce energy while in others it receive energy.

Q.6 What is the principal of optical instruments ?

Ans. Optical instructor can be use to align two machine parts for example tool in the tool post... its can b used as an alignment tool.

Q.7 What is the difference between enthalpy and entropy?

Ans. Enthalpy: Total heat content of the body.ENTROPY:Degree of randomness and disorder of molecules.

Q. 8 A manometer is used to measure
A.low pressure
B.moderate pressureC.high pressure
D.atmospheric pressure
Ans (C) High Pressure

Q. 9 A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
A.Carnot cycle
B.Stirling cycle
C.Otto cycle
D.Diesel cycle
Ans. (D) Diesel cycle

Q.1. What is anisotropy ?

Ans: The phenomenon of different properties in different directions is called anisotropy .

Q.2 What is is entropic exponent ?

Ans: It is the ratio of the specific heat of a gas at constant pressure to the specific heat at constant volume.

Q.3 The intensity of stress which causes unit strain is called
1. unit stress
2. bulk modulus
3. modulus of rigidity
4. modulus of elasticity
5. principal stress.

Ans. Modulus of elasticity.

Q.4 The unique property of cast iron is its high
(a) malleability
(b) ductility
(c) surface finish
(d) damping characteristics
(e) hardness.

Ans. (d) damping characteristics

Q. 5 Density is
1. Physical property
2. Chemical property
3. Extensive property
4 Intensive property

Ans 4 Intensive property

6 Horse power equal to ______ ???
1. 546 w
2. 676 w
3. 746 w
4. 776 w

Ans. 746 W

Q.7 3.)What is saybolt seconds universal ?

Ans: Saybolt Seconds Universal (SSU) is the unit of viscosity and is equal to the time required for a gravity flow of 60 cc through saybolt universal viscometer.

Mechanical Quality Automobile And Production Engineering Questions

Quality Engineering Interview questions

Q. What instrument is used to measure the height of the product?

Ans. Height gauge is used to measure the height manually.

Q. What instrument is preferred to measure the internal diameter of a cylindrical pipe?

Ans. Vernier Caliper is used to measure the internal diameter of the hollow pipe.

Q. What is the difference between digital micrometer and ordinary micrometer?

Ans. Digital micrometer differ then the ordinary micrometer in the sense of accuracy. The accuracy of digital micrometer is 1 micron while the accuracy of ordinary micrometer is 10 micron.

Q. What is the tolerance of the digital micrometer?

Ans. 0.001

Q. What machine is used to measure the exact coordinate of the finished job up to 5 dimensional accuracy?

Ans. Coordinate Measuring Machine (CMM)

Q. What is the necessary process to be done before changing the probe of CMM.

Ans. This process is known as the calibration of the probe. It is done with the help of Master Probe.

Q. What is the basic unit of measurement used in almost all the manufacturing measurement process?

Ans. MM or millimeter

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Automobile Engineering Interview Questions

Q.1 Why exhaust pipe of an automobile is located behind the rear wheel? Can arrangements be made for it to be in the front portion of the automobile.What will be the problem then?

Ans. 1 A better technical application might be that if the exhaust pipe is placed in front then as the car moves forward, there is obstruction in the flow of exhaust gases and due to the back pressure the smoke flows back to the engine chamber, which would affect the mixture strength of the fuel making the air fuel lean mixture, as a result decreasing the performance of the engine.

2 If locate in front many affects are there smoke affect the inlet air,affect the driver.so locate in back it based on newton 3rd also.and prevent the many effects.to get many advantage

3 The silencer show be a lengthy one. If you place in front then there wont be any thermodynamically effect to the engine but there are commercial effects like your bike color will become fade by the carbon content, your respiration will effected and your bike style will look odd.

Q.2 When i take first gear in a bike firstly apply clutch why? And when speed of bike in running position you can't apply clutch why?

Ans. Because the clutch plate must be free from flywheel and power transmission stop so to use gear or changing of gear should be at this position and on running power transmission continuous, so never take clutch without down the accelerator.

