Answer :
Final answer:
When encountering an unfamiliar symbol on a technical drawing, ANSI/IEEE 315 is the reference standard to check for electrical symbols as per the American National Standards Institute, hence the correct option is d) ANSI/IEEE 315.
Explanation:
When facing an unfamiliar symbol on a technical drawing, the reference standard to consult is ANSI/IEEE 315. This standard provides the American National Standards Institute (ANSI)'s conventions for electrical symbols, known for its visual recognition and use in various engineering and technical drawings. For circuit diagrams, two different standards are often used: ANSI and the International Electrotechnical Commission (IEC). Both are commonly used, but ANSI is frequently preferred for its recognizable symbols in American industry.
It is essential for students and professionals alike to be aware of these standards to ensure clear communication and consistent interpretation of technical drawings across the industry. Other standards mentioned, such as ASME Y14.5, ISO 9001 and ASTM A36, serve different purposes or are related to other aspects of engineering and quality management.