The connected joints of pipe, usually made of three joints of pipe approximately 90 feet long, racked in the derrick when making a trip are called a __________.

Correct Answer: Option D — stand

In rotary drilling operations, a stand consists of three connected joints of drill pipe, typically totaling 90 feet. These are racked vertically in the derrick during tripping operations to facilitate efficient handling and storage while the drill string is being pulled from or run into the wellbore.