The dehumidification process, on the psychrometric chart, is shown by
The human body feels comfortable when the heat stored in the body is
Most air cooled condensers are designed to operate with a temperature difference of
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
In aqua-ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in
Which of the following refrigerant has the lowest boiling point?
The most commonly used method for the design of duct size is the
In counter-current flow heat exchangers
In larger industrial and commercial reciprocating compression systems, refrigerent widely used is
Radiation is the process of heat transfer in which heat flows from a __________ , in a straight line, without affecting the intervening medium.
The heating of air, without any change in its specific humidity, is known as sensible heating.
The freezing point of sulphur dioxide is
The value of the wave length for maximum emissive power is given by
In a domestic vapour compression refrigerator, the refrigerant commonly used is
The vertical and uniformly spaced lines on a psychrometric chart indicates
A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in __________ power per tonne of refrigeration.
Which of the following refrigerant is highly toxic and flammable?
In a psychrometric chart, specific humidity (moisture content) lines are
During sensible cooling of air, the relative humidity increases.
In a psychrometric chart, specific humidity (moisture content) lines are
The ratio of the energy absorbed by the body to the total energy falling on it, is called
The amount of heat flow through a body by conduction is
A condenser is used in the __________ pressure side of a refrigerating system.
The temperature of air recorded by a thermometer, when it is not effected by the moisture present in the air, is called
The power per tonne of refrigeration is
The capillary tube, as an expansion device, is used in
The unit of Stefan-Boltzmann constant is
The expression Q = ρ AT4 is called
During sensible heating of air __________ decreases.
The heat transfer from a hot body to a cold body is directly proportional to the surface area and difference of temperatures between the two bodies. This statement is called