The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called
In a pressure enthalpy chart, the space between the saturated liquid line and saturated vapour line, represents sub-cooled liquid region.
The boiling point of carbon dioxide is
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called
When absorptivity (α) =reflectivity (ρ) = 0 and transmittivity (τ) =then the body is said to be a
The evaporator changes the low pressure liquid refrigerant from the expansion valve into
The ratio of actual heat transfer to the maximum possible heat transfer is known as heat exchanger effectiveness.
Most thermostatic expansion valves are set for a superheat of
During sub-cooling, sensible heat from a liquid refrigerant is removed.
R-has the highest critical point temperature.
The mass of water vapour present in __________ is called absolute humidity.
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The by-pass factor of the heating coil is
Prandtl number (PN) is given by PN = μ.cp/k.
For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is
For large tonnage (more thanTR) air-conditioning applications, the compressor recommended is
If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ, and λ + dλ is represented by (eλ.dλ), then eλ is called
The ratio of heat extracted in the refrigerator to the workdone on the refrigerant is called
In a vapour compression system, the condition of refrigerant before passing through the condenser is
The relative coefficient of performance is equal to
An infinite parallel planes with emissivities e1 and e2, the interchange factor for radiation from surface 1 to surface 2 is given by
In case ofsensible cooling of air, the coil efficiency is given by
During adiabatic saturation process on unsaturated air __________ remains constant.
The humidity ratio or specific humidity is the mass of water vapour present in
During a refrigeration cycle, heat is rejected by the refrigerant in a
While designing the refrigeration system of an aircraft, the prime consideration is that the
The critical radius is the insulation radius at which the resistance to heat flow is
The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is
The formation of frost on cooling coils in a refrigerator
A refrigeration system
Please disable the adBlock and continue. Thank you.