Question

Evaporator -

If the pressure drop was less than 2.5 lbs., what would the system have?
A) Low efficiency
B) Normal operation
C) High efficiency
D) Overcharging

Answer 1

If the pressure drop across an evaporator is less than 2.5 lbs., it typically suggests low efficiency due to a negative deviation, which can result from issues like undercharging or blockages.

Step-by-step explanation:

If the pressure drop across an evaporator is less than 2.5 lbs., the system may be experiencing a negative deviation from the expected pressure. This means that the vapor pressure is lower than predicted, potentially indicating issues such as undercharging or blockages in the system which can lead to low efficiency. It is not indicative of normal operation, high efficiency, or overcharging; those conditions would have different pressure and performance characteristics.