Archive for the ‘INTERVIEW TIPS’ category

Jobs after M.Tech in Mechanical Engineering

October 10, 2011

Post graduation in Mechanical engineering is good mainly from academic and industry research perspective. They have reasonable opportunities, more abroad than India because of the presence of lot of manufacturing firms. Germany, Korea, Japan, and US are some of those countries where mechanical engineers, especially with specialization in automobile engineering can find good jobs. In India, jobs are relatively less fitting a post graduation in mechanical engineering. There is very little research happening in manufacturing sector in India.

 

Private Sector Jobs after M.Tech in Mechanical Engineering

Students who possess a postgraduate degree in mechanical engineering or an additional degree in management can find jobs with the managerial or administrative departments of pioneer industries in the private sector. If they choose, it is also possible for them to go for industry research. Other opportunities are:

  • Teaching in Engineering Colleges
  • Consultant in transportation, logistics and automobile engineering firms
  • IT firms like IBM and Wipro take post graduate mechanical engineers in their software division which supports automobile engineering giants like Ford and other heavy machinery manufacturing giants.
  • Automobile, piping, power sector
  • Fundamental pre-sea training or a program in nautical science to join as navigating officers or marine engineers.

Government Sector Jobs after M.Tech in Mechanical Engineering

Simultaneously, there are a lot of career opportunities that are made available for postgraduate students of Mechanical engineering. Freshers can join as Junior Engineers and there is a possibility that skilled engineers can get promoted to the positions of Assistant Engineers, Assistant Executive Engineers and Executive Engineers in public sector firms which are into multiple areas of manufacturing sector like power plants, machinery plans like HAL and so on. The top most position a mechanical engineer can attain is Superintendent Engineer. These engineers are wanted in field like

 

 

  • Automobile
  • Oil exploration and Refineries
  • Machine tools
  • Mining
  • Heavy Machineries
  • Space Exploration
  • Electronics firms, etc.

Oil manufacturing firms like HPCL offer good opportunities too. In addition to this, the technical divisions of the Defense as well as the space research organization also need mechanical engineers. On top of this, the field of agriculture also gives a big importance to mechanical engineers. Here, engineers are required to manufacture as well as design the equipments needed to enhance the yield of crops.

Job Prospects Abroad after M.Tech in Mechanical Engineering

There are quite a few job opportunities that are available for postgraduates of Mechanical Engineering. Many leading international private as well as government firms employ Mechanical Engineers for research purposes. There are top quality research centres of excellence in mechanical engineering field. Some top notch firms who take in post graduate mechanical engineers are Siemens, Ford and so on.

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List of mechanical core companies in India

October 10, 2011

Dear Friend,

Don’t think about the job as you are a student of an evergreen as well as a core branch i.e.,Mechanical stream.

there are so many chances in Govt. as well as private companies.

There huge number of Core Companies for Mechanical engineer.
some of them are:

1:Hindustan Motors Ltd
2:Hyundai Motors India Ltd
3:Mahindra & Mahindra
4:Royal Enfield Ltd
5:Addison & Co Ltd
6:Ashok Leyland Ltd, Ennore
7:Axles India Ltd
8:TATA Motors
9:Sundaram-Clayton Ltd
10:Tractor and Farm Equipment (TAFE)
11:Tube Investments of India Ltd
12:FIAT
13:Bharat Electronics Ltd.(BEL)
14:Jindal Steel
15:Steel Authority of India Limited(SAIL)
16:Geometrics ,The Developers software for Machine Companies etc…..

Good luck!!!
Good luck!!!

Latest Updates in Mechanical Engineering

September 25, 2011
01-job-interview-easy selection in interview
  • 1hp=how much rpm

We need Torque to find out.

Apply this formula:

T = HP x 5252
           rpm

T = torque (in lb-ft)
HP = horsepower
5252 = constant
rpm = revolutions per minute

  • which mechanism is used in automobile gearing system

Differential mechanism

  • why different types of sound are produced in different bikes though they say run on SI engine

Engine specifications are different in different manufactures like as bore diameter(cc),ignition timing.Also the exhaust passage take more responsible for sound.

