Final answer:
The tensile strength of an E-7018 electrode is 70,000 psi, which corresponds to answer choice c.
Step-by-step explanation:
The tensile strength of an E-7018 electrode is an important characteristic that refers to the maximum amount of tensile stress the electrode can withstand before failing. This type of electrode is commonly used in welding applications and is known for its high tensile strength and superior weldability. It is often used for welding carbon steels and can provide strong and durable welds. In the case of an E-7018, the specified tensile strength is 70,000 pounds per square inch (psi). Therefore, the correct answer is c. 70,000 psi.