Q.3 . What causes white smoke in two stroke locomotive engines?

Ans. That is the engine running too lean (lack of fuel). This condition will lead to overheating and failure of the engine.

Q.4 How does iron ore turn into steel?

Ans To make Steel, Iron Ore is refined into iron and all the carbon is burned away using very high heat (Bessemer). A percentage of Carbon (and other trace elements) are added back to make steel.

Q.5 When Clutch Pedal is pressed the engine rpm is ?

a.reduced

b.increases

c.constant.

Ans. Constant

Automobile G K Questions

Q. 1 What were the problems in simple carburetor?

Ans. 1 Less volumetric efficiency.

2 Mal distribution of air fuel mixture in multi cylinder engine.

3 Ice Forming

4 Problem in turning due to tilting of carburetor.

Q.2 What are the three sub systems of electronic fuel injector?

Ans. 1 Fuel delivery system, 2 Air induction System, 3 Electronic control unit.

Q. 3 What are the main components of automobiles?

Ans. 1 Engine,2 Clutch,3 Gear box,4 Universal Joint,5 Propeller Shaft,6 Differentiator.

Q. 4 Why maintenance is required in automobiles?

Ans. 1 Safety of automobiles,2 Reliability of the automobiles,3 Lognitivity of the automobiles,4 Comfortable driving of automobile.

Q. 5 What are the type of lubrication systems?

Ans. 1 Petrol Lubrication system, 2 Scrap feel system, 3 Forced feed lubrication system, 4 Combination of scraps and forced feed system

Q.6 What are the type of fuel injection system in CI engines?

Ans. 1 Air Injection System, 2 Airless Injection System. ( a Common rey injection system,b Individual Pump injection system.

Q.7 What is a master leaf in suspension system?

Ans. The uppermost longest leaf having bushes at its two ends, is known as master leaf.

Q. 8 What is the material of leaf spring?

Ans. Leaf springs are made of

1 medium carbon steel about 0.55 % C,

2 Silicon alloy steel having about 2%Si,1%Mn and

3 Chrome manganese vanadium alloy steel having about 1.5% Cr, 0.6% Mn, and 0.2% V.

Q. 9 How power is generated in the cylinder of IC engine?

Ans. Air is sucked during the crank motion and on compression stroke fuel is injected on it by the nozzle and the automization and vapourisation takes place. Now at proper temperature and pressure this air and fuel mixture starts burning and the chemical energy of the mixture is converted into pressure energy and this pressure energy pushed the piston and hence mechanical power is generated by the piston movement.    

Questions on Breaking System

Q. 1 What are the requirements of efficient breaking system?

Ans. The breaking system that stop the vehicle within the smallest distance is called efficient breaking. It is used to sop the vehicle and to control the speed during operation.

Q .2 What are the advantages of hydraulic breaking system?

Ans. Hydraulic breaking requires less breaking effort, and breaking effort is equal to all four wheels.

Q. 3 What is the working principle of hydraulic break?

Ans. Pascal's law.

Q. 4 What is Pascal law?

Ans. If we apply pressure at a point in the fluid then it transfer it in all the direction equally.

Q. 5 Why does break overheat sometimes?

Ans. Breaks overheat due to jammed break shoes or prolonged use of break.

Mechanical And Automobile Engineering Interview Questions

Automobile Engineering

Automobile engineering is the branch of mechanical engineering which deals with auto movable vehicle. In this article here are the interview and questions for new jobs as well as viva of experiments.Here are the question based on the topics like gear box, ignition system, lubrication system,suspension system, fuel supply system, steering system and breaking system etc..

Questions And Answers Based on Gearbox

Q. 1 What is the principle of gearing?

Ans. The ratio of speeds of the two gears is inversely proportional to the ratios of number of teeth on each gear.

Q. 2 What are the advantages of constant mesh gearbox over sliding mesh gearbox?

Ans. In constant mesh gearbox, the gear engagement is quick, quieter and smooth.

