Question $1$ Answer the following multiple$-$cholce questions $($Total: $5$ marks$)$

If the dry$-$bulb temperature is measured a $21C$ and the wet$-$bulb temperature as $20C,$ the relative humidity

$($a$)80\%$

$($b$)100\%$

$($c$)90\%$

$($d$)85\%$

$($e$)60\%$

A humid air at $27C$ and $h_t=80\%$ is fed to a cooler and leaves at $11C$; hence,

$($a$)$ The absolute humidity of the outlet air will be higher than the feed air

$($b$)$ The absolute humidity of the outlet air will be lower than the feed air

$($c$)$ The absolute humidity of the outlet air will be the same as the feed air

$($d$)$ The absolute humidity of the outlet air will be zero

$($e$)$ No enough information to find the absolute humidity of the outlet air

Humid air at $28C$ has a dew point of $8C$; the mass of dry air that contains $2kg$ of water of this Humid air is approximately:

$($a$)2kg$ dry air

$($b$)0\mathrm{.}007kg$ dry air

$($c$)285kg$ dry air

$($d$)5kg$ dry air

$($e$)500kg$ dry air

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At what condition on the psychometric chart are the dry bulb, wet bulb, and dew$-$point temperatures identical

$($a$)$ At very low relative humidity condition

$($b$)$ At very low Absolute humidity condition

$($c$)$ At saturation condition

$($d$)$ At critical temperature and pressure

$($e$)$ Not possible to be identical

How will the absolute humidity and the relative humidity of the air contained in a well$-$sealed room ch as it is heated?

$($a$)$ The relative humidity will$-$sealed room.

$($b$)$ The absolute humidity will realed room. temperature rises in a well$-$sealed room.

$($c$)$ Both the absolute humidity and the relative sealed room.

$($d$)$ Both the absolute hum happen sealed room.

$($e$)$ All the above are possible to happen