What is shear force in fluid particle?

nrj yadav

• May 23rd, 2012

The forces acting along the plane of fluid or perpendicular to the longitudinal axis of fluid particle will be called as shear force.

glaro

• Feb 13th, 2012

For newtonian fluids Shear force(T) is directly proportional to velocity gradient(du/dx).
T = mu*du/dt . Where mu is the coefficient of viscosity..

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After giving a bend to the sheet it will become rigid Why?

T240GUY

• May 21st, 2012

It acts to reinforce the metal. Similar to an i-beam. By adding a bend, it adds another axis to the metal which in turn reinforces the sheet. If you bend it again, it will become even more rigid.

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Some of high class sedan cars have two silencers why is that so? Does it actually help in economy of car? how?

t240guy

• May 21st, 2012

The pressure of the exhaust inside the exhaust pipe decreases as it reaches the "silencer". This is because the silencer acts as a larger chamber for the exhaust to expand in. As the exhaust expands,...

Avinash Narode

• May 2nd, 2012

It is useful in V engines in order to reduce back pressure. but in others like in Mahindra XUV it is just for nice appearance.

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What is meant by setting down?

vrsaikumar

 Profile Answers by vrsaikumar Questions by vrsaikumar

• Mar 25th, 2012

Setting down Operation is One of The Forging Operations, Others Being Drawing, upsetting, Fullering,bending punching,etc. when We Hammer down To Get Desired Shape,we can see the Hammer Spots which are...

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Yogesh Nawade

• Mar 14th, 2012

As we know transferring any system from one place to another place their we required power, We know in power system for transferring active power from source to load required reactive power .This power is mostly generated by capacitor.

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Biswajit Dhali

• Mar 1st, 2012

Developers: Frederick W. Taylor and his followers developed and refined the Time Study. Frank B. Gilbreth and his wife Lillian developed and refined the Motion Study. Actually the two studies are di...

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Why do we use solid shafts for transfer of power in case of pumps/ turbines & other machines why we use a hollow shaft (pipe) in universal joints of automobiles; although the rated load and twist is approx. the same.

Arun Govind Neelan

• Feb 27th, 2012

In automobile application we have to consider weight in addition to torque and strength. Hollow shaft has high torque transmitting capacity per unit mass compared to solid shaft. If you consider bending stress diagram for hollow it is min at centre so material requirement is minimum at centre.

ravindra sariya

 Profile Answers by ravindra sariya Questions by ravindra sariya

• Feb 16th, 2012

In case of turbine and pump there is an axial component of force present so solid shaft can deal better than hollow shaft...and in automobile only pure torsion is present and also hollow shaft have le...

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mohamed abdelkareem

• Feb 20th, 2012

In a biaxial stresses there are two stresses in two dimension say (x,y) and caused shape deformation , but in a triaxial stresses there are three stresses in three dimension say(x,y,z) and caused volumetric deformatio.

ahmedsaid2050

 Profile Answers by ahmedsaid2050 Questions by ahmedsaid2050

• Jan 26th, 2012

A biaxial state of stress is defined as a state of stress where one of the three principal stresses is equal to zero: 1 0 , 2 0 , 3 = 0 A triaxial state of stress is defined as a state ...

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rameez.ajmeri

 Profile Answers by rameez.ajmeri Questions by rameez.ajmeri

• Jan 13th, 2012

Hello sargkuna, I would like to correct your answer. In fact there are two reasons, the form factor of power generating alternator is 1.11 due to which the transmission voltage is made in multiples ...

sargkuna

• Jul 26th, 2011

The reason is some thing historical. In olden days when the electricity becomes popular, the people had a misconception that in the transmission line there would be a voltage loss of around 10%. So in...

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Answered by: padmaja

• Oct 5th, 2006

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although four stroke engine is more frequently used 2STROKE engine is more effiecient because for every 2 strokes there is a power stroke.for same power generation 2STROKE ENGINE is compact

hrs7400

 Profile Answers by hrs7400 Questions by hrs7400

• Dec 19th, 2011

2 stock engine is more efficient than 4 strock, because Power generation for 2 strock required one strock of compression and one strock of discahrge, while for the same power a 4 strock engine require...

Pradeep sharma

• Nov 25th, 2011

4 stroke is more efficient due 2 its better milage, less wear & tear of parts, contain valves prevent frm leakage, deliver one power stroke in 4 cyle.

But in case of power, 2 stroke is better. it delivered 1 .8 times more power than 4 stroke.

Bt overall view favoured to 4 stroke engine.