Q. 3 What is double declutching in synchromesh gearbox?

Ans. During the gear change,the driver need to disengage the clutch twice in a very quick time, so it is called as double declutching.

Q. 4 How the hydrostatic propulsion systems work in tactor?

Ans. Hydrostatic propulsion system works according to the Pascal's law. But on the piston of tactor's engine pressure is same. Hence this pressure is devided acording to the area. Like more force on large area and less force on small area.

Questions on Lubrication system

Q. 1 What is an oil breather?

Ans. The oil breather is an opening in the engine lubricating system,through which oil is exposed to the surrounding.

Q. 2 What is the purpose of lubrication?

Ans. The purpose of lubrication is to cool,clean,avoid wear and forming a kind of seal in the parts.

Q. 3 What is the delivery pressure of oil pumps?

Ans. 2.5 to 4.5 kg/cm2

Q 4 What would happen If someone will add lubricating oil to the fuel of a bike?

Ans. The physical properties of lubricating oil are different from the fuel oil. Hence as a result the engine will go to the soon damaging. There will be more wear and tear in the piston and linear. There will be some knocking also. Knocking will reduce the efficiency and breakpower of the engine.

Interview questions you can ask from the interviewer

Q. 6 If the interviewer asks you if you have any question to ask them.

Ans. Interviewer ask this if he is interested to select you. If you are fresher then you can ask about your fork and how it affect the whole company. Otherwise you can ask something about their company and about how early I can start if you offer me a job.

Q. 7 Describe yourself.

Ans. Here is your chance to show your strengths like I am quick learner,very challenging,etc. Here you should show why they select you, So describe all your strengths in short. You should tell your selling skills.

Q. 8 How to answer a difficult question?

Ans. When you are asked some negative information you should answer cheerfully and repeatedly stonewall. Here they check your IQ. so no need to afraid.

Q. 9 Why did you decide to interview for this post?

Ans. Here you should discuss your different needs for different works in increasing challenge and responsibilities. But be careful your need should be a part of growing industry,not your own that will show negative thinking.

Q. 10 What are the main points to keep in mind during interview?

Ans. You should keep calm. You are needed to show yourself realistic and keep yourself in a positive state of mind during the whole interview process.

Q. 11 How many years it will takes to become a partner?

Ans Its up to the interviewer.

Q. 12 What are the valuable working hours of your company?

Ans. Usually these are 8 hours but in case these differ from company to company.

Q.13 How is the firm govern?

Q. 14 Are the decisions made by the associates as well?

Q. 15 How the evaluation handled?

Q. 16 What is the firms overall growth prospect.?

Q. 17 What type of training does the firm do?

Q. 18 Are partners accessible?

Ans. The answer of all above six question is given by the interviewer if you will ask to him. While asking the question you should be gentle and your way should be informative.

Some Interesting Interview Question

What Should Do To Be Selected In The Interview

You should be aware of your skills, abilities and experiences.
You should be able to talk about how you could contribute to the organisation.Show that you believe you can do the job by referring to your skills, abilities and experience.

Research the firm or organisation for which you are being interviewed and find out about the position for which you are applying.Use the internet, friends and relatives or contact the organisation to get information about them and the position. Be prepared to talk about the organisation and why you want to work there.

Your Attitude

Attitude, the one area in your life of which you have absolute control. We write our own path. We all, at one point face perplexed challenge, yet somehow overcome. Perhaps for a brief moment become overwhelmed, however succeed because of attitude. Ability of choice is our sole freedom and choice of attitude can cripple or enlighten you. Choose wisely...

Corporate Job Interview Questions

Q.1 Tell me about your ability to work under pressure?

Ans. To assist with your response give an example of a time in which you were able to achieve a desired outcome under constraints such as time or budget.
example interview response:
"Throughout my career in the IT industry I have always been able to demonstrate a high level of control even when placed under pressure."
For example when employed by ABC Computer Help there were instances in which I received numerous requests for IT support. During these busy times was able categorize requests as either 'urgent' or 'non-urgent' and action them accordingly.
I have been able to develop a means of prioritizing tasks so that my workload remains manageable."

