Final answer:
The statement regarding Oxyacetylene welding (OAW) and shielded metal arc welding (SMAW) being preferred for field weld repairs is True, as both welding methods offer portability and versatility for on-site repair work. The correct answer to the question is True.
Step-by-step explanation:
Oxyacetylene welding (OAW) and shielded metal arc welding (SMAW) are indeed often preferred for field weld repairs. Oxyacetylene welding is a process where heat is generated by the combustion of acetylene in oxygen. This exothermic reaction produces sufficient heat to melt metals, allowing for effective welding and cutting applications. SMAW, or stick welding, uses an electric current to create an arc between a stick-like electrode and the metals to be joined.
Both welding methods are highly portable and versatile, making them suitable for field weld conditions where other welding methods might be impractical due to, for example, the lack of a power supply or the need for mobility. Furthermore, they do not require external shielding gas tanks because the flux provides the necessary protection from oxidation. This makes OAW and SMAW optimal for varied and demanding field repair scenarios.