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hrs7400

 Profile Answers by hrs7400 Questions by hrs7400

• Dec 19th, 2011

The capacity of a machine can be calculated by simply measuring the Output from a adesier Input in terms of %efficiency
Capacity =Output/input

rahul

• Dec 16th, 2011

Just multiply work done by machine into time taken.

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List different types of Labyrinth Seals How to measure Labyrinth Seal Clearrence?What is the allowable clearence?

Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Dec 8th, 2011

Different Types of Labyrinth Seal are as follows: Axial Labyrinth Seal Radial Labyrinth Seal Low Cost Labyrinth Seal Bearing Shield Labyrinth Seal Nilos Ring (AV) Labyrinth Seal Nilos Ring (JV) Labyr...

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When some gun powder explode in an iron hollow closed cylinder , how much energy consume to destroy that cylinder?

We have inner and outer diameter and height .
I calculate all of energy by enthalpy of combustion , I don`t know how much convert to thermal energy and how much consume to destroy .

Explain What is Resilience?

ranjeet rajak

• Nov 14th, 2011

When applied the force on the spring they itself change there shape with resilience. & again its comes back there own position without any fracture.the resilience also known
as vibration........

anushri

• Jul 29th, 2011

The ability of a material to absorbs energy within the elastic limit is called resilience.

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Stercus  

 Profile Answers by Stercus Questions by Stercus

• Member Since Dec-2007 | Aug 18th, 2009

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Akash, your FBD won’t work if you leave off external contacts – they need to be converted to force arrows. The buoyed object provides one such force: the buoyant reaction force.

You seem to agree that there is a force acting upwards on the test tube, appearing on the spring balance acting against the weight. As the test tube and the bowl of water are stationary, not accelerating, there must be an equivalent reaction force acting downwards on the body of water, imparted by the object. To go into more detail, the surface of the object experiences a pressure distribution from the water, gradated downwards due to increasing pressure within the water body. The net result from the pressure distribution is that the water pushes up on the object (buoyant force). To avoid being crushed, the object pushes back against this pressure in all directions – so again you get net a reaction force in the opposite direction, downwards.

So the FBD of the water body needs a reaction force to account for buoyancy. This reaction force acts downwards, from the centre of the displaced volume and is equal to the weight of the water displaced. The weight of the object immersed doesn’t need to be considered as this is supported but the weight of the displaced volume of water does.

PRASHANT

• Oct 16th, 2011

It will not change the reading..... Lets take a simple case... A water flask is putted on a weight balance and a rod is immersed in it which is tied to ceiling with help of a rope. The tension in the...

akash.2929

 Profile Answers by akash.2929 Questions by akash.2929

• Aug 18th, 2009

Stercus, u r correct!! :) thnx :)

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Arun

• Oct 16th, 2011

Its a powerful ERP software used for any phase of any indstry

jronak123

 Profile Answers by jronak123 Questions by jronak123

• May 27th, 2008

As a mechanical engineer point of view SAP is not useful much but i m in suzlon & i use SAP For drawing find from around 1000 parts by appprox time 1 minute , than clear GR (GOOD RECEIPT) By ...

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Describe briefly different aspects of energy in our world?

pradeep

• Oct 15th, 2011

Energy-The capacity to do work is called energy.Energy neither be created nor be destroy,it may change one form to another.

k.sathish

• Oct 5th, 2011

Energy means capacity to do work.
In general anything can give useful work is stored in the form of energy.
types: potential - due to position and mass of body
kinematic - due to movement of body
heat - energy in transition, due to chemical reactions

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What is the role of a mechanical engineer? what are the opportunities of a mechanical engineer? can a mechanical engineer work in a mine?

engineer

• Oct 2nd, 2011

A mechanical engineer is the one who has to study various mechanical components which are the basic building blocks of any component . They can repair ,produce and modify any mechanical component .and yes , they can also work in a mine

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what is the difference between Seal and O-ring

Arun

• Sep 30th, 2011

Seal ring provide no gap between combustion chamber and crank case whereas o-ring selves as a lubrication to piston wall and piston.

Neeraj

• Aug 5th, 2011

"O" ring are used to prevent the leakage of oil in between two mating parts, while oil seal is used mainly on shaft to prevent the leakage of lubricants.

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How does MPFI works? & explain me the mechanism of it? What is the purpose of it ?

Rajnish Kumar

• Sep 22nd, 2011

MPFI means Multi point fuel injection.MPFI injects fuel into the intake ports just upstream of each cylinder's intake valve, rather than at a central point within an intake manifold. MPFI (or just MPI...

Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Sep 18th, 2011

MFIS stands for Multi Fuel Injection System. MFIS controls timing along with the amount of fuel that gets injected. In MFIS, air and the fuel is mixed just before the inlet. MPFI system injectors ar...

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