PYSCHROMETRIC PROCESSES (CONTENT BEYOND SYLLABUS)

When humidity ratio of air ____ air is said to be dehumidified.

• a) increases
  

• 
  b) decreases
  
  

• 
  
  c) remains constant
  
  

• 
  
  d) none of the mentioned
  

Air can be cooled and dehumidified by

• a) circulating chilled water in tube across air flow
  

• 
  b) placing evaporator coil across air flow
  

• 
  c) spraying chilled water to air
  

• 
  d) all of the mentioned

Heating and humidification is done in

• a) summer air conditioning
  

• 
  b) winter air conditioning
  

• 
  c) both of the mentioned
  

• 
  d) none of the mentioned

When air passes through silica gel,

• a) it absorbs water vapour molecules
  

• 
  b) latent heat of condensation is released
  

• 
  c) dbt of air increases
  

• 
  d) all of the mentioned

In adiabatic evaporative cooling, heat transfer between chamber and surroundings is ____

• a) zero
  

• 
  b) high
  

• 
  c) low
  

• d) none of the mentioned

Adiabatic cooling lines which are the same (for water vapour only) as the wet bulb or psychrometric line.
The above given statement is

• a) True
  

• 
  b) False
  

• 
  c) Depends on wet and dry bulb temperature
  

• 
  d) None of the mentioned

A chart showing the humidity versus temperature along with all the other properties of moist air is called

• a) Relative humidity chart
  

• 
  b) Psychrometric chart
  

• 
  c) Air vapour phase chart
  

• d) None of the mentioned

For saturated air, relative humidity is

• a) 100%
  

• 
  b) 50%
  

• 
  c) 0%
  

• d) None of the mentioned

The degree of saturation is the ratio of the ______ humidity to the _______ humidity at the same __________

• a) Actual specific, saturated specific, temperature
  

• 
  b) Saturated specific, actual specific, pressure
  

• 
  c) Actual specific, saturated specific, pressure
  

• 
  d) Saturated specific, actual specific, temperature

What is represented by inclined straight lines but non-uniformly spaced on the psychrometric chart?

• a) Specific humidity
  

• 
  b) Relative humidity
  

• 
  c) WBT
  

• 
  d) DPT