Mech.mindsolutions

How to find RPM or Dia of Driven pulley or Driver pulley?

Pulley use to transmission power from one place to another place.

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Temperature and it's units.

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What is name of all joints?

Mode of heat transfer?
There are three mode of heat transfer
In picture
1st one is convection or we can say direct mode of heat transfer because in this case object directly in contact with heat.
For example- at last paragraph of post
Second is conduction or we can say a mode in which heat transfer from source to object by the help of any metals or body.
In picture it's showing that one end of metal rod is hot red and heat transfer to other end by the help of molecules.
For example- at last paragraph of post

Third is Radiation
In this type heat transfer from source to object by the help of any medium (air, radiation).

For example- when we boil water in a fry pan then
The base of frypan getting heat by convection.
Frypan handle also get hot after sometime that is conduction.
If you close your hands to frypan( please don't touch frypan and please keep minimum distance from pan 100mm to 200mm) your hand will feel heat that is third mode of heat transfer is Radiation.

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Check valve or NRV(Non return valve)
This type of valve used to flow fluid only in one direction or restrict the back pressure.
For example- check valve use in boiler feed water pipe line(from pump to boiler drum) because if pump shutdown so water of drum flow back in pipe line from boiler drum to pump this process is back pressure or reverse flow.From preventing back pressure we use check valve or NRV.
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