  • why entropy decreases with the increase in temperature?

ds=dQ/T

Entropy is inversely proportional to the temperature so.as temp. increases,entropy decreases

  • What type of metal is used in a propeller

Aluminium,stainless steel,magnesium bronze,NIBRAL(nickel,brass,aluminium)

  • why involute curve used in gear

1) it’s smooth to drive the gear.
2) in gears contact is only point, this type is curve take the more load than normal one

  • How Trains take turns, though there is no any differential

Purpose of the differential is to enable vehicles to take turn, by allowing both the wheel to rotate with different speed. This is required when wheels, like in car, are connected with same axle. Interestingly, wheel in trains are not connected with the axle, they are independent and hence can take turns without ant differential. This is same as how the bullock cart takes turns, without any differential.

  • Why freezer in the fridge is placed in top level?

Because density of cold air is higher than warm air,hence itis placed at top.Cold air comes downward & cool the bottom part.

  • what is more dangerous longitudinal stress or Hoop stress and why?

Hoop stress is more dangerous thanlongitudinal stress, because the dangerous area coming underthe hoop stress is circumferential,while in longitudinal,theaxial area will come under dangerous area will will be lessthan circumferential area.So the hoop stress is more dangerous than longitudinal stress

Mechanical Engineering Interview Questions

September 23, 2011

01-interview-interview tips-mechanical engineering interview-job interview

  • What is Heat rate of a Power plant?

Heat rate is a measure of the turbine efficiency. It is determined from the total energy input supplied to the Turbine divided by the electrical energy output.


  • The highest value of Thermal conductivity is expected for

a.) Solid ice   b.) Melting ice c.) Water d.) Boiling water.

Give the Thermal conductivity value.

Solid Ice – 3.48 W/mK

Melting Ice thermal conductivity value is low because temperature is less.

Water’s Thermal conductivity value is 2.18 W/mK.


  • What is a Hydrostatic system?

Hydrostatics is the study of fluid bodies that are

  • At rest
  • Moving sufficiently slowly so there is no relative motion between adjacent parts of the body

For hydrostatic situations

  • There are no shear stresses
  • There are only pressure forces that act perpendicular to any surface.

It’s a closed loop hydraulic systems. It comprises of motor and pump. Here pump supplies energy to motor and motor gives return energy to pump supply.


  • If you heat a piece of steel with a hole in the center will the diameter of the steel get bigger or smaller?

It gets bigger.

(Example: Always the bearings are heated first for new installation in a shaft.)


  • What is the difference between Blower and Fan?

Fan is an air pushing device. Either Axial or Centrifugal type systems are used to move the air in low pressure. It is rotated by a motor separately.

When the fan is a housing of blades and motor, then it called as Blower. It directs the air in a single path with high pressure.


  • How to find a Ductile-Brittle Transition Temperature in metals?

The point at which the fracture energy passes below a pre-determined point for a standard Impact tests. DBTT is important since, once a material is cooled below the DBTT, it has a much greater tendency to shatter on impact instead of bending or deforming.


  • What is Hydrodynamic Cavitation?

Hydrodynamic cavitation describes the process of vaporization in a constrained channel at a specific velocity.

Bubble generation and Bubble implosion which occurs in a flowing liquid as a result of a decrease and subsequent increase in pressure.

Entry Level Mechanical Engg Jobs Interview Questions

September 20, 2011

01-interview jokes-interview hunt-interview HR questions

1) Difference between Performance and Efficiency?

· The accomplishment of a given task measured against preset known standards of accuracy, completeness, cost, and speed is called as Performance.

· Efficiency is defined as the input given and the work obtained from that input like money, time, labour etc. It’s the main factor of productivity.


 

2) What is the difference between Impact Force & Sudden Force?

· An impact is a high force or shock applied over a short time period when two or more bodies collide.

· A force which applies on the body (material) suddenly is known as sudden force.


 

3) Difference between Antifriction Bearing and Journal Bearing

Generally, journal bearings have higher friction force, consume higher energy and release more heat, but they have larger contact surface, so normally used in low speed high load applications. In anti friction bearings friction is less.  One object just rolls over each other.


 

4) What is a Cotter joint?

A cotter joint is used to connect rigidly two co-axial rods or bars which are subjected to axial tensile or compressive forces. Here shaft is locked in place by a smaller pin that passes through the side of the lug and partly or completely through the shaft itself. This locking pin is named as cotter.


 

5) What is difference between Hardness and Toughness?

