No. The air conditioning and refrigeration technician registration is required for an individual who performs air conditioning and refrigeration maintenance work for a licensed air conditioning contractor.egistration is required for air conditioning technicians who work under a licensed air conditioning and refrigeration contractor and who performs air conditioning and refrigeration maintenance work. Certification is optional.
The term  ringworm , commonly used to refer to such infections, is a misnomer, since the condition is caused by fungi of several different species and not by parasitic worms. The fungi that cause parasitic infection (dermatophytes) feed on keratin, the material found in the outer layer of skin, hair, and nails. These fungi thrive on warm and moist skin, but may also survive directly on the outsides of hair shafts or in their interiors.
There are about 40 species of fungus that can cause ringworm in humans, but the most common belong to three genera. Trichophyton is the most common cause of ringworm in humans. Microsporum is the most common cause of ringworm in pets, but it can be transmitted to humans.