A nonadjustable (in length), one section ladder is known as a/an _______________ ladder.

A nonadjustable, one section ladder is referred to as a straight ladder. This type of ladder is typically a single length that does not have the mechanisms or design features that allow for sections to be extended or retracted. Straight ladders are commonly used for tasks such as reaching elevated areas for access or rescue but cannot be adjusted for different heights.

Fixed ladders, on the other hand, are permanently installed and usually found in places like industrial buildings. While they may also be non-adjustable, they serve different applications compared to a straight ladder. Collapsible ladders are designed to compact for storage or transport, facilitating adjustment in form but they do not fit the description of a single length. Extension ladders comprise multiple sections that can be extended to achieve greater heights, contrasting with the single-segment nature of a straight ladder.