List of top Air Conditioning and Refrigeration Questions

The psychrometric process generally used in winter air conditioning is:
Chemicals like calcium chloride, silica gel and activated alumina are commonly used for the psychrometric process of:
Heat transfers through the metal wall of tubing by:
It starts operating when the pressure in the suction line falls below a pre-determined value:
Which one of the following is not a type of a viscous filter?
The condenser used in a domestic refrigerator:
All pathogenic types of bacteria and nearly all other objectionable organisms in milk are killed by:
Thermostatic expansion valve operates by responding to ...........
Central air conditioning system is used for:
Automatic expansion valve is also known as:
Dairy refrigeration includes:
In a window air conditioner, ............ is used as a safety device.
Normally, the ducts used in air conditioning zones have a ............ shape.
Removal of moisture from the air, without any change in its dry bulb temperature is known as:
Heating of air, without any change in its specific humidity is known as:
It is not a mode of heat transfer:
The evaporator generally used in wine cooling is:
It starts operating when the pressure in the discharge line rises above a certain predetermined pressure.
Brine is used as a secondary refrigerant in:
It is a type of relay:
It is not a water cooled condenser:
Write the steps to save a presentation.

Match the following psychrometric processes (Column I) with the respective changes in thermodynamic properties (Column II) of air-water vapor mixture:


 

The percentage absolute humidity of air becomes equal to the percentage relative humidity, when:
An ideal gas is compressed adiabatically (Adiabatic exponent \( \gamma = 1.4 \)) from 98 kPa to 480 kPa and the specific volume of the gas at the beginning of the compression stroke is \( 0.45 \, \text{m}^3 \, \text{kg}^{-1} \). The specific work done on the gas in kJ kg\(^{-1}\) is __________.