Q.2 Have you done anything to further your experience?

Ans. This could include anything from night classes to hobbies and sports. If it's related, it's worth mentioning.

Obviously anything to do with further education is great, but maybe you're spending time on a home improvement project to work on skills such as self-sufficiency, time management and motivation.

Q. 3 Tell me what you know about this company.

Ans. Do your homework before you go to any interview. Whether it's being the VP of marketing or the mail room clerk, you should know about the company or business you're going to work for.

Has this company been in the news lately? Who are the people in the company you should know about?

Do the background work, it will make you stand out as someone who comes prepared, and is genuinely interested in the company and the job.

Q. 1 Explain Yourself About work?

Ans. I am very much a team player in fact. I have had opportunities in my school and college to develop myself as a team player.

Q. 2 What will you do if you will find another chance to live life?

Ans. Here interviewer wants to know your interest about your work. So you should be very careful. You should say that I am very happy with my career and life. I am very-very happy in my present life.

Q. 3 What do you think? You will be successful at this job?

Ans. You can say that I have mentioned in resume I can be successful in my work at any place and in all the circumstances.

Q. 4 Tell me about yourself? (Here they are asking why should I hire you?)

Ans. Your answer should be short and brief. You should tell your qualification and experience here. You can take your work history and skills also.

Q. 5 What do you know about our firm?

Ans. This is the most important question of an interview. It is asked to check your seriousness about the industry and job.For answering this question prepare yourself before the interview. Go to the internet collect the information and remember that. This will help you a lot.

Latest Interview Questions And Answers

Q. 1 Where do you see yourself in next five years?

Ans. Your answer should be in such a way-

I want to grow in my position and more responsibilities. I want a respected position in this company.

You might also add "Hopefully I will be alive, happy,healthy and thriving in this career."

Q. 2 What motivates you?

Ans. Here you should be very careful. You should never say money motivates me because it will show negativity about work and company.

You can say that I am motivated by life's noble pursuits or you should tell something similar to it.You can tell that I want to be the best in my work or leader of this work.

You can tell that I want to help others.

Q. 3 What is your greatest strength?

Ans. This question provides you the chance to show and shine yourself.Here interviewer is looking about work related strengths. So You can say that I am a great Motivator, I am quick learner, I am a good problem solver etc.

Q. 4 What is your biggest weakness?

Ans. Here you should give answer in such a way that your weakness should be in favor of company and should not affect your work. You can answer that sometimes i will be so serious about my work that I ruined my rest time. etc.

You can tell I have to see my work progress everyday.

Q. 5 Would you rather be liked or feared?

Ans. For answering this type of question you should be very careful. For this question you should reply-

"Neither I had rather be respected"

How To Get Selection In Company

How To Get Selection In Company

You should be aware of your skills, abilities and experiences.

You should be able to talk about how you could contribute to the organisation. Show that you believe you can do the job by referring to your skills, abilities and experience.

Research the firm or organisation for which you are being interviewed and find out about the position for which you are applying.Use the internet, friends and relatives or contact the organisation to get information about them and the position. Be prepared to talk about the organisation and why you want to work there.

Keep Positive Attitude

Attitude, the one area in your life of which you have absolute control. We write our own path. We all, at one point face perplexed challenge, yet somehow overcome. Perhaps for a brief moment become overwhelmed, however succeed because of attitude. Ability of choice is our sole freedom and choice of attitude can cripple or enlighten you. Choose wisely....

When you stop learning, you stop living. Build on your strengths and strive to new challenges.

Final Stage

Download the position description and read more about the position, the skills and experience required.
yes my own skills and experience match what is required.
Now it's time to research the company to find out if its the type of company I want to work for. I have researched them online and am very happy with their mission and values and look sustainable.

I will be in Sydney this weekend soI have made a phone call to the company and have made an appointment with the manager to ask more questions at 11:30am on Monday.