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Limit switches automatically monitor and indicate whether the movement limits of a particular device have been exceeded. A standard industrial limit switch is an electromechanical device that contains an actuator linked to a series of contacts.

Psychrometry is a branch of science, which deals about the properties of dry air and water vapour mixture for various conditions and processes.

The dew point temperature is the temperature at which the air can no longer “hold” all of the water vapor which is mixed with it, and some of the water vapor must condense into liquid water. The dew point is always lower than (or equal to) the air temperature

In throttling process, enthalpy remains constant. ( Isenthalpic process)

The batching of concrete is done by measuring and combining required concrete ingredients either by weight or by volume as per the mix design.

In Vapour Compression Refrigeration System (VCRS),Capillary tube is used as an expansion device.

Human comfort depends on

1.Air quality,
2.Water vapour content in air,
3.Temperature of air.

Refrigeration unit can be expressed in
Tonne and in kW (or) kJ/sec

1 Tonne = 3.5 kW

In heat transfer studies,the amount of heat transferred by conduction mode within a solid or between two solids in contact which are having finite temperature difference can be estimated using Fourier law of conduction

Q=K.A. ?T

K -thermal conductivity

A -Sectional area of heat transfer

?T- Temperature difference

In Vapour Compression System(VCRS ) Refrigerant is the fluid that absorbs heat (latent heat of vaporization)in Evaporator and rejects heat in condenser.

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