(a) A person is exempt from the licensing requirements of this chapter if the person is installing, operating, repairing, or servicing a locomotive or stationary engine, steam boiler, diesel engine, internal combustion engine, refrigeration compressor or system, hoisting engine, electrical engine, air conditioning equipment or system, or mechanical, electrical, electronic, or communications equipment or apparatus.
(b) This exemption does not permit a person to:
(1) sign an engineering plan or specification if the person is not an engineer; or
(2) use the term "engineer" or "engineering" in any manner prohibited by this chapter.