Most important terms & units for mechanical engineer

By

mechanical engineer basic term & basic units 



Torque- it is the type of twisting force.
Torque=(F)force* r(perpendicular distance from the center of axis)

Couple- A pair of two equal and unlike parallel forces(force equal in magnitude with line of action parallel to each other & acting in opposite directions) is known as couple.

Moment= turning force× distance

Stress- P/A  force/area

Strain- change in length/original length

Spring-like is an element of elastic in which the energy is stored when force is applied and regain its original shape when the load is removed.

 Stiffness- it is the property of material to resist the elastic deformation under the action of external load called as stiffness.

Specific weight- it is weight per unit volume of fluid.

Specific volume- it is the volume per unit mass of fluid.

Specific gravity- specific weight of fluid/specific weight of standard fluid

Viscosity- it is the property of fluid in which one layer opposes the other layer of fluid.

dynamic viscosity- it is the quantity Expression of fluid's resistance to flow(shear).

Kinematic viscosity- it is the ratio of the viscous force to interia force

Dynamic viscosity/density

Buyouncy- when an object is immersed in a liquid the opposite force is developed which is upward force & and pushes the object upward.

Bernoulli's equation-

P1+potential energy+ kinetic energy= P2+ potential energy + kinetic energy

Devices for fluid- manometer, mechanical gauges- diaphragm type, Bourdon's pressure gauge, bellow's type pressure gauge

Mach number- Velocity of object/Velocity of sound

Fluid flow- when liquid in the motion

Is know as fluid flow

Draft tube- it is the element of the runner or turbine

It is located at the upward of runner for the liquid to flow through it.

First law of thermodynamic- energy can neither be created or nor be destroyed it just can be converted in one form to another.

Second law- the heat always flow from hot body to cold body.

Third law- at absolute zero the entropy of perfectly crystalline substance is zero.

Entropy- it is the transformation

It is heat loss/ time

The entropy of the universe is changing.

Clarofic value of fuel- total amount of heat liberated when unit mass or unit volume of a fuel is completely burnt in presence of excess supply of oxygen

Boiler- it is used to convert water to steam or vapour

Economizer- it is type of device used for heat exchange it is also know as heat exchanger.

Superheater- it is used to increase the temperature of fluid above its saturation temperature.

Air preheater- these are waste recovery device in which air on its way to furnance is raised in temperature by help of flue gases.
Tubular preheater-
Plate Air preheater-

Boiler draught- it is the device in which the Exhaust or burnt gases are removed to atmosphere through chimney.


Scavnging- it is the process of removing Exhaust gases from the cylinder or burnt gases from cylinder.

Supercharging- in this process the air from the Atmosphere is taken and is been compressed by mixing of Air& fuel.

Turbocharging- inlet air compressor for an internal combustion engine(petrol or diesel)powered from the exhaust air.


Flywheel- it is a device in which the energy is stored and is supply when ever required is generally stored in power stroke.

Energy- the ability to do the work

Power- work done/time taken

Force- m.a

Velocity- displacement/time

Speed- distance/time

Appearance- the final look of product

Comfort- the design should be such that will be easier or comfort the customer.

Work done= force×displacement

Electrode- it is device through which the electricity enters or remove from the object.

Basic units-

1kilometer=1000meter

1hectometer=100meter

1deckameter=10meter

1decimeter=1/10meter

1centimeter=1/100meter

1millimeter=1/1000meter


Basic unit

Meter,Liter,gram


Distance,capacity,weight


1inch=25.4mm              1liter=1000ml

1inch=2.54cm                1day=24hour

1inch=0.0254m              1hour=60minute

1inch=2.54×10^-5           1minute=60second

1inch=0.0278yard

1yard=36inch

1yard=0.914meter

1foot=12inch

1tonne=1000kg

1pound=0.454kg

1kg=2.205pound

1tr=12000 BTU

The above are important terms & units which a mechanical engineer should know
Before going to interview.

Along this there are also lots of concept & terms which we will discuss further in another post. But the above are most important terms.




My name is JITEN PATIL i am from India I am more passionate about writing blog on digital marketing topics, online Earning tips etc.

Comments

Post a Comment

Popular posts from this blog

Classification of manufacturing process

By
Image
              Classification of Manufacturing process Manufacturing is a process of converting the raw materials into final product. Manufacturing deals with the machining by performing various process on raw materials to convert into final product. It's also deals with the different materials Like metals, forming jobs of various sizes It is the process of forming the object of various shapes and sizes by performing various machining process and through which the final product is obtain. Various machines are used in manufacturing of product Ex-lathe - which is used to form jobs of various sizes. Drilling machine - for drilling purpose CNC - to form various metal jobs of different sizes VMC - vertical machining center Milling - used also for metal removal process.And many more machines are used for manufacturing of products.   Lathe - lathe is a machine through which we can obtain different sizes of jobs &          shapes.There are various types of
Read more

Refrigeration process

By
Hello friends Today I am going to discuss refrigeration process & about refrigerator. I will explain this process in a very simple & easy way. Refrigeration process involves removing of heat from the object. It is process which involves of removing heat & further transfering it. The refrigeration process is involved many process for removing heat. Domestic refrigeration, air- conditioner, heat pump. Different refrigerant are used as working substance in refrigeration process. The refrigerant which are used in refrigeration process are given below. Refrigerant is a substance or mixture. Fluid CFCs (chlorofluorocarbons) Feron Any many more. Refrigeration process take place in domestic refrigeration, heat pump, air-conditioning & in many places. Now we are going to see whole process step by step which take place in domestic refrigeration. In domestic refrigeration there are 4-5 components. 1) Compressor 2) Condensor 3)
Read more

Power plant components

By
Hello friends !! Today we are going to discuss various components of power plant as power plant are used to generate power First of all what is power plant?? As the name define power means where the power is generated & plant means a place where all the process of generation  is there. Power is the work done/time taken. Main components of power plant As all of you know about boiler. Boiler are generally used in industries, companies & in power plants. BOILER :The main function of boiler is to convert water into steam or vapours. Boiler are used in power plant for steam generation & to boil water at higher temperature by performing various process throughout it. Boiler are generally of two types Fire tube boiler Water tube boiler Fire tube boiler - it is a type of boiler in which the flue gases are passed through the tube & the water is surrounded with it.means the flue gases passes in tube and outside tube the water is surrounded. As the
Read more