If tempreture dry=25 c , ph=45% , what it actual temperature? by using psychrometric chart
1) 19 c
2) 29 c
3) 39 c
4) 49 c

19°C

Explanation:

When you use a psychrometric chart the thing that you need to know is the value of a least two variables of your system, then you need to intercept these variables and then you can find the other variables seeing the others axis. In your case, you know the dry temperature and the percentage of humidity, so as you see in the attach image your temperature is between 15°C and 20°C. The only choice in that range is  19°C.