ANS:A - capacity

The amount of liquid evaporated per hour in an evaporator is typically defined as its capacity. Capacity refers to the maximum amount of liquid that the evaporator can process or evaporate within a given time frame, usually expressed in terms of mass (such as kilograms) or volume (such as liters) per unit time (such as hours). So, the correct term for the amount of liquid evaporated per hour in an evaporator is: capacity.