Final answer:
An isolation transformer is used to provide electrical isolation and protect against electric shocks. SNT-TC-1A provides guidelines for qualification and certification of nondestructive testing personnel, with flexibility in program development.
Step-by-step explanation:
An isolation transformer is a transformer that separates two electrical circuits while allowing AC power to flow between them. It is commonly used to provide electrical isolation and to protect against electric shocks in various electrical systems and devices.
One true statement concerning the usage of SNT-TC-1A is that it provides guidelines for the qualification and certification of nondestructive testing personnel. SNT-TC-1A is a recommended practice for industries that use nondestructive testing techniques to ensure the reliability and safety of their products and processes.
Another true statement is that SNT-TC-1A allows flexibility in the development and implementation of nondestructive testing programs. It emphasizes a risk-based approach, where companies can tailor their programs based on the specific needs and criticality of their operations.