The torque/couple applied is known as Active Gyroscopic couple.
The effect that see generally the rotors are mounted on bearings that gives reaction and that is known as Reactive Gyroscopic couple.

#FUNDA

By increasing centre distance by some amount we can avoid interferrence between gears.

#FUNDA #TOM

In thermodynamics if spring is attached to the piston then the pressure volume (PV) graph will be linear because spring force is linear and in cylinder volume also increases linearly.

#FUNDA #THERMO

The toughness of the material decreases upon heating because the impurities leave the cotrell atmosphere easliy due to which dislocation find less difficulty to move.

#FUNDA #MATERIAL SCIENCE

For slope of the processes in PV diagram directly see the index power at V (PV^n)
Hence adibatic process is steeper than isothermal because Gamma is more than 1 in this case and holds true for various polytropic processes.

#Funda #Thermo

"Zero" Kelvin is not practical in real usage because it will voilate second law of thermodynamics.
Then the carnot efficiency will be 100% because (Efficiency = 1-(T(L)/T(H))
and by putting T(L)=0 efficiency will come out to be 100%,which means whole heat is converted into work which is voilation of KelvinPlank's statement.

#Funda #Thermo

When cutting side edge angle increases then there is chance of chattering which decreases the tool life.Hence we keep it less than 30 degree for optimal function.

#FUNDA #PRODUCTION

In Heat transfer absorptivity is assumed to be equal to emmisivity because the body is assumed to be in thermal equilibrium. The net heat input must be equal to net heat output. The law which supports it is known as Kirchoff's law.



#FUNDA #HT

The existence of potential function implies that the flow is irrotational.
And its physical significance is that flow happens in decreasing potential ie from higher potential to lower potential

U= - d(phi) /dx
V= - d(phi) /dy

#FUNDA #FM

In Simplex, the condition of degeneracy will be when one or more than one basic variable should be 0.
Such that number of variables will be less than number of equations which will create Degeneracy.


#FUNDA #INDUSTRIAL

The answer to the above poll is


2 Decreases- Pressure generally is applied by fluids, solids cannot apply pressure they induce stress always.
So, by using continuity equation and Bernoulis equation we will get that Area increases pressure increases which happens in Diffuser and vise versa in Nozzle.

#Interview #FUNDA

In lewis beam strength there is an assuption that the beam is of uniform strength.
This assumption is bit practical as we can make a beam of equal strenght either by varying its width linearly or by varying its depth parabollicaly.
Gear tooths when seen as a Cantilever joint we can observe that depth increases as we move from free end towards the fixed end of the tooth.

#FUNDA #Interview

For wear strength we always make safe Pinion because more contact is of pinion rather than gear becuase pinion is of smaller size.
In checking beam strength we check by product of bending stress and tooth factor.
But to find wear strength we just directly design for pinion.


#FUNDA #Interview

In Psychometry chart Specific Humidity is plot on y axis and dry bulb temperature is plot on x axis. Specific humidity is a function of vapour pressure. So as we know as temperature increases vapour pressure increases whivh can be seen in Psychometric chart.

Specific humidity is calculated at a particular location and is the ratio of mass of vapour per kg of dry air.

Relative Humidity is indication of capacity of air to accomodate maximum vapor.
It is the ratio of Vapor pressure to saturated vapour pressure.

#FUNDA #RAC

In Metal cutting
If higher value of Shear angle is given then it means the cutting force will be automatically lower and the shear plane will be smaller, inturn less power is required, so it will produce less heat i. e easier machining.


#Funda #Production

#fun #funda

#Production #Basic #Funda