· Toughness is the ability of a material to absorb energy.

· Hardness is the ability of a material to withstand wear.


 

6) What is the difference between Toughness, Hardness and Strength?

· Toughness is the ability of a material to absorb energy.

· Hardness is the ability of a material to withstand wear.

· Strength is generally withstanding stresses, fatigue etc.


 

7) What is the difference between Strength and Stamina?

· Strength is capability over a short length of time.

· Stamina is the ability to keep going continuously.

 

Mechanical Engineering Interview Questions For Fresher’s

September 20, 2011

01-interview yourself-interview your strength and weakness

1. How do you come to know air is Fully Saturated?

In its Dew point. (100% relative humidity condition).


 

2. What is the hottest part of refrigerant in the refrigeration System?

Compressor. (Some types of refrigeration system will reach up to 311 deg Celsius.)


 

3. How to measure Temperature of a Bearing?

Normally the temperature range from 80 degree to 110 degree Celsius. So the following temperature measurement devices are used.

· Dial Type Bearing Temperature Detector

· Stator Winding Temperature Detector

· Resistance Bearing Temperature Detector (Bearing RTD)

· Specialized in Pin type RTD


 

4. What is the purpose of Geyser Pressure Valve?

To release the pressure created inside due to evaporation of water.


 

5. What is a Sentinel Relief Valve?

It’s a special type valve system. The valve will open when exhaust casing pressure is excessive (high). The valve warns the operator only; it is not intended to relieve the casing pressure.


 

6. How is the excess Discharge Pressure prevented?

Discharge pressure prevented by a pressurized spike cushion. Here the system employs a pressurized cushion of air and a two o-ring piston, which permanently separates this air cushion from the water system. When the valve closes and the water flow is suddenly stopped, the pressure spike pushes the piston up the arrester chamber against the pressurized cushion of air. The air cushion in the arrester reacts instantly, absorbing the pressure spike that causes water hammer.


 

7. What does F.O.F. stand for in Piping design?

Face of Flange.

The F.O.F (Raised face and Flat face) is used to know the accurate dimension of the flange in order to avoid the minute errors in measurement in case of vertical or horizontal pipe lines.

Frequently Asked Interview Questions for Mechanical Engineers!!

