To fix the stale point in respect of air-vapour mixtures, three intrinsic properties are needed. Yet, the psychrometric chart requires only two because:

The chart is an approximation to true values

Water vapour is in the superheated state

The chart is for a given pressure

The mixtures can be treated as a perfect gas

To fix the stale point in respect of air-vapour mixtures, three intrin

1.	To fix the stale point in respect of air-vapour mixtures, three intrinsic properties are needed. Yet, the psychrometric chart requires only two because:
A.	Water vapour is in the superheated state
B.	The chart is for a given pressure
C.	The chart is an approximation to true values
D.	The mixtures can be treated as a perfect gas
Answer» C. The chart is an approximation to true values

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To fix the stale point in respect of air-vapour mixtures, three intrinsic properties are needed. Yet, the psychrometric chart requires only two because:

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