Question

for which of the following are separate mechanical, electrical, and plumbing plans commonly required?
larger buildings
permitting purposes
single - story buildings
small residential structures

Explanation:

Larger buildings have complex systems. Mechanical (like HVAC), electrical, and plumbing are extensive. Separate plans help in design, construction, and coordination among different trades. Permitting purposes might just need compliance checks. Single - story and small residential structures are simpler, often with combined or less detailed plans.

Answer:

A. larger buildings