Final answer:
Indirect atmospheric-type vaporizers with a capacity of less than 1 quart are not mandated to have over-temperature protection due to their design and the limited amount of liquid they handle.
Step-by-step explanation:
Indirect atmospheric-type vaporizers of less than 1 quart capacity are specific devices used in various applications to vaporize a substance, usually a liquid such as water, by passing a current through it. These devices are not required to be equipped with over-temperature protection. This kind of protection is typically intended to prevent the device from reaching dangerously high temperatures which could lead to malfunction or safety hazards. In the case of small capacity vaporizers, the negligible amount of liquid and the design of the vaporizer itself likely prevents it from reaching such temperatures that would necessitate over-temperature protection.