September 18, 2011

1.         What is friction?

2.         What is gear ratio? How it can calculate

3.         What is gyroscopic and gyroscopic effect?

4.         What is mean by Resistance welding
5.         What Is Mean By Ss-314(Stainless Steel Pipe Grade)?
6.         What is pulverization?
7.          What is requirement of bottle filling machine
8.          What is Solution Annealing? kindly explain its process in brief.
9.          What is the basic need for designing the bottle filling machines
10.        What is the critical speed. Compare the critical speed of hollow shaft and solid shaft.
11.        What is the definition of mechanical
12.        What Is The Difference Between Rated Speed And Economic Speed?
13.        What Is The Difference In Is2062 And Is1239
14.        What is the difference between construction of reaction turbine and impulse turbine
15.        What is the difference  between Torque and Power ( layman Idea)?
16.        What is the manufacturing process for impellers of closed, semi open and open type?
17.        What is the principle of operation of simple jet propulsion system?
18.        What is the relationship between cop and hp(horse power) of compressor?
19.        What is the thermodynamics?
20.        What is the use of vanadium (non metal) ?
21.        What is thermodynamics?
22.        What is unit Ps ?
23.        What’s the difference between front and rear wheel drive? on what basis we choose the type of drive?
24.        Whats the range of poissons ratio of a stable material??
25.        When a solid shaft is subjected to tension its linear dimension changes equally as its lateral dimension,then what will               be its poissons
26.        Whether ductile material can fail in brittle manner? WHEN?
27.        Which engine is more suitable over all. petrol engine, diesel engine . what are their differences
28.        Who are the leaders among expansion valve manufacturers? what are the recent developments in the expansion                     valve industry, used in refrigeration abd air-conditioning?
29.        Why Air Conditioner capacity measured in Ton. Like 1.5ton
30.        Why as atmospheric pressure increases,boiling point also increases?
31.        Why desuperheater tubes are bend in shape
32.        Why diesel engine does not have spark plug like petrol engine, how ever petrol is better fuel than diesel?
33.        Why does cycle rim don’t bend even in heavy loads?
34.        Why green curtons are used in hospital?
35.        Why petrol engine gives more power than diesel engine even though diesel engine has high compression ratio?
36.        Why petrol engines have more power than diesel engines of same capacity?
37.        Why the back wheel of tractor is bigger than front wheel?
38.        Why the path of a satellite is always elliptical with earth not at the center of the ellipse?
39.        Why tyres are manufactured in black colour?
40.        Why we cant measure absolute entropy directly,but the change we can?
41.        Why we express the unit of torque in Nm.even though it can be expressed as Joule ( J )?
42.        Why we have to know the specific frequency of any equipment? does anybody know about specific frequency ?
43.        Will you tell me about types and numbers of sensors in Toyota Corolla GLI, Honda Civic and Suzuki Cultus VXRI?
44.        Write down the expression for air standard efficiency of diesel cycle?
45.        You have to design a machine component. For what type of failure (ductile or brittle) you will design?
46.        Even though LPG is economical than petrol,why we are not promoting LPG usage?
47.        Explain bearing nomenclature with example.
48.        Explain Why Nozzles are made convergent and Divergent?
49.        Function of clutch?
50.        How a Diesel Engine Works in Generators?Explain with Labeled Diagram.
51.        How can u increase the efficiency of power plant without changing in effort?
52.        How gravity filling machine is designed
53.        How Hydraulic Power Steering & Clutch works please explain ?
54.        How much efficiency loss will took place in a steam turbine due to low vacuum
55.        how to calculate the speed of conveyor in meter per minute
56.        How to convert from HP to BHP or CC to BHP please explain?
57.        How to find rating of Chiller a.c. plant i.e. how to calculate the a.c. load of an area, needed by Chiller ?
58.        How to measure sound level of engine of tractor?
59.        How turbo charger works?
60.        If I want to set a power plant in desert of ‘Rajasthan’ and I have option of steam and gas power plant. Which plant I                 should set up?
61.        If the blade height is increased,then how it increases the specific speed of centrifugal pump?
62.        If u have to give support in 1 km long bridge,where u will give it & how many?
63.        In a Waste heat recovery boiler feed control valve is after the economizer where as in auxiliary boiler feed control                   valve is given before the economizer.why?
64.        In auto mobile industry for any type of vehicle how can we differentiate 2 stroke and 4 stroke engine….
65.        In hydraulic clutch mechanism can i adjust clutch play? if it is possible please explain ?
66.        increase in unit speed increases the discharge of impulse turbine how?
67.        Name fuels used in nuclear power plant?
68.        On what property u can distinguish material as brittle or ductile?
69.        On what thermodynamic cycle nuclear power plant works?
70.        Pipe. Whats The Concept Behind It?
71.        Purpose of centrifugal pump casing wear ring and impeller wear ring what is back plate in centrifugal pumps and its                 purpose?
72.        Suppose a steel bar of cross sectional area A is subjected to load P at one end and 2P at the other end ,what will be                  the induced
73.        What is vaily gap in welding?
74.        What are engines that use carburetor and that use inductor ? difference between them
75.        What are the conditions considered while evaluating MARGIN OF SAFETY for newly designed mechanical                                components….?
76.        What are the types of welding machine?
77.        What are your significant functional achievements in the present company? How did they contribute to the total                       process
78.        What do you mean gy “Clausius inequality”?
79.        What does a pump develops? Flow or Pressure. Give the Answer with Proper Logic.
80.        What for orifice using in liquid flow line
81.        What is bearing? how many types of bearing
82.        What is difference between sand blasting and grit blasting ? What is its purpose and how is it done ?
83.        What is drive speed & what is driven speed
84.        What is Dry Bulb Temperature and Wet Bulb temperature?
85.        what is electronically operated pneumatic valves? give one example
86.        What is FEED?
87.        A bearing is designated as 6205 , what is it’s bore diameter?
88.        Advantages and disadvantages of using LPG in car?
89.        All Rector or Exchanger have spherical/hemispherical end Why?
90.        Compare Bray-ton and Otto cycle.
91.        Current rating of a 3 phase DG set is 20 Amps, but what will be the per phase current for single phase supply.
92.        Define Overall Heat transfer coefficient.
93.        Does Is 2062 Specifies Only Seamless Pipes Or Erw Pipe Is Also Covered Under Is 2062