Final answer:
Welders who work with a hat do not have a higher incidence of Metal Fume Fever (MFF).
Step-by-step explanation:
Welders who work with a hat tend to have a higher incidence of MFF (Metal Fume Fever).
This statement is false.
Metal Fume Fever (MFF) is a condition caused by the inhalation of metal fumes, typically from welding or heating processes.
Wearing a hat does not affect the incidence of MFF; it is primarily dependent on the exposure to metal fumes and the use of proper respiratory protection.